From: Joerg Roedel <jroedel@xxxxxxx> Implement a handler for #VC exceptions caused by #AC exceptions. The #AC exception is just forwarded to do_alignment_check() and not pushed down to the hypervisor, as requested by the SEV-ES GHCB Standardization Specification. Signed-off-by: Joerg Roedel <jroedel@xxxxxxx> --- arch/x86/kernel/sev-es.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c index 6bd2cae7eb9c..1b873d00e38f 100644 --- a/arch/x86/kernel/sev-es.c +++ b/arch/x86/kernel/sev-es.c @@ -375,6 +375,10 @@ static enum es_result handle_vc_exception(struct es_em_ctxt *ctxt, case SVM_EXIT_WRITE_DR7: result = handle_dr7_write(ghcb, ctxt, early); break; + case SVM_EXIT_EXCP_BASE + X86_TRAP_AC: + do_alignment_check(ctxt->regs, 0); + result = ES_RETRY; + break; case SVM_EXIT_RDTSC: case SVM_EXIT_RDTSCP: result = handle_rdtsc(ghcb, ctxt, exit_code); -- 2.17.1
