From: Tom Lendacky <[email protected]> Implement a handler for #VC exceptions caused by MONITOR and MONITORX 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 | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c index d5a14f277adb..865f510d11ba 100644 --- a/arch/x86/kernel/sev-es.c +++ b/arch/x86/kernel/sev-es.c @@ -318,6 +318,21 @@ static enum es_result handle_invd(struct ghcb *ghcb, struct es_em_ctxt *ctxt) return ghcb_hv_call(ghcb, ctxt, SVM_EXIT_INVD, 0, 0); } +static enum es_result handle_monitor(struct ghcb *ghcb, struct es_em_ctxt *ctxt) +{ + phys_addr_t monitor_pa; + pgd_t *pgd; + + pgd = __va(read_cr3_pa()); + monitor_pa = es_slow_virt_to_phys(ghcb, ctxt->regs->ax); + + ghcb_set_rax(ghcb, monitor_pa); + ghcb_set_rcx(ghcb, ctxt->regs->cx); + ghcb_set_rdx(ghcb, ctxt->regs->dx); + + return ghcb_hv_call(ghcb, ctxt, SVM_EXIT_MONITOR, 0, 0); +} + static enum es_result handle_vc_exception(struct es_em_ctxt *ctxt, struct ghcb *ghcb, unsigned long exit_code, @@ -354,6 +369,9 @@ static enum es_result handle_vc_exception(struct es_em_ctxt *ctxt, case SVM_EXIT_WBINVD: result = handle_wbinvd(ghcb, ctxt); break; + case SVM_EXIT_MONITOR: + result = handle_monitor(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
