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From: "Lendacky, Thomas" <thomas.lendacky@amd.com>
To: "devel@edk2.groups.io" <devel@edk2.groups.io>
Cc: Jordan Justen <jordan.l.justen@intel.com>,
	Laszlo Ersek <lersek@redhat.com>,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Michael D Kinney <michael.d.kinney@intel.com>,
	Liming Gao <liming.gao@intel.com>,
	Eric Dong <eric.dong@intel.com>, Ray Ni <ray.ni@intel.com>,
	"Singh, Brijesh" <brijesh.singh@amd.com>
Subject: [RFC PATCH 23/28] UefiCpuPkg/CpuExceptionHandler: Add support for MWAIT/MWAITX NAE events
Date: Mon, 19 Aug 2019 21:36:17 +0000	[thread overview]
Message-ID: <5b34d3a3c9c83d44818893f6ace5716b4c202f4d.1566250534.git.thomas.lendacky@amd.com> (raw)
In-Reply-To: <cover.1566250534.git.thomas.lendacky@amd.com>

From: Tom Lendacky <thomas.lendacky@amd.com>

Under SEV-ES, a MWAIT/MWAITX intercept generates a #VC exception.
VMGEXIT must be used to allow the hypervisor to handle this intercept.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
---
 .../X64/AMDSevVcCommon.c                      | 29 +++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/AMDSevVcCommon.c b/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/AMDSevVcCommon.c
index 154ca091936d..43a3a116af5d 100644
--- a/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/AMDSevVcCommon.c
+++ b/UefiCpuPkg/Library/CpuExceptionHandlerLib/X64/AMDSevVcCommon.c
@@ -528,6 +528,31 @@ UnsupportedExit (
   return Status;
 }
 
+STATIC
+UINTN
+MwaitExit (
+  GHCB                     *Ghcb,
+  EFI_SYSTEM_CONTEXT_X64   *Regs,
+  SEV_ES_INSTRUCTION_DATA  *InstructionData
+  )
+{
+  UINTN   Status;
+
+  DecodeModRm (Regs, InstructionData);
+
+  Ghcb->SaveArea.Rax = Regs->Rax;
+  GhcbSetRegValid (Ghcb, GhcbRax);
+  Ghcb->SaveArea.Rcx = Regs->Rcx;
+  GhcbSetRegValid (Ghcb, GhcbRcx);
+
+  Status = VmgExit (Ghcb, SvmExitMwait, 0, 0);
+  if (Status) {
+    return Status;
+  }
+
+  return 0;
+}
+
 STATIC
 UINTN
 MonitorExit (
@@ -1074,6 +1099,10 @@ DoVcCommon (
     NaeExit = MonitorExit;
     break;
 
+  case SvmExitMwait:
+    NaeExit = MwaitExit;
+    break;
+
   case SvmExitNpf:
     NaeExit = MmioExit;
     break;
-- 
2.17.1


  parent reply	other threads:[~2019-08-19 21:36 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-19 21:35 [RFC PATCH 00/28] SEV-ES guest support thomas.lendacky
2019-08-19 21:35 ` [RFC PATCH 01/28] OvmfPkg/Sec: Enable cache early to speed up booting Lendacky, Thomas
2019-08-21 14:21   ` [edk2-devel] " Laszlo Ersek
2019-08-21 21:25     ` Lendacky, Thomas
2019-08-21 21:51     ` Jordan Justen
2019-08-22 13:46       ` Laszlo Ersek
2019-08-22 20:44         ` Jordan Justen
2019-08-23 13:32           ` Laszlo Ersek
2019-08-19 21:35 ` [RFC PATCH 02/28] OvmfPkg/ResetVector: Add support for a 32-bit SEV check Lendacky, Thomas
2019-08-19 21:35 ` [RFC PATCH 03/28] OvmfPkg/MemEncryptSevLib: Add an SEV-ES guest indicator function Lendacky, Thomas
2019-08-19 21:35 ` [RFC PATCH 04/28] OvmfPkg: Create a GHCB page for use during Sec phase Lendacky, Thomas
2019-08-21 14:25   ` [edk2-devel] " Laszlo Ersek
2019-08-21 21:29     ` Lendacky, Thomas
2019-08-19 21:35 ` [RFC PATCH 05/28] OvmfPkg: Create GHCB pages for use during Pei and Dxe phase Lendacky, Thomas
2019-08-21 14:31   ` [edk2-devel] " Laszlo Ersek
2019-08-21 21:42     ` Lendacky, Thomas
2019-08-22 14:12       ` Laszlo Ersek
2019-08-22 15:24         ` Lendacky, Thomas
2019-08-23 13:26           ` Laszlo Ersek
2019-08-19 21:35 ` [RFC PATCH 06/28] OvmfPkg: A per-CPU variable area for #VC usage Lendacky, Thomas
2019-08-19 21:35 ` [RFC PATCH 07/28] OvmfPkg/PlatformPei: Move early GDT into ram when SEV-ES is enabled Lendacky, Thomas
2019-08-21 15:44   ` [edk2-devel] " Laszlo Ersek
2019-08-19 21:35 ` [RFC PATCH 08/28] MdePkg/BaseLib: Implement the VMGEXIT support Lendacky, Thomas
2019-08-19 21:47   ` Ni, Ray
2019-08-19 22:25     ` Lendacky, Thomas
2019-08-19 21:35 ` [RFC PATCH 09/28] UefiCpuPkg/CpuExceptionHandler: Add base support for the #VC exception Lendacky, Thomas
2019-08-19 21:35 ` [RFC PATCH 10/28] UefiCpuPkg/CpuExceptionHandler: Add base #VC exception handling support for Sec phase Lendacky, Thomas
2019-08-19 21:36 ` [RFC PATCH 11/28] UefiCpuPkg/CpuExceptionHandler: Add support for IOIO_PROT NAE events Lendacky, Thomas
2019-08-19 21:36 ` [RFC PATCH 12/28] UefiCpuPkg/CpuExceptionHandler: Support string IO " Lendacky, Thomas
2019-08-19 21:36 ` [RFC PATCH 13/28] UefiCpuPkg/CpuExceptionHandler: Add support for CPUID " Lendacky, Thomas
2019-08-19 21:36 ` [RFC PATCH 14/28] UefiCpuPkg/CpuExceptionHandler: Add support for MSR_PROT " Lendacky, Thomas
2019-08-19 21:36 ` [RFC PATCH 15/28] UefiCpuPkg/CpuExceptionHandler: Add support for NPF NAE events (MMIO) Lendacky, Thomas
2019-08-19 21:36 ` [RFC PATCH 16/28] UefiCpuPkg/CpuExceptionHandler: Add support for WBINVD NAE events Lendacky, Thomas
2019-08-19 21:36 ` [RFC PATCH 17/28] UefiCpuPkg/CpuExceptionHandler: Add support for RDTSC " Lendacky, Thomas
2019-08-19 21:36 ` [RFC PATCH 18/28] UefiCpuPkg/CpuExceptionHandler: Add support for RDPMC " Lendacky, Thomas
2019-08-19 21:36 ` [RFC PATCH 19/28] UefiCpuPkg/CpuExceptionHandler: Add support for INVD " Lendacky, Thomas
2019-08-19 21:36 ` [RFC PATCH 20/28] UefiCpuPkg/CpuExceptionHandler: Add support for VMMCALL " Lendacky, Thomas
2019-08-19 21:36 ` [RFC PATCH 21/28] UefiCpuPkg/CpuExceptionHandler: Add support for RDTSCP " Lendacky, Thomas
2019-08-19 21:36 ` [RFC PATCH 22/28] UefiCpuPkg/CpuExceptionHandler: Add support for MONITOR/MONITORX " Lendacky, Thomas
2019-08-19 21:36 ` Lendacky, Thomas [this message]
2019-08-19 21:36 ` [RFC PATCH 24/28] UefiCpuPkg/CpuExceptionHandler: Add support for DR7 Read/Write " Lendacky, Thomas
2019-08-19 21:36 ` [RFC PATCH 25/28] UefiCpuPkg/CpuExceptionHandler: Add base #VC exception handling support for Pei/Dxe phases Lendacky, Thomas
2019-08-19 21:36 ` [RFC PATCH 26/28] UefiCpuPkg/MpInitLib: Update CPU MP data with a flag to indicate if SEV-ES is active Lendacky, Thomas
2019-08-19 21:36 ` [RFC PATCH 27/28] UefiCpuPkg/MpInitLib: Allow AP booting under SEV-ES Lendacky, Thomas
2019-08-19 21:36 ` [RFC PATCH 28/28] UefiCpuPkg/MpInitLib: Introduce an MP finalization routine to support SEV-ES Lendacky, Thomas
2019-08-21 14:17 ` [edk2-devel] [RFC PATCH 00/28] SEV-ES guest support Laszlo Ersek

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