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OvmfPkg/BaseMemEncryptSevLib: remove Flush parameter 

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3275

The Flush parameter is used to provide a hint whether the specified range
is Mmio address. Now that we have a dedicated helper to clear the
memory encryption mask for the Mmio address range, its safe to remove the
Flush parameter from MemEncryptSev{Set,Clear}PageEncMask().

Since the address specified in the MemEncryptSev{Set,Clear}PageEncMask()
points to a system RAM, thus a cache flush is required during the
encryption mask update.

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: Laszlo Ersek <lersek@redhat.com>
Cc: Erdem Aktas <erdemaktas@google.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Message-Id: <20210519181949.6574-14-brijesh.singh@amd.com>
This commit is contained in:
Brijesh Singh 2021-05-19 13:19:49 -05:00 committed by mergify[bot]
parent b4a8de5d27
commit adfa3327d4
10 changed files with 21 additions and 62 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
OvmfPkg/AmdSevDxe/AmdSevDxe.c
View File

@ -120,8 +120,7 @@ AmdSevDxeEntryPoint (
Status = MemEncryptSevClearPageEncMask (
0, // Cr3BaseAddress -- use current CR3
MapPagesBase, // BaseAddress
MapPagesCount, // NumPages
TRUE // Flush
MapPagesCount // NumPages
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "%a: MemEncryptSevClearPageEncMask(): %r\n",

10
OvmfPkg/Include/Library/MemEncryptSevLib.h
View File

@ -100,8 +100,6 @@ MemEncryptSevIsEnabled (
address of a memory region.
@param[in] NumPages The number of pages from start memory
region.
@param[in] Flush Flush the caches before clearing the bit
(mostly TRUE except MMIO addresses)
@retval RETURN_SUCCESS The attributes were cleared for the
memory region.
@ -114,8 +112,7 @@ EFIAPI
MemEncryptSevClearPageEncMask (
IN PHYSICAL_ADDRESS Cr3BaseAddress,
IN PHYSICAL_ADDRESS BaseAddress,
IN UINTN NumPages,
IN BOOLEAN Flush
IN UINTN NumPages
);
/**
@ -128,8 +125,6 @@ MemEncryptSevClearPageEncMask (
address of a memory region.
@param[in] NumPages The number of pages from start memory
region.
@param[in] Flush Flush the caches before setting the bit
(mostly TRUE except MMIO addresses)
@retval RETURN_SUCCESS The attributes were set for the memory
region.
@ -142,8 +137,7 @@ EFIAPI
MemEncryptSevSetPageEncMask (
IN PHYSICAL_ADDRESS Cr3BaseAddress,
IN PHYSICAL_ADDRESS BaseAddress,
IN UINTN NumPages,
IN BOOLEAN Flush
IN UINTN NumPages
);

6
OvmfPkg/IoMmuDxe/AmdSevIoMmu.c
View File

@ -252,8 +252,7 @@ IoMmuMap (
Status = MemEncryptSevClearPageEncMask (
0,
MapInfo->PlainTextAddress,
MapInfo->NumberOfPages,
TRUE
MapInfo->NumberOfPages
);
ASSERT_EFI_ERROR (Status);
if (EFI_ERROR (Status)) {
@ -407,8 +406,7 @@ IoMmuUnmapWorker (
Status = MemEncryptSevSetPageEncMask (
0,
MapInfo->PlainTextAddress,
MapInfo->NumberOfPages,
TRUE
MapInfo->NumberOfPages
);
ASSERT_EFI_ERROR (Status);
if (EFI_ERROR (Status)) {

10
OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c
View File

@ -25,8 +25,6 @@
address of a memory region.
@param[in] NumPages The number of pages from start memory
region.
@param[in] Flush Flush the caches before clearing the bit
(mostly TRUE except MMIO addresses)
@retval RETURN_SUCCESS The attributes were cleared for the
memory region.
@ -39,8 +37,7 @@ EFIAPI
MemEncryptSevClearPageEncMask (
IN PHYSICAL_ADDRESS Cr3BaseAddress,
IN PHYSICAL_ADDRESS BaseAddress,
IN UINTN NumPages,
IN BOOLEAN Flush
IN UINTN NumPages
)
{
//
@ -59,8 +56,6 @@ MemEncryptSevClearPageEncMask (
address of a memory region.
@param[in] NumPages The number of pages from start memory
region.
@param[in] Flush Flush the caches before setting the bit
(mostly TRUE except MMIO addresses)
@retval RETURN_SUCCESS The attributes were set for the memory
region.
@ -73,8 +68,7 @@ EFIAPI
MemEncryptSevSetPageEncMask (
IN PHYSICAL_ADDRESS Cr3BaseAddress,
IN PHYSICAL_ADDRESS BaseAddress,
IN UINTN NumPages,
IN BOOLEAN Flush
IN UINTN NumPages
)
{
//

16
OvmfPkg/Library/BaseMemEncryptSevLib/X64/MemEncryptSevLib.c
View File

@ -27,8 +27,6 @@
address of a memory region.
@param[in] NumPages The number of pages from start memory
region.
@param[in] Flush Flush the caches before clearing the bit
(mostly TRUE except MMIO addresses)
@retval RETURN_SUCCESS The attributes were cleared for the
memory region.
@ -41,15 +39,13 @@ EFIAPI
MemEncryptSevClearPageEncMask (
IN PHYSICAL_ADDRESS Cr3BaseAddress,
IN PHYSICAL_ADDRESS BaseAddress,
IN UINTN NumPages,
IN BOOLEAN Flush
IN UINTN NumPages
)
{
return InternalMemEncryptSevSetMemoryDecrypted (
Cr3BaseAddress,
BaseAddress,
EFI_PAGES_TO_SIZE (NumPages),
Flush
EFI_PAGES_TO_SIZE (NumPages)
);
}
@ -63,8 +59,6 @@ MemEncryptSevClearPageEncMask (
address of a memory region.
@param[in] NumPages The number of pages from start memory
region.
@param[in] Flush Flush the caches before setting the bit
(mostly TRUE except MMIO addresses)
@retval RETURN_SUCCESS The attributes were set for the memory
region.
@ -77,15 +71,13 @@ EFIAPI
MemEncryptSevSetPageEncMask (
IN PHYSICAL_ADDRESS Cr3BaseAddress,
IN PHYSICAL_ADDRESS BaseAddress,
IN UINTN NumPages,
IN BOOLEAN Flush
IN UINTN NumPages
)
{
return InternalMemEncryptSevSetMemoryEncrypted (
Cr3BaseAddress,
BaseAddress,
EFI_PAGES_TO_SIZE (NumPages),
Flush
EFI_PAGES_TO_SIZE (NumPages)
);
}

14
OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiDxeVirtualMemory.c
View File

@ -828,8 +828,6 @@ Done:
@param[in] PhysicalAddress The physical address that is the start
address of a memory region.
@param[in] Length The length of memory region
@param[in] Flush Flush the caches before applying the
encryption mask
@retval RETURN_SUCCESS The attributes were cleared for the
memory region.
@ -842,8 +840,7 @@ EFIAPI
InternalMemEncryptSevSetMemoryDecrypted (
IN PHYSICAL_ADDRESS Cr3BaseAddress,
IN PHYSICAL_ADDRESS PhysicalAddress,
IN UINTN Length,
IN BOOLEAN Flush
IN UINTN Length
)
{
@ -852,7 +849,7 @@ InternalMemEncryptSevSetMemoryDecrypted (
PhysicalAddress,
Length,
ClearCBit,
Flush
TRUE
);
}
@ -865,8 +862,6 @@ InternalMemEncryptSevSetMemoryDecrypted (
@param[in] PhysicalAddress The physical address that is the start
address of a memory region.
@param[in] Length The length of memory region
@param[in] Flush Flush the caches before applying the
encryption mask
@retval RETURN_SUCCESS The attributes were set for the memory
region.
@ -879,8 +874,7 @@ EFIAPI
InternalMemEncryptSevSetMemoryEncrypted (
IN PHYSICAL_ADDRESS Cr3BaseAddress,
IN PHYSICAL_ADDRESS PhysicalAddress,
IN UINTN Length,
IN BOOLEAN Flush
IN UINTN Length
)
{
return SetMemoryEncDec (
@ -888,7 +882,7 @@ InternalMemEncryptSevSetMemoryEncrypted (
PhysicalAddress,
Length,
SetCBit,
Flush
TRUE
);
}

8
OvmfPkg/Library/BaseMemEncryptSevLib/X64/SecVirtualMemory.c
View File

@ -42,8 +42,6 @@ InternalGetMemEncryptionAddressMask (
@param[in] PhysicalAddress The physical address that is the start
address of a memory region.
@param[in] Length The length of memory region
@param[in] Flush Flush the caches before applying the
encryption mask
@retval RETURN_SUCCESS The attributes were cleared for the
memory region.
@ -56,8 +54,7 @@ EFIAPI
InternalMemEncryptSevSetMemoryDecrypted (
IN PHYSICAL_ADDRESS Cr3BaseAddress,
IN PHYSICAL_ADDRESS PhysicalAddress,
IN UINTN Length,
IN BOOLEAN Flush
IN UINTN Length
)
{
//
@ -89,8 +86,7 @@ EFIAPI
InternalMemEncryptSevSetMemoryEncrypted (
IN PHYSICAL_ADDRESS Cr3BaseAddress,
IN PHYSICAL_ADDRESS PhysicalAddress,
IN UINTN Length,
IN BOOLEAN Flush
IN UINTN Length
)
{
//

10
OvmfPkg/Library/BaseMemEncryptSevLib/X64/VirtualMemory.h
View File

@ -58,8 +58,6 @@ InternalGetMemEncryptionAddressMask (
@param[in] PhysicalAddress The physical address that is the start
address of a memory region.
@param[in] Length The length of memory region
@param[in] Flush Flush the caches before applying the
encryption mask
@retval RETURN_SUCCESS The attributes were cleared for the
memory region.
@ -72,8 +70,7 @@ EFIAPI
InternalMemEncryptSevSetMemoryDecrypted (
IN PHYSICAL_ADDRESS Cr3BaseAddress,
IN PHYSICAL_ADDRESS PhysicalAddress,
IN UINTN Length,
IN BOOLEAN Flush
IN UINTN Length
);
/**
@ -85,8 +82,6 @@ InternalMemEncryptSevSetMemoryDecrypted (
@param[in] PhysicalAddress The physical address that is the start
address of a memory region.
@param[in] Length The length of memory region
@param[in] Flush Flush the caches before applying the
encryption mask
@retval RETURN_SUCCESS The attributes were set for the memory
region.
@ -99,8 +94,7 @@ EFIAPI
InternalMemEncryptSevSetMemoryEncrypted (
IN PHYSICAL_ADDRESS Cr3BaseAddress,
IN PHYSICAL_ADDRESS PhysicalAddress,
IN UINTN Length,
IN BOOLEAN Flush
IN UINTN Length
);
/**

3
OvmfPkg/Library/SmmCpuFeaturesLib/SmmCpuFeaturesLib.c
View File

@ -283,8 +283,7 @@ SmmCpuFeaturesSmmRelocationComplete (
Status = MemEncryptSevSetPageEncMask (
0, // Cr3BaseAddress -- use current CR3
MapPagesBase, // BaseAddress
MapPagesCount, // NumPages
TRUE // Flush
MapPagesCount // NumPages
);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "%a: MemEncryptSevSetPageEncMask(): %r\n",

3
OvmfPkg/PlatformPei/AmdSev.c
View File

@ -72,8 +72,7 @@ AmdSevEsInitialize (
DecryptStatus = MemEncryptSevClearPageEncMask (
0,
GhcbBasePa + EFI_PAGES_TO_SIZE (PageCount),
1,
TRUE
1
);
ASSERT_RETURN_ERROR (DecryptStatus);
}