1. 25 Jun, 2020 1 commit
  2. 24 Jun, 2020 3 commits
  3. 23 Jun, 2020 6 commits
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 26e122e9
      Linus Torvalds authored
      Pull kvm fixes from Paolo Bonzini:
       "All bugfixes except for a couple cleanup patches"
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
        KVM: VMX: Remove vcpu_vmx's defunct copy of host_pkru
        KVM: x86: allow TSC to differ by NTP correction bounds without TSC scaling
        KVM: X86: Fix MSR range of APIC registers in X2APIC mode
        KVM: VMX: Stop context switching MSR_IA32_UMWAIT_CONTROL
        KVM: nVMX: Plumb L2 GPA through to PML emulation
        KVM: x86/mmu: Avoid mixing gpa_t with gfn_t in walk_addr_generic()
        KVM: LAPIC: ensure APIC map is up to date on concurrent update requests
        kvm: lapic: fix broken vcpu hotplug
        Revert "KVM: VMX: Micro-optimize vmexit time when not exposing PMU"
        KVM: VMX: Add helpers to identify interrupt type from intr_info
        kvm/svm: disable KCSAN for svm_vcpu_run()
        KVM: MIPS: Fix a build error for !CPU_LOONGSON64
      26e122e9
    • Linus Torvalds's avatar
      Merge tag 'for-5.8-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux · 3e08a952
      Linus Torvalds authored
      Pull btrfs fixes from David Sterba:
       "A number of fixes, located in two areas, one performance fix and one
        fixup for better integration with another patchset.
      
         - bug fixes in nowait aio:
             - fix snapshot creation hang after nowait-aio was used
             - fix failure to write to prealloc extent past EOF
             - don't block when extent range is locked
      
         - block group fixes:
             - relocation failure when scrub runs in parallel
             - refcount fix when removing fails
             - fix race between removal and creation
             - space accounting fixes
      
         - reinstante fast path check for log tree at unlink time, fixes
           performance drop up to 30% in REAIM
      
         - kzfree/kfree fixup to ease treewide patchset renaming kzfree"
      
      * tag 'for-5.8-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
        btrfs: use kfree() in btrfs_ioctl_get_subvol_info()
        btrfs: fix RWF_NOWAIT writes blocking on extent locks and waiting for IO
        btrfs: fix RWF_NOWAIT write not failling when we need to cow
        btrfs: fix failure of RWF_NOWAIT write into prealloc extent beyond eof
        btrfs: fix hang on snapshot creation after RWF_NOWAIT write
        btrfs: check if a log root exists before locking the log_mutex on unlink
        btrfs: fix bytes_may_use underflow when running balance and scrub in parallel
        btrfs: fix data block group relocation failure due to concurrent scrub
        btrfs: fix race between block group removal and block group creation
        btrfs: fix a block group ref counter leak after failure to remove block group
      3e08a952
    • Sean Christopherson's avatar
      KVM: VMX: Remove vcpu_vmx's defunct copy of host_pkru · e4553b49
      Sean Christopherson authored
      Remove vcpu_vmx.host_pkru, which got left behind when PKRU support was
      moved to common x86 code.
      
      No functional change intended.
      
      Fixes: 37486135 ("KVM: x86: Fix pkru save/restore when guest CR4.PKE=0, move it to x86.c")
      Signed-off-by: default avatarSean Christopherson <sean.j.christopherson@intel.com>
      Message-Id: <20200617034123.25647-1-sean.j.christopherson@intel.com>
      Reviewed-by: default avatarVitaly Kuznetsov <vkuznets@redhat.com>
      Reviewed-by: default avatarJim Mattson <jmattson@google.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      e4553b49
    • Marcelo Tosatti's avatar
      KVM: x86: allow TSC to differ by NTP correction bounds without TSC scaling · 26769f96
      Marcelo Tosatti authored
      The Linux TSC calibration procedure is subject to small variations
      (its common to see +-1 kHz difference between reboots on a given CPU, for example).
      
      So migrating a guest between two hosts with identical processor can fail, in case
      of a small variation in calibrated TSC between them.
      
      Without TSC scaling, the current kernel interface will either return an error
      (if user_tsc_khz <= tsc_khz) or enable TSC catchup mode.
      
      This change enables the following TSC tolerance check to
      accept KVM_SET_TSC_KHZ within tsc_tolerance_ppm (which is 250ppm by default).
      
              /*
               * Compute the variation in TSC rate which is acceptable
               * within the range of tolerance and decide if the
               * rate being applied is within that bounds of the hardware
               * rate.  If so, no scaling or compensation need be done.
               */
              thresh_lo = adjust_tsc_khz(tsc_khz, -tsc_tolerance_ppm);
              thresh_hi = adjust_tsc_khz(tsc_khz, tsc_tolerance_ppm);
              if (user_tsc_khz < thresh_lo || user_tsc_khz > thresh_hi) {
                      pr_debug("kvm: requested TSC rate %u falls outside tolerance [%u,%u]\n", user_tsc_khz, thresh_lo, thresh_hi);
                      use_scaling = 1;
              }
      
      NTP daemon in the guest can correct this difference (NTP can correct upto 500ppm).
      Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
      
      Message-Id: <20200616114741.GA298183@fuller.cnet>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      26769f96
    • Xiaoyao Li's avatar
      KVM: X86: Fix MSR range of APIC registers in X2APIC mode · bf10bd0b
      Xiaoyao Li authored
      Only MSR address range 0x800 through 0x8ff is architecturally reserved
      and dedicated for accessing APIC registers in x2APIC mode.
      
      Fixes: 0105d1a5 ("KVM: x2apic interface to lapic")
      Signed-off-by: default avatarXiaoyao Li <xiaoyao.li@intel.com>
      Message-Id: <20200616073307.16440-1-xiaoyao.li@intel.com>
      Cc: stable@vger.kernel.org
      Reviewed-by: default avatarSean Christopherson <sean.j.christopherson@intel.com>
      Reviewed-by: default avatarJim Mattson <jmattson@google.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      bf10bd0b
    • Sean Christopherson's avatar
      KVM: VMX: Stop context switching MSR_IA32_UMWAIT_CONTROL · bf09fb6c
      Sean Christopherson authored
      Remove support for context switching between the guest's and host's
      desired UMWAIT_CONTROL.  Propagating the guest's value to hardware isn't
      required for correct functionality, e.g. KVM intercepts reads and writes
      to the MSR, and the latency effects of the settings controlled by the
      MSR are not architecturally visible.
      
      As a general rule, KVM should not allow the guest to control power
      management settings unless explicitly enabled by userspace, e.g. see
      KVM_CAP_X86_DISABLE_EXITS.  E.g. Intel's SDM explicitly states that C0.2
      can improve the performance of SMT siblings.  A devious guest could
      disable C0.2 so as to improve the performance of their workloads at the
      detriment to workloads running in the host or on other VMs.
      
      Wholesale removal of UMWAIT_CONTROL context switching also fixes a race
      condition where updates from the host may cause KVM to enter the guest
      with the incorrect value.  Because updates are are propagated to all
      CPUs via IPI (SMP function callback), the value in hardware may be
      stale with respect to the cached value and KVM could enter the guest
      with the wrong value in hardware.  As above, the guest can't observe the
      bad value, but it's a weird and confusing wart in the implementation.
      
      Removal also fixes the unnecessary usage of VMX's atomic load/store MSR
      lists.  Using the lists is only necessary for MSRs that are required for
      correct functionality immediately upon VM-Enter/VM-Exit, e.g. EFER on
      old hardware, or for MSRs that need to-the-uop precision, e.g. perf
      related MSRs.  For UMWAIT_CONTROL, the effects are only visible in the
      kernel via TPAUSE/delay(), and KVM doesn't do any form of delay in
      vcpu_vmx_run().  Using the atomic lists is undesirable as they are more
      expensive than direct RDMSR/WRMSR.
      
      Furthermore, even if giving the guest control of the MSR is legitimate,
      e.g. in pass-through scenarios, it's not clear that the benefits would
      outweigh the overhead.  E.g. saving and restoring an MSR across a VMX
      roundtrip costs ~250 cycles, and if the guest diverged from the host
      that cost would be paid on every run of the guest.  In other words, if
      there is a legitimate use case then it should be enabled by a new
      per-VM capability.
      
      Note, KVM still needs to emulate MSR_IA32_UMWAIT_CONTROL so that it can
      correctly expose other WAITPKG features to the guest, e.g. TPAUSE,
      UMWAIT and UMONITOR.
      
      Fixes: 6e3ba4ab ("KVM: vmx: Emulate MSR IA32_UMWAIT_CONTROL")
      Cc: stable@vger.kernel.org
      Cc: Jingqi Liu <jingqi.liu@intel.com>
      Cc: Tao Xu <tao3.xu@intel.com>
      Signed-off-by: default avatarSean Christopherson <sean.j.christopherson@intel.com>
      Message-Id: <20200623005135.10414-1-sean.j.christopherson@intel.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      bf09fb6c
  4. 22 Jun, 2020 19 commits
  5. 21 Jun, 2020 10 commits
    • Linus Torvalds's avatar
      Linux 5.8-rc2 · 48778464
      Linus Torvalds authored
      48778464
    • Linus Torvalds's avatar
      Merge tag 'selinux-pr-20200621' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux · 817d914d
      Linus Torvalds authored
      Pull SELinux fixes from Paul Moore:
       "Three small patches to fix problems in the SELinux code, all found via
        clang.
      
        Two patches fix potential double-free conditions and one fixes an
        undefined return value"
      
      * tag 'selinux-pr-20200621' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux:
        selinux: fix undefined return of cond_evaluate_expr
        selinux: fix a double free in cond_read_node()/cond_read_list()
        selinux: fix double free
      817d914d
    • Linus Torvalds's avatar
      Merge tag 'pinctrl-v5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl · 16f4aa9b
      Linus Torvalds authored
      Pull pin control fixes from Linus Walleij:
       "Some early fixes collected during the first week after the merge
        window, all pretty self-evident, with the details below. The revert is
        the crucial thing.
      
         - Fix a warning on the Qualcomm SPMI GPIO chip being instatiated
           twice without a unique irqchip struct
      
         - Use the noirq variants of the suspend and resume callbacks in the
           Tegra driver
      
         - Clean up the errorpath on the MCP23s08 driver
      
         - Revert the use of devm_of_iomap() in the Freescale driver as it was
           regressing the platform
      
         - Add some missing pins in the Qualcomm IPQ6018 driver
      
         - Fix a simple documentation bug in the pinctrl-single driver"
      
      * tag 'pinctrl-v5.8-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
        pinctrl: single: fix function name in documentation
        pinctrl: qcom: ipq6018 Add missing pins in qpic pin group
        Revert "pinctrl: freescale: imx: Use 'devm_of_iomap()' to avoid a resource leak in case of error in 'imx_pinctrl_probe()'"
        pinctrl: mcp23s08: Split to three parts: fix ptr_ret.cocci warnings
        pinctrl: tegra: Use noirq suspend/resume callbacks
        pinctrl: qcom: spmi-gpio: fix warning about irq chip reusage
      16f4aa9b
    • Linus Torvalds's avatar
      Merge tag 'kbuild-fixes-v5.8' of... · be9160a9
      Linus Torvalds authored
      Merge tag 'kbuild-fixes-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
      
      Pull Kbuild fixes from Masahiro Yamada:
      
       - fix -gz=zlib compiler option test for CONFIG_DEBUG_INFO_COMPRESSED
      
       - improve cc-option in scripts/Kbuild.include to clean up temp files
      
       - improve cc-option in scripts/Kconfig.include for more reliable
         compile option test
      
       - do not copy modules.builtin by 'make install' because it would break
         existing systems
      
       - use 'userprogs' syntax for watch_queue sample
      
      * tag 'kbuild-fixes-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
        samples: watch_queue: build sample program for target architecture
        Revert "Makefile: install modules.builtin even if CONFIG_MODULES=n"
        scripts: Fix typo in headers_install.sh
        kconfig: unify cc-option and as-option
        kbuild: improve cc-option to clean up all temporary files
        Makefile: Improve compressed debug info support detection
      be9160a9
    • Linus Torvalds's avatar
      Merge tag 'powerpc-5.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux · 75613939
      Linus Torvalds authored
      Pull powerpc fixes from Michael Ellerman:
      
       - One fix for the interrupt rework we did last release which broke
         KVM-PR
      
       - Three commits fixing some fallout from the READ_ONCE() changes
         interacting badly with our 8xx 16K pages support, which uses a pte_t
         that is a structure of 4 actual PTEs
      
       - A cleanup of the 8xx pte_update() to use the newly added pmd_off()
      
       - A fix for a crash when handling an oops if CONFIG_DEBUG_VIRTUAL is
         enabled
      
       - A minor fix for the SPU syscall generation
      
      Thanks to Aneesh Kumar K.V, Christian Zigotzky, Christophe Leroy, Mike
      Rapoport, Nicholas Piggin.
      
      * tag 'powerpc-5.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
        powerpc/8xx: Provide ptep_get() with 16k pages
        mm: Allow arches to provide ptep_get()
        mm/gup: Use huge_ptep_get() in gup_hugepte()
        powerpc/syscalls: Use the number when building SPU syscall table
        powerpc/8xx: use pmd_off() to access a PMD entry in pte_update()
        powerpc/64s: Fix KVM interrupt using wrong save area
        powerpc: Fix kernel crash in show_instructions() w/DEBUG_VIRTUAL
      75613939
    • Linus Torvalds's avatar
      Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 · 93bbca27
      Linus Torvalds authored
      Pull crypto fixes from Herbert Xu:
      
       - NULL dereference in octeontx
      
       - PM reference imbalance in ks-sa
      
       - deadlock in crypto manager
      
       - memory leak in drbg
      
       - missing socket limit check on receive SG list size in algif_skcipher
      
       - typos in caam
      
       - warnings in ccp and hisilicon
      
      * 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
        crypto: drbg - always try to free Jitter RNG instance
        crypto: marvell/octeontx - Fix a potential NULL dereference
        crypto: algboss - don't wait during notifier callback
        crypto: caam - fix typos
        crypto: ccp - Fix sparse warnings in sev-dev
        crypto: hisilicon - Cap block size at 2^31
        crypto: algif_skcipher - Cap recv SG list at ctx->used
        hwrng: ks-sa - Fix runtime PM imbalance on error
      93bbca27
    • Masahiro Yamada's avatar
      samples: watch_queue: build sample program for target architecture · 214377e9
      Masahiro Yamada authored
      This userspace program includes UAPI headers exported to usr/include/.
      'make headers' always works for the target architecture (i.e. the same
      architecture as the kernel), so the sample program should be built for
      the target as well. Kbuild now supports 'userprogs' for that.
      
      I also guarded the CONFIG option by 'depends on CC_CAN_LINK' because
      $(CC) may not provide libc.
      Signed-off-by: default avatarMasahiro Yamada <masahiroy@kernel.org>
      214377e9
    • Masahiro Yamada's avatar
      Revert "Makefile: install modules.builtin even if CONFIG_MODULES=n" · 2c6d9636
      Masahiro Yamada authored
      This reverts commit e0b250b5,
      which broke build systems that need to install files to a certain
      path, but do not set INSTALL_MOD_PATH when invoking 'make install'.
      
        $ make INSTALL_PATH=/tmp/destdir install
        mkdir: cannot create directory ‘/lib/modules/5.8.0-rc1+/’: Permission denied
        Makefile:1342: recipe for target '_builtin_inst_' failed
        make: *** [_builtin_inst_] Error 1
      
      While modules.builtin is useful also for CONFIG_MODULES=n, this change
      in the behavior is quite unexpected. Maybe "make modules_install"
      can install modules.builtin irrespective of CONFIG_MODULES as Jonas
      originally suggested.
      
      Anyway, that commit should be reverted ASAP.
      Reported-by: default avatarDouglas Anderson <dianders@chromium.org>
      Reported-by: default avatarGuenter Roeck <linux@roeck-us.net>
      Cc: Jonas Karlman <jonas@kwiboo.se>
      Signed-off-by: default avatarMasahiro Yamada <masahiroy@kernel.org>
      Reviewed-by: default avatarGuenter Roeck <linux@roeck-us.net>
      Tested-by: default avatarGuenter Roeck <linux@roeck-us.net>
      2c6d9636
    • Linus Torvalds's avatar
      Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi · 64677779
      Linus Torvalds authored
      Pull SCSI fixes from James Bottomley:
       "One minor fix and two patches reworking the ata dma drain for the
        !CONFIG_LIBATA case. The latter is a 5.7 regression fix"
      
      * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
        scsi: Wire up ata_scsi_dma_need_drain for SAS HBA drivers
        scsi: libata: Provide an ata_scsi_dma_need_drain stub for !CONFIG_ATA
        scsi: ufs-bsg: Fix runtime PM imbalance on error
      64677779
    • Linus Torvalds's avatar
      Merge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux · a5c6a1f0
      Linus Torvalds authored
      Pull i2c fixes from Wolfram Sang:
      
       - a small collection of remaining API conversion patches (all acked)
         which allow to finally remove the deprecated API
      
       - some documentation fixes and a MAINTAINERS addition
      
      * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
        MAINTAINERS: Add robert and myself as qcom i2c cci maintainers
        i2c: smbus: Fix spelling mistake in the comments
        Documentation/i2c: SMBus start signal is S not A
        i2c: remove deprecated i2c_new_device API
        Documentation: media: convert to use i2c_new_client_device()
        video: backlight: tosa_lcd: convert to use i2c_new_client_device()
        x86/platform/intel-mid: convert to use i2c_new_client_device()
        drm: encoder_slave: use new I2C API
        drm: encoder_slave: fix refcouting error for modules
      a5c6a1f0
  6. 20 Jun, 2020 1 commit