KVM: VMX: Add error handling to VMREAD helper

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Now that VMREAD flows require a taken branch, courtesy of commit

  3901336ed9 ("x86/kvm: Don't call kvm_spurious_fault() from .fixup")

bite the bullet and add full error handling to VMREAD, i.e. replace the
JMP added by __ex()/____kvm_handle_fault_on_reboot() with a hinted Jcc.

To minimize the code footprint, add a helper function, vmread_error(),
to handle both faults and failures so that the inline flow has a single
CALL.

Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

...

This commit is contained in:

Sean Christopherson 2019-07-19 13:41:08 -07:00 • committed by Paolo Bonzini

parent 52a9fcbc73

commit 6e2020977e

2 changed files with 25 additions and 4 deletions

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21

arch/x86/kvm/vmx/ops.h

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8

arch/x86/kvm/vmx/vmx.c

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