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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2024-03-08 07:31:32 -0800 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2024-04-17 18:30:03 +0000 |
| commit | 30d274e354d47c3ad78121f31407aeacbccf9bec (patch) | |
| tree | ec9d175fb0e0f8285acc5718a59a41167e5d9610 /UefiCpuPkg/Library/AmdSvsmLibNull/AmdSvsmLibNull.c | |
| parent | c0bf953fe889f5a47fb830cec53a57bfa2380b4d (diff) | |
| download | edk2-30d274e354d47c3ad78121f31407aeacbccf9bec.tar.gz edk2-30d274e354d47c3ad78121f31407aeacbccf9bec.tar.bz2 edk2-30d274e354d47c3ad78121f31407aeacbccf9bec.zip | |
UefiCpuPkg/AmdSvsmLib: Create the AmdSvsmLib library to support an SVSM
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=4654
In order to support an SEV-SNP guest running under an SVSM at VMPL1 or
lower, a new library must be created.
This library includes an interface to detect if running under an SVSM, an
interface to return the current VMPL, an interface to perform memory
validation and an interface to set or clear the attribute that allows a
page to be used as a VMSA.
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Acked-by: Ray Ni <ray.ni@intel.com>
Diffstat (limited to 'UefiCpuPkg/Library/AmdSvsmLibNull/AmdSvsmLibNull.c')
| -rw-r--r-- | UefiCpuPkg/Library/AmdSvsmLibNull/AmdSvsmLibNull.c | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/UefiCpuPkg/Library/AmdSvsmLibNull/AmdSvsmLibNull.c b/UefiCpuPkg/Library/AmdSvsmLibNull/AmdSvsmLibNull.c new file mode 100644 index 0000000000..a83fcbd6ce --- /dev/null +++ b/UefiCpuPkg/Library/AmdSvsmLibNull/AmdSvsmLibNull.c @@ -0,0 +1,108 @@ +/** @file
+ AmdSvsm Base Support Library.
+
+ Copyright (C) 2024, Advanced Micro Devices, Inc. All rights reserved.<BR>
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+#include <Base.h>
+#include <Uefi.h>
+#include <Library/AmdSvsmLib.h>
+
+/**
+ Report the presence of an Secure Virtual Services Module (SVSM).
+
+ Determines the presence of an SVSM.
+
+ @retval TRUE An SVSM is present
+ @retval FALSE An SVSM is not present
+
+**/
+BOOLEAN
+EFIAPI
+AmdSvsmIsSvsmPresent (
+ VOID
+ )
+{
+ return FALSE;
+}
+
+/**
+ Report the VMPL level at which the SEV-SNP guest is running.
+
+ Determines the VMPL level at which the guest is running. If an SVSM is
+ not present, then it must be VMPL0, otherwise return what is reported
+ by the SVSM.
+
+ @return The VMPL level
+
+**/
+UINT8
+EFIAPI
+AmdSvsmSnpGetVmpl (
+ VOID
+ )
+{
+ return 0;
+}
+
+/**
+ Report the Calling Area address (CAA) for the BSP of the SEV-SNP guest.
+
+ If an SVSM is present, the CAA for the BSP is returned.
+
+ @return The CAA
+
+**/
+UINT64
+EFIAPI
+AmdSvsmSnpGetCaa (
+ VOID
+ )
+{
+ return 0;
+}
+
+/**
+ Perform a PVALIDATE operation for the page ranges specified.
+
+ Validate or rescind the validation of the specified pages.
+
+ @param[in] Info Pointer to a page state change structure
+
+**/
+VOID
+EFIAPI
+AmdSvsmSnpPvalidate (
+ IN SNP_PAGE_STATE_CHANGE_INFO *Info
+ )
+{
+}
+
+/**
+ Perform an RMPADJUST operation to alter the VMSA setting of a page.
+
+ Add or remove the VMSA attribute for a page.
+
+ @param[in] Vmsa Pointer to an SEV-ES save area page
+ @param[in] ApicId APIC ID associated with the VMSA
+ @param[in] SetVmsa Boolean indicator as to whether to set or
+ or clear the VMSA setting for the page
+
+ @retval EFI_SUCCESS RMPADJUST operation successful
+ @retval EFI_UNSUPPORTED Operation is not supported
+ @retval EFI_INVALID_PARAMETER RMPADJUST operation failed, an invalid
+ parameter was supplied
+
+**/
+EFI_STATUS
+EFIAPI
+AmdSvsmSnpVmsaRmpAdjust (
+ IN SEV_ES_SAVE_AREA *Vmsa,
+ IN UINT32 ApicId,
+ IN BOOLEAN SetVmsa
+ )
+{
+ return EFI_UNSUPPORTED;
+}
|