[edk2-devel] [PATCH V5 08/10] OvmfPkg/IncompatiblePciDeviceSupportDxe: Ignore OptionRom in Td guest

[Gerd Hoffmann]

On Sun, Mar 13, 2022 at 08:41:09AM +0800, Min Xu wrote:
> RFC: https://bugzilla.tianocore.org/show_bug.cgi?id=3429
> 
> Host VMM may inject OptionRom which is untrusted in Td guest. So PCI
> OptionRom needs to be ignored if it is Td guest. According to
> "Table 20. ACPI 2.0 & 3.0 QWORD Address Space Descriptor Usage"
> PI spec 1.7, type-specific flags can be set to 0 when Address
> Translation Offset == 6 to skip device option ROM.
> 
> Cc: Michael D Kinney <michael.d.kinney at intel.com>
> Cc: Brijesh Singh <brijesh.singh at amd.com>
> Cc: Erdem Aktas <erdemaktas at google.com>
> Cc: James Bottomley <jejb at linux.ibm.com>
> Cc: Jiewen Yao <jiewen.yao at intel.com>
> Cc: Tom Lendacky <thomas.lendacky at amd.com>
> Cc: Gerd Hoffmann <kraxel at redhat.com>
> Signed-off-by: Min Xu <min.m.xu at intel.com>

Acked-by: Gerd Hoffmann <kraxel at redhat.com>



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