KVM: x86: Save L1 TSC offset in 'struct kvm_vcpu_arch'

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Save L1's TSC offset in 'struct kvm_vcpu_arch' and drop the kvm_x86_ops
hook read_l1_tsc_offset().  This avoids a retpoline (when configured)
when reading L1's effective TSC, which is done at least once on every
VM-Exit.

No functional change intended.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200502043234.12481-2-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Sean Christopherson 2020-05-01 21:32:25 -07:00 • committed by Paolo Bonzini

parent 1af1bb0562

commit 56ba77a459

4 changed files with 5 additions and 29 deletions

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2

arch/x86/include/asm/kvm_host.h

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11

arch/x86/kvm/svm/svm.c

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12

arch/x86/kvm/vmx/vmx.c

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9

arch/x86/kvm/x86.c

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