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Date: Tue, 11 Feb 2020 14:52:42 +0100 From: Joerg Roedel <joro@...tes.org> To: x86@...nel.org Cc: hpa@...or.com, Andy Lutomirski <luto@...nel.org>, Dave Hansen <dave.hansen@...ux.intel.com>, Peter Zijlstra <peterz@...radead.org>, Thomas Hellstrom <thellstrom@...are.com>, Jiri Slaby <jslaby@...e.cz>, Dan Williams <dan.j.williams@...el.com>, Tom Lendacky <thomas.lendacky@....com>, Juergen Gross <jgross@...e.com>, Kees Cook <keescook@...omium.org>, linux-kernel@...r.kernel.org, kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org, Joerg Roedel <joro@...tes.org>, Joerg Roedel <jroedel@...e.de> Subject: [PATCH 48/62] x86/sev-es: Handle MONITOR/MONITORX Events From: Tom Lendacky <thomas.lendacky@....com> Implement a handler for #VC exceptions caused by MONITOR and MONITORX instructions. Signed-off-by: Tom Lendacky <thomas.lendacky@....com> [ jroedel@...e.de: Adapt to #VC handling infrastructure ] Co-developed-by: Joerg Roedel <jroedel@...e.de> Signed-off-by: Joerg Roedel <jroedel@...e.de> --- 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
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