From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: [PATCH 56/70] x86/sev-es: Handle MONITOR/MONITORX Events Date: Thu, 19 Mar 2020 10:13:53 +0100 Message-ID: <20200319091407.1481-57-joro@8bytes.org> References: <20200319091407.1481-1-joro@8bytes.org> Return-path: In-Reply-To: <20200319091407.1481-1-joro@8bytes.org> Sender: linux-kernel-owner@vger.kernel.org To: x86@kernel.org Cc: hpa@zytor.com, Andy Lutomirski , Dave Hansen , Peter Zijlstra , Thomas Hellstrom , Jiri Slaby , Dan Williams , Tom Lendacky , Juergen Gross , Kees Cook , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, virtualization@lists.linux-foundation.org, Joerg Roedel , Joerg Roedel List-Id: virtualization@lists.linuxfoundation.org From: Tom Lendacky Implement a handler for #VC exceptions caused by MONITOR and MONITORX instructions. Signed-off-by: Tom Lendacky [ jroedel@suse.de: Adapt to #VC handling infrastructure ] Co-developed-by: Joerg Roedel Signed-off-by: Joerg Roedel --- arch/x86/kernel/sev-es.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c index 11947b648b43..6bd8bc9f2e66 100644 --- a/arch/x86/kernel/sev-es.c +++ b/arch/x86/kernel/sev-es.c @@ -707,6 +707,22 @@ static enum es_result vc_handle_rdpmc(struct ghcb *ghcb, struct es_em_ctxt *ctxt return ES_OK; } +static enum es_result vc_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 = vc_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 sev_es_ghcb_hv_call(ghcb, ctxt, SVM_EXIT_MONITOR, 0, 0); +} + static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt, struct ghcb *ghcb, unsigned long exit_code, @@ -744,6 +760,9 @@ static enum es_result vc_handle_exitcode(struct es_em_ctxt *ctxt, case SVM_EXIT_WBINVD: result = vc_handle_wbinvd(ghcb, ctxt); break; + case SVM_EXIT_MONITOR: + result = vc_handle_monitor(ghcb, ctxt); + break; case SVM_EXIT_NPF: result = vc_handle_mmio(ghcb, ctxt); break; -- 2.17.1