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| author | Brijesh Singh <brijesh.singh@amd.com> | 2017-10-05 15:16:42 -0500 |
|---|---|---|
| committer | Laszlo Ersek <lersek@redhat.com> | 2017-10-17 21:28:27 +0200 |
| commit | 6041ac65ae879389f3ab5c0699f916d3e71c97fe (patch) | |
| tree | 7fc1093afd722d3c8c2eb47c30d382746c2cabce /OvmfPkg/OvmfPkgX64.dsc | |
| parent | 071f1d19ddbc4abaaccbddfc7d6fcc5677f9b5c3 (diff) | |
| download | edk2-6041ac65ae879389f3ab5c0699f916d3e71c97fe.tar.gz edk2-6041ac65ae879389f3ab5c0699f916d3e71c97fe.tar.bz2 edk2-6041ac65ae879389f3ab5c0699f916d3e71c97fe.zip | |
OvmfPkg/PlatformPei: DENY_EXECUTE_ON_SECURITY_VIOLATION when SEV is active
The following commit:
1fea9ddb4e3f OvmfPkg: execute option ROM images regardless of Secure Boot
sets the OptionRomImageVerificationPolicy to ALWAYS_EXECUTE the expansion
ROMs attached to the emulated PCI devices. A expansion ROM constitute
another channel through which a cloud provider (i.e hypervisor) can
inject a code in guest boot flow to compromise it.
When SEV is enabled, the bios code has been verified by the guest owner
via the SEV guest launch sequence before its executed. When secure boot,
is enabled, lets make sure that we do not allow guest bios to execute a
code which is not signed by the guest owner.
Fixes: https://bugzilla.tianocore.org/show_bug.cgi?id=728
Cc: Chao Zhang <chao.b.zhang@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Diffstat (limited to 'OvmfPkg/OvmfPkgX64.dsc')
| -rw-r--r-- | OvmfPkg/OvmfPkgX64.dsc | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc index 36c60fc19c..e52a3bd4db 100644 --- a/OvmfPkg/OvmfPkgX64.dsc +++ b/OvmfPkg/OvmfPkgX64.dsc @@ -488,10 +488,6 @@ gUefiCpuPkgTokenSpaceGuid.PcdCpuSmmStackSize|0x4000
!endif
-!if $(SECURE_BOOT_ENABLE) == TRUE
- gEfiSecurityPkgTokenSpaceGuid.PcdOptionRomImageVerificationPolicy|0x00
-!endif
-
# IRQs 5, 9, 10, 11 are level-triggered
gPcAtChipsetPkgTokenSpaceGuid.Pcd8259LegacyModeEdgeLevel|0x0E20
@@ -551,6 +547,11 @@ gUefiCpuPkgTokenSpaceGuid.PcdCpuSmmApSyncTimeout|100000
!endif
+!if $(SECURE_BOOT_ENABLE) == TRUE
+ gEfiSecurityPkgTokenSpaceGuid.PcdOptionRomImageVerificationPolicy|0x00
+!endif
+
+
################################################################################
#
# Components Section - list of all EDK II Modules needed by this Platform.
|