On 9/22/22 15:50, Dionna Glaze wrote:
These three patches build on the lazy-accept patch series
"Introduce Lazy-accept for Tdx guest"
by adding SEV-SNP support for the MemoryAccept protocol, and
importantly making eager memory acceptance the default behavior.
For unaccepted memory to be enabled, we must know that the booted image
supports the unaccepted memory type. We add a trivial protocol that sets
a dynamic Pcd to true when called in order for the booted image to
signal its support for unaccepted memory. This does not need to be an
OsIndications bit because it does not need to be persisted.
We use the Pcd to disable a new ExitBootServices notification that
accepts all unaccepted memory, removes the unaccepted memory entries in
the memory space map, and then add the same memory ranges back as
conventional memory.
All images that support unaccepted memory must now locate and call this
new ENABLE_UNACCEPTED_MEMORY_PROTOCOL.
This seems to be missing the creation of unaccepted memory under SEV-SNP.
Is that going to be part of a separate patch (to update
PlatformAddMemoryBaseSizeHob () and mark anything above 4GB as unaccepted)?
Thanks,
Tom
Cc: Ard Biescheuvel <a...@kernel.org>
Cc: "Min M. Xu" <min.m...@intel.org>
Cc: Gerd Hoffmann <kra...@redhat.com>
Cc: James Bottomley <j...@linux.ibm.com>
Cc: Tom Lendacky <thomas.lenda...@amd.com>
Cc: Jiewen Yao <jiewen....@intel.com>
Cc: Erdem Aktas <erdemak...@google.com>
Signed-off-by: Dionna Glaze <dionnagl...@google.com>
Dionna Glaze (3):
OvmfPkg: Realize EfiMemoryAcceptProtocol in AmdSevDxe
DxeMain accepts all memory at EBS if needed
MdeModulePkg: add EnableUnacceptedMemoryProtocol
MdeModulePkg/Core/Dxe/DxeMain.h | 32 +++++
MdeModulePkg/Core/Dxe/DxeMain.inf | 3 +
MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c | 19 ++-
MdeModulePkg/Core/Dxe/Mem/Page.c | 122 ++++++++++++++++++
MdeModulePkg/MdeModulePkg.dec | 9 ++
MdeModulePkg/MdeModulePkg.uni | 6 +
OvmfPkg/AmdSev/AmdSevX64.dsc | 1 +
OvmfPkg/AmdSevDxe/AmdSevDxe.c | 27 ++++
OvmfPkg/AmdSevDxe/AmdSevDxe.inf | 3 +
OvmfPkg/Bhyve/BhyveX64.dsc | 2 +
OvmfPkg/CloudHv/CloudHvX64.dsc | 2 +
OvmfPkg/Include/Library/MemEncryptSevLib.h | 14 ++
OvmfPkg/IntelTdx/IntelTdxX64.dsc | 2 +
.../Ia32/MemEncryptSevLib.c | 17 +++
.../X64/DxeSnpSystemRamValidate.c | 35 +++++
.../X64/PeiSnpSystemRamValidate.c | 17 +++
.../X64/SecSnpSystemRamValidate.c | 18 +++
OvmfPkg/OvmfPkgIa32X64.dsc | 2 +
OvmfPkg/OvmfPkgX64.dsc | 2 +
OvmfPkg/OvmfXen.dsc | 2 +
20 files changed, 334 insertions(+), 1 deletion(-)
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