Commit d4c7688c authored by Marc Zyngier's avatar Marc Zyngier

ARM: KVM: Switch to C-based stage2 init

As we now have hooks to setup VTCR from C code, let's drop the
original VTCR setup and reimplement it as part of the HYP code.
Reviewed-by: default avatarChristoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: default avatarMarc Zyngier <marc.zyngier@arm.com>
parent b98e2e72
...@@ -98,6 +98,8 @@ extern void __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa); ...@@ -98,6 +98,8 @@ extern void __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa);
extern void __kvm_tlb_flush_vmid(struct kvm *kvm); extern void __kvm_tlb_flush_vmid(struct kvm *kvm);
extern int __kvm_vcpu_run(struct kvm_vcpu *vcpu); extern int __kvm_vcpu_run(struct kvm_vcpu *vcpu);
extern void __init_stage2_translation(void);
#endif #endif
#endif /* __ARM_KVM_ASM_H__ */ #endif /* __ARM_KVM_ASM_H__ */
...@@ -224,6 +224,7 @@ static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr, ...@@ -224,6 +224,7 @@ static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr,
static inline void __cpu_init_stage2(void) static inline void __cpu_init_stage2(void)
{ {
kvm_call_hyp(__init_stage2_translation);
} }
static inline int kvm_arch_dev_ioctl_check_extension(long ext) static inline int kvm_arch_dev_ioctl_check_extension(long ext)
......
...@@ -11,3 +11,4 @@ obj-$(CONFIG_KVM_ARM_HOST) += banked-sr.o ...@@ -11,3 +11,4 @@ obj-$(CONFIG_KVM_ARM_HOST) += banked-sr.o
obj-$(CONFIG_KVM_ARM_HOST) += entry.o obj-$(CONFIG_KVM_ARM_HOST) += entry.o
obj-$(CONFIG_KVM_ARM_HOST) += hyp-entry.o obj-$(CONFIG_KVM_ARM_HOST) += hyp-entry.o
obj-$(CONFIG_KVM_ARM_HOST) += switch.o obj-$(CONFIG_KVM_ARM_HOST) += switch.o
obj-$(CONFIG_KVM_ARM_HOST) += s2-setup.o
...@@ -71,6 +71,8 @@ ...@@ -71,6 +71,8 @@
#define HCPTR __ACCESS_CP15(c1, 4, c1, 2) #define HCPTR __ACCESS_CP15(c1, 4, c1, 2)
#define HSTR __ACCESS_CP15(c1, 4, c1, 3) #define HSTR __ACCESS_CP15(c1, 4, c1, 3)
#define TTBCR __ACCESS_CP15(c2, 0, c0, 2) #define TTBCR __ACCESS_CP15(c2, 0, c0, 2)
#define HTCR __ACCESS_CP15(c2, 4, c0, 2)
#define VTCR __ACCESS_CP15(c2, 4, c1, 2)
#define DACR __ACCESS_CP15(c3, 0, c0, 0) #define DACR __ACCESS_CP15(c3, 0, c0, 0)
#define DFSR __ACCESS_CP15(c5, 0, c0, 0) #define DFSR __ACCESS_CP15(c5, 0, c0, 0)
#define IFSR __ACCESS_CP15(c5, 0, c0, 1) #define IFSR __ACCESS_CP15(c5, 0, c0, 1)
......
/*
* Copyright (C) 2016 - ARM Ltd
* Author: Marc Zyngier <marc.zyngier@arm.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/types.h>
#include <asm/kvm_arm.h>
#include <asm/kvm_asm.h>
#include "hyp.h"
void __hyp_text __init_stage2_translation(void)
{
u64 val;
val = read_sysreg(VTCR) & ~VTCR_MASK;
val |= read_sysreg(HTCR) & VTCR_HTCR_SH;
val |= KVM_VTCR_SL0 | KVM_VTCR_T0SZ | KVM_VTCR_S;
write_sysreg(val, VTCR);
}
...@@ -84,14 +84,6 @@ __do_hyp_init: ...@@ -84,14 +84,6 @@ __do_hyp_init:
orr r0, r0, r1 orr r0, r0, r1
mcr p15, 4, r0, c2, c0, 2 @ HTCR mcr p15, 4, r0, c2, c0, 2 @ HTCR
mrc p15, 4, r1, c2, c1, 2 @ VTCR
ldr r2, =VTCR_MASK
bic r1, r1, r2
bic r0, r0, #(~VTCR_HTCR_SH) @ clear non-reusable HTCR bits
orr r1, r0, r1
orr r1, r1, #(KVM_VTCR_SL0 | KVM_VTCR_T0SZ | KVM_VTCR_S)
mcr p15, 4, r1, c2, c1, 2 @ VTCR
@ Use the same memory attributes for hyp. accesses as the kernel @ Use the same memory attributes for hyp. accesses as the kernel
@ (copy MAIRx ro HMAIRx). @ (copy MAIRx ro HMAIRx).
mrc p15, 0, r0, c10, c2, 0 mrc p15, 0, r0, c10, c2, 0
......
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