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KVM: VMX: Add a helper to test for a valid error code given an intr info

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Add a helper, is_exception_with_error_code(), to provide the simple but
difficult to read code of checking for a valid exception with an error
code given a vmcs.VM_EXIT_INTR_INFO value.  The helper will gain another
user, vmx_get_exit_info(), in a future patch.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200923201349.16097-4-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2020-09-23 13:13:45 -07:00 committed by Paolo Bonzini
parent a9d7d76c66
commit f315f2b140
2 changed files with 8 additions and 3 deletions
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4
arch/x86/kvm/vmx/nested.c
View File

@ -5956,9 +5956,7 @@ bool nested_vmx_reflect_vmexit(struct kvm_vcpu *vcpu)
* need to be synthesized by querying the in-kernel LAPIC, but external
* interrupts are never reflected to L1 so it's a non-issue.
*/
if ((exit_intr_info &
(INTR_INFO_VALID_MASK | INTR_INFO_DELIVER_CODE_MASK)) ==
(INTR_INFO_VALID_MASK | INTR_INFO_DELIVER_CODE_MASK)) {
if (is_exception_with_error_code(exit_intr_info)) {
struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
vmcs12->vm_exit_intr_error_code =

7
arch/x86/kvm/vmx/vmcs.h
View File

@ -138,6 +138,13 @@ static inline bool is_external_intr(u32 intr_info)
return is_intr_type(intr_info, INTR_TYPE_EXT_INTR);
}
static inline bool is_exception_with_error_code(u32 intr_info)
{
const u32 mask = INTR_INFO_VALID_MASK | INTR_INFO_DELIVER_CODE_MASK;
return (intr_info & mask) == mask;
}
enum vmcs_field_width {
VMCS_FIELD_WIDTH_U16 = 0,
VMCS_FIELD_WIDTH_U64 = 1,