linux.git/virt, branch v5.15-rc2 Linux kernel source tree KVM: Drop unused kvm_dirty_gfn_invalid() 2021-09-06T12:23:46+00:00 Peter Xu peterx@redhat.com 2021-09-01T23:09:04+00:00 109bbba5066b42431399b40e947243f049d8dc8d Drop the unused function as reported by test bot. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <20210901230904.15164-1-peterx@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> 
Drop the unused function as reported by test bot.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20210901230904.15164-1-peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Merge tag 'kvmarm-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD 2021-09-06T10:34:48+00:00 Paolo Bonzini pbonzini@redhat.com 2021-09-06T10:34:11+00:00 e99314a340d27efafab3b7ea226beb239162cd46 KVM/arm64 updates for 5.15 - Page ownership tracking between host EL1 and EL2 - Rely on userspace page tables to create large stage-2 mappings - Fix incompatibility between pKVM and kmemleak - Fix the PMU reset state, and improve the performance of the virtual PMU - Move over to the generic KVM entry code - Address PSCI reset issues w.r.t. save/restore - Preliminary rework for the upcoming pKVM fixed feature - A bunch of MM cleanups - a vGIC fix for timer spurious interrupts - Various cleanups 
KVM/arm64 updates for 5.15

- Page ownership tracking between host EL1 and EL2

- Rely on userspace page tables to create large stage-2 mappings

- Fix incompatibility between pKVM and kmemleak

- Fix the PMU reset state, and improve the performance of the virtual PMU

- Move over to the generic KVM entry code

- Address PSCI reset issues w.r.t. save/restore

- Preliminary rework for the upcoming pKVM fixed feature

- A bunch of MM cleanups

- a vGIC fix for timer spurious interrupts

- Various cleanups
KVM: stats: Add VM stat for remote tlb flush requests 2021-09-06T10:30:45+00:00 Jing Zhang jingzhangos@google.com 2021-08-17T00:26:39+00:00 3cc4e148b96263313e3dce926eae569c942bb74e Add a new stat that counts the number of times a remote TLB flush is requested, regardless of whether it kicks vCPUs out of guest mode. This allows us to look at how often flushes are initiated. Unlike remote_tlb_flush, this one applies to ARM's instruction-set-based TLB flush implementation, so apply it there too. Original-by: David Matlack <dmatlack@google.com> Signed-off-by: Jing Zhang <jingzhangos@google.com> Message-Id: <20210817002639.3856694-1-jingzhangos@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> 
Add a new stat that counts the number of times a remote TLB flush is
requested, regardless of whether it kicks vCPUs out of guest mode. This
allows us to look at how often flushes are initiated.

Unlike remote_tlb_flush, this one applies to ARM's instruction-set-based
TLB flush implementation, so apply it there too.

Original-by: David Matlack <dmatlack@google.com>
Signed-off-by: Jing Zhang <jingzhangos@google.com>
Message-Id: <20210817002639.3856694-1-jingzhangos@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM: Remove unnecessary export of kvm_{inc,dec}_notifier_count() 2021-09-06T10:21:29+00:00 Sean Christopherson seanjc@google.com 2021-09-02T17:59:51+00:00 fdde13c13f9012b22e1b3a1df8a108d147842f6f Don't export KVM's MMU notifier count helpers, under no circumstance should any downstream module, including x86's vendor code, have a legitimate reason to piggyback KVM's MMU notifier logic. E.g in the x86 case, only KVM's MMU should be elevating the notifier count, and that code is always built into the core kvm.ko module. Fixes: edb298c663fc ("KVM: x86/mmu: bump mmu notifier count in kvm_zap_gfn_range") Cc: Maxim Levitsky <mlevitsk@redhat.com> Signed-off-by: Sean Christopherson <seanjc@google.com> Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com> Message-Id: <20210902175951.1387989-1-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> 
Don't export KVM's MMU notifier count helpers, under no circumstance
should any downstream module, including x86's vendor code, have a
legitimate reason to piggyback KVM's MMU notifier logic.  E.g in the x86
case, only KVM's MMU should be elevating the notifier count, and that
code is always built into the core kvm.ko module.

Fixes: edb298c663fc ("KVM: x86/mmu: bump mmu notifier count in kvm_zap_gfn_range")
Cc: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20210902175951.1387989-1-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM: stats: Add halt polling related histogram stats 2021-08-20T20:06:33+00:00 Jing Zhang jingzhangos@google.com 2021-08-02T16:56:33+00:00 8ccba534a1a5c6565220c81113d6157571f380cb Add three log histogram stats to record the distribution of time spent on successful polling, failed polling and VCPU wait. halt_poll_success_hist: Distribution of spent time for a successful poll. halt_poll_fail_hist: Distribution of spent time for a failed poll. halt_wait_hist: Distribution of time a VCPU has spent on waiting. Signed-off-by: Jing Zhang <jingzhangos@google.com> Message-Id: <20210802165633.1866976-6-jingzhangos@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> 
Add three log histogram stats to record the distribution of time spent
on successful polling, failed polling and VCPU wait.
halt_poll_success_hist: Distribution of spent time for a successful poll.
halt_poll_fail_hist: Distribution of spent time for a failed poll.
halt_wait_hist: Distribution of time a VCPU has spent on waiting.

Signed-off-by: Jing Zhang <jingzhangos@google.com>
Message-Id: <20210802165633.1866976-6-jingzhangos@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM: stats: Add halt_wait_ns stats for all architectures 2021-08-20T20:06:33+00:00 Jing Zhang jingzhangos@google.com 2021-08-02T16:56:32+00:00 87bcc5fa092f82a9890f9e73e4f4c7016ef64049 Add simple stats halt_wait_ns to record the time a VCPU has spent on waiting for all architectures (not just powerpc). Signed-off-by: Jing Zhang <jingzhangos@google.com> Message-Id: <20210802165633.1866976-5-jingzhangos@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> 
Add simple stats halt_wait_ns to record the time a VCPU has spent on
waiting for all architectures (not just powerpc).

Signed-off-by: Jing Zhang <jingzhangos@google.com>
Message-Id: <20210802165633.1866976-5-jingzhangos@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM: x86/mmu: bump mmu notifier count in kvm_zap_gfn_range 2021-08-20T20:06:19+00:00 Maxim Levitsky mlevitsk@redhat.com 2021-08-10T20:52:39+00:00 edb298c663fccad65fe99fcec6a4f96cc344520d This together with previous patch, ensures that kvm_zap_gfn_range doesn't race with page fault running on another vcpu, and will make this page fault code retry instead. This is based on a patch suggested by Sean Christopherson: https://lkml.org/lkml/2021/7/22/1025 Suggested-by: Sean Christopherson <seanjc@google.com> Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com> Message-Id: <20210810205251.424103-5-mlevitsk@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> 
This together with previous patch, ensures that
kvm_zap_gfn_range doesn't race with page fault
running on another vcpu, and will make this page fault code
retry instead.

This is based on a patch suggested by Sean Christopherson:
https://lkml.org/lkml/2021/7/22/1025

Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Message-Id: <20210810205251.424103-5-mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM: Allow to have arch-specific per-vm debugfs files 2021-08-13T07:35:17+00:00 Peter Xu peterx@redhat.com 2021-07-30T22:04:49+00:00 3165af738ed3224a84ead7d97c6909de2e453b4c Allow archs to create arch-specific nodes under kvm->debugfs_dentry directory besides the stats fields. The new interface kvm_arch_create_vm_debugfs() is defined but not yet used. It's called after kvm->debugfs_dentry is created, so it can be referenced directly in kvm_arch_create_vm_debugfs(). Arch should define their own versions when they want to create extra debugfs nodes. Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <20210730220455.26054-2-peterx@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> 
Allow archs to create arch-specific nodes under kvm->debugfs_dentry directory
besides the stats fields.  The new interface kvm_arch_create_vm_debugfs() is
defined but not yet used.  It's called after kvm->debugfs_dentry is created, so
it can be referenced directly in kvm_arch_create_vm_debugfs().  Arch should
define their own versions when they want to create extra debugfs nodes.

Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20210730220455.26054-2-peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM: stats: remove dead stores 2021-08-13T07:35:15+00:00 Paolo Bonzini pbonzini@redhat.com 2021-08-10T10:21:30+00:00 ee3b6e41bc26c628b0c06aacd2758a316fe583be These stores are copied and pasted from the "if" statements above. They are dead and while they are not really a bug, they can be confusing to anyone reading the code as well. Remove them. Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> 
These stores are copied and pasted from the "if" statements above.
They are dead and while they are not really a bug, they can be
confusing to anyone reading the code as well.  Remove them.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Merge branch 'kvm-vmx-secctl' into HEAD 2021-08-10T17:45:26+00:00 Paolo Bonzini pbonzini@redhat.com 2021-08-10T17:45:26+00:00 c3e9434c9852c09cd1756b05d1474b7c84452819 Merge common topic branch for 5.14-rc6 and 5.15 merge window. 
Merge common topic branch for 5.14-rc6 and 5.15 merge window.