On 04/27/21 18:21, Lendacky, Thomas wrote:
> From: Tom Lendacky <thomas.lenda...@amd.com>
>
> Define a new PPI GUID that is to be used as a signal of when it is safe
> to access the TPM MMIO range. This is needed so that, when SEV is active,
> the MMIO range can be mapped unencrypted before it is accessed.
>
> Cc: Laszlo Ersek <ler...@redhat.com>
> Cc: Ard Biesheuvel <ardb+tianoc...@kernel.org>
> Cc: Jordan Justen <jordan.l.jus...@intel.com>
> Cc: Brijesh Singh <brijesh.si...@amd.com>
> Cc: Erdem Aktas <erdemak...@google.com>
> Cc: James Bottomley <j...@linux.ibm.com>
> Cc: Jiewen Yao <jiewen....@intel.com>
> Cc: Min Xu <min.m...@intel.com>
> Cc: Marc-Andr?? Lureau <marcandre.lur...@redhat.com>
> Cc: Stefan Berger <stef...@linux.ibm.com>
> Signed-off-by: Tom Lendacky <thomas.lenda...@amd.com>
> ---
> OvmfPkg/OvmfPkg.dec | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/OvmfPkg/OvmfPkg.dec b/OvmfPkg/OvmfPkg.dec
> index 9629707020ba..6ae733f6e39f 100644
> --- a/OvmfPkg/OvmfPkg.dec
> +++ b/OvmfPkg/OvmfPkg.dec
> @@ -128,6 +128,10 @@ [Ppis]
> # has been discovered and recorded
> gOvmfTpmDiscoveredPpiGuid = {0xb9a61ad0, 0x2802, 0x41f3,
> {0xb5, 0x13, 0x96, 0x51, 0xce, 0x6b, 0xd5, 0x75}}
>
> + # This PPI signals that accessing the MMIO range of the TPM is possible in
> + # the PEI phase, regardless of memory encryption
> + gOvmfTpmMmioAccessiblePpiGuid = {0x35c84ff2, 0x7bfe, 0x453d,
> {0x84, 0x5f, 0x68, 0x3a, 0x49, 0x2c, 0xf7, 0xb7}}
> +
> [Protocols]
> gVirtioDeviceProtocolGuid = {0xfa920010, 0x6785, 0x4941,
> {0xb6, 0xec, 0x49, 0x8c, 0x57, 0x9f, 0x16, 0x0a}}
> gXenBusProtocolGuid = {0x3d3ca290, 0xb9a5, 0x11e3,
> {0xb7, 0x5d, 0xb8, 0xac, 0x6f, 0x7d, 0x65, 0xe6}}
>
Reviewed-by: Laszlo Ersek <ler...@redhat.com>
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