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author | Oliver Upton <oupton@google.com> | 2021-08-02 19:28:07 +0000 |
---|---|---|
committer | Marc Zyngier <maz@kernel.org> | 2021-08-19 11:19:41 +0100 |
commit | fe5161d2c39b8c2801f0e786631460c6e8a1cae4 (patch) | |
tree | c119bf6993ab80db21ca5eb0172d1210ddd2f3d0 /arch/arm64 | |
parent | c500bee1c5b2f1d59b1081ac879d73268ab0ff17 (diff) | |
download | linux-stable-fe5161d2c39b8c2801f0e786631460c6e8a1cae4.tar.gz linux-stable-fe5161d2c39b8c2801f0e786631460c6e8a1cae4.tar.bz2 linux-stable-fe5161d2c39b8c2801f0e786631460c6e8a1cae4.zip |
KVM: arm64: Record number of signal exits as a vCPU stat
Most other architectures that implement KVM record a statistic
indicating the number of times a vCPU has exited due to a pending
signal. Add support for that stat to arm64.
Reviewed-by: Jing Zhang <jingzhangos@google.com>
Signed-off-by: Oliver Upton <oupton@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210802192809.1851010-2-oupton@google.com
Diffstat (limited to 'arch/arm64')
-rw-r--r-- | arch/arm64/include/asm/kvm_host.h | 1 | ||||
-rw-r--r-- | arch/arm64/kvm/arm.c | 1 | ||||
-rw-r--r-- | arch/arm64/kvm/guest.c | 1 |
3 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 41911585ae0c..70e129f2b574 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -576,6 +576,7 @@ struct kvm_vcpu_stat { u64 wfi_exit_stat; u64 mmio_exit_user; u64 mmio_exit_kernel; + u64 signal_exits; u64 exits; }; diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index e9a2b8f27792..60d0a546d7fd 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -783,6 +783,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu) if (signal_pending(current)) { ret = -EINTR; run->exit_reason = KVM_EXIT_INTR; + ++vcpu->stat.signal_exits; } /* diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c index 1dfb83578277..853d1e8d2e73 100644 --- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -50,6 +50,7 @@ const struct _kvm_stats_desc kvm_vcpu_stats_desc[] = { STATS_DESC_COUNTER(VCPU, wfi_exit_stat), STATS_DESC_COUNTER(VCPU, mmio_exit_user), STATS_DESC_COUNTER(VCPU, mmio_exit_kernel), + STATS_DESC_COUNTER(VCPU, signal_exits), STATS_DESC_COUNTER(VCPU, exits) }; static_assert(ARRAY_SIZE(kvm_vcpu_stats_desc) == |