diff options
| author | Brijesh Singh <brijesh.singh@amd.com> | 2017-07-06 09:26:45 -0400 |
|---|---|---|
| committer | Jordan Justen <jordan.l.justen@intel.com> | 2017-07-10 21:17:27 -0700 |
| commit | 24e4ad75546b3c1f334aab7057f6c10309807d8d (patch) | |
| tree | 75307e8ef3cd8bc27ec16f32d5ad7da9197b05cc /OvmfPkg/OvmfPkgX64.fdf | |
| parent | 13b5d743c87a22dfcd94e8475d943dee5712b62d (diff) | |
| download | edk2-24e4ad75546b3c1f334aab7057f6c10309807d8d.tar.gz edk2-24e4ad75546b3c1f334aab7057f6c10309807d8d.tar.bz2 edk2-24e4ad75546b3c1f334aab7057f6c10309807d8d.zip | |
OvmfPkg: Add AmdSevDxe driver
When SEV is enabled, the MMIO memory range must be mapped as unencrypted
(i.e C-bit cleared).
We need to clear the C-bit for MMIO GCD entries in order to cover the
ranges that were added during the PEI phase (through memory resource
descriptor HOBs). Additionally, the NonExistent ranges are processed
in order to cover, in advance, MMIO ranges added later in the DXE phase
by various device drivers, via the appropriate DXE memory space services.
The approach is not transparent for later addition of system memory ranges
to the GCD memory space map. (Such ranges should be encrypted.) OVMF does
not do such a thing at the moment, so this approach should be OK.
The driver is being added to the APRIORI DXE file so that, we clear the
C-bit from MMIO regions before any driver accesses it.
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Leo Duran <leo.duran@amd.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Suggested-by: Jiewen Yao <jiewen.yao@intel.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Acked-by: Jordan Justen <jordan.l.justen@intel.com>
Diffstat (limited to 'OvmfPkg/OvmfPkgX64.fdf')
| -rw-r--r-- | OvmfPkg/OvmfPkgX64.fdf | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/OvmfPkg/OvmfPkgX64.fdf b/OvmfPkg/OvmfPkgX64.fdf index 4da0b19b94..213db6bedb 100644 --- a/OvmfPkg/OvmfPkgX64.fdf +++ b/OvmfPkg/OvmfPkgX64.fdf @@ -191,6 +191,7 @@ READ_LOCK_STATUS = TRUE APRIORI DXE {
INF MdeModulePkg/Universal/DevicePathDxe/DevicePathDxe.inf
INF MdeModulePkg/Universal/PCD/Dxe/Pcd.inf
+ INF OvmfPkg/AmdSevDxe/AmdSevDxe.inf
!if $(SMM_REQUIRE) == FALSE
INF OvmfPkg/QemuFlashFvbServicesRuntimeDxe/FvbServicesRuntimeDxe.inf
!endif
@@ -352,6 +353,7 @@ INF RuleOverride=CSM OvmfPkg/Csm/Csm16/Csm16.inf INF OvmfPkg/QemuVideoDxe/QemuVideoDxe.inf
INF OvmfPkg/VirtioGpuDxe/VirtioGpu.inf
INF OvmfPkg/PlatformDxe/Platform.inf
+INF OvmfPkg/AmdSevDxe/AmdSevDxe.inf
!if $(SMM_REQUIRE) == TRUE
INF OvmfPkg/SmmAccess/SmmAccess2Dxe.inf
|