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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2021-01-07 12:48:22 -0600 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2021-01-07 19:34:39 +0000 |
| commit | c330af0246ac9b1c37d17fc79881fc2dd96ec80c (patch) | |
| tree | e6d9a9e878aa025b67391d261cdc0855a36e67b4 /OvmfPkg/Library/BaseMemEncryptSevLib/Ia32 | |
| parent | a746ca5b47fdffd9c675f2cbf321a1c36ccc9356 (diff) | |
| download | edk2-c330af0246ac9b1c37d17fc79881fc2dd96ec80c.tar.gz edk2-c330af0246ac9b1c37d17fc79881fc2dd96ec80c.tar.bz2 edk2-c330af0246ac9b1c37d17fc79881fc2dd96ec80c.zip | |
OvmfPkg/MemEncryptSevLib: Address range encryption state interface
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3108
Update the MemEncryptSevLib library to include an interface that can
report the encryption state on a range of memory. The values will
represent the range as being unencrypted, encrypted, a mix of unencrypted
and encrypted, and error (e.g. ranges that aren't mapped).
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Message-Id: <0d98f4d42a2b67310c29bac7bcdcf1eda6835847.1610045305.git.thomas.lendacky@amd.com>
Diffstat (limited to 'OvmfPkg/Library/BaseMemEncryptSevLib/Ia32')
| -rw-r--r-- | OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c b/OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c index b4f6e5738e..12a5bf495b 100644 --- a/OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c +++ b/OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c @@ -2,7 +2,7 @@ Secure Encrypted Virtualization (SEV) library helper function
- Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>
+ Copyright (c) 2017 - 2020, AMD Incorporated. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
@@ -82,3 +82,32 @@ MemEncryptSevSetPageEncMask ( //
return RETURN_UNSUPPORTED;
}
+
+/**
+ Returns the encryption state of the specified virtual address range.
+
+ @param[in] Cr3BaseAddress Cr3 Base Address (if zero then use
+ current CR3)
+ @param[in] BaseAddress Base address to check
+ @param[in] Length Length of virtual address range
+
+ @retval MemEncryptSevAddressRangeUnencrypted Address range is mapped
+ unencrypted
+ @retval MemEncryptSevAddressRangeEncrypted Address range is mapped
+ encrypted
+ @retval MemEncryptSevAddressRangeMixed Address range is mapped mixed
+ @retval MemEncryptSevAddressRangeError Address range is not mapped
+**/
+MEM_ENCRYPT_SEV_ADDRESS_RANGE_STATE
+EFIAPI
+MemEncryptSevGetAddressRangeState (
+ IN PHYSICAL_ADDRESS Cr3BaseAddress,
+ IN PHYSICAL_ADDRESS BaseAddress,
+ IN UINTN Length
+ )
+{
+ //
+ // Memory is always encrypted in 32-bit mode
+ //
+ return MemEncryptSevAddressRangeEncrypted;
+}
|