KVM: x86: Mark GPRs dirty when written
When performing VMGEXIT processing for an SEV-ES guest, register values will be synced between KVM and the GHCB. Prepare for detecting when a GPR has been updated (marked dirty) in order to determine whether to sync the register to the GHCB. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Message-Id: <7ca2a1cdb61456f2fe9c64193e34d601e395c133.1607620209.git.thomas.lendacky@amd.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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