diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2021-06-23 15:02:23 +0300 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2021-06-23 20:55:51 +0300 |
| commit | 72a6c08c44e4460e39315ca828f60b8d5afd6b19 (patch) | |
| tree | 385a8cb9ee0dc549709a9afd559e3095cd645db1 /arch/x86/kvm/x86.c | |
| parent | 0e8c54f6b2c8b1037cef9276e451522ee90ed969 (diff) | |
| download | linux-72a6c08c44e4460e39315ca828f60b8d5afd6b19.tar.xz | |
x86/pkru: Remove xstate fiddling from write_pkru()
The PKRU value of a task is stored in task->thread.pkru when the task is
scheduled out. PKRU is restored on schedule in from there. So keeping the
XSAVE buffer up to date is a pointless exercise.
Remove the xstate fiddling and cleanup all related functions.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210623121456.897372712@linutronix.de
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 07f788872ddf..8ee7add0e763 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -943,7 +943,7 @@ void kvm_load_guest_xsave_state(struct kvm_vcpu *vcpu) (kvm_read_cr4_bits(vcpu, X86_CR4_PKE) || (vcpu->arch.xcr0 & XFEATURE_MASK_PKRU)) && vcpu->arch.pkru != vcpu->arch.host_pkru) - __write_pkru(vcpu->arch.pkru); + write_pkru(vcpu->arch.pkru); } EXPORT_SYMBOL_GPL(kvm_load_guest_xsave_state); @@ -957,7 +957,7 @@ void kvm_load_host_xsave_state(struct kvm_vcpu *vcpu) (vcpu->arch.xcr0 & XFEATURE_MASK_PKRU))) { vcpu->arch.pkru = rdpkru(); if (vcpu->arch.pkru != vcpu->arch.host_pkru) - __write_pkru(vcpu->arch.host_pkru); + write_pkru(vcpu->arch.host_pkru); } if (kvm_read_cr4_bits(vcpu, X86_CR4_OSXSAVE)) { |