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| author |   Sean Christopherson <seanjc@google.com> | 2023-06-06 17:43:10 -0700 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2023-08-02 16:37:30 -0700 |
| commit | 550ba57faa04042956079b8d09ec0f83bef8817f (patch) | |
| tree | 654e9bcb1e3101bc055bfa0d638bebe260981100 /arch/x86/kvm/lapic.c | |
| parent | KVM: x86: Snapshot host's MSR_IA32_ARCH_CAPABILITIES (diff) | |
| download | wireguard-linux-550ba57faa04042956079b8d09ec0f83bef8817f.tar.xz wireguard-linux-550ba57faa04042956079b8d09ec0f83bef8817f.zip | |
KVM: VMX: Drop unnecessary vmx_fb_clear_ctrl_available "cache"
Now that KVM snapshots the host's MSR_IA32_ARCH_CAPABILITIES, drop the
similar snapshot/cache of whether or not KVM is allowed to manipulate
MSR_IA32_MCU_OPT_CTRL.FB_CLEAR_DIS. The motivation for the cache was
presumably to avoid the RDMSR, e.g. boot_cpu_has_bug() is quite cheap, and
modifying the vCPU's MSR_IA32_ARCH_CAPABILITIES is an infrequent option
and a relatively slow path.
Cc: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Reviewed-by: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Link: https://lore.kernel.org/r/20230607004311.1420507-3-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'arch/x86/kvm/lapic.c')
0 files changed, 0 insertions, 0 deletions