diff options
author | Brijesh Singh via groups.io <brijesh.singh=amd.com@groups.io> | 2021-12-09 11:27:43 +0800 |
---|---|---|
committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2021-12-09 06:28:10 +0000 |
commit | d706f8fec256585de76280d2a1e1aa9550cefe12 (patch) | |
tree | 0c545b9df216c94d3981472e2ac2002e53ae8739 /OvmfPkg/Library/BaseMemEncryptSevLib/X64/SnpPageStateChangeInternal.c | |
parent | ade62c18f4742301bbef474ac10518bde5972fba (diff) | |
download | edk2-d706f8fec256585de76280d2a1e1aa9550cefe12.tar.gz edk2-d706f8fec256585de76280d2a1e1aa9550cefe12.tar.bz2 edk2-d706f8fec256585de76280d2a1e1aa9550cefe12.zip |
OvmfPkg/MemEncryptSevLib: add function to check the VMPL0
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3275
Virtual Machine Privilege Level (VMPL) feature in the SEV-SNP
architecture allows a guest VM to divide its address space into four
levels. The level can be used to provide the hardware isolated
abstraction layers with a VM. The VMPL0 is the highest privilege, and
VMPL3 is the least privilege. Certain operations must be done by the
VMPL0 software, such as:
* Validate or invalidate memory range (PVALIDATE instruction)
* Allocate VMSA page (RMPADJUST instruction when VMSA=1)
The initial SEV-SNP support assumes that the guest is running on VMPL0.
Let's add function in the MemEncryptSevLib that can be used for checking
whether guest is booted under the VMPL0.
Cc: Michael Roth <michael.roth@amd.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Min Xu <min.m.xu@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Erdem Aktas <erdemaktas@google.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Diffstat (limited to 'OvmfPkg/Library/BaseMemEncryptSevLib/X64/SnpPageStateChangeInternal.c')
-rw-r--r-- | OvmfPkg/Library/BaseMemEncryptSevLib/X64/SnpPageStateChangeInternal.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SnpPageStateChangeInternal.c b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SnpPageStateChangeInternal.c index 9c552ef5c7..d11aafae84 100644 --- a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SnpPageStateChangeInternal.c +++ b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SnpPageStateChangeInternal.c @@ -42,7 +42,6 @@ MemoryStateToGhcbOp ( return Cmd;
}
-STATIC
VOID
SnpPageStateFailureTerminate (
VOID
|