From: Tom Lendacky <[email protected]> Implement a handler for #VC exceptions caused by MWAIT and MWAITX instructions.
Signed-off-by: Tom Lendacky <[email protected]> [ [email protected]: Adapt to #VC handling infrastructure ] Co-developed-by: Joerg Roedel <[email protected]> Signed-off-by: Joerg Roedel <[email protected]> --- arch/x86/kernel/sev-es.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c index 865f510d11ba..8f1e84da6fa6 100644 --- a/arch/x86/kernel/sev-es.c +++ b/arch/x86/kernel/sev-es.c @@ -333,6 +333,14 @@ static enum es_result handle_monitor(struct ghcb *ghcb, struct es_em_ctxt *ctxt) return ghcb_hv_call(ghcb, ctxt, SVM_EXIT_MONITOR, 0, 0); } +static enum es_result handle_mwait(struct ghcb *ghcb, struct es_em_ctxt *ctxt) +{ + ghcb_set_rax(ghcb, ctxt->regs->ax); + ghcb_set_rcx(ghcb, ctxt->regs->cx); + + return ghcb_hv_call(ghcb, ctxt, SVM_EXIT_MWAIT, 0, 0); +} + static enum es_result handle_vc_exception(struct es_em_ctxt *ctxt, struct ghcb *ghcb, unsigned long exit_code, @@ -372,6 +380,9 @@ static enum es_result handle_vc_exception(struct es_em_ctxt *ctxt, case SVM_EXIT_MONITOR: result = handle_monitor(ghcb, ctxt); break; + case SVM_EXIT_MWAIT: + result = handle_mwait(ghcb, ctxt); + break; case SVM_EXIT_NPF: result = handle_mmio(ghcb, ctxt); break; -- 2.17.1 _______________________________________________ Virtualization mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/virtualization
