diff options
| author | Sean Christopherson <seanjc@google.com> | 2022-11-30 23:09:27 +0000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-12-29 15:48:33 -0500 |
| commit | 2c106f29004d2a6dbdc375cd9c0c8f981f475f47 (patch) | |
| tree | 5b774ab33f109c776926b0f5a4792190292c4f20 /virt | |
| parent | e4aa7f88af1a123863530af4a238ce64ec8fad5a (diff) | |
| download | lwn-2c106f29004d2a6dbdc375cd9c0c8f981f475f47.tar.gz lwn-2c106f29004d2a6dbdc375cd9c0c8f981f475f47.zip | |
KVM: Ensure CPU is stable during low level hardware enable/disable
Use the non-raw smp_processor_id() in the low hardware enable/disable
helpers as KVM absolutely relies on the CPU being stable, e.g. KVM would
end up with incorrect state if the task were migrated between accessing
cpus_hardware_enabled and actually enabling/disabling hardware.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20221130230934.1014142-44-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/kvm_main.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 2d6203ecab88..0c3b9d6fa1b1 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -5097,7 +5097,7 @@ static struct miscdevice kvm_dev = { static void hardware_enable_nolock(void *junk) { - int cpu = raw_smp_processor_id(); + int cpu = smp_processor_id(); int r; if (cpumask_test_cpu(cpu, cpus_hardware_enabled)) @@ -5139,7 +5139,7 @@ static int kvm_online_cpu(unsigned int cpu) static void hardware_disable_nolock(void *junk) { - int cpu = raw_smp_processor_id(); + int cpu = smp_processor_id(); if (!cpumask_test_cpu(cpu, cpus_hardware_enabled)) return; |