mirror of https://github.com/acidanthera/audk.git
fefcf90c33
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198 Under SEV-ES, a DR7 read or write intercept generates a #VC exception. The #VC handler must provide special support to the guest for this. On a DR7 write, the #VC handler must cache the value and issue a VMGEXIT to notify the hypervisor of the write. However, the #VC handler must not actually set the value of the DR7 register. On a DR7 read, the #VC handler must return the cached value of the DR7 register to the guest. VMGEXIT is not invoked for a DR7 register read. The caching of the DR7 values will make use of the per-CPU data pages that are allocated along with the GHCB pages. The per-CPU page for a vCPU is the page that immediately follows the vCPU's GHCB page. Since each GHCB page is unique for a vCPU, the page that follows becomes unique for that vCPU. The SEC phase will reserves an area of memory for a single GHCB and per-CPU page for use by the BSP. After transitioning to the PEI phase, new GHCB and per-CPU pages are allocated for the BSP and all APs. Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Laszlo Ersek <lersek@redhat.com> Cc: Ard Biesheuvel <ard.biesheuvel@arm.com> Acked-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Regression-tested-by: Laszlo Ersek <lersek@redhat.com> |
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| .. | ||
| AcpiTimerLib | ||
| BaseMemEncryptSevLib | ||
| BasePciCapLib | ||
| BasePciCapPciSegmentLib | ||
| BhyveFwCtlLib | ||
| DxePciLibI440FxQ35 | ||
| EmuVariableFvbLib | ||
| GenericQemuLoadImageLib | ||
| LoadLinuxLib | ||
| LockBoxLib | ||
| NvVarsFileLib | ||
| PciHostBridgeLib | ||
| PlatformBmPrintScLib | ||
| PlatformBootManagerLib | ||
| PlatformBootManagerLibBhyve | ||
| PlatformDebugLibIoPort | ||
| PlatformFvbLibNull | ||
| PlatformHasIoMmuLib | ||
| PlatformSecureLib | ||
| PxeBcPcdProducerLib | ||
| QemuBootOrderLib | ||
| QemuFwCfgLib | ||
| QemuFwCfgS3Lib | ||
| QemuFwCfgSimpleParserLib | ||
| ResetSystemLib | ||
| SerializeVariablesLib | ||
| SmbiosVersionLib | ||
| SmmCpuFeaturesLib | ||
| SmmCpuPlatformHookLibQemu | ||
| Tcg2PhysicalPresenceLibNull | ||
| Tcg2PhysicalPresenceLibQemu | ||
| TlsAuthConfigLib | ||
| UefiPciCapPciIoLib | ||
| VirtioLib | ||
| VirtioMmioDeviceLib | ||
| VmgExitLib | ||
| X86QemuLoadImageLib | ||
| XenConsoleSerialPortLib | ||
| XenHypercallLib | ||
| XenIoMmioLib | ||
| XenPlatformLib | ||
| XenRealTimeClockLib | ||