KVM: x86: Read guest RIP from within the kvm_nested_vmexit tracepoint

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Use kvm_rip_read() to read the guest's RIP for the nested VM-Exit
tracepoint instead of having the caller pass in an argument.  Params
that are passed into a tracepoint are evaluated even if the tracepoint
is disabled, i.e. passing in RIP for VMX incurs a VMREAD and retpoline
to retrieve a value that may never be used, e.g. if the exit is due to a
hardware interrupt.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200923201349.16097-3-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Sean Christopherson 2020-09-23 13:13:44 -07:00 • committed by Paolo Bonzini

parent b2d522552c

commit a9d7d76c66

3 changed files with 5 additions and 5 deletions

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2

arch/x86/kvm/svm/svm.c

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6

arch/x86/kvm/trace.h

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2

arch/x86/kvm/vmx/nested.c

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