1. 28 May, 2019 3 commits
    • Linus Torvalds's avatar
      Merge tag 'pinctrl-v5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl · 9fb67d64
      Linus Torvalds authored
      Pull pin control fixes from Linus Walleij:
       "The commits that stand out are the Intel fixes that arrived during the
        merge window and I got relayed by pull request from Andy.
      
        Apart from that a minor Kconfig noise.
      
         - Interrupt clearing fix for the Intel pin controllers affecting
           touchpads on some laptops.
      
         - Compile Kconfig fix for the STMFX expander pin controller"
      
      * tag 'pinctrl-v5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
        pinctrl: stmfx: Fix compile issue when CONFIG_OF_GPIO is not defined
        pinctrl: intel: Clear interrupt status in mask/unmask callback
        pinctrl: intel: Use GENMASK() consistently
      9fb67d64
    • Linus Torvalds's avatar
      Merge tag 'gpio-v5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio · ca6584a3
      Linus Torvalds authored
      Pull GPIO fix from Linus Walleij:
       "Fix a build error in gpio-adp5588"
      
      * tag 'gpio-v5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
        gpio: fix gpio-adp5588 build errors
      ca6584a3
    • Randy Dunlap's avatar
      ia64: fix build errors by exporting paddr_to_nid() · 9a626c4a
      Randy Dunlap authored
      
      
      Fix build errors on ia64 when DISCONTIGMEM=y and NUMA=y by
      exporting paddr_to_nid().
      
      Fixes these build errors:
      
      ERROR: "paddr_to_nid" [sound/core/snd-pcm.ko] undefined!
      ERROR: "paddr_to_nid" [net/sunrpc/sunrpc.ko] undefined!
      ERROR: "paddr_to_nid" [fs/cifs/cifs.ko] undefined!
      ERROR: "paddr_to_nid" [drivers/video/fbdev/core/fb.ko] undefined!
      ERROR: "paddr_to_nid" [drivers/usb/mon/usbmon.ko] undefined!
      ERROR: "paddr_to_nid" [drivers/usb/core/usbcore.ko] undefined!
      ERROR: "paddr_to_nid" [drivers/md/raid1.ko] undefined!
      ERROR: "paddr_to_nid" [drivers/md/dm-mod.ko] undefined!
      ERROR: "paddr_to_nid" [drivers/md/dm-crypt.ko] undefined!
      ERROR: "paddr_to_nid" [drivers/md/dm-bufio.ko] undefined!
      ERROR: "paddr_to_nid" [drivers/ide/ide-core.ko] undefined!
      ERROR: "paddr_to_nid" [drivers/ide/ide-cd_mod.ko] undefined!
      ERROR: "paddr_to_nid" [drivers/gpu/drm/drm.ko] undefined!
      ERROR: "paddr_to_nid" [drivers/char/agp/agpgart.ko] undefined!
      ERROR: "paddr_to_nid" [drivers/block/nbd.ko] undefined!
      ERROR: "paddr_to_nid" [drivers/block/loop.ko] undefined!
      ERROR: "paddr_to_nid" [drivers/block/brd.ko] undefined!
      ERROR: "paddr_to_nid" [crypto/ccm.ko] undefined!
      
      Reported-by: default avatarkbuild test robot <lkp@intel.com>
      Signed-off-by: default avatarRandy Dunlap <rdunlap@infradead.org>
      Cc: Tony Luck <tony.luck@intel.com>
      Cc: Fenghua Yu <fenghua.yu@intel.com>
      Cc: linux-ia64@vger.kernel.org
      Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      9a626c4a
  2. 27 May, 2019 1 commit
  3. 26 May, 2019 6 commits
    • Linus Torvalds's avatar
      Linux 5.2-rc2 · cd6c84d8
      Linus Torvalds authored
      cd6c84d8
    • Linus Torvalds's avatar
      Merge tag 'trace-v5.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace · c5b44095
      Linus Torvalds authored
      Pull tracing warning fix from Steven Rostedt:
       "Make the GCC 9 warning for sub struct memset go away.
      
        GCC 9 now warns about calling memset() on partial structures when it
        goes across multiple fields. This adds a helper for the place in
        tracing that does this type of clearing of a structure"
      
      * tag 'trace-v5.2-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
        tracing: Silence GCC 9 array bounds warning
      c5b44095
    • Linus Torvalds's avatar
      Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm · 862f0a32
      Linus Torvalds authored
      Pull KVM fixes from Paolo Bonzini:
       "The usual smattering of fixes and tunings that came in too late for
        the merge window, but should not wait four months before they appear
        in a release.
      
        I also travelled a bit more than usual in the first part of May, which
        didn't help with picking up patches and reports promptly"
      
      * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (33 commits)
        KVM: x86: fix return value for reserved EFER
        tools/kvm_stat: fix fields filter for child events
        KVM: selftests: Wrap vcpu_nested_state_get/set functions with x86 guard
        kvm: selftests: aarch64: compile with warnings on
        kvm: selftests: aarch64: fix default vm mode
        kvm: selftests: aarch64: dirty_log_test: fix unaligned memslot size
        KVM: s390: fix memory slot handling for KVM_SET_USER_MEMORY_REGION
        KVM: x86/pmu: do not mask the value that is written to fixed PMUs
        KVM: x86/pmu: mask the result of rdpmc according to the width of the counters
        x86/kvm/pmu: Set AMD's virt PMU version to 1
        KVM: x86: do not spam dmesg with VMCS/VMCB dumps
        kvm: Check irqchip mode before assign irqfd
        kvm: svm/avic: fix off-by-one in checking host APIC ID
        KVM: selftests: do not blindly clobber registers in guest asm
        KVM: selftests: Remove duplicated TEST_ASSERT in hyperv_cpuid.c
        KVM: LAPIC: Expose per-vCPU timer_advance_ns to userspace
        KVM: LAPIC: Fix lapic_timer_advance_ns parameter overflow
        kvm: vmx: Fix -Wmissing-prototypes warnings
        KVM: nVMX: Fix using __this_cpu_read() in preemptible context
        kvm: fix compilation on s390
        ...
      862f0a32
    • Linus Torvalds's avatar
      Merge tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random · 128f2bfa
      Linus Torvalds authored
      Pull /dev/random fix from Ted Ts'o:
       "Fix a soft lockup regression when reading from /dev/random in early
        boot"
      
      * tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
        random: fix soft lockup when trying to read from an uninitialized blocking pool
      128f2bfa
    • Theodore Ts'o's avatar
      random: fix soft lockup when trying to read from an uninitialized blocking pool · 58be0106
      Theodore Ts'o authored
      Fixes: eb9d1bf0
      
      : "random: only read from /dev/random after its pool has received 128 bits"
      Reported-by: default avatarkernel test robot <lkp@intel.com>
      Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
      58be0106
    • Miguel Ojeda's avatar
      tracing: Silence GCC 9 array bounds warning · 0c97bf86
      Miguel Ojeda authored
      Starting with GCC 9, -Warray-bounds detects cases when memset is called
      starting on a member of a struct but the size to be cleared ends up
      writing over further members.
      
      Such a call happens in the trace code to clear, at once, all members
      after and including `seq` on struct trace_iterator:
      
          In function 'memset',
              inlined from 'ftrace_dump' at kernel/trace/trace.c:8914:3:
          ./include/linux/string.h:344:9: warning: '__builtin_memset' offset
          [8505, 8560] from the object at 'iter' is out of the bounds of
          referenced subobject 'seq' with type 'struct trace_seq' at offset
          4368 [-Warray-bounds]
            344 |  return __builtin_memset(p, c, size);
                |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
      
      In order to avoid GCC complaining about it, we compute the address
      ourselves by adding the offsetof distance instead of referring
      directly to the member.
      
      Since there are two places doing this clear (trace.c and trace_kdb.c),
      take the chance to move the workaround into a single place in
      the internal header.
      
      Link: http://lkml.kernel.org/r/20190523124535.GA12931@gmail.com
      
      
      
      Signed-off-by: default avatarMiguel Ojeda <miguel.ojeda.sandonis@gmail.com>
      [ Removed unnecessary parenthesis around "iter" ]
      Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
      0c97bf86
  4. 25 May, 2019 5 commits
  5. 24 May, 2019 25 commits
    • Linus Torvalds's avatar
      Merge tag 'for-linus-20190524' of git://git.kernel.dk/linux-block · 7fbc78e3
      Linus Torvalds authored
      Pull block fixes from Jens Axboe:
      
       - NVMe pull request from Keith, with fixes from a few folks.
      
       - bio and sbitmap before atomic barrier fixes (Andrea)
      
       - Hang fix for blk-mq freeze and unfreeze (Bob)
      
       - Single segment count regression fix (Christoph)
      
       - AoE now has a new maintainer
      
       - tools/io_uring/ Makefile fix, and sync with liburing (me)
      
      * tag 'for-linus-20190524' of git://git.kernel.dk/linux-block: (23 commits)
        tools/io_uring: sync with liburing
        tools/io_uring: fix Makefile for pthread library link
        blk-mq: fix hang caused by freeze/unfreeze sequence
        block: remove the bi_seg_{front,back}_size fields in struct bio
        block: remove the segment size check in bio_will_gap
        block: force an unlimited segment size on queues with a virt boundary
        block: don't decrement nr_phys_segments for physically contigous segments
        sbitmap: fix improper use of smp_mb__before_atomic()
        bio: fix improper use of smp_mb__before_atomic()
        aoe: list new maintainer for aoe driver
        nvme-pci: use blk-mq mapping for unmanaged irqs
        nvme: update MAINTAINERS
        nvme: copy MTFA field from identify controller
        nvme: fix memory leak for power latency tolerance
        nvme: release namespace SRCU protection before performing controller ioctls
        nvme: merge nvme_ns_ioctl into nvme_ioctl
        nvme: remove the ifdef around nvme_nvm_ioctl
        nvme: fix srcu locking on error return in nvme_get_ns_from_disk
        nvme: Fix known effects
        nvme-pci: Sync queues on reset
        ...
      7fbc78e3
    • Linus Torvalds's avatar
      Merge tag 'linux-kselftest-5.2-rc2' of... · 7f8b40e3
      Linus Torvalds authored
      Merge tag 'linux-kselftest-5.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest
      
      Pull Kselftest fixes from Shuah Khan:
      
       - Two fixes to regressions introduced in kselftest Makefile test run
         output refactoring work (Kees Cook)
      
       - Adding Atom support to syscall_arg_fault test (Tong Bo)
      
      * tag 'linux-kselftest-5.2-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
        selftests/timers: Add missing fflush(stdout) calls
        selftests: Remove forced unbuffering for test running
        selftests/x86: Support Atom for syscall_arg_fault test
      7f8b40e3
    • Linus Torvalds's avatar
      Merge tag 'devicetree-fixes-for-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux · e7bd3e24
      Linus Torvalds authored
      Pull Devicetree fixes from Rob Herring:
      
       - Update checkpatch.pl to use DT vendor-prefixes.yaml
      
       - Fix DT binding references to files converted to DT schema
      
       - Clean-up Arm CPU binding examples to match schema
      
       - Add Sifive block versioning scheme documentation
      
       - Pass binding directory base to validation tools for reference lookups
      
      * tag 'devicetree-fixes-for-5.2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
        checkpatch.pl: Update DT vendor prefix check
        dt: bindings: mtd: replace references to nand.txt with nand-controller.yaml
        dt-bindings: interrupt-controller: arm,gic: Fix schema errors in example
        dt-bindings: arm: Clean up CPU binding examples
        dt: fix refs that were renamed to json with the same file name
        dt-bindings: Pass binding directory to validation tools
        dt-bindings: sifive: describe sifive-blocks versioning
      e7bd3e24
    • Linus Torvalds's avatar
      Merge tag 'spdx-5.2-rc2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core · 86c2f5d6
      Linus Torvalds authored
      Pule more SPDX updates from Greg KH:
       "Here is another set of reviewed patches that adds SPDX tags to
        different kernel files, based on a set of rules that are being used to
        parse the comments to try to determine that the license of the file is
        "GPL-2.0-or-later".
      
        Only the "obvious" versions of these matches are included here, a
        number of "non-obvious" variants of text have been found but those
        have been postponed for later review and analysis.
      
        These patches have been out for review on the linux-spdx@vger mailing
        list, and while they were created by automatic tools, they were
        hand-verified by a bunch of different people, all whom names are on
        the patches are reviewers"
      
      * tag 'spdx-5.2-rc2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (85 commits)
        treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 125
        treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 123
        treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 122
        treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 121
        treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 120
        treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 119
        treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 118
        treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 116
        treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 114
        treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 113
        treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 112
        treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 111
        treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 110
        treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 106
        treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 105
        treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 104
        treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 103
        treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 102
        treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 101
        treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 98
        ...
      86c2f5d6
    • Waiman Long's avatar
      locking/lock_events: Use this_cpu_add() when necessary · 51816e9e
      Waiman Long authored
      The kernel test robot has reported that the use of __this_cpu_add()
      causes bug messages like:
      
        BUG: using __this_cpu_add() in preemptible [00000000] code: ...
      
      Given the imprecise nature of the count and the possibility of resetting
      the count and doing the measurement again, this is not really a big
      problem to use the unprotected __this_cpu_*() functions.
      
      To make the preemption checking code happy, the this_cpu_*() functions
      will be used if CONFIG_DEBUG_PREEMPT is defined.
      
      The imprecise nature of the locking counts are also documented with
      the suggestion that we should run the measurement a few times with the
      counts reset in between to get a better picture of what is going on
      under the hood.
      
      Fixes: a8654596
      
       ("locking/rwsem: Enable lock event counting")
      Suggested-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      Signed-off-by: default avatarWaiman Long <longman@redhat.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      51816e9e
    • Paolo Bonzini's avatar
      KVM: x86: fix return value for reserved EFER · 66f61c92
      Paolo Bonzini authored
      Commit 11988499
      
       ("KVM: x86: Skip EFER vs. guest CPUID checks for
      host-initiated writes", 2019-04-02) introduced a "return false" in a
      function returning int, and anyway set_efer has a "nonzero on error"
      conventon so it should be returning 1.
      
      Reported-by: default avatarPavel Machek <pavel@denx.de>
      Fixes: 11988499
      
       ("KVM: x86: Skip EFER vs. guest CPUID checks for host-initiated writes")
      Cc: Sean Christopherson <sean.j.christopherson@intel.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      66f61c92
    • Stefan Raspl's avatar
      tools/kvm_stat: fix fields filter for child events · 883d25e7
      Stefan Raspl authored
      
      
      The fields filter would not work with child fields, as the respective
      parents would not be included. No parents displayed == no childs displayed.
      To reproduce, run on s390 (would work on other platforms, too, but would
      require a different filter name):
      - Run 'kvm_stat -d'
      - Press 'f'
      - Enter 'instruct'
      Notice that events like instruction_diag_44 or instruction_diag_500 are not
      displayed - the output remains empty.
      With this patch, we will filter by matching events and their parents.
      However, consider the following example where we filter by
      instruction_diag_44:
      
        kvm statistics - summary
                         regex filter: instruction_diag_44
         Event                                         Total %Total CurAvg/s
         exit_instruction                                276  100.0       12
           instruction_diag_44                           256   92.8       11
         Total                                           276              12
      
      Note that the parent ('exit_instruction') displays the total events, but
      the childs listed do not match its total (256 instead of 276). This is
      intended (since we're filtering all but one child), but might be confusing
      on first sight.
      
      Signed-off-by: default avatarStefan Raspl <raspl@linux.ibm.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      883d25e7
    • Thomas Huth's avatar
      KVM: selftests: Wrap vcpu_nested_state_get/set functions with x86 guard · c7957206
      Thomas Huth authored
      
      
      struct kvm_nested_state is only available on x86 so far. To be able
      to compile the code on other architectures as well, we need to wrap
      the related code with #ifdefs.
      
      Signed-off-by: default avatarThomas Huth <thuth@redhat.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      c7957206
    • Andrew Jones's avatar
      kvm: selftests: aarch64: compile with warnings on · 98e68344
      Andrew Jones authored
      
      
      aarch64 fixups needed to compile with warnings as errors.
      
      Reviewed-by: default avatarThomas Huth <thuth@redhat.com>
      Signed-off-by: Andrew Jones's avatarAndrew Jones <drjones@redhat.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      98e68344
    • Andrew Jones's avatar
      kvm: selftests: aarch64: fix default vm mode · 55eda003
      Andrew Jones authored
      
      
      VM_MODE_P52V48_4K is not a valid mode for AArch64. Replace its
      use in vm_create_default() with a mode that works and represents
      a good AArch64 default. (We didn't ever see a problem with this
      because we don't have any unit tests using vm_create_default(),
      but it's good to get it fixed in advance.)
      
      Reported-by: default avatarThomas Huth <thuth@redhat.com>
      Signed-off-by: Andrew Jones's avatarAndrew Jones <drjones@redhat.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      55eda003
    • Andrew Jones's avatar
      kvm: selftests: aarch64: dirty_log_test: fix unaligned memslot size · bffed38d
      Andrew Jones authored
      The memory slot size must be aligned to the host's page size. When
      testing a guest with a 4k page size on a host with a 64k page size,
      then 3 guest pages are not host page size aligned. Since we just need
      a nearly arbitrary number of extra pages to ensure the memslot is not
      aligned to a 64 host-page boundary for this test, then we can use
      16, as that's 64k aligned, but not 64 * 64k aligned.
      
      Fixes: 76d58e0f
      
       ("KVM: fix KVM_CLEAR_DIRTY_LOG for memory slots of unaligned size", 2019-04-17)
      Signed-off-by: Andrew Jones's avatarAndrew Jones <drjones@redhat.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      bffed38d
    • Christian Borntraeger's avatar
      KVM: s390: fix memory slot handling for KVM_SET_USER_MEMORY_REGION · 19ec166c
      Christian Borntraeger authored
      
      
      kselftests exposed a problem in the s390 handling for memory slots.
      Right now we only do proper memory slot handling for creation of new
      memory slots. Neither MOVE, nor DELETION are handled properly. Let us
      implement those.
      
      Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      19ec166c
    • Paolo Bonzini's avatar
      KVM: x86/pmu: do not mask the value that is written to fixed PMUs · 2924b521
      Paolo Bonzini authored
      
      
      According to the SDM, for MSR_IA32_PERFCTR0/1 "the lower-order 32 bits of
      each MSR may be written with any value, and the high-order 8 bits are
      sign-extended according to the value of bit 31", but the fixed counters
      in real hardware are limited to the width of the fixed counters ("bits
      beyond the width of the fixed-function counter are reserved and must be
      written as zeros").  Fix KVM to do the same.
      
      Reported-by: default avatarNadav Amit <nadav.amit@gmail.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      2924b521
    • Paolo Bonzini's avatar
      KVM: x86/pmu: mask the result of rdpmc according to the width of the counters · 0e6f467e
      Paolo Bonzini authored
      
      
      This patch will simplify the changes in the next, by enforcing the
      masking of the counters to RDPMC and RDMSR.
      
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      0e6f467e
    • Borislav Petkov's avatar
      x86/kvm/pmu: Set AMD's virt PMU version to 1 · a80c4ec1
      Borislav Petkov authored
      After commit:
      
        672ff6cf
      
       ("KVM: x86: Raise #GP when guest vCPU do not support PMU")
      
      my AMD guests started #GPing like this:
      
        general protection fault: 0000 [#1] PREEMPT SMP
        CPU: 1 PID: 4355 Comm: bash Not tainted 5.1.0-rc6+ #3
        Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
        RIP: 0010:x86_perf_event_update+0x3b/0xa0
      
      with Code: pointing to RDPMC. It is RDPMC because the guest has the
      hardware watchdog CONFIG_HARDLOCKUP_DETECTOR_PERF enabled which uses
      perf. Instrumenting kvm_pmu_rdpmc() some, showed that it fails due to:
      
        if (!pmu->version)
        	return 1;
      
      which the above commit added. Since AMD's PMU leaves the version at 0,
      that causes the #GP injection into the guest.
      
      Set pmu->version arbitrarily to 1 and move it above the non-applicable
      struct kvm_pmu members.
      
      Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Janakarajan Natarajan <Janakarajan.Natarajan@amd.com>
      Cc: kvm@vger.kernel.org
      Cc: Liran Alon <liran.alon@oracle.com>
      Cc: Mihai Carabas <mihai.carabas@oracle.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Tom Lendacky <thomas.lendacky@amd.com>
      Cc: x86@kernel.org
      Cc: stable@vger.kernel.org
      Fixes: 672ff6cf
      
       ("KVM: x86: Raise #GP when guest vCPU do not support PMU")
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      a80c4ec1
    • Paolo Bonzini's avatar
      KVM: x86: do not spam dmesg with VMCS/VMCB dumps · 6f2f8453
      Paolo Bonzini authored
      
      
      Userspace can easily set up invalid processor state in such a way that
      dmesg will be filled with VMCS or VMCB dumps.  Disable this by default
      using a module parameter.
      
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      6f2f8453
    • Peter Xu's avatar
      kvm: Check irqchip mode before assign irqfd · 654f1f13
      Peter Xu authored
      
      
      When assigning kvm irqfd we didn't check the irqchip mode but we allow
      KVM_IRQFD to succeed with all the irqchip modes.  However it does not
      make much sense to create irqfd even without the kernel chips.  Let's
      provide a arch-dependent helper to check whether a specific irqfd is
      allowed by the arch.  At least for x86, it should make sense to check:
      
      - when irqchip mode is NONE, all irqfds should be disallowed, and,
      
      - when irqchip mode is SPLIT, irqfds that are with resamplefd should
        be disallowed.
      
      For either of the case, previously we'll silently ignore the irq or
      the irq ack event if the irqchip mode is incorrect.  However that can
      cause misterious guest behaviors and it can be hard to triage.  Let's
      fail KVM_IRQFD even earlier to detect these incorrect configurations.
      
      CC: Paolo Bonzini <pbonzini@redhat.com>
      CC: Radim Krčmář <rkrcmar@redhat.com>
      CC: Alex Williamson <alex.williamson@redhat.com>
      CC: Eduardo Habkost <ehabkost@redhat.com>
      Signed-off-by: default avatarPeter Xu <peterx@redhat.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      654f1f13
    • Suthikulpanit, Suravee's avatar
      kvm: svm/avic: fix off-by-one in checking host APIC ID · c9bcd3e3
      Suthikulpanit, Suravee authored
      
      
      Current logic does not allow VCPU to be loaded onto CPU with
      APIC ID 255. This should be allowed since the host physical APIC ID
      field in the AVIC Physical APIC table entry is an 8-bit value,
      and APIC ID 255 is valid in system with x2APIC enabled.
      Instead, do not allow VCPU load if the host APIC ID cannot be
      represented by an 8-bit value.
      
      Also, use the more appropriate AVIC_PHYSICAL_ID_ENTRY_HOST_PHYSICAL_ID_MASK
      instead of AVIC_MAX_PHYSICAL_ID_COUNT.
      
      Signed-off-by: default avatarSuravee Suthikulpanit <suravee.suthikulpanit@amd.com>
      Cc: stable@vger.kernel.org
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      c9bcd3e3
    • Paolo Bonzini's avatar
      KVM: selftests: do not blindly clobber registers in guest asm · 204c91ef
      Paolo Bonzini authored
      
      
      The guest_code of sync_regs_test is assuming that the compiler will not
      touch %r11 outside the asm that increments it, which is a bit brittle.
      Instead, we can increment a variable and use a dummy asm to ensure the
      increment is not optimized away.  However, we also need to use a
      callee-save register or the compiler will insert a save/restore around
      the vmexit, breaking the whole idea behind the test.
      
      (Yes, "if it ain't broken...", but I would like the test to be clean
      before it is copied into the upcoming s390 selftests).
      
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      204c91ef
    • Thomas Huth's avatar
      KVM: selftests: Remove duplicated TEST_ASSERT in hyperv_cpuid.c · 12e9612c
      Thomas Huth authored
      
      
      The check for entry->index == 0 is done twice. One time should
      be sufficient.
      
      Suggested-by: default avatarVitaly Kuznetsov <vkuznets@redhat.com>
      Signed-off-by: default avatarThomas Huth <thuth@redhat.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      12e9612c
    • Wanpeng Li's avatar
      KVM: LAPIC: Expose per-vCPU timer_advance_ns to userspace · 16ba3ab4
      Wanpeng Li authored
      
      
      Expose per-vCPU timer_advance_ns to userspace, so it is able to
      query the auto-adjusted value.
      
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: Radim Krčmář <rkrcmar@redhat.com>
      Cc: Sean Christopherson <sean.j.christopherson@intel.com>
      Cc: Liran Alon <liran.alon@oracle.com>
      Signed-off-by: default avatarWanpeng Li <wanpengli@tencent.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      16ba3ab4
    • Wanpeng Li's avatar
      KVM: LAPIC: Fix lapic_timer_advance_ns parameter overflow · 0e6edceb
      Wanpeng Li authored
      After commit c3941d9e (KVM: lapic: Allow user to disable adaptive tuning of
      timer advancement), '-1' enables adaptive tuning starting from default
      advancment of 1000ns. However, we should expose an int instead of an overflow
      uint module parameter.
      
      Before patch:
      
      /sys/module/kvm/parameters/lapic_timer_advance_ns:4294967295
      
      After patch:
      
      /sys/module/kvm/parameters/lapic_timer_advance_ns:-1
      
      Fixes: c3941d9e
      
       (KVM: lapic: Allow user to disable adaptive tuning of timer advancement)
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: Radim Krčmář <rkrcmar@redhat.com>
      Cc: Sean Christopherson <sean.j.christopherson@intel.com>
      Cc: Liran Alon <liran.alon@oracle.com>
      Reviewed-by: default avatarSean Christopherson <sean.j.christopherson@intel.com>
      Signed-off-by: default avatarWanpeng Li <wanpengli@tencent.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      0e6edceb
    • Yi Wang's avatar
      kvm: vmx: Fix -Wmissing-prototypes warnings · 4d259965
      Yi Wang authored
      
      
      We get a warning when build kernel W=1:
      arch/x86/kvm/vmx/vmx.c:6365:6: warning: no previous prototype for ‘vmx_update_host_rsp’ [-Wmissing-prototypes]
       void vmx_update_host_rsp(struct vcpu_vmx *vmx, unsigned long host_rsp)
      
      Add the missing declaration to fix this.
      
      Signed-off-by: default avatarYi Wang <wang.yi59@zte.com.cn>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      4d259965
    • Wanpeng Li's avatar
      KVM: nVMX: Fix using __this_cpu_read() in preemptible context · 541e886f
      Wanpeng Li authored
      
      
       BUG: using __this_cpu_read() in preemptible [00000000] code: qemu-system-x86/4590
        caller is nested_vmx_enter_non_root_mode+0xebd/0x1790 [kvm_intel]
        CPU: 4 PID: 4590 Comm: qemu-system-x86 Tainted: G           OE     5.1.0-rc4+ #1
        Call Trace:
         dump_stack+0x67/0x95
         __this_cpu_preempt_check+0xd2/0xe0
         nested_vmx_enter_non_root_mode+0xebd/0x1790 [kvm_intel]
         nested_vmx_run+0xda/0x2b0 [kvm_intel]
         handle_vmlaunch+0x13/0x20 [kvm_intel]
         vmx_handle_exit+0xbd/0x660 [kvm_intel]
         kvm_arch_vcpu_ioctl_run+0xa2c/0x1e50 [kvm]
         kvm_vcpu_ioctl+0x3ad/0x6d0 [kvm]
         do_vfs_ioctl+0xa5/0x6e0
         ksys_ioctl+0x6d/0x80
         __x64_sys_ioctl+0x1a/0x20
         do_syscall_64+0x6f/0x6c0
         entry_SYSCALL_64_after_hwframe+0x49/0xbe
      
      Accessing per-cpu variable should disable preemption, this patch extends the
      preemption disable region for __this_cpu_read().
      
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: Radim Krčmář <rkrcmar@redhat.com>
      Signed-off-by: default avatarWanpeng Li <wanpengli@tencent.com>
      Fixes: 52017608
      
       ("KVM: nVMX: add option to perform early consistency checks via H/W")
      Cc: stable@vger.kernel.org
      Reviewed-by: default avatarSean Christopherson <sean.j.christopherson@intel.com>
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      541e886f
    • Paolo Bonzini's avatar
      kvm: fix compilation on s390 · d30b214d
      Paolo Bonzini authored
      
      
      s390 does not have memremap, even though in this particular case it
      would be useful.
      
      Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
      d30b214d