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Commit 2c9b3512 authored by Linus Torvalds's avatar Linus Torvalds
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm 

Pull kvm updates from Paolo Bonzini:
 "ARM:

   - Initial infrastructure for shadow stage-2 MMUs, as part of nested
     virtualization enablement

   - Support for userspace changes to the guest CTR_EL0 value, enabling
     (in part) migration of VMs between heterogenous hardware

   - Fixes + improvements to pKVM's FF-A proxy, adding support for v1.1
     of the protocol

   - FPSIMD/SVE support for nested, including merged trap configuration
     and exception routing

   - New command-line parameter to control the WFx trap behavior under
     KVM

   - Introduce kCFI hardening in the EL2 hypervisor

   - Fixes + cleanups for handling presence/absence of FEAT_TCRX

   - Miscellaneous fixes + documentation updates

  LoongArch:

   - Add paravirt steal time support

   - Add support for KVM_DIRTY_LOG_INITIALLY_SET

   - Add perf kvm-stat support for loongarch

  RISC-V:

   - Redirect AMO load/store access fault traps to guest

   - perf kvm stat support

   - Use guest files for IMSIC virtualization, when available

  s390:

   - Assortment of tiny fixes which are not time critical

  x86:

   - Fixes for Xen emulation

   - Add a global struct to consolidate tracking of host values, e.g.
     EFER

   - Add KVM_CAP_X86_APIC_BUS_CYCLES_NS to allow configuring the
     effective APIC bus frequency, because TDX

   - Print the name of the APICv/AVIC inhibits in the relevant
     tracepoint

   - Clean up KVM's handling of vendor specific emulation to
     consistently act on "compatible with Intel/AMD", versus checking
     for a specific vendor

   - Drop MTRR virtualization, and instead always honor guest PAT on
     CPUs that support self-snoop

   - Update to the newfangled Intel CPU FMS infrastructure

   - Don't advertise IA32_PERF_GLOBAL_OVF_CTRL as an MSR-to-be-saved, as
     it reads '0' and writes from userspace are ignored

   - Misc cleanups

  x86 - MMU:

   - Small cleanups, renames and refactoring extracted from the upcoming
     Intel TDX support

   - Don't allocate kvm_mmu_page.shadowed_translation for shadow pages
     that can't hold leafs SPTEs

   - Unconditionally drop mmu_lock when allocating TDP MMU page tables
     for eager page splitting, to avoid stalling vCPUs when splitting
     huge pages

   - Bug the VM instead of simply warning if KVM tries to split a SPTE
     that is non-present or not-huge. KVM is guaranteed to end up in a
     broken state because the callers fully expect a valid SPTE, it's
     all but dangerous to let more MMU changes happen afterwards

  x86 - AMD:

   - Make per-CPU save_area allocations NUMA-aware

   - Force sev_es_host_save_area() to be inlined to avoid calling into
     an instrumentable function from noinstr code

   - Base support for running SEV-SNP guests. API-wise, this includes a
     new KVM_X86_SNP_VM type, encrypting/measure the initial image into
     guest memory, and finalizing it before launching it. Internally,
     there are some gmem/mmu hooks needed to prepare gmem-allocated
     pages before mapping them into guest private memory ranges

     This includes basic support for attestation guest requests, enough
     to say that KVM supports the GHCB 2.0 specification

     There is no support yet for loading into the firmware those signing
     keys to be used for attestation requests, and therefore no need yet
     for the host to provide certificate data for those keys.

     To support fetching certificate data from userspace, a new KVM exit
     type will be needed to handle fetching the certificate from
     userspace.

     An attempt to define a new KVM_EXIT_COCO / KVM_EXIT_COCO_REQ_CERTS
     exit type to handle this was introduced in v1 of this patchset, but
     is still being discussed by community, so for now this patchset
     only implements a stub version of SNP Extended Guest Requests that
     does not provide certificate data

  x86 - Intel:

   - Remove an unnecessary EPT TLB flush when enabling hardware

   - Fix a series of bugs that cause KVM to fail to detect nested
     pending posted interrupts as valid wake eents for a vCPU executing
     HLT in L2 (with HLT-exiting disable by L1)

   - KVM: x86: Suppress MMIO that is triggered during task switch
     emulation

     Explicitly suppress userspace emulated MMIO exits that are
     triggered when emulating a task switch as KVM doesn't support
     userspace MMIO during complex (multi-step) emulation

     Silently ignoring the exit request can result in the
     WARN_ON_ONCE(vcpu->mmio_needed) firing if KVM exits to userspace
     for some other reason prior to purging mmio_needed

     See commit 0dc90226 ("KVM: x86: Suppress pending MMIO write
     exits if emulator detects exception") for more details on KVM's
     limitations with respect to emulated MMIO during complex emulator
     flows

  Generic:

   - Rename the AS_UNMOVABLE flag that was introduced for KVM to
     AS_INACCESSIBLE, because the special casing needed by these pages
     is not due to just unmovability (and in fact they are only
     unmovable because the CPU cannot access them)

   - New ioctl to populate the KVM page tables in advance, which is
     useful to mitigate KVM page faults during guest boot or after live
     migration. The code will also be used by TDX, but (probably) not
     through the ioctl

   - Enable halt poll shrinking by default, as Intel found it to be a
     clear win

   - Setup empty IRQ routing when creating a VM to avoid having to
     synchronize SRCU when creating a split IRQCHIP on x86

   - Rework the sched_in/out() paths to replace kvm_arch_sched_in() with
     a flag that arch code can use for hooking both sched_in() and
     sched_out()

   - Take the vCPU @id as an "unsigned long" instead of "u32" to avoid
     truncating a bogus value from userspace, e.g. to help userspace
     detect bugs

   - Mark a vCPU as preempted if and only if it's scheduled out while in
     the KVM_RUN loop, e.g. to avoid marking it preempted and thus
     writing guest memory when retrieving guest state during live
     migration blackout

  Selftests:

   - Remove dead code in the memslot modification stress test

   - Treat "branch instructions retired" as supported on all AMD Family
     17h+ CPUs

   - Print the guest pseudo-RNG seed only when it changes, to avoid
     spamming the log for tests that create lots of VMs

   - Make the PMU counters test less flaky when counting LLC cache
     misses by doing CLFLUSH{OPT} in every loop iteration"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (227 commits)
  crypto: ccp: Add the SNP_VLEK_LOAD command
  KVM: x86/pmu: Add kvm_pmu_call() to simplify static calls of kvm_pmu_ops
  KVM: x86: Introduce kvm_x86_call() to simplify static calls of kvm_x86_ops
  KVM: x86: Replace static_call_cond() with static_call()
  KVM: SEV: Provide support for SNP_EXTENDED_GUEST_REQUEST NAE event
  x86/sev: Move sev_guest.h into common SEV header
  KVM: SEV: Provide support for SNP_GUEST_REQUEST NAE event
  KVM: x86: Suppress MMIO that is triggered during task switch emulation
  KVM: x86/mmu: Clean up make_huge_page_split_spte() definition and intro
  KVM: x86/mmu: Bug the VM if KVM tries to split a !hugepage SPTE
  KVM: selftests: x86: Add test for KVM_PRE_FAULT_MEMORY
  KVM: x86: Implement kvm_arch_vcpu_pre_fault_memory()
  KVM: x86/mmu: Make kvm_mmu_do_page_fault() return mapped level
  KVM: x86/mmu: Account pf_{fixed,emulate,spurious} in callers of "do page fault"
  KVM: x86/mmu: Bump pf_taken stat only in the "real" page fault handler
  KVM: Add KVM_PRE_FAULT_MEMORY vcpu ioctl to pre-populate guest memory
  KVM: Document KVM_PRE_FAULT_MEMORY ioctl
  mm, virt: merge AS_UNMOVABLE and AS_INACCESSIBLE
  perf kvm: Add kvm-stat for loongarch64
  LoongArch: KVM: Add PV steal time support in guest side
  ...
parents c43a20e4 332d2c1d
Expand all Hide whitespace changes
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Showing with 7757 additions and 2322 deletions
Documentation/admin-guide/kernel-parameters.txt
View file @ 2c9b3512
......@@ -2722,6 +2722,24 @@
[KVM,ARM,EARLY] Allow use of GICv4 for direct
injection of LPIs.
kvm-arm.wfe_trap_policy=
[KVM,ARM] Control when to set WFE instruction trap for
KVM VMs. Traps are allowed but not guaranteed by the
CPU architecture.
trap: set WFE instruction trap
notrap: clear WFE instruction trap
kvm-arm.wfi_trap_policy=
[KVM,ARM] Control when to set WFI instruction trap for
KVM VMs. Traps are allowed but not guaranteed by the
CPU architecture.
trap: set WFI instruction trap
notrap: clear WFI instruction trap
kvm_cma_resv_ratio=n [PPC,EARLY]
Reserves given percentage from system memory area for
contiguous memory allocation for KVM hash pagetable
......@@ -4036,9 +4054,9 @@
prediction) vulnerability. System may allow data
leaks with this option.
no-steal-acc [X86,PV_OPS,ARM64,PPC/PSERIES,RISCV,EARLY] Disable
paravirtualized steal time accounting. steal time is
computed, but won't influence scheduler behaviour
no-steal-acc [X86,PV_OPS,ARM64,PPC/PSERIES,RISCV,LOONGARCH,EARLY]
Disable paravirtualized steal time accounting. steal time
is computed, but won't influence scheduler behaviour
nosync [HW,M68K] Disables sync negotiation for all devices.
......
Documentation/virt/coco/sev-guest.rst
View file @ 2c9b3512
......@@ -176,6 +176,25 @@ to SNP_CONFIG command defined in the SEV-SNP spec. The current values of
the firmware parameters affected by this command can be queried via
SNP_PLATFORM_STATUS.
2.7 SNP_VLEK_LOAD
-----------------
:Technology: sev-snp
:Type: hypervisor ioctl cmd
:Parameters (in): struct sev_user_data_snp_vlek_load
:Returns (out): 0 on success, -negative on error
When requesting an attestation report a guest is able to specify whether
it wants SNP firmware to sign the report using either a Versioned Chip
Endorsement Key (VCEK), which is derived from chip-unique secrets, or a
Versioned Loaded Endorsement Key (VLEK) which is obtained from an AMD
Key Derivation Service (KDS) and derived from seeds allocated to
enrolled cloud service providers.
In the case of VLEK keys, the SNP_VLEK_LOAD SNP command is used to load
them into the system after obtaining them from the KDS, and corresponds
closely to the SNP_VLEK_LOAD firmware command specified in the SEV-SNP
spec.
3. SEV-SNP CPUID Enforcement
============================
......
Documentation/virt/kvm/api.rst
View file @ 2c9b3512
This diff is collapsed.
Documentation/virt/kvm/devices/arm-vgic.rst
View file @ 2c9b3512
......@@ -31,7 +31,7 @@ Groups:
KVM_VGIC_V2_ADDR_TYPE_CPU (rw, 64-bit)
Base address in the guest physical address space of the GIC virtual cpu
interface register mappings. Only valid for KVM_DEV_TYPE_ARM_VGIC_V2.
This address needs to be 4K aligned and the region covers 4 KByte.
This address needs to be 4K aligned and the region covers 8 KByte.
Errors:
......
Documentation/virt/kvm/halt-polling.rst
View file @ 2c9b3512
......@@ -79,11 +79,11 @@ adjustment of the polling interval.
Module Parameters
=================
The kvm module has 3 tuneable module parameters to adjust the global max
polling interval as well as the rate at which the polling interval is grown and
shrunk. These variables are defined in include/linux/kvm_host.h and as module
parameters in virt/kvm/kvm_main.c, or arch/powerpc/kvm/book3s_hv.c in the
powerpc kvm-hv case.
The kvm module has 4 tunable module parameters to adjust the global max polling
interval, the initial value (to grow from 0), and the rate at which the polling
interval is grown and shrunk. These variables are defined in
include/linux/kvm_host.h and as module parameters in virt/kvm/kvm_main.c, or
arch/powerpc/kvm/book3s_hv.c in the powerpc kvm-hv case.
+-----------------------+---------------------------+-------------------------+
|Module Parameter | Description | Default Value |
......@@ -105,7 +105,7 @@ powerpc kvm-hv case.
| | grow_halt_poll_ns() | |
| | function. | |
+-----------------------+---------------------------+-------------------------+
|halt_poll_ns_shrink | The value by which the | 0 |
|halt_poll_ns_shrink | The value by which the | 2 |
| | halt polling interval is | |
| | divided in the | |
| | shrink_halt_poll_ns() | |
......
Documentation/virt/kvm/x86/amd-memory-encryption.rst
View file @ 2c9b3512
......@@ -466,6 +466,112 @@ issued by the hypervisor to make the guest ready for execution.
Returns: 0 on success, -negative on error
18. KVM_SEV_SNP_LAUNCH_START
----------------------------
The KVM_SNP_LAUNCH_START command is used for creating the memory encryption
context for the SEV-SNP guest. It must be called prior to issuing
KVM_SEV_SNP_LAUNCH_UPDATE or KVM_SEV_SNP_LAUNCH_FINISH;
Parameters (in): struct kvm_sev_snp_launch_start
Returns: 0 on success, -negative on error
::
struct kvm_sev_snp_launch_start {
__u64 policy; /* Guest policy to use. */
__u8 gosvw[16]; /* Guest OS visible workarounds. */
__u16 flags; /* Must be zero. */
__u8 pad0[6];
__u64 pad1[4];
};
See SNP_LAUNCH_START in the SEV-SNP specification [snp-fw-abi]_ for further
details on the input parameters in ``struct kvm_sev_snp_launch_start``.
19. KVM_SEV_SNP_LAUNCH_UPDATE
-----------------------------
The KVM_SEV_SNP_LAUNCH_UPDATE command is used for loading userspace-provided
data into a guest GPA range, measuring the contents into the SNP guest context
created by KVM_SEV_SNP_LAUNCH_START, and then encrypting/validating that GPA
range so that it will be immediately readable using the encryption key
associated with the guest context once it is booted, after which point it can
attest the measurement associated with its context before unlocking any
secrets.
It is required that the GPA ranges initialized by this command have had the
KVM_MEMORY_ATTRIBUTE_PRIVATE attribute set in advance. See the documentation
for KVM_SET_MEMORY_ATTRIBUTES for more details on this aspect.
Upon success, this command is not guaranteed to have processed the entire
range requested. Instead, the ``gfn_start``, ``uaddr``, and ``len`` fields of
``struct kvm_sev_snp_launch_update`` will be updated to correspond to the
remaining range that has yet to be processed. The caller should continue
calling this command until those fields indicate the entire range has been
processed, e.g. ``len`` is 0, ``gfn_start`` is equal to the last GFN in the
range plus 1, and ``uaddr`` is the last byte of the userspace-provided source
buffer address plus 1. In the case where ``type`` is KVM_SEV_SNP_PAGE_TYPE_ZERO,
``uaddr`` will be ignored completely.
Parameters (in): struct kvm_sev_snp_launch_update
Returns: 0 on success, < 0 on error, -EAGAIN if caller should retry
::
struct kvm_sev_snp_launch_update {
__u64 gfn_start; /* Guest page number to load/encrypt data into. */
__u64 uaddr; /* Userspace address of data to be loaded/encrypted. */
__u64 len; /* 4k-aligned length in bytes to copy into guest memory.*/
__u8 type; /* The type of the guest pages being initialized. */
__u8 pad0;
__u16 flags; /* Must be zero. */
__u32 pad1;
__u64 pad2[4];
};
where the allowed values for page_type are #define'd as::
KVM_SEV_SNP_PAGE_TYPE_NORMAL
KVM_SEV_SNP_PAGE_TYPE_ZERO
KVM_SEV_SNP_PAGE_TYPE_UNMEASURED
KVM_SEV_SNP_PAGE_TYPE_SECRETS
KVM_SEV_SNP_PAGE_TYPE_CPUID
See the SEV-SNP spec [snp-fw-abi]_ for further details on how each page type is
used/measured.
20. KVM_SEV_SNP_LAUNCH_FINISH
-----------------------------
After completion of the SNP guest launch flow, the KVM_SEV_SNP_LAUNCH_FINISH
command can be issued to make the guest ready for execution.
Parameters (in): struct kvm_sev_snp_launch_finish
Returns: 0 on success, -negative on error
::
struct kvm_sev_snp_launch_finish {
__u64 id_block_uaddr;
__u64 id_auth_uaddr;
__u8 id_block_en;
__u8 auth_key_en;
__u8 vcek_disabled;
__u8 host_data[32];
__u8 pad0[3];
__u16 flags; /* Must be zero */
__u64 pad1[4];
};
See SNP_LAUNCH_FINISH in the SEV-SNP specification [snp-fw-abi]_ for further
details on the input parameters in ``struct kvm_sev_snp_launch_finish``.
Device attribute API
====================
......@@ -497,9 +603,11 @@ References
==========
See [white-paper]_, [api-spec]_, [amd-apm]_ and [kvm-forum]_ for more info.
See [white-paper]_, [api-spec]_, [amd-apm]_, [kvm-forum]_, and [snp-fw-abi]_
for more info.
.. [white-paper] https://developer.amd.com/wordpress/media/2013/12/AMD_Memory_Encryption_Whitepaper_v7-Public.pdf
.. [api-spec] https://support.amd.com/TechDocs/55766_SEV-KM_API_Specification.pdf
.. [amd-apm] https://support.amd.com/TechDocs/24593.pdf (section 15.34)
.. [kvm-forum] https://www.linux-kvm.org/images/7/74/02x08A-Thomas_Lendacky-AMDs_Virtualizatoin_Memory_Encryption_Technology.pdf
.. [snp-fw-abi] https://www.amd.com/system/files/TechDocs/56860.pdf
Documentation/virt/kvm/x86/errata.rst
View file @ 2c9b3512
......@@ -48,3 +48,21 @@ have the same physical APIC ID, KVM will deliver events targeting that APIC ID
only to the vCPU with the lowest vCPU ID. If KVM_X2APIC_API_USE_32BIT_IDS is
not enabled, KVM follows x86 architecture when processing interrupts (all vCPUs
matching the target APIC ID receive the interrupt).
MTRRs
-----
KVM does not virtualize guest MTRR memory types. KVM emulates accesses to MTRR
MSRs, i.e. {RD,WR}MSR in the guest will behave as expected, but KVM does not
honor guest MTRRs when determining the effective memory type, and instead
treats all of guest memory as having Writeback (WB) MTRRs.
CR0.CD
------
KVM does not virtualize CR0.CD on Intel CPUs. Similar to MTRR MSRs, KVM
emulates CR0.CD accesses so that loads and stores from/to CR0 behave as
expected, but setting CR0.CD=1 has no impact on the cachaeability of guest
memory.
Note, this erratum does not affect AMD CPUs, which fully virtualize CR0.CD in
hardware, i.e. put the CPU caches into "no fill" mode when CR0.CD=1, even when
running in the guest.
\ No newline at end of file
MAINTAINERS
View file @ 2c9b3512
......@@ -12248,6 +12248,8 @@ L: linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
L: kvmarm@lists.linux.dev
S: Maintained
T: git git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git
F: Documentation/virt/kvm/arm/
F: Documentation/virt/kvm/devices/arm*
F: arch/arm64/include/asm/kvm*
F: arch/arm64/include/uapi/asm/kvm*
F: arch/arm64/kvm/
......
arch/arm64/include/asm/esr.h
View file @ 2c9b3512
......@@ -160,6 +160,7 @@
#define ESR_ELx_Xs_MASK (GENMASK_ULL(4, 0))
/* ISS field definitions for exceptions taken in to Hyp */
#define ESR_ELx_FSC_ADDRSZ (0x00)
#define ESR_ELx_CV (UL(1) << 24)
#define ESR_ELx_COND_SHIFT (20)
#define ESR_ELx_COND_MASK (UL(0xF) << ESR_ELx_COND_SHIFT)
......@@ -387,6 +388,11 @@
#ifndef __ASSEMBLY__
#include <asm/types.h>
static inline unsigned long esr_brk_comment(unsigned long esr)
{
return esr & ESR_ELx_BRK64_ISS_COMMENT_MASK;
}
static inline bool esr_is_data_abort(unsigned long esr)
{
const unsigned long ec = ESR_ELx_EC(esr);
......@@ -394,6 +400,12 @@ static inline bool esr_is_data_abort(unsigned long esr)
return ec == ESR_ELx_EC_DABT_LOW || ec == ESR_ELx_EC_DABT_CUR;
}
static inline bool esr_is_cfi_brk(unsigned long esr)
{
return ESR_ELx_EC(esr) == ESR_ELx_EC_BRK64 &&
(esr_brk_comment(esr) & ~CFI_BRK_IMM_MASK) == CFI_BRK_IMM_BASE;
}
static inline bool esr_fsc_is_translation_fault(unsigned long esr)
{
esr = esr & ESR_ELx_FSC;
......
arch/arm64/include/asm/kvm_arm.h
View file @ 2c9b3512
......@@ -102,7 +102,6 @@
#define HCR_HOST_NVHE_PROTECTED_FLAGS (HCR_HOST_NVHE_FLAGS | HCR_TSC)
#define HCR_HOST_VHE_FLAGS (HCR_RW | HCR_TGE | HCR_E2H)
#define HCRX_GUEST_FLAGS (HCRX_EL2_SMPME | HCRX_EL2_TCR2En)
#define HCRX_HOST_FLAGS (HCRX_EL2_MSCEn | HCRX_EL2_TCR2En | HCRX_EL2_EnFPM)
/* TCR_EL2 Registers bits */
......
arch/arm64/include/asm/kvm_asm.h
View file @ 2c9b3512
......@@ -232,6 +232,8 @@ extern void __kvm_tlb_flush_vmid_range(struct kvm_s2_mmu *mmu,
phys_addr_t start, unsigned long pages);
extern void __kvm_tlb_flush_vmid(struct kvm_s2_mmu *mmu);
extern int __kvm_tlbi_s1e2(struct kvm_s2_mmu *mmu, u64 va, u64 sys_encoding);
extern void __kvm_timer_set_cntvoff(u64 cntvoff);
extern int __kvm_vcpu_run(struct kvm_vcpu *vcpu);
......
arch/arm64/include/asm/kvm_emulate.h
View file @ 2c9b3512
......@@ -11,6 +11,7 @@
#ifndef __ARM64_KVM_EMULATE_H__
#define __ARM64_KVM_EMULATE_H__
#include <linux/bitfield.h>
#include <linux/kvm_host.h>
#include <asm/debug-monitors.h>
......@@ -55,6 +56,14 @@ void kvm_emulate_nested_eret(struct kvm_vcpu *vcpu);
int kvm_inject_nested_sync(struct kvm_vcpu *vcpu, u64 esr_el2);
int kvm_inject_nested_irq(struct kvm_vcpu *vcpu);
static inline void kvm_inject_nested_sve_trap(struct kvm_vcpu *vcpu)
{
u64 esr = FIELD_PREP(ESR_ELx_EC_MASK, ESR_ELx_EC_SVE) |
ESR_ELx_IL;
kvm_inject_nested_sync(vcpu, esr);
}
#if defined(__KVM_VHE_HYPERVISOR__) || defined(__KVM_NVHE_HYPERVISOR__)
static __always_inline bool vcpu_el1_is_32bit(struct kvm_vcpu *vcpu)
{
......@@ -69,39 +78,17 @@ static __always_inline bool vcpu_el1_is_32bit(struct kvm_vcpu *vcpu)
static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu)
{
vcpu->arch.hcr_el2 = HCR_GUEST_FLAGS;
if (has_vhe() || has_hvhe())
vcpu->arch.hcr_el2 |= HCR_E2H;
if (cpus_have_final_cap(ARM64_HAS_RAS_EXTN)) {
/* route synchronous external abort exceptions to EL2 */
vcpu->arch.hcr_el2 |= HCR_TEA;
/* trap error record accesses */
vcpu->arch.hcr_el2 |= HCR_TERR;
}
if (!vcpu_has_run_once(vcpu))
vcpu->arch.hcr_el2 = HCR_GUEST_FLAGS;
if (cpus_have_final_cap(ARM64_HAS_STAGE2_FWB)) {
vcpu->arch.hcr_el2 |= HCR_FWB;
} else {
/*
* For non-FWB CPUs, we trap VM ops (HCR_EL2.TVM) until M+C
* get set in SCTLR_EL1 such that we can detect when the guest
* MMU gets turned on and do the necessary cache maintenance
* then.
*/
/*
* For non-FWB CPUs, we trap VM ops (HCR_EL2.TVM) until M+C
* get set in SCTLR_EL1 such that we can detect when the guest
* MMU gets turned on and do the necessary cache maintenance
* then.
*/
if (!cpus_have_final_cap(ARM64_HAS_STAGE2_FWB))
vcpu->arch.hcr_el2 |= HCR_TVM;
}
if (cpus_have_final_cap(ARM64_HAS_EVT) &&
!cpus_have_final_cap(ARM64_MISMATCHED_CACHE_TYPE))
vcpu->arch.hcr_el2 |= HCR_TID4;
else
vcpu->arch.hcr_el2 |= HCR_TID2;
if (vcpu_el1_is_32bit(vcpu))
vcpu->arch.hcr_el2 &= ~HCR_RW;
if (kvm_has_mte(vcpu->kvm))
vcpu->arch.hcr_el2 |= HCR_ATA;
}
static inline unsigned long *vcpu_hcr(struct kvm_vcpu *vcpu)
......@@ -660,4 +647,50 @@ static __always_inline void kvm_reset_cptr_el2(struct kvm_vcpu *vcpu)
kvm_write_cptr_el2(val);
}
/*
* Returns a 'sanitised' view of CPTR_EL2, translating from nVHE to the VHE
* format if E2H isn't set.
*/
static inline u64 vcpu_sanitised_cptr_el2(const struct kvm_vcpu *vcpu)
{
u64 cptr = __vcpu_sys_reg(vcpu, CPTR_EL2);
if (!vcpu_el2_e2h_is_set(vcpu))
cptr = translate_cptr_el2_to_cpacr_el1(cptr);
return cptr;
}
static inline bool ____cptr_xen_trap_enabled(const struct kvm_vcpu *vcpu,
unsigned int xen)
{
switch (xen) {
case 0b00:
case 0b10:
return true;
case 0b01:
return vcpu_el2_tge_is_set(vcpu) && !vcpu_is_el2(vcpu);
case 0b11:
default:
return false;
}
}
#define __guest_hyp_cptr_xen_trap_enabled(vcpu, xen) \
(!vcpu_has_nv(vcpu) ? false : \
____cptr_xen_trap_enabled(vcpu, \
SYS_FIELD_GET(CPACR_ELx, xen, \
vcpu_sanitised_cptr_el2(vcpu))))
static inline bool guest_hyp_fpsimd_traps_enabled(const struct kvm_vcpu *vcpu)
{
return __guest_hyp_cptr_xen_trap_enabled(vcpu, FPEN);
}
static inline bool guest_hyp_sve_traps_enabled(const struct kvm_vcpu *vcpu)
{
return __guest_hyp_cptr_xen_trap_enabled(vcpu, ZEN);
}
#endif /* __ARM64_KVM_EMULATE_H__ */
arch/arm64/include/asm/kvm_host.h
View file @ 2c9b3512
......@@ -189,6 +189,33 @@ struct kvm_s2_mmu {
uint64_t split_page_chunk_size;
struct kvm_arch *arch;
/*
* For a shadow stage-2 MMU, the virtual vttbr used by the
* host to parse the guest S2.
* This either contains:
* - the virtual VTTBR programmed by the guest hypervisor with
* CnP cleared
* - The value 1 (VMID=0, BADDR=0, CnP=1) if invalid
*
* We also cache the full VTCR which gets used for TLB invalidation,
* taking the ARM ARM's "Any of the bits in VTCR_EL2 are permitted
* to be cached in a TLB" to the letter.
*/
u64 tlb_vttbr;
u64 tlb_vtcr;
/*
* true when this represents a nested context where virtual
* HCR_EL2.VM == 1
*/
bool nested_stage2_enabled;
/*
* 0: Nobody is currently using this, check vttbr for validity
* >0: Somebody is actively using this.
*/
atomic_t refcnt;
};
struct kvm_arch_memory_slot {
......@@ -256,6 +283,14 @@ struct kvm_arch {
*/
u64 fgu[__NR_FGT_GROUP_IDS__];
/*
* Stage 2 paging state for VMs with nested S2 using a virtual
* VMID.
*/
struct kvm_s2_mmu *nested_mmus;
size_t nested_mmus_size;
int nested_mmus_next;
/* Interrupt controller */
struct vgic_dist vgic;
......@@ -327,11 +362,11 @@ struct kvm_arch {
* Atomic access to multiple idregs are guarded by kvm_arch.config_lock.
*/
#define IDREG_IDX(id) (((sys_reg_CRm(id) - 1) << 3) | sys_reg_Op2(id))
#define IDX_IDREG(idx) sys_reg(3, 0, 0, ((idx) >> 3) + 1, (idx) & Op2_mask)
#define IDREG(kvm, id) ((kvm)->arch.id_regs[IDREG_IDX(id)])
#define KVM_ARM_ID_REG_NUM (IDREG_IDX(sys_reg(3, 0, 0, 7, 7)) + 1)
u64 id_regs[KVM_ARM_ID_REG_NUM];
u64 ctr_el0;
/* Masks for VNCR-baked sysregs */
struct kvm_sysreg_masks *sysreg_masks;
......@@ -423,6 +458,7 @@ enum vcpu_sysreg {
MDCR_EL2, /* Monitor Debug Configuration Register (EL2) */
CPTR_EL2, /* Architectural Feature Trap Register (EL2) */
HACR_EL2, /* Hypervisor Auxiliary Control Register */
ZCR_EL2, /* SVE Control Register (EL2) */
TTBR0_EL2, /* Translation Table Base Register 0 (EL2) */
TTBR1_EL2, /* Translation Table Base Register 1 (EL2) */
TCR_EL2, /* Translation Control Register (EL2) */
......@@ -867,6 +903,9 @@ struct kvm_vcpu_arch {
#define vcpu_sve_max_vq(vcpu) sve_vq_from_vl((vcpu)->arch.sve_max_vl)
#define vcpu_sve_zcr_elx(vcpu) \
(unlikely(is_hyp_ctxt(vcpu)) ? ZCR_EL2 : ZCR_EL1)
#define vcpu_sve_state_size(vcpu) ({ \
size_t __size_ret; \
unsigned int __vcpu_vq; \
......@@ -991,6 +1030,7 @@ static inline bool __vcpu_read_sys_reg_from_cpu(int reg, u64 *val)
case DACR32_EL2: *val = read_sysreg_s(SYS_DACR32_EL2); break;
case IFSR32_EL2: *val = read_sysreg_s(SYS_IFSR32_EL2); break;
case DBGVCR32_EL2: *val = read_sysreg_s(SYS_DBGVCR32_EL2); break;
case ZCR_EL1: *val = read_sysreg_s(SYS_ZCR_EL12); break;
default: return false;
}
......@@ -1036,6 +1076,7 @@ static inline bool __vcpu_write_sys_reg_to_cpu(u64 val, int reg)
case DACR32_EL2: write_sysreg_s(val, SYS_DACR32_EL2); break;
case IFSR32_EL2: write_sysreg_s(val, SYS_IFSR32_EL2); break;
case DBGVCR32_EL2: write_sysreg_s(val, SYS_DBGVCR32_EL2); break;
case ZCR_EL1: write_sysreg_s(val, SYS_ZCR_EL12); break;
default: return false;
}
......@@ -1145,7 +1186,7 @@ int __init populate_nv_trap_config(void);
bool lock_all_vcpus(struct kvm *kvm);
void unlock_all_vcpus(struct kvm *kvm);
void kvm_init_sysreg(struct kvm_vcpu *);
void kvm_calculate_traps(struct kvm_vcpu *vcpu);
/* MMIO helpers */
void kvm_mmio_write_buf(void *buf, unsigned int len, unsigned long data);
......@@ -1248,7 +1289,6 @@ static inline bool kvm_system_needs_idmapped_vectors(void)
}
static inline void kvm_arch_sync_events(struct kvm *kvm) {}
static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
void kvm_arm_init_debug(void);
void kvm_arm_vcpu_init_debug(struct kvm_vcpu *vcpu);
......@@ -1306,6 +1346,7 @@ void kvm_vcpu_load_vhe(struct kvm_vcpu *vcpu);
void kvm_vcpu_put_vhe(struct kvm_vcpu *vcpu);
int __init kvm_set_ipa_limit(void);
u32 kvm_get_pa_bits(struct kvm *kvm);
#define __KVM_HAVE_ARCH_VM_ALLOC
struct kvm *kvm_arch_alloc_vm(void);
......@@ -1355,6 +1396,24 @@ static inline void kvm_hyp_reserve(void) { }
void kvm_arm_vcpu_power_off(struct kvm_vcpu *vcpu);
bool kvm_arm_vcpu_stopped(struct kvm_vcpu *vcpu);
static inline u64 *__vm_id_reg(struct kvm_arch *ka, u32 reg)
{
switch (reg) {
case sys_reg(3, 0, 0, 1, 0) ... sys_reg(3, 0, 0, 7, 7):
return &ka->id_regs[IDREG_IDX(reg)];
case SYS_CTR_EL0:
return &ka->ctr_el0;
default:
WARN_ON_ONCE(1);
return NULL;
}
}
#define kvm_read_vm_id_reg(kvm, reg) \
({ u64 __val = *__vm_id_reg(&(kvm)->arch, reg); __val; })
void kvm_set_vm_id_reg(struct kvm *kvm, u32 reg, u64 val);
#define __expand_field_sign_unsigned(id, fld, val) \
((u64)SYS_FIELD_VALUE(id, fld, val))
......@@ -1371,7 +1430,7 @@ bool kvm_arm_vcpu_stopped(struct kvm_vcpu *vcpu);
#define get_idreg_field_unsigned(kvm, id, fld) \
({ \
u64 __val = IDREG((kvm), SYS_##id); \
u64 __val = kvm_read_vm_id_reg((kvm), SYS_##id); \
FIELD_GET(id##_##fld##_MASK, __val); \
})
......
arch/arm64/include/asm/kvm_hyp.h
View file @ 2c9b3512
......@@ -124,8 +124,8 @@ void __noreturn __hyp_do_panic(struct kvm_cpu_context *host_ctxt, u64 spsr,
#endif
#ifdef __KVM_NVHE_HYPERVISOR__
void __pkvm_init_switch_pgd(phys_addr_t phys, unsigned long size,
phys_addr_t pgd, void *sp, void *cont_fn);
void __pkvm_init_switch_pgd(phys_addr_t pgd, unsigned long sp,
void (*fn)(void));
int __pkvm_init(phys_addr_t phys, unsigned long size, unsigned long nr_cpus,
unsigned long *per_cpu_base, u32 hyp_va_bits);
void __noreturn __host_enter(struct kvm_cpu_context *host_ctxt);
......
arch/arm64/include/asm/kvm_mmu.h
View file @ 2c9b3512
......@@ -98,6 +98,7 @@ alternative_cb_end
#include <asm/mmu_context.h>
#include <asm/kvm_emulate.h>
#include <asm/kvm_host.h>
#include <asm/kvm_nested.h>
void kvm_update_va_mask(struct alt_instr *alt,
__le32 *origptr, __le32 *updptr, int nr_inst);
......@@ -165,6 +166,10 @@ int create_hyp_exec_mappings(phys_addr_t phys_addr, size_t size,
int create_hyp_stack(phys_addr_t phys_addr, unsigned long *haddr);
void __init free_hyp_pgds(void);
void kvm_stage2_unmap_range(struct kvm_s2_mmu *mmu, phys_addr_t start, u64 size);
void kvm_stage2_flush_range(struct kvm_s2_mmu *mmu, phys_addr_t addr, phys_addr_t end);
void kvm_stage2_wp_range(struct kvm_s2_mmu *mmu, phys_addr_t addr, phys_addr_t end);
void stage2_unmap_vm(struct kvm *kvm);
int kvm_init_stage2_mmu(struct kvm *kvm, struct kvm_s2_mmu *mmu, unsigned long type);
void kvm_uninit_stage2_mmu(struct kvm *kvm);
......@@ -326,5 +331,26 @@ static inline struct kvm *kvm_s2_mmu_to_kvm(struct kvm_s2_mmu *mmu)
{
return container_of(mmu->arch, struct kvm, arch);
}
static inline u64 get_vmid(u64 vttbr)
{
return (vttbr & VTTBR_VMID_MASK(kvm_get_vmid_bits())) >>
VTTBR_VMID_SHIFT;
}
static inline bool kvm_s2_mmu_valid(struct kvm_s2_mmu *mmu)
{
return !(mmu->tlb_vttbr & VTTBR_CNP_BIT);
}
static inline bool kvm_is_nested_s2_mmu(struct kvm *kvm, struct kvm_s2_mmu *mmu)
{
/*
* Be careful, mmu may not be fully initialised so do look at
* *any* of its fields.
*/
return &kvm->arch.mmu != mmu;
}
#endif /* __ASSEMBLY__ */
#endif /* __ARM64_KVM_MMU_H__ */
arch/arm64/include/asm/kvm_nested.h
View file @ 2c9b3512
......@@ -5,6 +5,7 @@
#include <linux/bitfield.h>
#include <linux/kvm_host.h>
#include <asm/kvm_emulate.h>
#include <asm/kvm_pgtable.h>
static inline bool vcpu_has_nv(const struct kvm_vcpu *vcpu)
{
......@@ -32,7 +33,7 @@ static inline u64 translate_tcr_el2_to_tcr_el1(u64 tcr)
static inline u64 translate_cptr_el2_to_cpacr_el1(u64 cptr_el2)
{
u64 cpacr_el1 = 0;
u64 cpacr_el1 = CPACR_ELx_RES1;
if (cptr_el2 & CPTR_EL2_TTA)
cpacr_el1 |= CPACR_ELx_TTA;
......@@ -41,6 +42,8 @@ static inline u64 translate_cptr_el2_to_cpacr_el1(u64 cptr_el2)
if (!(cptr_el2 & CPTR_EL2_TZ))
cpacr_el1 |= CPACR_ELx_ZEN;
cpacr_el1 |= cptr_el2 & (CPTR_EL2_TCPAC | CPTR_EL2_TAM);
return cpacr_el1;
}
......@@ -61,6 +64,125 @@ static inline u64 translate_ttbr0_el2_to_ttbr0_el1(u64 ttbr0)
}
extern bool forward_smc_trap(struct kvm_vcpu *vcpu);
extern void kvm_init_nested(struct kvm *kvm);
extern int kvm_vcpu_init_nested(struct kvm_vcpu *vcpu);
extern void kvm_init_nested_s2_mmu(struct kvm_s2_mmu *mmu);
extern struct kvm_s2_mmu *lookup_s2_mmu(struct kvm_vcpu *vcpu);
union tlbi_info;
extern void kvm_s2_mmu_iterate_by_vmid(struct kvm *kvm, u16 vmid,
const union tlbi_info *info,
void (*)(struct kvm_s2_mmu *,
const union tlbi_info *));
extern void kvm_vcpu_load_hw_mmu(struct kvm_vcpu *vcpu);
extern void kvm_vcpu_put_hw_mmu(struct kvm_vcpu *vcpu);
struct kvm_s2_trans {
phys_addr_t output;
unsigned long block_size;
bool writable;
bool readable;
int level;
u32 esr;
u64 upper_attr;
};
static inline phys_addr_t kvm_s2_trans_output(struct kvm_s2_trans *trans)
{
return trans->output;
}
static inline unsigned long kvm_s2_trans_size(struct kvm_s2_trans *trans)
{
return trans->block_size;
}
static inline u32 kvm_s2_trans_esr(struct kvm_s2_trans *trans)
{
return trans->esr;
}
static inline bool kvm_s2_trans_readable(struct kvm_s2_trans *trans)
{
return trans->readable;
}
static inline bool kvm_s2_trans_writable(struct kvm_s2_trans *trans)
{
return trans->writable;
}
static inline bool kvm_s2_trans_executable(struct kvm_s2_trans *trans)
{
return !(trans->upper_attr & BIT(54));
}
extern int kvm_walk_nested_s2(struct kvm_vcpu *vcpu, phys_addr_t gipa,
struct kvm_s2_trans *result);
extern int kvm_s2_handle_perm_fault(struct kvm_vcpu *vcpu,
struct kvm_s2_trans *trans);
extern int kvm_inject_s2_fault(struct kvm_vcpu *vcpu, u64 esr_el2);
extern void kvm_nested_s2_wp(struct kvm *kvm);
extern void kvm_nested_s2_unmap(struct kvm *kvm);
extern void kvm_nested_s2_flush(struct kvm *kvm);
unsigned long compute_tlb_inval_range(struct kvm_s2_mmu *mmu, u64 val);
static inline bool kvm_supported_tlbi_s1e1_op(struct kvm_vcpu *vpcu, u32 instr)
{
struct kvm *kvm = vpcu->kvm;
u8 CRm = sys_reg_CRm(instr);
if (!(sys_reg_Op0(instr) == TLBI_Op0 &&
sys_reg_Op1(instr) == TLBI_Op1_EL1))
return false;
if (!(sys_reg_CRn(instr) == TLBI_CRn_XS ||
(sys_reg_CRn(instr) == TLBI_CRn_nXS &&
kvm_has_feat(kvm, ID_AA64ISAR1_EL1, XS, IMP))))
return false;
if (CRm == TLBI_CRm_nROS &&
!kvm_has_feat(kvm, ID_AA64ISAR0_EL1, TLB, OS))
return false;
if ((CRm == TLBI_CRm_RIS || CRm == TLBI_CRm_ROS ||
CRm == TLBI_CRm_RNS) &&
!kvm_has_feat(kvm, ID_AA64ISAR0_EL1, TLB, RANGE))
return false;
return true;
}
static inline bool kvm_supported_tlbi_s1e2_op(struct kvm_vcpu *vpcu, u32 instr)
{
struct kvm *kvm = vpcu->kvm;
u8 CRm = sys_reg_CRm(instr);
if (!(sys_reg_Op0(instr) == TLBI_Op0 &&
sys_reg_Op1(instr) == TLBI_Op1_EL2))
return false;
if (!(sys_reg_CRn(instr) == TLBI_CRn_XS ||
(sys_reg_CRn(instr) == TLBI_CRn_nXS &&
kvm_has_feat(kvm, ID_AA64ISAR1_EL1, XS, IMP))))
return false;
if (CRm == TLBI_CRm_IPAIS || CRm == TLBI_CRm_IPAONS)
return false;
if (CRm == TLBI_CRm_nROS &&
!kvm_has_feat(kvm, ID_AA64ISAR0_EL1, TLB, OS))
return false;
if ((CRm == TLBI_CRm_RIS || CRm == TLBI_CRm_ROS ||
CRm == TLBI_CRm_RNS) &&
!kvm_has_feat(kvm, ID_AA64ISAR0_EL1, TLB, RANGE))
return false;
return true;
}
int kvm_init_nv_sysregs(struct kvm *kvm);
......@@ -76,4 +198,11 @@ static inline bool kvm_auth_eretax(struct kvm_vcpu *vcpu, u64 *elr)
}
#endif
#define KVM_NV_GUEST_MAP_SZ (KVM_PGTABLE_PROT_SW1 | KVM_PGTABLE_PROT_SW0)
static inline u64 kvm_encode_nested_level(struct kvm_s2_trans *trans)
{
return FIELD_PREP(KVM_NV_GUEST_MAP_SZ, trans->level);
}
#endif /* __ARM64_KVM_NESTED_H */
arch/arm64/include/asm/sysreg.h
View file @ 2c9b3512
......@@ -654,6 +654,23 @@
#define OP_AT_S12E0W sys_insn(AT_Op0, 4, AT_CRn, 8, 7)
/* TLBI instructions */
#define TLBI_Op0 1
#define TLBI_Op1_EL1 0 /* Accessible from EL1 or higher */
#define TLBI_Op1_EL2 4 /* Accessible from EL2 or higher */
#define TLBI_CRn_XS 8 /* Extra Slow (the common one) */
#define TLBI_CRn_nXS 9 /* not Extra Slow (which nobody uses)*/
#define TLBI_CRm_IPAIS 0 /* S2 Inner-Shareable */
#define TLBI_CRm_nROS 1 /* non-Range, Outer-Sharable */
#define TLBI_CRm_RIS 2 /* Range, Inner-Sharable */
#define TLBI_CRm_nRIS 3 /* non-Range, Inner-Sharable */
#define TLBI_CRm_IPAONS 4 /* S2 Outer and Non-Shareable */
#define TLBI_CRm_ROS 5 /* Range, Outer-Sharable */
#define TLBI_CRm_RNS 6 /* Range, Non-Sharable */
#define TLBI_CRm_nRNS 7 /* non-Range, Non-Sharable */
#define OP_TLBI_VMALLE1OS sys_insn(1, 0, 8, 1, 0)
#define OP_TLBI_VAE1OS sys_insn(1, 0, 8, 1, 1)
#define OP_TLBI_ASIDE1OS sys_insn(1, 0, 8, 1, 2)
......
arch/arm64/kernel/asm-offsets.c
View file @ 2c9b3512
......@@ -128,6 +128,7 @@ int main(void)
DEFINE(VCPU_FAULT_DISR, offsetof(struct kvm_vcpu, arch.fault.disr_el1));
DEFINE(VCPU_HCR_EL2, offsetof(struct kvm_vcpu, arch.hcr_el2));
DEFINE(CPU_USER_PT_REGS, offsetof(struct kvm_cpu_context, regs));
DEFINE(CPU_ELR_EL2, offsetof(struct kvm_cpu_context, sys_regs[ELR_EL2]));
DEFINE(CPU_RGSR_EL1, offsetof(struct kvm_cpu_context, sys_regs[RGSR_EL1]));
DEFINE(CPU_GCR_EL1, offsetof(struct kvm_cpu_context, sys_regs[GCR_EL1]));
DEFINE(CPU_APIAKEYLO_EL1, offsetof(struct kvm_cpu_context, sys_regs[APIAKEYLO_EL1]));
......
arch/arm64/kernel/debug-monitors.c
View file @ 2c9b3512
......@@ -312,9 +312,7 @@ static int call_break_hook(struct pt_regs *regs, unsigned long esr)
* entirely not preemptible, and we can use rcu list safely here.
*/
list_for_each_entry_rcu(hook, list, node) {
unsigned long comment = esr & ESR_ELx_BRK64_ISS_COMMENT_MASK;
if ((comment & ~hook->mask) == hook->imm)
if ((esr_brk_comment(esr) & ~hook->mask) == hook->imm)
fn = hook->fn;
}
......
arch/arm64/kernel/traps.c
View file @ 2c9b3512
......@@ -1105,8 +1105,6 @@ static struct break_hook ubsan_break_hook = {
};
#endif
#define esr_comment(esr) ((esr) & ESR_ELx_BRK64_ISS_COMMENT_MASK)
/*
* Initial handler for AArch64 BRK exceptions
* This handler only used until debug_traps_init().
......@@ -1115,15 +1113,15 @@ int __init early_brk64(unsigned long addr, unsigned long esr,
struct pt_regs *regs)
{
#ifdef CONFIG_CFI_CLANG
if ((esr_comment(esr) & ~CFI_BRK_IMM_MASK) == CFI_BRK_IMM_BASE)
if (esr_is_cfi_brk(esr))
return cfi_handler(regs, esr) != DBG_HOOK_HANDLED;
#endif
#ifdef CONFIG_KASAN_SW_TAGS
if ((esr_comment(esr) & ~KASAN_BRK_MASK) == KASAN_BRK_IMM)
if ((esr_brk_comment(esr) & ~KASAN_BRK_MASK) == KASAN_BRK_IMM)
return kasan_handler(regs, esr) != DBG_HOOK_HANDLED;
#endif
#ifdef CONFIG_UBSAN_TRAP
if ((esr_comment(esr) & ~UBSAN_BRK_MASK) == UBSAN_BRK_IMM)
if ((esr_brk_comment(esr) & ~UBSAN_BRK_MASK) == UBSAN_BRK_IMM)
return ubsan_handler(regs, esr) != DBG_HOOK_HANDLED;
#endif
return bug_handler(regs, esr) != DBG_HOOK_HANDLED;
......
arch/arm64/kvm/arm.c
View file @ 2c9b3512
......@@ -48,6 +48,15 @@
static enum kvm_mode kvm_mode = KVM_MODE_DEFAULT;
enum kvm_wfx_trap_policy {
KVM_WFX_NOTRAP_SINGLE_TASK, /* Default option */
KVM_WFX_NOTRAP,
KVM_WFX_TRAP,
};
static enum kvm_wfx_trap_policy kvm_wfi_trap_policy __read_mostly = KVM_WFX_NOTRAP_SINGLE_TASK;
static enum kvm_wfx_trap_policy kvm_wfe_trap_policy __read_mostly = KVM_WFX_NOTRAP_SINGLE_TASK;
DECLARE_KVM_HYP_PER_CPU(unsigned long, kvm_hyp_vector);
DEFINE_PER_CPU(unsigned long, kvm_arm_hyp_stack_page);
......@@ -170,6 +179,8 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
mutex_unlock(&kvm->lock);
#endif
kvm_init_nested(kvm);
ret = kvm_share_hyp(kvm, kvm + 1);
if (ret)
return ret;
......@@ -546,11 +557,32 @@ static void vcpu_set_pauth_traps(struct kvm_vcpu *vcpu)
}
}
static bool kvm_vcpu_should_clear_twi(struct kvm_vcpu *vcpu)
{
if (unlikely(kvm_wfi_trap_policy != KVM_WFX_NOTRAP_SINGLE_TASK))
return kvm_wfi_trap_policy == KVM_WFX_NOTRAP;
return single_task_running() &&
(atomic_read(&vcpu->arch.vgic_cpu.vgic_v3.its_vpe.vlpi_count) ||
vcpu->kvm->arch.vgic.nassgireq);
}
static bool kvm_vcpu_should_clear_twe(struct kvm_vcpu *vcpu)
{
if (unlikely(kvm_wfe_trap_policy != KVM_WFX_NOTRAP_SINGLE_TASK))
return kvm_wfe_trap_policy == KVM_WFX_NOTRAP;
return single_task_running();
}
void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
struct kvm_s2_mmu *mmu;
int *last_ran;
if (vcpu_has_nv(vcpu))
kvm_vcpu_load_hw_mmu(vcpu);
mmu = vcpu->arch.hw_mmu;
last_ran = this_cpu_ptr(mmu->last_vcpu_ran);
......@@ -579,10 +611,15 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
if (kvm_arm_is_pvtime_enabled(&vcpu->arch))
kvm_make_request(KVM_REQ_RECORD_STEAL, vcpu);
if (single_task_running())
vcpu_clear_wfx_traps(vcpu);
if (kvm_vcpu_should_clear_twe(vcpu))
vcpu->arch.hcr_el2 &= ~HCR_TWE;
else
vcpu->arch.hcr_el2 |= HCR_TWE;
if (kvm_vcpu_should_clear_twi(vcpu))
vcpu->arch.hcr_el2 &= ~HCR_TWI;
else
vcpu_set_wfx_traps(vcpu);
vcpu->arch.hcr_el2 |= HCR_TWI;
vcpu_set_pauth_traps(vcpu);
......@@ -601,6 +638,8 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
kvm_timer_vcpu_put(vcpu);
kvm_vgic_put(vcpu);
kvm_vcpu_pmu_restore_host(vcpu);
if (vcpu_has_nv(vcpu))
kvm_vcpu_put_hw_mmu(vcpu);
kvm_arm_vmid_clear_active();
vcpu_clear_on_unsupported_cpu(vcpu);
......@@ -797,7 +836,7 @@ int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu)
* This needs to happen after NV has imposed its own restrictions on
* the feature set
*/
kvm_init_sysreg(vcpu);
kvm_calculate_traps(vcpu);
ret = kvm_timer_enable(vcpu);
if (ret)
......@@ -1099,7 +1138,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
vcpu_load(vcpu);
if (run->immediate_exit) {
if (!vcpu->wants_to_run) {
ret = -EINTR;
goto out;
}
......@@ -1419,11 +1458,6 @@ static int kvm_vcpu_init_check_features(struct kvm_vcpu *vcpu,
test_bit(KVM_ARM_VCPU_PTRAUTH_GENERIC, &features))
return -EINVAL;
/* Disallow NV+SVE for the time being */
if (test_bit(KVM_ARM_VCPU_HAS_EL2, &features) &&
test_bit(KVM_ARM_VCPU_SVE, &features))
return -EINVAL;
if (!test_bit(KVM_ARM_VCPU_EL1_32BIT, &features))
return 0;
......@@ -1459,6 +1493,10 @@ static int kvm_setup_vcpu(struct kvm_vcpu *vcpu)
if (kvm_vcpu_has_pmu(vcpu) && !kvm->arch.arm_pmu)
ret = kvm_arm_set_default_pmu(kvm);
/* Prepare for nested if required */
if (!ret && vcpu_has_nv(vcpu))
ret = kvm_vcpu_init_nested(vcpu);
return ret;
}
......@@ -2858,6 +2896,36 @@ static int __init early_kvm_mode_cfg(char *arg)
}
early_param("kvm-arm.mode", early_kvm_mode_cfg);
static int __init early_kvm_wfx_trap_policy_cfg(char *arg, enum kvm_wfx_trap_policy *p)
{
if (!arg)
return -EINVAL;
if (strcmp(arg, "trap") == 0) {
*p = KVM_WFX_TRAP;
return 0;
}
if (strcmp(arg, "notrap") == 0) {
*p = KVM_WFX_NOTRAP;
return 0;
}
return -EINVAL;
}
static int __init early_kvm_wfi_trap_policy_cfg(char *arg)
{
return early_kvm_wfx_trap_policy_cfg(arg, &kvm_wfi_trap_policy);
}
early_param("kvm-arm.wfi_trap_policy", early_kvm_wfi_trap_policy_cfg);
static int __init early_kvm_wfe_trap_policy_cfg(char *arg)
{
return early_kvm_wfx_trap_policy_cfg(arg, &kvm_wfe_trap_policy);
}
early_param("kvm-arm.wfe_trap_policy", early_kvm_wfe_trap_policy_cfg);
enum kvm_mode kvm_get_mode(void)
{
return kvm_mode;
......
arch/arm64/kvm/emulate-nested.c
View file @ 2c9b3512
......@@ -79,6 +79,12 @@ enum cgt_group_id {
CGT_MDCR_E2TB,
CGT_MDCR_TDCC,
CGT_CPACR_E0POE,
CGT_CPTR_TAM,
CGT_CPTR_TCPAC,
CGT_HCRX_TCR2En,
/*
* Anything after this point is a combination of coarse trap
* controls, which must all be evaluated to decide what to do.
......@@ -89,6 +95,7 @@ enum cgt_group_id {
CGT_HCR_TTLB_TTLBIS,
CGT_HCR_TTLB_TTLBOS,
CGT_HCR_TVM_TRVM,
CGT_HCR_TVM_TRVM_HCRX_TCR2En,
CGT_HCR_TPU_TICAB,
CGT_HCR_TPU_TOCU,
CGT_HCR_NV1_nNV2_ENSCXT,
......@@ -106,6 +113,8 @@ enum cgt_group_id {
CGT_CNTHCTL_EL1PCTEN = __COMPLEX_CONDITIONS__,
CGT_CNTHCTL_EL1PTEN,
CGT_CPTR_TTA,
/* Must be last */
__NR_CGT_GROUP_IDS__
};
......@@ -345,6 +354,30 @@ static const struct trap_bits coarse_trap_bits[] = {
.mask = MDCR_EL2_TDCC,
.behaviour = BEHAVE_FORWARD_ANY,
},
[CGT_CPACR_E0POE] = {
.index = CPTR_EL2,
.value = CPACR_ELx_E0POE,
.mask = CPACR_ELx_E0POE,
.behaviour = BEHAVE_FORWARD_ANY,
},
[CGT_CPTR_TAM] = {
.index = CPTR_EL2,
.value = CPTR_EL2_TAM,
.mask = CPTR_EL2_TAM,
.behaviour = BEHAVE_FORWARD_ANY,
},
[CGT_CPTR_TCPAC] = {
.index = CPTR_EL2,
.value = CPTR_EL2_TCPAC,
.mask = CPTR_EL2_TCPAC,
.behaviour = BEHAVE_FORWARD_ANY,
},
[CGT_HCRX_TCR2En] = {
.index = HCRX_EL2,
.value = 0,
.mask = HCRX_EL2_TCR2En,
.behaviour = BEHAVE_FORWARD_ANY,
},
};
#define MCB(id, ...) \
......@@ -359,6 +392,8 @@ static const enum cgt_group_id *coarse_control_combo[] = {
MCB(CGT_HCR_TTLB_TTLBIS, CGT_HCR_TTLB, CGT_HCR_TTLBIS),
MCB(CGT_HCR_TTLB_TTLBOS, CGT_HCR_TTLB, CGT_HCR_TTLBOS),
MCB(CGT_HCR_TVM_TRVM, CGT_HCR_TVM, CGT_HCR_TRVM),
MCB(CGT_HCR_TVM_TRVM_HCRX_TCR2En,
CGT_HCR_TVM, CGT_HCR_TRVM, CGT_HCRX_TCR2En),
MCB(CGT_HCR_TPU_TICAB, CGT_HCR_TPU, CGT_HCR_TICAB),
MCB(CGT_HCR_TPU_TOCU, CGT_HCR_TPU, CGT_HCR_TOCU),
MCB(CGT_HCR_NV1_nNV2_ENSCXT, CGT_HCR_NV1_nNV2, CGT_HCR_ENSCXT),
......@@ -410,12 +445,26 @@ static enum trap_behaviour check_cnthctl_el1pten(struct kvm_vcpu *vcpu)
return BEHAVE_FORWARD_ANY;
}
static enum trap_behaviour check_cptr_tta(struct kvm_vcpu *vcpu)
{
u64 val = __vcpu_sys_reg(vcpu, CPTR_EL2);
if (!vcpu_el2_e2h_is_set(vcpu))
val = translate_cptr_el2_to_cpacr_el1(val);
if (val & CPACR_ELx_TTA)
return BEHAVE_FORWARD_ANY;
return BEHAVE_HANDLE_LOCALLY;
}
#define CCC(id, fn) \
[id - __COMPLEX_CONDITIONS__] = fn
static const complex_condition_check ccc[] = {
CCC(CGT_CNTHCTL_EL1PCTEN, check_cnthctl_el1pcten),
CCC(CGT_CNTHCTL_EL1PTEN, check_cnthctl_el1pten),
CCC(CGT_CPTR_TTA, check_cptr_tta),
};
/*
......@@ -622,6 +671,7 @@ static const struct encoding_to_trap_config encoding_to_cgt[] __initconst = {
SR_TRAP(SYS_MAIR_EL1, CGT_HCR_TVM_TRVM),
SR_TRAP(SYS_AMAIR_EL1, CGT_HCR_TVM_TRVM),
SR_TRAP(SYS_CONTEXTIDR_EL1, CGT_HCR_TVM_TRVM),
SR_TRAP(SYS_TCR2_EL1, CGT_HCR_TVM_TRVM_HCRX_TCR2En),
SR_TRAP(SYS_DC_ZVA, CGT_HCR_TDZ),
SR_TRAP(SYS_DC_GVA, CGT_HCR_TDZ),
SR_TRAP(SYS_DC_GZVA, CGT_HCR_TDZ),
......@@ -1000,6 +1050,59 @@ static const struct encoding_to_trap_config encoding_to_cgt[] __initconst = {
SR_TRAP(SYS_TRBPTR_EL1, CGT_MDCR_E2TB),
SR_TRAP(SYS_TRBSR_EL1, CGT_MDCR_E2TB),
SR_TRAP(SYS_TRBTRG_EL1, CGT_MDCR_E2TB),
SR_TRAP(SYS_CPACR_EL1, CGT_CPTR_TCPAC),
SR_TRAP(SYS_AMUSERENR_EL0, CGT_CPTR_TAM),
SR_TRAP(SYS_AMCFGR_EL0, CGT_CPTR_TAM),
SR_TRAP(SYS_AMCGCR_EL0, CGT_CPTR_TAM),
SR_TRAP(SYS_AMCNTENCLR0_EL0, CGT_CPTR_TAM),
SR_TRAP(SYS_AMCNTENCLR1_EL0, CGT_CPTR_TAM),
SR_TRAP(SYS_AMCNTENSET0_EL0, CGT_CPTR_TAM),
SR_TRAP(SYS_AMCNTENSET1_EL0, CGT_CPTR_TAM),
SR_TRAP(SYS_AMCR_EL0, CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVCNTR0_EL0(0), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVCNTR0_EL0(1), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVCNTR0_EL0(2), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVCNTR0_EL0(3), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVCNTR1_EL0(0), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVCNTR1_EL0(1), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVCNTR1_EL0(2), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVCNTR1_EL0(3), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVCNTR1_EL0(4), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVCNTR1_EL0(5), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVCNTR1_EL0(6), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVCNTR1_EL0(7), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVCNTR1_EL0(8), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVCNTR1_EL0(9), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVCNTR1_EL0(10), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVCNTR1_EL0(11), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVCNTR1_EL0(12), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVCNTR1_EL0(13), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVCNTR1_EL0(14), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVCNTR1_EL0(15), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVTYPER0_EL0(0), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVTYPER0_EL0(1), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVTYPER0_EL0(2), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVTYPER0_EL0(3), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVTYPER1_EL0(0), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVTYPER1_EL0(1), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVTYPER1_EL0(2), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVTYPER1_EL0(3), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVTYPER1_EL0(4), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVTYPER1_EL0(5), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVTYPER1_EL0(6), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVTYPER1_EL0(7), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVTYPER1_EL0(8), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVTYPER1_EL0(9), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVTYPER1_EL0(10), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVTYPER1_EL0(11), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVTYPER1_EL0(12), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVTYPER1_EL0(13), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVTYPER1_EL0(14), CGT_CPTR_TAM),
SR_TRAP(SYS_AMEVTYPER1_EL0(15), CGT_CPTR_TAM),
SR_TRAP(SYS_POR_EL0, CGT_CPACR_E0POE),
/* op0=2, op1=1, and CRn<0b1000 */
SR_RANGE_TRAP(sys_reg(2, 1, 0, 0, 0),
sys_reg(2, 1, 7, 15, 7), CGT_CPTR_TTA),
SR_TRAP(SYS_CNTP_TVAL_EL0, CGT_CNTHCTL_EL1PTEN),
SR_TRAP(SYS_CNTP_CVAL_EL0, CGT_CNTHCTL_EL1PTEN),
SR_TRAP(SYS_CNTP_CTL_EL0, CGT_CNTHCTL_EL1PTEN),
......@@ -1071,6 +1174,7 @@ static const struct encoding_to_trap_config encoding_to_fgt[] __initconst = {
SR_FGT(SYS_TPIDRRO_EL0, HFGxTR, TPIDRRO_EL0, 1),
SR_FGT(SYS_TPIDR_EL1, HFGxTR, TPIDR_EL1, 1),
SR_FGT(SYS_TCR_EL1, HFGxTR, TCR_EL1, 1),
SR_FGT(SYS_TCR2_EL1, HFGxTR, TCR_EL1, 1),
SR_FGT(SYS_SCXTNUM_EL0, HFGxTR, SCXTNUM_EL0, 1),
SR_FGT(SYS_SCXTNUM_EL1, HFGxTR, SCXTNUM_EL1, 1),
SR_FGT(SYS_SCTLR_EL1, HFGxTR, SCTLR_EL1, 1),
......
arch/arm64/kvm/fpsimd.c
View file @ 2c9b3512
......@@ -178,7 +178,13 @@ void kvm_arch_vcpu_put_fp(struct kvm_vcpu *vcpu)
if (guest_owns_fp_regs()) {
if (vcpu_has_sve(vcpu)) {
__vcpu_sys_reg(vcpu, ZCR_EL1) = read_sysreg_el1(SYS_ZCR);
u64 zcr = read_sysreg_el1(SYS_ZCR);
/*
* If the vCPU is in the hyp context then ZCR_EL1 is
* loaded with its vEL2 counterpart.
*/
__vcpu_sys_reg(vcpu, vcpu_sve_zcr_elx(vcpu)) = zcr;
/*
* Restore the VL that was saved when bound to the CPU,
......@@ -189,11 +195,14 @@ void kvm_arch_vcpu_put_fp(struct kvm_vcpu *vcpu)
* Note that this means that at guest exit ZCR_EL1 is
* not necessarily the same as on guest entry.
*
* Restoring the VL isn't needed in VHE mode since
* ZCR_EL2 (accessed via ZCR_EL1) would fulfill the same
* role when doing the save from EL2.
* ZCR_EL2 holds the guest hypervisor's VL when running
* a nested guest, which could be smaller than the
* max for the vCPU. Similar to above, we first need to
* switch to a VL consistent with the layout of the
* vCPU's SVE state. KVM support for NV implies VHE, so
* using the ZCR_EL1 alias is safe.
*/
if (!has_vhe())
if (!has_vhe() || (vcpu_has_nv(vcpu) && !is_hyp_ctxt(vcpu)))
sve_cond_update_zcr_vq(vcpu_sve_max_vq(vcpu) - 1,
SYS_ZCR_EL1);
}
......
arch/arm64/kvm/handle_exit.c
View file @ 2c9b3512
......@@ -94,11 +94,19 @@ static int handle_smc(struct kvm_vcpu *vcpu)
}
/*
* Guest access to FP/ASIMD registers are routed to this handler only
* when the system doesn't support FP/ASIMD.
* This handles the cases where the system does not support FP/ASIMD or when
* we are running nested virtualization and the guest hypervisor is trapping
* FP/ASIMD accesses by its guest guest.
*
* All other handling of guest vs. host FP/ASIMD register state is handled in
* fixup_guest_exit().
*/
static int handle_no_fpsimd(struct kvm_vcpu *vcpu)
static int kvm_handle_fpasimd(struct kvm_vcpu *vcpu)
{
if (guest_hyp_fpsimd_traps_enabled(vcpu))
return kvm_inject_nested_sync(vcpu, kvm_vcpu_get_esr(vcpu));
/* This is the case when the system doesn't support FP/ASIMD. */
kvm_inject_undefined(vcpu);
return 1;
}
......@@ -209,6 +217,9 @@ static int kvm_handle_unknown_ec(struct kvm_vcpu *vcpu)
*/
static int handle_sve(struct kvm_vcpu *vcpu)
{
if (guest_hyp_sve_traps_enabled(vcpu))
return kvm_inject_nested_sync(vcpu, kvm_vcpu_get_esr(vcpu));
kvm_inject_undefined(vcpu);
return 1;
}
......@@ -304,7 +315,7 @@ static exit_handle_fn arm_exit_handlers[] = {
[ESR_ELx_EC_BREAKPT_LOW]= kvm_handle_guest_debug,
[ESR_ELx_EC_BKPT32] = kvm_handle_guest_debug,
[ESR_ELx_EC_BRK64] = kvm_handle_guest_debug,
[ESR_ELx_EC_FP_ASIMD] = handle_no_fpsimd,
[ESR_ELx_EC_FP_ASIMD] = kvm_handle_fpasimd,
[ESR_ELx_EC_PAC] = kvm_handle_ptrauth,
};
......@@ -411,6 +422,20 @@ void handle_exit_early(struct kvm_vcpu *vcpu, int exception_index)
kvm_handle_guest_serror(vcpu, kvm_vcpu_get_esr(vcpu));
}
static void print_nvhe_hyp_panic(const char *name, u64 panic_addr)
{
kvm_err("nVHE hyp %s at: [<%016llx>] %pB!\n", name, panic_addr,
(void *)(panic_addr + kaslr_offset()));
}
static void kvm_nvhe_report_cfi_failure(u64 panic_addr)
{
print_nvhe_hyp_panic("CFI failure", panic_addr);
if (IS_ENABLED(CONFIG_CFI_PERMISSIVE))
kvm_err(" (CONFIG_CFI_PERMISSIVE ignored for hyp failures)\n");
}
void __noreturn __cold nvhe_hyp_panic_handler(u64 esr, u64 spsr,
u64 elr_virt, u64 elr_phys,
u64 par, uintptr_t vcpu,
......@@ -423,7 +448,7 @@ void __noreturn __cold nvhe_hyp_panic_handler(u64 esr, u64 spsr,
if (mode != PSR_MODE_EL2t && mode != PSR_MODE_EL2h) {
kvm_err("Invalid host exception to nVHE hyp!\n");
} else if (ESR_ELx_EC(esr) == ESR_ELx_EC_BRK64 &&
(esr & ESR_ELx_BRK64_ISS_COMMENT_MASK) == BUG_BRK_IMM) {
esr_brk_comment(esr) == BUG_BRK_IMM) {
const char *file = NULL;
unsigned int line = 0;
......@@ -439,11 +464,11 @@ void __noreturn __cold nvhe_hyp_panic_handler(u64 esr, u64 spsr,
if (file)
kvm_err("nVHE hyp BUG at: %s:%u!\n", file, line);
else
kvm_err("nVHE hyp BUG at: [<%016llx>] %pB!\n", panic_addr,
(void *)(panic_addr + kaslr_offset()));
print_nvhe_hyp_panic("BUG", panic_addr);
} else if (IS_ENABLED(CONFIG_CFI_CLANG) && esr_is_cfi_brk(esr)) {
kvm_nvhe_report_cfi_failure(panic_addr);
} else {
kvm_err("nVHE hyp panic at: [<%016llx>] %pB!\n", panic_addr,
(void *)(panic_addr + kaslr_offset()));
print_nvhe_hyp_panic("panic", panic_addr);
}
/* Dump the nVHE hypervisor backtrace */
......
arch/arm64/kvm/hyp/entry.S
View file @ 2c9b3512
......@@ -83,6 +83,14 @@ alternative_else_nop_endif
eret
sb
SYM_INNER_LABEL(__guest_exit_restore_elr_and_panic, SYM_L_GLOBAL)
// x2-x29,lr: vcpu regs
// vcpu x0-x1 on the stack
adr_this_cpu x0, kvm_hyp_ctxt, x1
ldr x0, [x0, #CPU_ELR_EL2]
msr elr_el2, x0
SYM_INNER_LABEL(__guest_exit_panic, SYM_L_GLOBAL)
// x2-x29,lr: vcpu regs
// vcpu x0-x1 on the stack
......
arch/arm64/kvm/hyp/include/hyp/switch.h
View file @ 2c9b3512
......@@ -314,11 +314,24 @@ static bool kvm_hyp_handle_mops(struct kvm_vcpu *vcpu, u64 *exit_code)
static inline void __hyp_sve_restore_guest(struct kvm_vcpu *vcpu)
{
/*
* The vCPU's saved SVE state layout always matches the max VL of the
* vCPU. Start off with the max VL so we can load the SVE state.
*/
sve_cond_update_zcr_vq(vcpu_sve_max_vq(vcpu) - 1, SYS_ZCR_EL2);
__sve_restore_state(vcpu_sve_pffr(vcpu),
&vcpu->arch.ctxt.fp_regs.fpsr,
true);
write_sysreg_el1(__vcpu_sys_reg(vcpu, ZCR_EL1), SYS_ZCR);
/*
* The effective VL for a VM could differ from the max VL when running a
* nested guest, as the guest hypervisor could select a smaller VL. Slap
* that into hardware before wrapping up.
*/
if (vcpu_has_nv(vcpu) && !is_hyp_ctxt(vcpu))
sve_cond_update_zcr_vq(__vcpu_sys_reg(vcpu, ZCR_EL2), SYS_ZCR_EL2);
write_sysreg_el1(__vcpu_sys_reg(vcpu, vcpu_sve_zcr_elx(vcpu)), SYS_ZCR);
}
static inline void __hyp_sve_save_host(void)
......@@ -354,10 +367,19 @@ static bool kvm_hyp_handle_fpsimd(struct kvm_vcpu *vcpu, u64 *exit_code)
/* Only handle traps the vCPU can support here: */
switch (esr_ec) {
case ESR_ELx_EC_FP_ASIMD:
/* Forward traps to the guest hypervisor as required */
if (guest_hyp_fpsimd_traps_enabled(vcpu))
return false;
break;
case ESR_ELx_EC_SYS64:
if (WARN_ON_ONCE(!is_hyp_ctxt(vcpu)))
return false;
fallthrough;
case ESR_ELx_EC_SVE:
if (!sve_guest)
return false;
if (guest_hyp_sve_traps_enabled(vcpu))
return false;
break;
default:
return false;
......@@ -693,7 +715,7 @@ static inline bool fixup_guest_exit(struct kvm_vcpu *vcpu, u64 *exit_code)
static inline void __kvm_unexpected_el2_exception(void)
{
extern char __guest_exit_panic[];
extern char __guest_exit_restore_elr_and_panic[];
unsigned long addr, fixup;
struct kvm_exception_table_entry *entry, *end;
unsigned long elr_el2 = read_sysreg(elr_el2);
......@@ -715,7 +737,8 @@ static inline void __kvm_unexpected_el2_exception(void)
}
/* Trigger a panic after restoring the hyp context. */
write_sysreg(__guest_exit_panic, elr_el2);
this_cpu_ptr(&kvm_hyp_ctxt)->sys_regs[ELR_EL2] = elr_el2;
write_sysreg(__guest_exit_restore_elr_and_panic, elr_el2);
}
#endif /* __ARM64_KVM_HYP_SWITCH_H__ */
arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h
View file @ 2c9b3512
......@@ -55,6 +55,17 @@ static inline bool ctxt_has_s1pie(struct kvm_cpu_context *ctxt)
return kvm_has_feat(kern_hyp_va(vcpu->kvm), ID_AA64MMFR3_EL1, S1PIE, IMP);
}
static inline bool ctxt_has_tcrx(struct kvm_cpu_context *ctxt)
{
struct kvm_vcpu *vcpu;
if (!cpus_have_final_cap(ARM64_HAS_TCR2))
return false;
vcpu = ctxt_to_vcpu(ctxt);
return kvm_has_feat(kern_hyp_va(vcpu->kvm), ID_AA64MMFR3_EL1, TCRX, IMP);
}
static inline void __sysreg_save_el1_state(struct kvm_cpu_context *ctxt)
{
ctxt_sys_reg(ctxt, SCTLR_EL1) = read_sysreg_el1(SYS_SCTLR);
......@@ -62,8 +73,14 @@ static inline void __sysreg_save_el1_state(struct kvm_cpu_context *ctxt)
ctxt_sys_reg(ctxt, TTBR0_EL1) = read_sysreg_el1(SYS_TTBR0);
ctxt_sys_reg(ctxt, TTBR1_EL1) = read_sysreg_el1(SYS_TTBR1);
ctxt_sys_reg(ctxt, TCR_EL1) = read_sysreg_el1(SYS_TCR);
if (cpus_have_final_cap(ARM64_HAS_TCR2))
if (ctxt_has_tcrx(ctxt)) {
ctxt_sys_reg(ctxt, TCR2_EL1) = read_sysreg_el1(SYS_TCR2);
if (ctxt_has_s1pie(ctxt)) {
ctxt_sys_reg(ctxt, PIR_EL1) = read_sysreg_el1(SYS_PIR);
ctxt_sys_reg(ctxt, PIRE0_EL1) = read_sysreg_el1(SYS_PIRE0);
}
}
ctxt_sys_reg(ctxt, ESR_EL1) = read_sysreg_el1(SYS_ESR);
ctxt_sys_reg(ctxt, AFSR0_EL1) = read_sysreg_el1(SYS_AFSR0);
ctxt_sys_reg(ctxt, AFSR1_EL1) = read_sysreg_el1(SYS_AFSR1);
......@@ -73,10 +90,6 @@ static inline void __sysreg_save_el1_state(struct kvm_cpu_context *ctxt)
ctxt_sys_reg(ctxt, CONTEXTIDR_EL1) = read_sysreg_el1(SYS_CONTEXTIDR);
ctxt_sys_reg(ctxt, AMAIR_EL1) = read_sysreg_el1(SYS_AMAIR);
ctxt_sys_reg(ctxt, CNTKCTL_EL1) = read_sysreg_el1(SYS_CNTKCTL);
if (ctxt_has_s1pie(ctxt)) {
ctxt_sys_reg(ctxt, PIR_EL1) = read_sysreg_el1(SYS_PIR);
ctxt_sys_reg(ctxt, PIRE0_EL1) = read_sysreg_el1(SYS_PIRE0);
}
ctxt_sys_reg(ctxt, PAR_EL1) = read_sysreg_par();
ctxt_sys_reg(ctxt, TPIDR_EL1) = read_sysreg(tpidr_el1);
......@@ -138,8 +151,14 @@ static inline void __sysreg_restore_el1_state(struct kvm_cpu_context *ctxt)
write_sysreg_el1(ctxt_sys_reg(ctxt, CPACR_EL1), SYS_CPACR);
write_sysreg_el1(ctxt_sys_reg(ctxt, TTBR0_EL1), SYS_TTBR0);
write_sysreg_el1(ctxt_sys_reg(ctxt, TTBR1_EL1), SYS_TTBR1);
if (cpus_have_final_cap(ARM64_HAS_TCR2))
if (ctxt_has_tcrx(ctxt)) {
write_sysreg_el1(ctxt_sys_reg(ctxt, TCR2_EL1), SYS_TCR2);
if (ctxt_has_s1pie(ctxt)) {
write_sysreg_el1(ctxt_sys_reg(ctxt, PIR_EL1), SYS_PIR);
write_sysreg_el1(ctxt_sys_reg(ctxt, PIRE0_EL1), SYS_PIRE0);
}
}
write_sysreg_el1(ctxt_sys_reg(ctxt, ESR_EL1), SYS_ESR);
write_sysreg_el1(ctxt_sys_reg(ctxt, AFSR0_EL1), SYS_AFSR0);
write_sysreg_el1(ctxt_sys_reg(ctxt, AFSR1_EL1), SYS_AFSR1);
......@@ -149,10 +168,6 @@ static inline void __sysreg_restore_el1_state(struct kvm_cpu_context *ctxt)
write_sysreg_el1(ctxt_sys_reg(ctxt, CONTEXTIDR_EL1), SYS_CONTEXTIDR);
write_sysreg_el1(ctxt_sys_reg(ctxt, AMAIR_EL1), SYS_AMAIR);
write_sysreg_el1(ctxt_sys_reg(ctxt, CNTKCTL_EL1), SYS_CNTKCTL);
if (ctxt_has_s1pie(ctxt)) {
write_sysreg_el1(ctxt_sys_reg(ctxt, PIR_EL1), SYS_PIR);
write_sysreg_el1(ctxt_sys_reg(ctxt, PIRE0_EL1), SYS_PIRE0);
}
write_sysreg(ctxt_sys_reg(ctxt, PAR_EL1), par_el1);
write_sysreg(ctxt_sys_reg(ctxt, TPIDR_EL1), tpidr_el1);
......
arch/arm64/kvm/hyp/include/nvhe/ffa.h
View file @ 2c9b3512
......@@ -9,7 +9,7 @@
#include <asm/kvm_host.h>
#define FFA_MIN_FUNC_NUM 0x60
#define FFA_MAX_FUNC_NUM 0x7F
#define FFA_MAX_FUNC_NUM 0xFF
int hyp_ffa_init(void *pages);
bool kvm_host_ffa_handler(struct kvm_cpu_context *host_ctxt, u32 func_id);
......
arch/arm64/kvm/hyp/nvhe/Makefile
View file @ 2c9b3512
......@@ -89,9 +89,9 @@ quiet_cmd_hyprel = HYPREL $@
quiet_cmd_hypcopy = HYPCOPY $@
cmd_hypcopy = $(OBJCOPY) --prefix-symbols=__kvm_nvhe_ $< $@
# Remove ftrace, Shadow Call Stack, and CFI CFLAGS.
# This is equivalent to the 'notrace', '__noscs', and '__nocfi' annotations.
KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS) $(CC_FLAGS_CFI), $(KBUILD_CFLAGS))
# Remove ftrace and Shadow Call Stack CFLAGS.
# This is equivalent to the 'notrace' and '__noscs' annotations.
KBUILD_CFLAGS := $(filter-out $(CC_FLAGS_FTRACE) $(CC_FLAGS_SCS), $(KBUILD_CFLAGS))
# Starting from 13.0.0 llvm emits SHT_REL section '.llvm.call-graph-profile'
# when profile optimization is applied. gen-hyprel does not support SHT_REL and
# causes a build failure. Remove profile optimization flags.
......
arch/arm64/kvm/hyp/nvhe/ffa.c
View file @ 2c9b3512
......@@ -67,6 +67,9 @@ struct kvm_ffa_buffers {
*/
static struct kvm_ffa_buffers hyp_buffers;
static struct kvm_ffa_buffers host_buffers;
static u32 hyp_ffa_version;
static bool has_version_negotiated;
static hyp_spinlock_t version_lock;
static void ffa_to_smccc_error(struct arm_smccc_res *res, u64 ffa_errno)
{
......@@ -462,7 +465,7 @@ static __always_inline void do_ffa_mem_xfer(const u64 func_id,
memcpy(buf, host_buffers.tx, fraglen);
ep_mem_access = (void *)buf +
ffa_mem_desc_offset(buf, 0, FFA_VERSION_1_0);
ffa_mem_desc_offset(buf, 0, hyp_ffa_version);
offset = ep_mem_access->composite_off;
if (!offset || buf->ep_count != 1 || buf->sender_id != HOST_FFA_ID) {
ret = FFA_RET_INVALID_PARAMETERS;
......@@ -541,7 +544,7 @@ static void do_ffa_mem_reclaim(struct arm_smccc_res *res,
fraglen = res->a2;
ep_mem_access = (void *)buf +
ffa_mem_desc_offset(buf, 0, FFA_VERSION_1_0);
ffa_mem_desc_offset(buf, 0, hyp_ffa_version);
offset = ep_mem_access->composite_off;
/*
* We can trust the SPMD to get this right, but let's at least
......@@ -651,6 +654,132 @@ static bool do_ffa_features(struct arm_smccc_res *res,
return true;
}
static int hyp_ffa_post_init(void)
{
size_t min_rxtx_sz;
struct arm_smccc_res res;
arm_smccc_1_1_smc(FFA_ID_GET, 0, 0, 0, 0, 0, 0, 0, &res);
if (res.a0 != FFA_SUCCESS)
return -EOPNOTSUPP;
if (res.a2 != HOST_FFA_ID)
return -EINVAL;
arm_smccc_1_1_smc(FFA_FEATURES, FFA_FN64_RXTX_MAP,
0, 0, 0, 0, 0, 0, &res);
if (res.a0 != FFA_SUCCESS)
return -EOPNOTSUPP;
switch (res.a2) {
case FFA_FEAT_RXTX_MIN_SZ_4K:
min_rxtx_sz = SZ_4K;
break;
case FFA_FEAT_RXTX_MIN_SZ_16K:
min_rxtx_sz = SZ_16K;
break;
case FFA_FEAT_RXTX_MIN_SZ_64K:
min_rxtx_sz = SZ_64K;
break;
default:
return -EINVAL;
}
if (min_rxtx_sz > PAGE_SIZE)
return -EOPNOTSUPP;
return 0;
}
static void do_ffa_version(struct arm_smccc_res *res,
struct kvm_cpu_context *ctxt)
{
DECLARE_REG(u32, ffa_req_version, ctxt, 1);
if (FFA_MAJOR_VERSION(ffa_req_version) != 1) {
res->a0 = FFA_RET_NOT_SUPPORTED;
return;
}
hyp_spin_lock(&version_lock);
if (has_version_negotiated) {
res->a0 = hyp_ffa_version;
goto unlock;
}
/*
* If the client driver tries to downgrade the version, we need to ask
* first if TEE supports it.
*/
if (FFA_MINOR_VERSION(ffa_req_version) < FFA_MINOR_VERSION(hyp_ffa_version)) {
arm_smccc_1_1_smc(FFA_VERSION, ffa_req_version, 0,
0, 0, 0, 0, 0,
res);
if (res->a0 == FFA_RET_NOT_SUPPORTED)
goto unlock;
hyp_ffa_version = ffa_req_version;
}
if (hyp_ffa_post_init())
res->a0 = FFA_RET_NOT_SUPPORTED;
else {
has_version_negotiated = true;
res->a0 = hyp_ffa_version;
}
unlock:
hyp_spin_unlock(&version_lock);
}
static void do_ffa_part_get(struct arm_smccc_res *res,
struct kvm_cpu_context *ctxt)
{
DECLARE_REG(u32, uuid0, ctxt, 1);
DECLARE_REG(u32, uuid1, ctxt, 2);
DECLARE_REG(u32, uuid2, ctxt, 3);
DECLARE_REG(u32, uuid3, ctxt, 4);
DECLARE_REG(u32, flags, ctxt, 5);
u32 count, partition_sz, copy_sz;
hyp_spin_lock(&host_buffers.lock);
if (!host_buffers.rx) {
ffa_to_smccc_res(res, FFA_RET_BUSY);
goto out_unlock;
}
arm_smccc_1_1_smc(FFA_PARTITION_INFO_GET, uuid0, uuid1,
uuid2, uuid3, flags, 0, 0,
res);
if (res->a0 != FFA_SUCCESS)
goto out_unlock;
count = res->a2;
if (!count)
goto out_unlock;
if (hyp_ffa_version > FFA_VERSION_1_0) {
/* Get the number of partitions deployed in the system */
if (flags & 0x1)
goto out_unlock;
partition_sz = res->a3;
} else {
/* FFA_VERSION_1_0 lacks the size in the response */
partition_sz = FFA_1_0_PARTITON_INFO_SZ;
}
copy_sz = partition_sz * count;
if (copy_sz > KVM_FFA_MBOX_NR_PAGES * PAGE_SIZE) {
ffa_to_smccc_res(res, FFA_RET_ABORTED);
goto out_unlock;
}
memcpy(host_buffers.rx, hyp_buffers.rx, copy_sz);
out_unlock:
hyp_spin_unlock(&host_buffers.lock);
}
bool kvm_host_ffa_handler(struct kvm_cpu_context *host_ctxt, u32 func_id)
{
struct arm_smccc_res res;
......@@ -671,6 +800,11 @@ bool kvm_host_ffa_handler(struct kvm_cpu_context *host_ctxt, u32 func_id)
if (!is_ffa_call(func_id))
return false;
if (!has_version_negotiated && func_id != FFA_VERSION) {
ffa_to_smccc_error(&res, FFA_RET_INVALID_PARAMETERS);
goto out_handled;
}
switch (func_id) {
case FFA_FEATURES:
if (!do_ffa_features(&res, host_ctxt))
......@@ -697,6 +831,12 @@ bool kvm_host_ffa_handler(struct kvm_cpu_context *host_ctxt, u32 func_id)
case FFA_MEM_FRAG_TX:
do_ffa_mem_frag_tx(&res, host_ctxt);
goto out_handled;
case FFA_VERSION:
do_ffa_version(&res, host_ctxt);
goto out_handled;
case FFA_PARTITION_INFO_GET:
do_ffa_part_get(&res, host_ctxt);
goto out_handled;
}
if (ffa_call_supported(func_id))
......@@ -711,13 +851,12 @@ bool kvm_host_ffa_handler(struct kvm_cpu_context *host_ctxt, u32 func_id)
int hyp_ffa_init(void *pages)
{
struct arm_smccc_res res;
size_t min_rxtx_sz;
void *tx, *rx;
if (kvm_host_psci_config.smccc_version < ARM_SMCCC_VERSION_1_2)
return 0;
arm_smccc_1_1_smc(FFA_VERSION, FFA_VERSION_1_0, 0, 0, 0, 0, 0, 0, &res);
arm_smccc_1_1_smc(FFA_VERSION, FFA_VERSION_1_1, 0, 0, 0, 0, 0, 0, &res);
if (res.a0 == FFA_RET_NOT_SUPPORTED)
return 0;
......@@ -737,34 +876,10 @@ int hyp_ffa_init(void *pages)
if (FFA_MAJOR_VERSION(res.a0) != 1)
return -EOPNOTSUPP;
arm_smccc_1_1_smc(FFA_ID_GET, 0, 0, 0, 0, 0, 0, 0, &res);
if (res.a0 != FFA_SUCCESS)
return -EOPNOTSUPP;
if (res.a2 != HOST_FFA_ID)
return -EINVAL;
arm_smccc_1_1_smc(FFA_FEATURES, FFA_FN64_RXTX_MAP,
0, 0, 0, 0, 0, 0, &res);
if (res.a0 != FFA_SUCCESS)
return -EOPNOTSUPP;
switch (res.a2) {
case FFA_FEAT_RXTX_MIN_SZ_4K:
min_rxtx_sz = SZ_4K;
break;
case FFA_FEAT_RXTX_MIN_SZ_16K:
min_rxtx_sz = SZ_16K;
break;
case FFA_FEAT_RXTX_MIN_SZ_64K:
min_rxtx_sz = SZ_64K;
break;
default:
return -EINVAL;
}
if (min_rxtx_sz > PAGE_SIZE)
return -EOPNOTSUPP;
if (FFA_MINOR_VERSION(res.a0) < FFA_MINOR_VERSION(FFA_VERSION_1_1))
hyp_ffa_version = res.a0;
else
hyp_ffa_version = FFA_VERSION_1_1;
tx = pages;
pages += KVM_FFA_MBOX_NR_PAGES * PAGE_SIZE;
......@@ -787,5 +902,6 @@ int hyp_ffa_init(void *pages)
.lock = __HYP_SPIN_LOCK_UNLOCKED,
};
version_lock = __HYP_SPIN_LOCK_UNLOCKED;
return 0;
}
arch/arm64/kvm/hyp/nvhe/gen-hyprel.c
View file @ 2c9b3512
......@@ -50,6 +50,9 @@
#ifndef R_AARCH64_ABS64
#define R_AARCH64_ABS64 257
#endif
#ifndef R_AARCH64_ABS32
#define R_AARCH64_ABS32 258
#endif
#ifndef R_AARCH64_PREL64
#define R_AARCH64_PREL64 260
#endif
......@@ -383,6 +386,9 @@ static void emit_rela_section(Elf64_Shdr *sh_rela)
case R_AARCH64_ABS64:
emit_rela_abs64(rela, sh_orig_name);
break;
/* Allow 32-bit absolute relocation, for kCFI type hashes. */
case R_AARCH64_ABS32:
break;
/* Allow position-relative data relocations. */
case R_AARCH64_PREL64:
case R_AARCH64_PREL32:
......
arch/arm64/kvm/hyp/nvhe/host.S
View file @ 2c9b3512
......@@ -197,12 +197,6 @@ SYM_FUNC_END(__host_hvc)
sub x0, sp, x0 // x0'' = sp' - x0' = (sp + x0) - sp = x0
sub sp, sp, x0 // sp'' = sp' - x0 = (sp + x0) - x0 = sp
/* If a guest is loaded, panic out of it. */
stp x0, x1, [sp, #-16]!
get_loaded_vcpu x0, x1
cbnz x0, __guest_exit_panic
add sp, sp, #16
/*
* The panic may not be clean if the exception is taken before the host
* context has been saved by __host_exit or after the hyp context has
......
arch/arm64/kvm/hyp/nvhe/hyp-init.S
View file @ 2c9b3512
......@@ -5,6 +5,7 @@
*/
#include <linux/arm-smccc.h>
#include <linux/cfi_types.h>
#include <linux/linkage.h>
#include <asm/alternative.h>
......@@ -265,33 +266,38 @@ alternative_else_nop_endif
SYM_CODE_END(__kvm_handle_stub_hvc)
SYM_FUNC_START(__pkvm_init_switch_pgd)
/*
* void __pkvm_init_switch_pgd(phys_addr_t pgd, unsigned long sp,
* void (*fn)(void));
*
* SYM_TYPED_FUNC_START() allows C to call this ID-mapped function indirectly
* using a physical pointer without triggering a kCFI failure.
*/
SYM_TYPED_FUNC_START(__pkvm_init_switch_pgd)
/* Turn the MMU off */
pre_disable_mmu_workaround
mrs x2, sctlr_el2
bic x3, x2, #SCTLR_ELx_M
msr sctlr_el2, x3
mrs x3, sctlr_el2
bic x4, x3, #SCTLR_ELx_M
msr sctlr_el2, x4
isb
tlbi alle2
/* Install the new pgtables */
ldr x3, [x0, #NVHE_INIT_PGD_PA]
phys_to_ttbr x4, x3
phys_to_ttbr x5, x0
alternative_if ARM64_HAS_CNP
orr x4, x4, #TTBR_CNP_BIT
orr x5, x5, #TTBR_CNP_BIT
alternative_else_nop_endif
msr ttbr0_el2, x4
msr ttbr0_el2, x5
/* Set the new stack pointer */
ldr x0, [x0, #NVHE_INIT_STACK_HYP_VA]
mov sp, x0
mov sp, x1
/* And turn the MMU back on! */
dsb nsh
isb
set_sctlr_el2 x2
ret x1
set_sctlr_el2 x3
ret x2
SYM_FUNC_END(__pkvm_init_switch_pgd)
.popsection
arch/arm64/kvm/hyp/nvhe/setup.c
View file @ 2c9b3512
......@@ -339,7 +339,7 @@ int __pkvm_init(phys_addr_t phys, unsigned long size, unsigned long nr_cpus,
{
struct kvm_nvhe_init_params *params;
void *virt = hyp_phys_to_virt(phys);
void (*fn)(phys_addr_t params_pa, void *finalize_fn_va);
typeof(__pkvm_init_switch_pgd) *fn;
int ret;
BUG_ON(kvm_check_pvm_sysreg_table());
......@@ -363,7 +363,7 @@ int __pkvm_init(phys_addr_t phys, unsigned long size, unsigned long nr_cpus,
/* Jump in the idmap page to switch to the new page-tables */
params = this_cpu_ptr(&kvm_init_params);
fn = (typeof(fn))__hyp_pa(__pkvm_init_switch_pgd);
fn(__hyp_pa(params), __pkvm_init_finalise);
fn(params->pgd_pa, params->stack_hyp_va, __pkvm_init_finalise);
unreachable();
}
arch/arm64/kvm/hyp/vhe/switch.c
View file @ 2c9b3512
......@@ -65,6 +65,77 @@ static u64 __compute_hcr(struct kvm_vcpu *vcpu)
return hcr | (__vcpu_sys_reg(vcpu, HCR_EL2) & ~NV_HCR_GUEST_EXCLUDE);
}
static void __activate_cptr_traps(struct kvm_vcpu *vcpu)
{
u64 cptr;
/*
* With VHE (HCR.E2H == 1), accesses to CPACR_EL1 are routed to
* CPTR_EL2. In general, CPACR_EL1 has the same layout as CPTR_EL2,
* except for some missing controls, such as TAM.
* In this case, CPTR_EL2.TAM has the same position with or without
* VHE (HCR.E2H == 1) which allows us to use here the CPTR_EL2.TAM
* shift value for trapping the AMU accesses.
*/
u64 val = CPACR_ELx_TTA | CPTR_EL2_TAM;
if (guest_owns_fp_regs()) {
val |= CPACR_ELx_FPEN;
if (vcpu_has_sve(vcpu))
val |= CPACR_ELx_ZEN;
} else {
__activate_traps_fpsimd32(vcpu);
}
if (!vcpu_has_nv(vcpu))
goto write;
/*
* The architecture is a bit crap (what a surprise): an EL2 guest
* writing to CPTR_EL2 via CPACR_EL1 can't set any of TCPAC or TTA,
* as they are RES0 in the guest's view. To work around it, trap the
* sucker using the very same bit it can't set...
*/
if (vcpu_el2_e2h_is_set(vcpu) && is_hyp_ctxt(vcpu))
val |= CPTR_EL2_TCPAC;
/*
* Layer the guest hypervisor's trap configuration on top of our own if
* we're in a nested context.
*/
if (is_hyp_ctxt(vcpu))
goto write;
cptr = vcpu_sanitised_cptr_el2(vcpu);
/*
* Pay attention, there's some interesting detail here.
*
* The CPTR_EL2.xEN fields are 2 bits wide, although there are only two
* meaningful trap states when HCR_EL2.TGE = 0 (running a nested guest):
*
* - CPTR_EL2.xEN = x0, traps are enabled
* - CPTR_EL2.xEN = x1, traps are disabled
*
* In other words, bit[0] determines if guest accesses trap or not. In
* the interest of simplicity, clear the entire field if the guest
* hypervisor has traps enabled to dispel any illusion of something more
* complicated taking place.
*/
if (!(SYS_FIELD_GET(CPACR_ELx, FPEN, cptr) & BIT(0)))
val &= ~CPACR_ELx_FPEN;
if (!(SYS_FIELD_GET(CPACR_ELx, ZEN, cptr) & BIT(0)))
val &= ~CPACR_ELx_ZEN;
if (kvm_has_feat(vcpu->kvm, ID_AA64MMFR3_EL1, S2POE, IMP))
val |= cptr & CPACR_ELx_E0POE;
val |= cptr & CPTR_EL2_TCPAC;
write:
write_sysreg(val, cpacr_el1);
}
static void __activate_traps(struct kvm_vcpu *vcpu)
{
u64 val;
......@@ -91,30 +162,7 @@ static void __activate_traps(struct kvm_vcpu *vcpu)
}
}
val = read_sysreg(cpacr_el1);
val |= CPACR_ELx_TTA;
val &= ~(CPACR_ELx_ZEN | CPACR_ELx_SMEN);
/*
* With VHE (HCR.E2H == 1), accesses to CPACR_EL1 are routed to
* CPTR_EL2. In general, CPACR_EL1 has the same layout as CPTR_EL2,
* except for some missing controls, such as TAM.
* In this case, CPTR_EL2.TAM has the same position with or without
* VHE (HCR.E2H == 1) which allows us to use here the CPTR_EL2.TAM
* shift value for trapping the AMU accesses.
*/
val |= CPTR_EL2_TAM;
if (guest_owns_fp_regs()) {
if (vcpu_has_sve(vcpu))
val |= CPACR_ELx_ZEN;
} else {
val &= ~CPACR_ELx_FPEN;
__activate_traps_fpsimd32(vcpu);
}
write_sysreg(val, cpacr_el1);
__activate_cptr_traps(vcpu);
write_sysreg(__this_cpu_read(kvm_hyp_vector), vbar_el1);
}
......@@ -266,10 +314,111 @@ static void kvm_hyp_save_fpsimd_host(struct kvm_vcpu *vcpu)
__fpsimd_save_state(*host_data_ptr(fpsimd_state));
}
static bool kvm_hyp_handle_tlbi_el2(struct kvm_vcpu *vcpu, u64 *exit_code)
{
int ret = -EINVAL;
u32 instr;
u64 val;
/*
* Ideally, we would never trap on EL2 S1 TLB invalidations using
* the EL1 instructions when the guest's HCR_EL2.{E2H,TGE}=={1,1}.
* But "thanks" to FEAT_NV2, we don't trap writes to HCR_EL2,
* meaning that we can't track changes to the virtual TGE bit. So we
* have to leave HCR_EL2.TTLB set on the host. Oopsie...
*
* Try and handle these invalidation as quickly as possible, without
* fully exiting. Note that we don't need to consider any forwarding
* here, as having E2H+TGE set is the very definition of being
* InHost.
*
* For the lesser hypervisors out there that have failed to get on
* with the VHE program, we can also handle the nVHE style of EL2
* invalidation.
*/
if (!(is_hyp_ctxt(vcpu)))
return false;
instr = esr_sys64_to_sysreg(kvm_vcpu_get_esr(vcpu));
val = vcpu_get_reg(vcpu, kvm_vcpu_sys_get_rt(vcpu));
if ((kvm_supported_tlbi_s1e1_op(vcpu, instr) &&
vcpu_el2_e2h_is_set(vcpu) && vcpu_el2_tge_is_set(vcpu)) ||
kvm_supported_tlbi_s1e2_op (vcpu, instr))
ret = __kvm_tlbi_s1e2(NULL, val, instr);
if (ret)
return false;
__kvm_skip_instr(vcpu);
return true;
}
static bool kvm_hyp_handle_cpacr_el1(struct kvm_vcpu *vcpu, u64 *exit_code)
{
u64 esr = kvm_vcpu_get_esr(vcpu);
int rt;
if (!is_hyp_ctxt(vcpu) || esr_sys64_to_sysreg(esr) != SYS_CPACR_EL1)
return false;
rt = kvm_vcpu_sys_get_rt(vcpu);
if ((esr & ESR_ELx_SYS64_ISS_DIR_MASK) == ESR_ELx_SYS64_ISS_DIR_READ) {
vcpu_set_reg(vcpu, rt, __vcpu_sys_reg(vcpu, CPTR_EL2));
} else {
vcpu_write_sys_reg(vcpu, vcpu_get_reg(vcpu, rt), CPTR_EL2);
__activate_cptr_traps(vcpu);
}
__kvm_skip_instr(vcpu);
return true;
}
static bool kvm_hyp_handle_zcr_el2(struct kvm_vcpu *vcpu, u64 *exit_code)
{
u32 sysreg = esr_sys64_to_sysreg(kvm_vcpu_get_esr(vcpu));
if (!vcpu_has_nv(vcpu))
return false;
if (sysreg != SYS_ZCR_EL2)
return false;
if (guest_owns_fp_regs())
return false;
/*
* ZCR_EL2 traps are handled in the slow path, with the expectation
* that the guest's FP context has already been loaded onto the CPU.
*
* Load the guest's FP context and unconditionally forward to the
* slow path for handling (i.e. return false).
*/
kvm_hyp_handle_fpsimd(vcpu, exit_code);
return false;
}
static bool kvm_hyp_handle_sysreg_vhe(struct kvm_vcpu *vcpu, u64 *exit_code)
{
if (kvm_hyp_handle_tlbi_el2(vcpu, exit_code))
return true;
if (kvm_hyp_handle_cpacr_el1(vcpu, exit_code))
return true;
if (kvm_hyp_handle_zcr_el2(vcpu, exit_code))
return true;
return kvm_hyp_handle_sysreg(vcpu, exit_code);
}
static const exit_handler_fn hyp_exit_handlers[] = {
[0 ... ESR_ELx_EC_MAX] = NULL,
[ESR_ELx_EC_CP15_32] = kvm_hyp_handle_cp15_32,
[ESR_ELx_EC_SYS64] = kvm_hyp_handle_sysreg,
[ESR_ELx_EC_SYS64] = kvm_hyp_handle_sysreg_vhe,
[ESR_ELx_EC_SVE] = kvm_hyp_handle_fpsimd,
[ESR_ELx_EC_FP_ASIMD] = kvm_hyp_handle_fpsimd,
[ESR_ELx_EC_IABT_LOW] = kvm_hyp_handle_iabt_low,
......@@ -388,7 +537,7 @@ int __kvm_vcpu_run(struct kvm_vcpu *vcpu)
return ret;
}
static void __hyp_call_panic(u64 spsr, u64 elr, u64 par)
static void __noreturn __hyp_call_panic(u64 spsr, u64 elr, u64 par)
{
struct kvm_cpu_context *host_ctxt;
struct kvm_vcpu *vcpu;
......@@ -413,7 +562,6 @@ void __noreturn hyp_panic(void)
u64 par = read_sysreg_par();
__hyp_call_panic(spsr, elr, par);
unreachable();
}
asmlinkage void kvm_unexpected_el2_exception(void)
......
arch/arm64/kvm/hyp/vhe/tlb.c
View file @ 2c9b3512
......@@ -219,3 +219,150 @@ void __kvm_flush_vm_context(void)
__tlbi(alle1is);
dsb(ish);
}
/*
* TLB invalidation emulation for NV. For any given instruction, we
* perform the following transformtions:
*
* - a TLBI targeting EL2 S1 is remapped to EL1 S1
* - a non-shareable TLBI is upgraded to being inner-shareable
* - an outer-shareable TLBI is also mapped to inner-shareable
* - an nXS TLBI is upgraded to XS
*/
int __kvm_tlbi_s1e2(struct kvm_s2_mmu *mmu, u64 va, u64 sys_encoding)
{
struct tlb_inv_context cxt;
int ret = 0;
/*
* The guest will have provided its own DSB ISHST before trapping.
* If it hasn't, that's its own problem, and we won't paper over it
* (plus, there is plenty of extra synchronisation before we even
* get here...).
*/
if (mmu)
enter_vmid_context(mmu, &cxt);
switch (sys_encoding) {
case OP_TLBI_ALLE2:
case OP_TLBI_ALLE2IS:
case OP_TLBI_ALLE2OS:
case OP_TLBI_VMALLE1:
case OP_TLBI_VMALLE1IS:
case OP_TLBI_VMALLE1OS:
case OP_TLBI_ALLE2NXS:
case OP_TLBI_ALLE2ISNXS:
case OP_TLBI_ALLE2OSNXS:
case OP_TLBI_VMALLE1NXS:
case OP_TLBI_VMALLE1ISNXS:
case OP_TLBI_VMALLE1OSNXS:
__tlbi(vmalle1is);
break;
case OP_TLBI_VAE2:
case OP_TLBI_VAE2IS:
case OP_TLBI_VAE2OS:
case OP_TLBI_VAE1:
case OP_TLBI_VAE1IS:
case OP_TLBI_VAE1OS:
case OP_TLBI_VAE2NXS:
case OP_TLBI_VAE2ISNXS:
case OP_TLBI_VAE2OSNXS:
case OP_TLBI_VAE1NXS:
case OP_TLBI_VAE1ISNXS:
case OP_TLBI_VAE1OSNXS:
__tlbi(vae1is, va);
break;
case OP_TLBI_VALE2:
case OP_TLBI_VALE2IS:
case OP_TLBI_VALE2OS:
case OP_TLBI_VALE1:
case OP_TLBI_VALE1IS:
case OP_TLBI_VALE1OS:
case OP_TLBI_VALE2NXS:
case OP_TLBI_VALE2ISNXS:
case OP_TLBI_VALE2OSNXS:
case OP_TLBI_VALE1NXS:
case OP_TLBI_VALE1ISNXS:
case OP_TLBI_VALE1OSNXS:
__tlbi(vale1is, va);
break;
case OP_TLBI_ASIDE1:
case OP_TLBI_ASIDE1IS:
case OP_TLBI_ASIDE1OS:
case OP_TLBI_ASIDE1NXS:
case OP_TLBI_ASIDE1ISNXS:
case OP_TLBI_ASIDE1OSNXS:
__tlbi(aside1is, va);
break;
case OP_TLBI_VAAE1:
case OP_TLBI_VAAE1IS:
case OP_TLBI_VAAE1OS:
case OP_TLBI_VAAE1NXS:
case OP_TLBI_VAAE1ISNXS:
case OP_TLBI_VAAE1OSNXS:
__tlbi(vaae1is, va);
break;
case OP_TLBI_VAALE1:
case OP_TLBI_VAALE1IS:
case OP_TLBI_VAALE1OS:
case OP_TLBI_VAALE1NXS:
case OP_TLBI_VAALE1ISNXS:
case OP_TLBI_VAALE1OSNXS:
__tlbi(vaale1is, va);
break;
case OP_TLBI_RVAE2:
case OP_TLBI_RVAE2IS:
case OP_TLBI_RVAE2OS:
case OP_TLBI_RVAE1:
case OP_TLBI_RVAE1IS:
case OP_TLBI_RVAE1OS:
case OP_TLBI_RVAE2NXS:
case OP_TLBI_RVAE2ISNXS:
case OP_TLBI_RVAE2OSNXS:
case OP_TLBI_RVAE1NXS:
case OP_TLBI_RVAE1ISNXS:
case OP_TLBI_RVAE1OSNXS:
__tlbi(rvae1is, va);
break;
case OP_TLBI_RVALE2:
case OP_TLBI_RVALE2IS:
case OP_TLBI_RVALE2OS:
case OP_TLBI_RVALE1:
case OP_TLBI_RVALE1IS:
case OP_TLBI_RVALE1OS:
case OP_TLBI_RVALE2NXS:
case OP_TLBI_RVALE2ISNXS:
case OP_TLBI_RVALE2OSNXS:
case OP_TLBI_RVALE1NXS:
case OP_TLBI_RVALE1ISNXS:
case OP_TLBI_RVALE1OSNXS:
__tlbi(rvale1is, va);
break;
case OP_TLBI_RVAAE1:
case OP_TLBI_RVAAE1IS:
case OP_TLBI_RVAAE1OS:
case OP_TLBI_RVAAE1NXS:
case OP_TLBI_RVAAE1ISNXS:
case OP_TLBI_RVAAE1OSNXS:
__tlbi(rvaae1is, va);
break;
case OP_TLBI_RVAALE1:
case OP_TLBI_RVAALE1IS:
case OP_TLBI_RVAALE1OS:
case OP_TLBI_RVAALE1NXS:
case OP_TLBI_RVAALE1ISNXS:
case OP_TLBI_RVAALE1OSNXS:
__tlbi(rvaale1is, va);
break;
default:
ret = -EINVAL;
}
dsb(ish);
isb();
if (mmu)
exit_vmid_context(&cxt);
return ret;
}
arch/arm64/kvm/mmu.c
View file @ 2c9b3512
This diff is collapsed.
arch/arm64/kvm/nested.c
View file @ 2c9b3512
This diff is collapsed.
arch/arm64/kvm/pmu-emul.c
View file @ 2c9b3512
......@@ -53,7 +53,7 @@ static u32 __kvm_pmu_event_mask(unsigned int pmuver)
static u32 kvm_pmu_event_mask(struct kvm *kvm)
{
u64 dfr0 = IDREG(kvm, SYS_ID_AA64DFR0_EL1);
u64 dfr0 = kvm_read_vm_id_reg(kvm, SYS_ID_AA64DFR0_EL1);
u8 pmuver = SYS_FIELD_GET(ID_AA64DFR0_EL1, PMUVer, dfr0);
return __kvm_pmu_event_mask(pmuver);
......
arch/arm64/kvm/reset.c
View file @ 2c9b3512
......@@ -268,6 +268,12 @@ void kvm_reset_vcpu(struct kvm_vcpu *vcpu)
preempt_enable();
}
u32 kvm_get_pa_bits(struct kvm *kvm)
{
/* Fixed limit until we can configure ID_AA64MMFR0.PARange */
return kvm_ipa_limit;
}
u32 get_kvm_ipa_limit(void)
{
return kvm_ipa_limit;
......
arch/arm64/kvm/sys_regs.c
View file @ 2c9b3512
This diff is collapsed.
arch/loongarch/Kconfig
View file @ 2c9b3512
......@@ -649,6 +649,17 @@ config PARAVIRT
over full virtualization. However, when run without a hypervisor
the kernel is theoretically slower and slightly larger.
config PARAVIRT_TIME_ACCOUNTING
bool "Paravirtual steal time accounting"
depends on PARAVIRT
help
Select this option to enable fine granularity task steal time
accounting. Time spent executing other tasks in parallel with
the current vCPU is discounted from the vCPU power. To account for
that, there can be a small performance impact.
If in doubt, say N here.
endmenu
config ARCH_SELECT_MEMORY_MODEL
......
arch/loongarch/include/asm/kvm_host.h
View file @ 2c9b3512
......@@ -30,12 +30,17 @@
#define KVM_PRIVATE_MEM_SLOTS 0
#define KVM_HALT_POLL_NS_DEFAULT 500000
#define KVM_REQ_TLB_FLUSH_GPA KVM_ARCH_REQ(0)
#define KVM_REQ_STEAL_UPDATE KVM_ARCH_REQ(1)
#define KVM_GUESTDBG_SW_BP_MASK \
(KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)
#define KVM_GUESTDBG_VALID_MASK \
(KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP | KVM_GUESTDBG_SINGLESTEP)
#define KVM_DIRTY_LOG_MANUAL_CAPS \
(KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE | KVM_DIRTY_LOG_INITIALLY_SET)
struct kvm_vm_stat {
struct kvm_vm_stat_generic generic;
u64 pages;
......@@ -190,6 +195,7 @@ struct kvm_vcpu_arch {
/* vcpu's vpid */
u64 vpid;
gpa_t flush_gpa;
/* Frequency of stable timer in Hz */
u64 timer_mhz;
......@@ -201,6 +207,13 @@ struct kvm_vcpu_arch {
struct kvm_mp_state mp_state;
/* cpucfg */
u32 cpucfg[KVM_MAX_CPUCFG_REGS];
/* paravirt steal time */
struct {
u64 guest_addr;
u64 last_steal;
struct gfn_to_hva_cache cache;
} st;
};
static inline unsigned long readl_sw_gcsr(struct loongarch_csrs *csr, int reg)
......@@ -261,7 +274,6 @@ static inline bool kvm_is_ifetch_fault(struct kvm_vcpu_arch *arch)
static inline void kvm_arch_hardware_unsetup(void) {}
static inline void kvm_arch_sync_events(struct kvm *kvm) {}
static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {}
static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
static inline void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu) {}
......
arch/loongarch/include/asm/kvm_para.h
View file @ 2c9b3512
......@@ -14,6 +14,7 @@
#define KVM_HCALL_SERVICE HYPERCALL_ENCODE(HYPERVISOR_KVM, KVM_HCALL_CODE_SERVICE)
#define KVM_HCALL_FUNC_IPI 1
#define KVM_HCALL_FUNC_NOTIFY 2
#define KVM_HCALL_SWDBG HYPERCALL_ENCODE(HYPERVISOR_KVM, KVM_HCALL_CODE_SWDBG)
......@@ -24,6 +25,16 @@
#define KVM_HCALL_INVALID_CODE -1UL
#define KVM_HCALL_INVALID_PARAMETER -2UL
#define KVM_STEAL_PHYS_VALID BIT_ULL(0)
#define KVM_STEAL_PHYS_MASK GENMASK_ULL(63, 6)
struct kvm_steal_time {
__u64 steal;
__u32 version;
__u32 flags;
__u32 pad[12];
};
/*
* Hypercall interface for KVM hypervisor
*
......
arch/loongarch/include/asm/kvm_vcpu.h
View file @ 2c9b3512
......@@ -120,4 +120,9 @@ static inline void kvm_write_reg(struct kvm_vcpu *vcpu, int num, unsigned long v
vcpu->arch.gprs[num] = val;
}
static inline bool kvm_pvtime_supported(void)
{
return !!sched_info_on();
}
#endif /* __ASM_LOONGARCH_KVM_VCPU_H__ */
arch/loongarch/include/asm/loongarch.h
View file @ 2c9b3512
......@@ -169,6 +169,7 @@
#define KVM_SIGNATURE "KVM\0"
#define CPUCFG_KVM_FEATURE (CPUCFG_KVM_BASE + 4)
#define KVM_FEATURE_IPI BIT(1)
#define KVM_FEATURE_STEAL_TIME BIT(2)
#ifndef __ASSEMBLY__
......
arch/loongarch/include/asm/paravirt.h
View file @ 2c9b3512
......@@ -18,6 +18,7 @@ static inline u64 paravirt_steal_clock(int cpu)
}
int __init pv_ipi_init(void);
int __init pv_time_init(void);
#else
......@@ -26,5 +27,9 @@ static inline int pv_ipi_init(void)
return 0;
}
static inline int pv_time_init(void)
{
return 0;
}
#endif // CONFIG_PARAVIRT
#endif
arch/loongarch/include/uapi/asm/kvm.h
View file @ 2c9b3512
......@@ -81,7 +81,11 @@ struct kvm_fpu {
#define LOONGARCH_REG_64(TYPE, REG) (TYPE | KVM_REG_SIZE_U64 | (REG << LOONGARCH_REG_SHIFT))
#define KVM_IOC_CSRID(REG) LOONGARCH_REG_64(KVM_REG_LOONGARCH_CSR, REG)
#define KVM_IOC_CPUCFG(REG) LOONGARCH_REG_64(KVM_REG_LOONGARCH_CPUCFG, REG)
/* Device Control API on vcpu fd */
#define KVM_LOONGARCH_VCPU_CPUCFG 0
#define KVM_LOONGARCH_VCPU_PVTIME_CTRL 1
#define KVM_LOONGARCH_VCPU_PVTIME_GPA 0
struct kvm_debug_exit_arch {
};
......
arch/loongarch/kernel/paravirt.c
View file @ 2c9b3512
......@@ -4,11 +4,14 @@
#include <linux/interrupt.h>
#include <linux/jump_label.h>
#include <linux/kvm_para.h>
#include <linux/reboot.h>
#include <linux/static_call.h>
#include <asm/paravirt.h>
static int has_steal_clock;
struct static_key paravirt_steal_enabled;
struct static_key paravirt_steal_rq_enabled;
static DEFINE_PER_CPU(struct kvm_steal_time, steal_time) __aligned(64);
static u64 native_steal_clock(int cpu)
{
......@@ -17,6 +20,34 @@ static u64 native_steal_clock(int cpu)
DEFINE_STATIC_CALL(pv_steal_clock, native_steal_clock);
static bool steal_acc = true;
static int __init parse_no_stealacc(char *arg)
{
steal_acc = false;
return 0;
}
early_param("no-steal-acc", parse_no_stealacc);
static u64 paravt_steal_clock(int cpu)
{
int version;
u64 steal;
struct kvm_steal_time *src;
src = &per_cpu(steal_time, cpu);
do {
version = src->version;
virt_rmb(); /* Make sure that the version is read before the steal */
steal = src->steal;
virt_rmb(); /* Make sure that the steal is read before the next version */
} while ((version & 1) || (version != src->version));
return steal;
}
#ifdef CONFIG_SMP
static void pv_send_ipi_single(int cpu, unsigned int action)
{
......@@ -149,3 +180,117 @@ int __init pv_ipi_init(void)
return 0;
}
static int pv_enable_steal_time(void)
{
int cpu = smp_processor_id();
unsigned long addr;
struct kvm_steal_time *st;
if (!has_steal_clock)
return -EPERM;
st = &per_cpu(steal_time, cpu);
addr = per_cpu_ptr_to_phys(st);
/* The whole structure kvm_steal_time should be in one page */
if (PFN_DOWN(addr) != PFN_DOWN(addr + sizeof(*st))) {
pr_warn("Illegal PV steal time addr %lx\n", addr);
return -EFAULT;
}
addr |= KVM_STEAL_PHYS_VALID;
kvm_hypercall2(KVM_HCALL_FUNC_NOTIFY, KVM_FEATURE_STEAL_TIME, addr);
return 0;
}
static void pv_disable_steal_time(void)
{
if (has_steal_clock)
kvm_hypercall2(KVM_HCALL_FUNC_NOTIFY, KVM_FEATURE_STEAL_TIME, 0);
}
#ifdef CONFIG_SMP
static int pv_time_cpu_online(unsigned int cpu)
{
unsigned long flags;
local_irq_save(flags);
pv_enable_steal_time();
local_irq_restore(flags);
return 0;
}
static int pv_time_cpu_down_prepare(unsigned int cpu)
{
unsigned long flags;
local_irq_save(flags);
pv_disable_steal_time();
local_irq_restore(flags);
return 0;
}
#endif
static void pv_cpu_reboot(void *unused)
{
pv_disable_steal_time();
}
static int pv_reboot_notify(struct notifier_block *nb, unsigned long code, void *unused)
{
on_each_cpu(pv_cpu_reboot, NULL, 1);
return NOTIFY_DONE;
}
static struct notifier_block pv_reboot_nb = {
.notifier_call = pv_reboot_notify,
};
int __init pv_time_init(void)
{
int r, feature;
if (!cpu_has_hypervisor)
return 0;
if (!kvm_para_available())
return 0;
feature = read_cpucfg(CPUCFG_KVM_FEATURE);
if (!(feature & KVM_FEATURE_STEAL_TIME))
return 0;
has_steal_clock = 1;
r = pv_enable_steal_time();
if (r < 0) {
has_steal_clock = 0;
return 0;
}
register_reboot_notifier(&pv_reboot_nb);
#ifdef CONFIG_SMP
r = cpuhp_setup_state_nocalls(CPUHP_AP_ONLINE_DYN,
"loongarch/pv_time:online",
pv_time_cpu_online, pv_time_cpu_down_prepare);
if (r < 0) {
has_steal_clock = 0;
pr_err("Failed to install cpu hotplug callbacks\n");
return r;
}
#endif
static_call_update(pv_steal_clock, paravt_steal_clock);
static_key_slow_inc(&paravirt_steal_enabled);
#ifdef CONFIG_PARAVIRT_TIME_ACCOUNTING
if (steal_acc)
static_key_slow_inc(&paravirt_steal_rq_enabled);
#endif
pr_info("Using paravirt steal-time\n");
return 0;
}
arch/loongarch/kernel/time.c
View file @ 2c9b3512
......@@ -15,6 +15,7 @@
#include <asm/cpu-features.h>
#include <asm/loongarch.h>
#include <asm/paravirt.h>
#include <asm/time.h>
u64 cpu_clock_freq;
......@@ -214,4 +215,5 @@ void __init time_init(void)
constant_clockevent_init();
constant_clocksource_init();
pv_time_init();
}
arch/loongarch/kvm/Kconfig
View file @ 2c9b3512
......@@ -29,6 +29,7 @@ config KVM
select KVM_MMIO
select HAVE_KVM_READONLY_MEM
select KVM_XFER_TO_GUEST_WORK
select SCHED_INFO
help
Support hosting virtualized guest machines using
hardware virtualization extensions. You will need
......
arch/loongarch/kvm/exit.c
View file @ 2c9b3512
This diff is collapsed.
arch/loongarch/kvm/main.c
View file @ 2c9b3512
......@@ -242,6 +242,7 @@ void kvm_check_vpid(struct kvm_vcpu *vcpu)
kvm_update_vpid(vcpu, cpu);
trace_kvm_vpid_change(vcpu, vcpu->arch.vpid);
vcpu->cpu = cpu;
kvm_clear_request(KVM_REQ_TLB_FLUSH_GPA, vcpu);
}
/* Restore GSTAT(0x50).vpid */
......
arch/loongarch/kvm/mmu.c
View file @ 2c9b3512
This diff is collapsed.
arch/loongarch/kvm/tlb.c
View file @ 2c9b3512
......@@ -23,10 +23,7 @@ void kvm_flush_tlb_all(void)
void kvm_flush_tlb_gpa(struct kvm_vcpu *vcpu, unsigned long gpa)
{
unsigned long flags;
local_irq_save(flags);
lockdep_assert_irqs_disabled();
gpa &= (PAGE_MASK << 1);
invtlb(INVTLB_GID_ADDR, read_csr_gstat() & CSR_GSTAT_GID, gpa);
local_irq_restore(flags);
}
arch/loongarch/kvm/vcpu.c
View file @ 2c9b3512
This diff is collapsed.
arch/mips/include/asm/kvm_host.h
View file @ 2c9b3512
......@@ -890,7 +890,6 @@ static inline void kvm_arch_sync_events(struct kvm *kvm) {}
static inline void kvm_arch_free_memslot(struct kvm *kvm,
struct kvm_memory_slot *slot) {}
static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {}
static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
......
arch/mips/kvm/mips.c
View file @ 2c9b3512
......@@ -434,7 +434,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
vcpu->mmio_needed = 0;
}
if (vcpu->run->immediate_exit)
if (!vcpu->wants_to_run)
goto out;
lose_fpu(1);
......
arch/powerpc/include/asm/kvm_host.h
View file @ 2c9b3512
......@@ -900,7 +900,6 @@ struct kvm_vcpu_arch {
static inline void kvm_arch_sync_events(struct kvm *kvm) {}
static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {}
static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {}
static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
......
arch/powerpc/kvm/powerpc.c
View file @ 2c9b3512
......@@ -1852,7 +1852,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
kvm_sigset_activate(vcpu);
if (run->immediate_exit)
if (!vcpu->wants_to_run)
r = -EINTR;
else
r = kvmppc_vcpu_run(vcpu);
......
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