* [PATCH 1/4] OvmfPkg: Realize EfiMemoryAcceptProtocol in AmdSevDxe
2022-09-23 20:34 [PATCHv2 0/4] Add safe unaccepted memory behavior Dionna Glaze
@ 2022-09-23 20:34 ` Dionna Glaze
2022-09-23 21:30 ` Lendacky, Thomas
2022-09-23 20:34 ` [PATCH 2/4] DxeMain accepts all memory at EBS if needed Dionna Glaze
` (2 subsequent siblings)
3 siblings, 1 reply; 9+ messages in thread
From: Dionna Glaze @ 2022-09-23 20:34 UTC (permalink / raw)
To: devel
Cc: Dionna Glaze, Gerd Hoffmann, James Bottomley, Jiewen Yao,
Tom Lendacky, Sophia Wolf
From: Sophia Wolf <phiawolf@google.com>
When a guest OS does not support unaccepted memory, the unaccepted
memory must be accepted before returning a memory map to the caller.
EfiMemoryAcceptProtocol is defined in MdePkg and is implementated /
Installed in AmdSevDxe for AMD SEV-SNP memory acceptance.
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Sophia Wolf <phiawolf@google.com>
---
OvmfPkg/AmdSevDxe/AmdSevDxe.c | 34 ++++++++++++++++++
OvmfPkg/AmdSevDxe/AmdSevDxe.inf | 3 ++
OvmfPkg/Include/Library/MemEncryptSevLib.h | 14 ++++++++
.../Ia32/MemEncryptSevLib.c | 17 +++++++++
.../X64/DxeSnpSystemRamValidate.c | 35 +++++++++++++++++++
.../X64/PeiSnpSystemRamValidate.c | 17 +++++++++
.../X64/SecSnpSystemRamValidate.c | 18 ++++++++++
7 files changed, 138 insertions(+)
diff --git a/OvmfPkg/AmdSevDxe/AmdSevDxe.c b/OvmfPkg/AmdSevDxe/AmdSevDxe.c
index 662d3c4ccb..6e3a1fc7d7 100644
--- a/OvmfPkg/AmdSevDxe/AmdSevDxe.c
+++ b/OvmfPkg/AmdSevDxe/AmdSevDxe.c
@@ -20,6 +20,7 @@
#include <Library/UefiBootServicesTableLib.h>
#include <Guid/ConfidentialComputingSevSnpBlob.h>
#include <Library/PcdLib.h>
+#include <Protocol/MemoryAccept.h>
STATIC CONFIDENTIAL_COMPUTING_SNP_BLOB_LOCATION mSnpBootDxeTable = {
SIGNATURE_32 ('A', 'M', 'D', 'E'),
@@ -31,6 +32,29 @@ STATIC CONFIDENTIAL_COMPUTING_SNP_BLOB_LOCATION mSnpBootDxeTable = {
FixedPcdGet32 (PcdOvmfCpuidSize),
};
+STATIC EFI_HANDLE mAmdSevDxeHandle = NULL;
+
+STATIC
+EFI_STATUS
+EFIAPI
+AmdSevMemoryAccept (
+ IN EFI_MEMORY_ACCEPT_PROTOCOL *This,
+ IN EFI_PHYSICAL_ADDRESS StartAddress,
+ IN UINTN Size
+)
+{
+ MemEncryptSnpAcceptPages (
+ StartAddress,
+ EFI_SIZE_TO_PAGES (Size)
+ );
+
+ return EFI_SUCCESS;
+}
+
+STATIC EFI_MEMORY_ACCEPT_PROTOCOL mMemoryAcceptProtocol = {
+ AmdSevMemoryAccept
+};
+
EFI_STATUS
EFIAPI
AmdSevDxeEntryPoint (
@@ -147,6 +171,16 @@ AmdSevDxeEntryPoint (
}
}
+ Status = gBS->InstallProtocolInterface (
+ &mAmdSevDxeHandle,
+ &gEfiMemoryAcceptProtocolGuid,
+ EFI_NATIVE_INTERFACE,
+ &mMemoryAcceptProtocol
+ );
+ if (EFI_ERROR (Status)) {
+ DEBUG ((DEBUG_ERROR, "Install EfiMemoryAcceptProtocol failed.\n"));
+ }
+
//
// If its SEV-SNP active guest then install the CONFIDENTIAL_COMPUTING_SEV_SNP_BLOB.
// It contains the location for both the Secrets and CPUID page.
diff --git a/OvmfPkg/AmdSevDxe/AmdSevDxe.inf b/OvmfPkg/AmdSevDxe/AmdSevDxe.inf
index 9acf860cf2..5ddddabc32 100644
--- a/OvmfPkg/AmdSevDxe/AmdSevDxe.inf
+++ b/OvmfPkg/AmdSevDxe/AmdSevDxe.inf
@@ -47,6 +47,9 @@
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSnpSecretsBase
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSnpSecretsSize
+[Protocols]
+ gEfiMemoryAcceptProtocolGuid
+
[Guids]
gConfidentialComputingSevSnpBlobGuid
diff --git a/OvmfPkg/Include/Library/MemEncryptSevLib.h b/OvmfPkg/Include/Library/MemEncryptSevLib.h
index 4fa9c0d700..05ec10471d 100644
--- a/OvmfPkg/Include/Library/MemEncryptSevLib.h
+++ b/OvmfPkg/Include/Library/MemEncryptSevLib.h
@@ -228,4 +228,18 @@ MemEncryptSevSnpPreValidateSystemRam (
IN UINTN NumPages
);
+/**
+ Accept pages system RAM when SEV-SNP is enabled in the guest VM.
+
+ @param[in] BaseAddress Base address
+ @param[in] NumPages Number of pages starting from the base address
+
+**/
+VOID
+EFIAPI
+MemEncryptSnpAcceptPages (
+ IN PHYSICAL_ADDRESS BaseAddress,
+ IN UINTN NumPages
+ );
+
#endif // _MEM_ENCRYPT_SEV_LIB_H_
diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c b/OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c
index f92299fc77..f0747d792e 100644
--- a/OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c
+++ b/OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c
@@ -153,3 +153,20 @@ MemEncryptSevSnpPreValidateSystemRam (
{
ASSERT (FALSE);
}
+
+/**
+ Accept pages system RAM when SEV-SNP is enabled in the guest VM.
+
+ @param[in] BaseAddress Base address
+ @param[in] NumPages Number of pages starting from the base address
+
+**/
+VOID
+EFIAPI
+MemEncryptSnpAcceptPages (
+ IN PHYSICAL_ADDRESS BaseAddress,
+ IN UINTN NumPages
+ )
+{
+ ASSERT (FALSE);
+}
diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/DxeSnpSystemRamValidate.c b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/DxeSnpSystemRamValidate.c
index d3a95e4913..7693e0ca66 100644
--- a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/DxeSnpSystemRamValidate.c
+++ b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/DxeSnpSystemRamValidate.c
@@ -14,6 +14,7 @@
#include <Library/MemEncryptSevLib.h>
#include "SnpPageStateChange.h"
+#include "VirtualMemory.h"
/**
Pre-validate the system RAM when SEV-SNP is enabled in the guest VM.
@@ -38,3 +39,37 @@ MemEncryptSevSnpPreValidateSystemRam (
//
ASSERT (FALSE);
}
+
+/**
+ Accept pages system RAM when SEV-SNP is enabled in the guest VM.
+
+ @param[in] BaseAddress Base address
+ @param[in] NumPages Number of pages starting from the base address
+
+**/
+VOID
+EFIAPI
+MemEncryptSnpAcceptPages (
+ IN PHYSICAL_ADDRESS BaseAddress,
+ IN UINTN NumPages
+ )
+{
+ EFI_STATUS Status;
+
+ if (!MemEncryptSevSnpIsEnabled ()) {
+ return;
+ }
+ if (BaseAddress >= SIZE_4GB) {
+ Status = InternalMemEncryptSevCreateIdentityMap1G (
+ 0,
+ BaseAddress,
+ EFI_PAGES_TO_SIZE (NumPages)
+ );
+ if (EFI_ERROR (Status)) {
+ ASSERT (FALSE);
+ CpuDeadLoop ();
+ }
+ }
+
+ InternalSetPageState (BaseAddress, NumPages, SevSnpPagePrivate, TRUE);
+}
diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiSnpSystemRamValidate.c b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiSnpSystemRamValidate.c
index 4970165444..1c52bfe691 100644
--- a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiSnpSystemRamValidate.c
+++ b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiSnpSystemRamValidate.c
@@ -126,3 +126,20 @@ MemEncryptSevSnpPreValidateSystemRam (
BaseAddress = EndAddress;
}
}
+
+/**
+ Accept pages system RAM when SEV-SNP is enabled in the guest VM.
+
+ @param[in] BaseAddress Base address
+ @param[in] NumPages Number of pages starting from the base address
+
+**/
+VOID
+EFIAPI
+MemEncryptSnpAcceptPages (
+ IN PHYSICAL_ADDRESS BaseAddress,
+ IN UINTN NumPages
+ )
+{
+ ASSERT (FALSE);
+}
diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SecSnpSystemRamValidate.c b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SecSnpSystemRamValidate.c
index 7797febb8a..edfebf6ef4 100644
--- a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SecSnpSystemRamValidate.c
+++ b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SecSnpSystemRamValidate.c
@@ -10,6 +10,7 @@
#include <Uefi/UefiBaseType.h>
#include <Library/BaseLib.h>
+#include <Library/DebugLib.h>
#include <Library/MemEncryptSevLib.h>
#include "SnpPageStateChange.h"
@@ -80,3 +81,20 @@ MemEncryptSevSnpPreValidateSystemRam (
InternalSetPageState (BaseAddress, NumPages, SevSnpPagePrivate, TRUE);
}
+
+/**
+ Accept pages system RAM when SEV-SNP is enabled in the guest VM.
+
+ @param[in] BaseAddress Base address
+ @param[in] NumPages Number of pages starting from the base address
+
+**/
+VOID
+EFIAPI
+MemEncryptSnpAcceptPages (
+ IN PHYSICAL_ADDRESS BaseAddress,
+ IN UINTN NumPages
+ )
+{
+ ASSERT(FALSE);
+}
--
2.37.3.998.g577e59143f-goog
^ permalink raw reply related [flat|nested] 9+ messages in thread* Re: [PATCH 1/4] OvmfPkg: Realize EfiMemoryAcceptProtocol in AmdSevDxe
2022-09-23 20:34 ` [PATCH 1/4] OvmfPkg: Realize EfiMemoryAcceptProtocol in AmdSevDxe Dionna Glaze
@ 2022-09-23 21:30 ` Lendacky, Thomas
2022-09-26 15:56 ` Dionna Glaze
0 siblings, 1 reply; 9+ messages in thread
From: Lendacky, Thomas @ 2022-09-23 21:30 UTC (permalink / raw)
To: Dionna Glaze, devel
Cc: Gerd Hoffmann, James Bottomley, Jiewen Yao, Sophia Wolf
On 9/23/22 15:34, Dionna Glaze wrote:
> From: Sophia Wolf <phiawolf@google.com>
>
> When a guest OS does not support unaccepted memory, the unaccepted
> memory must be accepted before returning a memory map to the caller.
>
> EfiMemoryAcceptProtocol is defined in MdePkg and is implementated /
> Installed in AmdSevDxe for AMD SEV-SNP memory acceptance.
>
Shouldn't this have a v2 in the subject (same goes for patch 2/4)?
I didn't see an answer as to why you couldn't use the
MemEncryptSevSnpPreValidateSystemRam() function in
OvmfPkg/Library/BaseMemEncryptSevLib/X64/DxeSnpSystemRamValidate.c to
accomplish this without introducing a whole new interface to the
MemEncryptSevLib library.
Also, to better see the paths in the diffstat, I recommend using:
--diff-options "--stat=1000 --stat-graph-width=20"
Thanks,
Tom
> Cc: Gerd Hoffmann <kraxel@redhat.com>
> Cc: James Bottomley <jejb@linux.ibm.com>
> Cc: Jiewen Yao <jiewen.yao@intel.com>
> Cc: Tom Lendacky <thomas.lendacky@amd.com>
>
> Signed-off-by: Sophia Wolf <phiawolf@google.com>
> ---
> OvmfPkg/AmdSevDxe/AmdSevDxe.c | 34 ++++++++++++++++++
> OvmfPkg/AmdSevDxe/AmdSevDxe.inf | 3 ++
> OvmfPkg/Include/Library/MemEncryptSevLib.h | 14 ++++++++
> .../Ia32/MemEncryptSevLib.c | 17 +++++++++
> .../X64/DxeSnpSystemRamValidate.c | 35 +++++++++++++++++++
> .../X64/PeiSnpSystemRamValidate.c | 17 +++++++++
> .../X64/SecSnpSystemRamValidate.c | 18 ++++++++++
> 7 files changed, 138 insertions(+)
>
> diff --git a/OvmfPkg/AmdSevDxe/AmdSevDxe.c b/OvmfPkg/AmdSevDxe/AmdSevDxe.c
> index 662d3c4ccb..6e3a1fc7d7 100644
> --- a/OvmfPkg/AmdSevDxe/AmdSevDxe.c
> +++ b/OvmfPkg/AmdSevDxe/AmdSevDxe.c
> @@ -20,6 +20,7 @@
> #include <Library/UefiBootServicesTableLib.h>
> #include <Guid/ConfidentialComputingSevSnpBlob.h>
> #include <Library/PcdLib.h>
> +#include <Protocol/MemoryAccept.h>
>
> STATIC CONFIDENTIAL_COMPUTING_SNP_BLOB_LOCATION mSnpBootDxeTable = {
> SIGNATURE_32 ('A', 'M', 'D', 'E'),
> @@ -31,6 +32,29 @@ STATIC CONFIDENTIAL_COMPUTING_SNP_BLOB_LOCATION mSnpBootDxeTable = {
> FixedPcdGet32 (PcdOvmfCpuidSize),
> };
>
> +STATIC EFI_HANDLE mAmdSevDxeHandle = NULL;
> +
> +STATIC
> +EFI_STATUS
> +EFIAPI
> +AmdSevMemoryAccept (
> + IN EFI_MEMORY_ACCEPT_PROTOCOL *This,
> + IN EFI_PHYSICAL_ADDRESS StartAddress,
> + IN UINTN Size
> +)
> +{
> + MemEncryptSnpAcceptPages (
> + StartAddress,
> + EFI_SIZE_TO_PAGES (Size)
> + );
> +
> + return EFI_SUCCESS;
> +}
> +
> +STATIC EFI_MEMORY_ACCEPT_PROTOCOL mMemoryAcceptProtocol = {
> + AmdSevMemoryAccept
> +};
> +
> EFI_STATUS
> EFIAPI
> AmdSevDxeEntryPoint (
> @@ -147,6 +171,16 @@ AmdSevDxeEntryPoint (
> }
> }
>
> + Status = gBS->InstallProtocolInterface (
> + &mAmdSevDxeHandle,
> + &gEfiMemoryAcceptProtocolGuid,
> + EFI_NATIVE_INTERFACE,
> + &mMemoryAcceptProtocol
> + );
> + if (EFI_ERROR (Status)) {
> + DEBUG ((DEBUG_ERROR, "Install EfiMemoryAcceptProtocol failed.\n"));
> + }
> +
> //
> // If its SEV-SNP active guest then install the CONFIDENTIAL_COMPUTING_SEV_SNP_BLOB.
> // It contains the location for both the Secrets and CPUID page.
> diff --git a/OvmfPkg/AmdSevDxe/AmdSevDxe.inf b/OvmfPkg/AmdSevDxe/AmdSevDxe.inf
> index 9acf860cf2..5ddddabc32 100644
> --- a/OvmfPkg/AmdSevDxe/AmdSevDxe.inf
> +++ b/OvmfPkg/AmdSevDxe/AmdSevDxe.inf
> @@ -47,6 +47,9 @@
> gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSnpSecretsBase
> gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSnpSecretsSize
>
> +[Protocols]
> + gEfiMemoryAcceptProtocolGuid
> +
> [Guids]
> gConfidentialComputingSevSnpBlobGuid
>
> diff --git a/OvmfPkg/Include/Library/MemEncryptSevLib.h b/OvmfPkg/Include/Library/MemEncryptSevLib.h
> index 4fa9c0d700..05ec10471d 100644
> --- a/OvmfPkg/Include/Library/MemEncryptSevLib.h
> +++ b/OvmfPkg/Include/Library/MemEncryptSevLib.h
> @@ -228,4 +228,18 @@ MemEncryptSevSnpPreValidateSystemRam (
> IN UINTN NumPages
> );
>
> +/**
> + Accept pages system RAM when SEV-SNP is enabled in the guest VM.
> +
> + @param[in] BaseAddress Base address
> + @param[in] NumPages Number of pages starting from the base address
> +
> +**/
> +VOID
> +EFIAPI
> +MemEncryptSnpAcceptPages (
> + IN PHYSICAL_ADDRESS BaseAddress,
> + IN UINTN NumPages
> + );
> +
> #endif // _MEM_ENCRYPT_SEV_LIB_H_
> diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c b/OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c
> index f92299fc77..f0747d792e 100644
> --- a/OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c
> +++ b/OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c
> @@ -153,3 +153,20 @@ MemEncryptSevSnpPreValidateSystemRam (
> {
> ASSERT (FALSE);
> }
> +
> +/**
> + Accept pages system RAM when SEV-SNP is enabled in the guest VM.
> +
> + @param[in] BaseAddress Base address
> + @param[in] NumPages Number of pages starting from the base address
> +
> +**/
> +VOID
> +EFIAPI
> +MemEncryptSnpAcceptPages (
> + IN PHYSICAL_ADDRESS BaseAddress,
> + IN UINTN NumPages
> + )
> +{
> + ASSERT (FALSE);
> +}
> diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/DxeSnpSystemRamValidate.c b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/DxeSnpSystemRamValidate.c
> index d3a95e4913..7693e0ca66 100644
> --- a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/DxeSnpSystemRamValidate.c
> +++ b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/DxeSnpSystemRamValidate.c
> @@ -14,6 +14,7 @@
> #include <Library/MemEncryptSevLib.h>
>
> #include "SnpPageStateChange.h"
> +#include "VirtualMemory.h"
>
> /**
> Pre-validate the system RAM when SEV-SNP is enabled in the guest VM.
> @@ -38,3 +39,37 @@ MemEncryptSevSnpPreValidateSystemRam (
> //
> ASSERT (FALSE);
> }
> +
> +/**
> + Accept pages system RAM when SEV-SNP is enabled in the guest VM.
> +
> + @param[in] BaseAddress Base address
> + @param[in] NumPages Number of pages starting from the base address
> +
> +**/
> +VOID
> +EFIAPI
> +MemEncryptSnpAcceptPages (
> + IN PHYSICAL_ADDRESS BaseAddress,
> + IN UINTN NumPages
> + )
> +{
> + EFI_STATUS Status;
> +
> + if (!MemEncryptSevSnpIsEnabled ()) {
> + return;
> + }
> + if (BaseAddress >= SIZE_4GB) {
> + Status = InternalMemEncryptSevCreateIdentityMap1G (
> + 0,
> + BaseAddress,
> + EFI_PAGES_TO_SIZE (NumPages)
> + );
> + if (EFI_ERROR (Status)) {
> + ASSERT (FALSE);
> + CpuDeadLoop ();
> + }
> + }
> +
> + InternalSetPageState (BaseAddress, NumPages, SevSnpPagePrivate, TRUE);
> +}
> diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiSnpSystemRamValidate.c b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiSnpSystemRamValidate.c
> index 4970165444..1c52bfe691 100644
> --- a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiSnpSystemRamValidate.c
> +++ b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiSnpSystemRamValidate.c
> @@ -126,3 +126,20 @@ MemEncryptSevSnpPreValidateSystemRam (
> BaseAddress = EndAddress;
> }
> }
> +
> +/**
> + Accept pages system RAM when SEV-SNP is enabled in the guest VM.
> +
> + @param[in] BaseAddress Base address
> + @param[in] NumPages Number of pages starting from the base address
> +
> +**/
> +VOID
> +EFIAPI
> +MemEncryptSnpAcceptPages (
> + IN PHYSICAL_ADDRESS BaseAddress,
> + IN UINTN NumPages
> + )
> +{
> + ASSERT (FALSE);
> +}
> diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SecSnpSystemRamValidate.c b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SecSnpSystemRamValidate.c
> index 7797febb8a..edfebf6ef4 100644
> --- a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SecSnpSystemRamValidate.c
> +++ b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SecSnpSystemRamValidate.c
> @@ -10,6 +10,7 @@
>
> #include <Uefi/UefiBaseType.h>
> #include <Library/BaseLib.h>
> +#include <Library/DebugLib.h>
> #include <Library/MemEncryptSevLib.h>
>
> #include "SnpPageStateChange.h"
> @@ -80,3 +81,20 @@ MemEncryptSevSnpPreValidateSystemRam (
>
> InternalSetPageState (BaseAddress, NumPages, SevSnpPagePrivate, TRUE);
> }
> +
> +/**
> + Accept pages system RAM when SEV-SNP is enabled in the guest VM.
> +
> + @param[in] BaseAddress Base address
> + @param[in] NumPages Number of pages starting from the base address
> +
> +**/
> +VOID
> +EFIAPI
> +MemEncryptSnpAcceptPages (
> + IN PHYSICAL_ADDRESS BaseAddress,
> + IN UINTN NumPages
> + )
> +{
> + ASSERT(FALSE);
> +}
^ permalink raw reply [flat|nested] 9+ messages in thread* Re: [PATCH 1/4] OvmfPkg: Realize EfiMemoryAcceptProtocol in AmdSevDxe
2022-09-23 21:30 ` Lendacky, Thomas
@ 2022-09-26 15:56 ` Dionna Glaze
2022-09-26 18:14 ` [edk2-devel] " Rebecca Cran
0 siblings, 1 reply; 9+ messages in thread
From: Dionna Glaze @ 2022-09-26 15:56 UTC (permalink / raw)
To: Tom Lendacky
Cc: devel, Gerd Hoffmann, James Bottomley, Jiewen Yao, Sophia Wolf
>
> Shouldn't this have a v2 in the subject (same goes for patch 2/4)?
>
Yes. I'm upset that didn't happen. I used --subject="PATCHv2" in git
send-email, and editing the cover letter showed that all the other
emails would have PATCHv2 in the subject. Then I said to send the
emails and saw "PATCH " get sent out anyway :(
> I didn't see an answer as to why you couldn't use the
> MemEncryptSevSnpPreValidateSystemRam() function in
> OvmfPkg/Library/BaseMemEncryptSevLib/X64/DxeSnpSystemRamValidate.c to
> accomplish this without introducing a whole new interface to the
> MemEncryptSevLib library.
>
We could do the acceptance in the DXE implementation of
MemEncryptSevSnpPreValidateSystemRam.
I wasn't 100% on whether the same name function name should be used in
two very different roles.
I'll change it for v3.
> Also, to better see the paths in the diffstat, I recommend using:
> --diff-options "--stat=1000 --stat-graph-width=20"
>
Will do, thanks.
> Thanks,
> Tom
>
> > Cc: Gerd Hoffmann <kraxel@redhat.com>
> > Cc: James Bottomley <jejb@linux.ibm.com>
> > Cc: Jiewen Yao <jiewen.yao@intel.com>
> > Cc: Tom Lendacky <thomas.lendacky@amd.com>
> >
> > Signed-off-by: Sophia Wolf <phiawolf@google.com>
> > ---
> > OvmfPkg/AmdSevDxe/AmdSevDxe.c | 34 ++++++++++++++++++
> > OvmfPkg/AmdSevDxe/AmdSevDxe.inf | 3 ++
> > OvmfPkg/Include/Library/MemEncryptSevLib.h | 14 ++++++++
> > .../Ia32/MemEncryptSevLib.c | 17 +++++++++
> > .../X64/DxeSnpSystemRamValidate.c | 35 +++++++++++++++++++
> > .../X64/PeiSnpSystemRamValidate.c | 17 +++++++++
> > .../X64/SecSnpSystemRamValidate.c | 18 ++++++++++
> > 7 files changed, 138 insertions(+)
> >
> > diff --git a/OvmfPkg/AmdSevDxe/AmdSevDxe.c b/OvmfPkg/AmdSevDxe/AmdSevDxe.c
> > index 662d3c4ccb..6e3a1fc7d7 100644
> > --- a/OvmfPkg/AmdSevDxe/AmdSevDxe.c
> > +++ b/OvmfPkg/AmdSevDxe/AmdSevDxe.c
> > @@ -20,6 +20,7 @@
> > #include <Library/UefiBootServicesTableLib.h>
> > #include <Guid/ConfidentialComputingSevSnpBlob.h>
> > #include <Library/PcdLib.h>
> > +#include <Protocol/MemoryAccept.h>
> >
> > STATIC CONFIDENTIAL_COMPUTING_SNP_BLOB_LOCATION mSnpBootDxeTable = {
> > SIGNATURE_32 ('A', 'M', 'D', 'E'),
> > @@ -31,6 +32,29 @@ STATIC CONFIDENTIAL_COMPUTING_SNP_BLOB_LOCATION mSnpBootDxeTable = {
> > FixedPcdGet32 (PcdOvmfCpuidSize),
> > };
> >
> > +STATIC EFI_HANDLE mAmdSevDxeHandle = NULL;
> > +
> > +STATIC
> > +EFI_STATUS
> > +EFIAPI
> > +AmdSevMemoryAccept (
> > + IN EFI_MEMORY_ACCEPT_PROTOCOL *This,
> > + IN EFI_PHYSICAL_ADDRESS StartAddress,
> > + IN UINTN Size
> > +)
> > +{
> > + MemEncryptSnpAcceptPages (
> > + StartAddress,
> > + EFI_SIZE_TO_PAGES (Size)
> > + );
> > +
> > + return EFI_SUCCESS;
> > +}
> > +
> > +STATIC EFI_MEMORY_ACCEPT_PROTOCOL mMemoryAcceptProtocol = {
> > + AmdSevMemoryAccept
> > +};
> > +
> > EFI_STATUS
> > EFIAPI
> > AmdSevDxeEntryPoint (
> > @@ -147,6 +171,16 @@ AmdSevDxeEntryPoint (
> > }
> > }
> >
> > + Status = gBS->InstallProtocolInterface (
> > + &mAmdSevDxeHandle,
> > + &gEfiMemoryAcceptProtocolGuid,
> > + EFI_NATIVE_INTERFACE,
> > + &mMemoryAcceptProtocol
> > + );
> > + if (EFI_ERROR (Status)) {
> > + DEBUG ((DEBUG_ERROR, "Install EfiMemoryAcceptProtocol failed.\n"));
> > + }
> > +
> > //
> > // If its SEV-SNP active guest then install the CONFIDENTIAL_COMPUTING_SEV_SNP_BLOB.
> > // It contains the location for both the Secrets and CPUID page.
> > diff --git a/OvmfPkg/AmdSevDxe/AmdSevDxe.inf b/OvmfPkg/AmdSevDxe/AmdSevDxe.inf
> > index 9acf860cf2..5ddddabc32 100644
> > --- a/OvmfPkg/AmdSevDxe/AmdSevDxe.inf
> > +++ b/OvmfPkg/AmdSevDxe/AmdSevDxe.inf
> > @@ -47,6 +47,9 @@
> > gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSnpSecretsBase
> > gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSnpSecretsSize
> >
> > +[Protocols]
> > + gEfiMemoryAcceptProtocolGuid
> > +
> > [Guids]
> > gConfidentialComputingSevSnpBlobGuid
> >
> > diff --git a/OvmfPkg/Include/Library/MemEncryptSevLib.h b/OvmfPkg/Include/Library/MemEncryptSevLib.h
> > index 4fa9c0d700..05ec10471d 100644
> > --- a/OvmfPkg/Include/Library/MemEncryptSevLib.h
> > +++ b/OvmfPkg/Include/Library/MemEncryptSevLib.h
> > @@ -228,4 +228,18 @@ MemEncryptSevSnpPreValidateSystemRam (
> > IN UINTN NumPages
> > );
> >
> > +/**
> > + Accept pages system RAM when SEV-SNP is enabled in the guest VM.
> > +
> > + @param[in] BaseAddress Base address
> > + @param[in] NumPages Number of pages starting from the base address
> > +
> > +**/
> > +VOID
> > +EFIAPI
> > +MemEncryptSnpAcceptPages (
> > + IN PHYSICAL_ADDRESS BaseAddress,
> > + IN UINTN NumPages
> > + );
> > +
> > #endif // _MEM_ENCRYPT_SEV_LIB_H_
> > diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c b/OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c
> > index f92299fc77..f0747d792e 100644
> > --- a/OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c
> > +++ b/OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c
> > @@ -153,3 +153,20 @@ MemEncryptSevSnpPreValidateSystemRam (
> > {
> > ASSERT (FALSE);
> > }
> > +
> > +/**
> > + Accept pages system RAM when SEV-SNP is enabled in the guest VM.
> > +
> > + @param[in] BaseAddress Base address
> > + @param[in] NumPages Number of pages starting from the base address
> > +
> > +**/
> > +VOID
> > +EFIAPI
> > +MemEncryptSnpAcceptPages (
> > + IN PHYSICAL_ADDRESS BaseAddress,
> > + IN UINTN NumPages
> > + )
> > +{
> > + ASSERT (FALSE);
> > +}
> > diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/DxeSnpSystemRamValidate.c b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/DxeSnpSystemRamValidate.c
> > index d3a95e4913..7693e0ca66 100644
> > --- a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/DxeSnpSystemRamValidate.c
> > +++ b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/DxeSnpSystemRamValidate.c
> > @@ -14,6 +14,7 @@
> > #include <Library/MemEncryptSevLib.h>
> >
> > #include "SnpPageStateChange.h"
> > +#include "VirtualMemory.h"
> >
> > /**
> > Pre-validate the system RAM when SEV-SNP is enabled in the guest VM.
> > @@ -38,3 +39,37 @@ MemEncryptSevSnpPreValidateSystemRam (
> > //
> > ASSERT (FALSE);
> > }
> > +
> > +/**
> > + Accept pages system RAM when SEV-SNP is enabled in the guest VM.
> > +
> > + @param[in] BaseAddress Base address
> > + @param[in] NumPages Number of pages starting from the base address
> > +
> > +**/
> > +VOID
> > +EFIAPI
> > +MemEncryptSnpAcceptPages (
> > + IN PHYSICAL_ADDRESS BaseAddress,
> > + IN UINTN NumPages
> > + )
> > +{
> > + EFI_STATUS Status;
> > +
> > + if (!MemEncryptSevSnpIsEnabled ()) {
> > + return;
> > + }
> > + if (BaseAddress >= SIZE_4GB) {
> > + Status = InternalMemEncryptSevCreateIdentityMap1G (
> > + 0,
> > + BaseAddress,
> > + EFI_PAGES_TO_SIZE (NumPages)
> > + );
> > + if (EFI_ERROR (Status)) {
> > + ASSERT (FALSE);
> > + CpuDeadLoop ();
> > + }
> > + }
> > +
> > + InternalSetPageState (BaseAddress, NumPages, SevSnpPagePrivate, TRUE);
> > +}
> > diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiSnpSystemRamValidate.c b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiSnpSystemRamValidate.c
> > index 4970165444..1c52bfe691 100644
> > --- a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiSnpSystemRamValidate.c
> > +++ b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiSnpSystemRamValidate.c
> > @@ -126,3 +126,20 @@ MemEncryptSevSnpPreValidateSystemRam (
> > BaseAddress = EndAddress;
> > }
> > }
> > +
> > +/**
> > + Accept pages system RAM when SEV-SNP is enabled in the guest VM.
> > +
> > + @param[in] BaseAddress Base address
> > + @param[in] NumPages Number of pages starting from the base address
> > +
> > +**/
> > +VOID
> > +EFIAPI
> > +MemEncryptSnpAcceptPages (
> > + IN PHYSICAL_ADDRESS BaseAddress,
> > + IN UINTN NumPages
> > + )
> > +{
> > + ASSERT (FALSE);
> > +}
> > diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SecSnpSystemRamValidate.c b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SecSnpSystemRamValidate.c
> > index 7797febb8a..edfebf6ef4 100644
> > --- a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SecSnpSystemRamValidate.c
> > +++ b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SecSnpSystemRamValidate.c
> > @@ -10,6 +10,7 @@
> >
> > #include <Uefi/UefiBaseType.h>
> > #include <Library/BaseLib.h>
> > +#include <Library/DebugLib.h>
> > #include <Library/MemEncryptSevLib.h>
> >
> > #include "SnpPageStateChange.h"
> > @@ -80,3 +81,20 @@ MemEncryptSevSnpPreValidateSystemRam (
> >
> > InternalSetPageState (BaseAddress, NumPages, SevSnpPagePrivate, TRUE);
> > }
> > +
> > +/**
> > + Accept pages system RAM when SEV-SNP is enabled in the guest VM.
> > +
> > + @param[in] BaseAddress Base address
> > + @param[in] NumPages Number of pages starting from the base address
> > +
> > +**/
> > +VOID
> > +EFIAPI
> > +MemEncryptSnpAcceptPages (
> > + IN PHYSICAL_ADDRESS BaseAddress,
> > + IN UINTN NumPages
> > + )
> > +{
> > + ASSERT(FALSE);
> > +}
--
-Dionna Glaze, PhD (she/her)
^ permalink raw reply [flat|nested] 9+ messages in thread* Re: [edk2-devel] [PATCH 1/4] OvmfPkg: Realize EfiMemoryAcceptProtocol in AmdSevDxe
2022-09-26 15:56 ` Dionna Glaze
@ 2022-09-26 18:14 ` Rebecca Cran
0 siblings, 0 replies; 9+ messages in thread
From: Rebecca Cran @ 2022-09-26 18:14 UTC (permalink / raw)
To: devel, dionnaglaze, Tom Lendacky
Cc: Gerd Hoffmann, James Bottomley, Jiewen Yao, Sophia Wolf
You should use -v2 -v3 -v4 etc. to specify the patch version.
On Mon, Sep 26, 2022, at 8:56 AM, Dionna Glaze via groups.io wrote:
>>
>> Shouldn't this have a v2 in the subject (same goes for patch 2/4)?
>>
>
> Yes. I'm upset that didn't happen. I used --subject="PATCHv2" in git
> send-email, and editing the cover letter showed that all the other
> emails would have PATCHv2 in the subject. Then I said to send the
> emails and saw "PATCH " get sent out anyway :(
>
>> I didn't see an answer as to why you couldn't use the
>> MemEncryptSevSnpPreValidateSystemRam() function in
>> OvmfPkg/Library/BaseMemEncryptSevLib/X64/DxeSnpSystemRamValidate.c to
>> accomplish this without introducing a whole new interface to the
>> MemEncryptSevLib library.
>>
>
> We could do the acceptance in the DXE implementation of
> MemEncryptSevSnpPreValidateSystemRam.
> I wasn't 100% on whether the same name function name should be used in
> two very different roles.
> I'll change it for v3.
>
>> Also, to better see the paths in the diffstat, I recommend using:
>> --diff-options "--stat=1000 --stat-graph-width=20"
>>
>
> Will do, thanks.
>
>> Thanks,
>> Tom
>>
>> > Cc: Gerd Hoffmann <kraxel@redhat.com>
>> > Cc: James Bottomley <jejb@linux.ibm.com>
>> > Cc: Jiewen Yao <jiewen.yao@intel.com>
>> > Cc: Tom Lendacky <thomas.lendacky@amd.com>
>> >
>> > Signed-off-by: Sophia Wolf <phiawolf@google.com>
>> > ---
>> > OvmfPkg/AmdSevDxe/AmdSevDxe.c | 34 ++++++++++++++++++
>> > OvmfPkg/AmdSevDxe/AmdSevDxe.inf | 3 ++
>> > OvmfPkg/Include/Library/MemEncryptSevLib.h | 14 ++++++++
>> > .../Ia32/MemEncryptSevLib.c | 17 +++++++++
>> > .../X64/DxeSnpSystemRamValidate.c | 35 +++++++++++++++++++
>> > .../X64/PeiSnpSystemRamValidate.c | 17 +++++++++
>> > .../X64/SecSnpSystemRamValidate.c | 18 ++++++++++
>> > 7 files changed, 138 insertions(+)
>> >
>> > diff --git a/OvmfPkg/AmdSevDxe/AmdSevDxe.c b/OvmfPkg/AmdSevDxe/AmdSevDxe.c
>> > index 662d3c4ccb..6e3a1fc7d7 100644
>> > --- a/OvmfPkg/AmdSevDxe/AmdSevDxe.c
>> > +++ b/OvmfPkg/AmdSevDxe/AmdSevDxe.c
>> > @@ -20,6 +20,7 @@
>> > #include <Library/UefiBootServicesTableLib.h>
>> > #include <Guid/ConfidentialComputingSevSnpBlob.h>
>> > #include <Library/PcdLib.h>
>> > +#include <Protocol/MemoryAccept.h>
>> >
>> > STATIC CONFIDENTIAL_COMPUTING_SNP_BLOB_LOCATION mSnpBootDxeTable = {
>> > SIGNATURE_32 ('A', 'M', 'D', 'E'),
>> > @@ -31,6 +32,29 @@ STATIC CONFIDENTIAL_COMPUTING_SNP_BLOB_LOCATION mSnpBootDxeTable = {
>> > FixedPcdGet32 (PcdOvmfCpuidSize),
>> > };
>> >
>> > +STATIC EFI_HANDLE mAmdSevDxeHandle = NULL;
>> > +
>> > +STATIC
>> > +EFI_STATUS
>> > +EFIAPI
>> > +AmdSevMemoryAccept (
>> > + IN EFI_MEMORY_ACCEPT_PROTOCOL *This,
>> > + IN EFI_PHYSICAL_ADDRESS StartAddress,
>> > + IN UINTN Size
>> > +)
>> > +{
>> > + MemEncryptSnpAcceptPages (
>> > + StartAddress,
>> > + EFI_SIZE_TO_PAGES (Size)
>> > + );
>> > +
>> > + return EFI_SUCCESS;
>> > +}
>> > +
>> > +STATIC EFI_MEMORY_ACCEPT_PROTOCOL mMemoryAcceptProtocol = {
>> > + AmdSevMemoryAccept
>> > +};
>> > +
>> > EFI_STATUS
>> > EFIAPI
>> > AmdSevDxeEntryPoint (
>> > @@ -147,6 +171,16 @@ AmdSevDxeEntryPoint (
>> > }
>> > }
>> >
>> > + Status = gBS->InstallProtocolInterface (
>> > + &mAmdSevDxeHandle,
>> > + &gEfiMemoryAcceptProtocolGuid,
>> > + EFI_NATIVE_INTERFACE,
>> > + &mMemoryAcceptProtocol
>> > + );
>> > + if (EFI_ERROR (Status)) {
>> > + DEBUG ((DEBUG_ERROR, "Install EfiMemoryAcceptProtocol failed.\n"));
>> > + }
>> > +
>> > //
>> > // If its SEV-SNP active guest then install the CONFIDENTIAL_COMPUTING_SEV_SNP_BLOB.
>> > // It contains the location for both the Secrets and CPUID page.
>> > diff --git a/OvmfPkg/AmdSevDxe/AmdSevDxe.inf b/OvmfPkg/AmdSevDxe/AmdSevDxe.inf
>> > index 9acf860cf2..5ddddabc32 100644
>> > --- a/OvmfPkg/AmdSevDxe/AmdSevDxe.inf
>> > +++ b/OvmfPkg/AmdSevDxe/AmdSevDxe.inf
>> > @@ -47,6 +47,9 @@
>> > gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSnpSecretsBase
>> > gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSnpSecretsSize
>> >
>> > +[Protocols]
>> > + gEfiMemoryAcceptProtocolGuid
>> > +
>> > [Guids]
>> > gConfidentialComputingSevSnpBlobGuid
>> >
>> > diff --git a/OvmfPkg/Include/Library/MemEncryptSevLib.h b/OvmfPkg/Include/Library/MemEncryptSevLib.h
>> > index 4fa9c0d700..05ec10471d 100644
>> > --- a/OvmfPkg/Include/Library/MemEncryptSevLib.h
>> > +++ b/OvmfPkg/Include/Library/MemEncryptSevLib.h
>> > @@ -228,4 +228,18 @@ MemEncryptSevSnpPreValidateSystemRam (
>> > IN UINTN NumPages
>> > );
>> >
>> > +/**
>> > + Accept pages system RAM when SEV-SNP is enabled in the guest VM.
>> > +
>> > + @param[in] BaseAddress Base address
>> > + @param[in] NumPages Number of pages starting from the base address
>> > +
>> > +**/
>> > +VOID
>> > +EFIAPI
>> > +MemEncryptSnpAcceptPages (
>> > + IN PHYSICAL_ADDRESS BaseAddress,
>> > + IN UINTN NumPages
>> > + );
>> > +
>> > #endif // _MEM_ENCRYPT_SEV_LIB_H_
>> > diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c b/OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c
>> > index f92299fc77..f0747d792e 100644
>> > --- a/OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c
>> > +++ b/OvmfPkg/Library/BaseMemEncryptSevLib/Ia32/MemEncryptSevLib.c
>> > @@ -153,3 +153,20 @@ MemEncryptSevSnpPreValidateSystemRam (
>> > {
>> > ASSERT (FALSE);
>> > }
>> > +
>> > +/**
>> > + Accept pages system RAM when SEV-SNP is enabled in the guest VM.
>> > +
>> > + @param[in] BaseAddress Base address
>> > + @param[in] NumPages Number of pages starting from the base address
>> > +
>> > +**/
>> > +VOID
>> > +EFIAPI
>> > +MemEncryptSnpAcceptPages (
>> > + IN PHYSICAL_ADDRESS BaseAddress,
>> > + IN UINTN NumPages
>> > + )
>> > +{
>> > + ASSERT (FALSE);
>> > +}
>> > diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/DxeSnpSystemRamValidate.c b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/DxeSnpSystemRamValidate.c
>> > index d3a95e4913..7693e0ca66 100644
>> > --- a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/DxeSnpSystemRamValidate.c
>> > +++ b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/DxeSnpSystemRamValidate.c
>> > @@ -14,6 +14,7 @@
>> > #include <Library/MemEncryptSevLib.h>
>> >
>> > #include "SnpPageStateChange.h"
>> > +#include "VirtualMemory.h"
>> >
>> > /**
>> > Pre-validate the system RAM when SEV-SNP is enabled in the guest VM.
>> > @@ -38,3 +39,37 @@ MemEncryptSevSnpPreValidateSystemRam (
>> > //
>> > ASSERT (FALSE);
>> > }
>> > +
>> > +/**
>> > + Accept pages system RAM when SEV-SNP is enabled in the guest VM.
>> > +
>> > + @param[in] BaseAddress Base address
>> > + @param[in] NumPages Number of pages starting from the base address
>> > +
>> > +**/
>> > +VOID
>> > +EFIAPI
>> > +MemEncryptSnpAcceptPages (
>> > + IN PHYSICAL_ADDRESS BaseAddress,
>> > + IN UINTN NumPages
>> > + )
>> > +{
>> > + EFI_STATUS Status;
>> > +
>> > + if (!MemEncryptSevSnpIsEnabled ()) {
>> > + return;
>> > + }
>> > + if (BaseAddress >= SIZE_4GB) {
>> > + Status = InternalMemEncryptSevCreateIdentityMap1G (
>> > + 0,
>> > + BaseAddress,
>> > + EFI_PAGES_TO_SIZE (NumPages)
>> > + );
>> > + if (EFI_ERROR (Status)) {
>> > + ASSERT (FALSE);
>> > + CpuDeadLoop ();
>> > + }
>> > + }
>> > +
>> > + InternalSetPageState (BaseAddress, NumPages, SevSnpPagePrivate, TRUE);
>> > +}
>> > diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiSnpSystemRamValidate.c b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiSnpSystemRamValidate.c
>> > index 4970165444..1c52bfe691 100644
>> > --- a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiSnpSystemRamValidate.c
>> > +++ b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/PeiSnpSystemRamValidate.c
>> > @@ -126,3 +126,20 @@ MemEncryptSevSnpPreValidateSystemRam (
>> > BaseAddress = EndAddress;
>> > }
>> > }
>> > +
>> > +/**
>> > + Accept pages system RAM when SEV-SNP is enabled in the guest VM.
>> > +
>> > + @param[in] BaseAddress Base address
>> > + @param[in] NumPages Number of pages starting from the base address
>> > +
>> > +**/
>> > +VOID
>> > +EFIAPI
>> > +MemEncryptSnpAcceptPages (
>> > + IN PHYSICAL_ADDRESS BaseAddress,
>> > + IN UINTN NumPages
>> > + )
>> > +{
>> > + ASSERT (FALSE);
>> > +}
>> > diff --git a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SecSnpSystemRamValidate.c b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SecSnpSystemRamValidate.c
>> > index 7797febb8a..edfebf6ef4 100644
>> > --- a/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SecSnpSystemRamValidate.c
>> > +++ b/OvmfPkg/Library/BaseMemEncryptSevLib/X64/SecSnpSystemRamValidate.c
>> > @@ -10,6 +10,7 @@
>> >
>> > #include <Uefi/UefiBaseType.h>
>> > #include <Library/BaseLib.h>
>> > +#include <Library/DebugLib.h>
>> > #include <Library/MemEncryptSevLib.h>
>> >
>> > #include "SnpPageStateChange.h"
>> > @@ -80,3 +81,20 @@ MemEncryptSevSnpPreValidateSystemRam (
>> >
>> > InternalSetPageState (BaseAddress, NumPages, SevSnpPagePrivate, TRUE);
>> > }
>> > +
>> > +/**
>> > + Accept pages system RAM when SEV-SNP is enabled in the guest VM.
>> > +
>> > + @param[in] BaseAddress Base address
>> > + @param[in] NumPages Number of pages starting from the base address
>> > +
>> > +**/
>> > +VOID
>> > +EFIAPI
>> > +MemEncryptSnpAcceptPages (
>> > + IN PHYSICAL_ADDRESS BaseAddress,
>> > + IN UINTN NumPages
>> > + )
>> > +{
>> > + ASSERT(FALSE);
>> > +}
>
>
>
> --
> -Dionna Glaze, PhD (she/her)
>
>
>
^ permalink raw reply [flat|nested] 9+ messages in thread
* [PATCH 2/4] DxeMain accepts all memory at EBS if needed
2022-09-23 20:34 [PATCHv2 0/4] Add safe unaccepted memory behavior Dionna Glaze
2022-09-23 20:34 ` [PATCH 1/4] OvmfPkg: Realize EfiMemoryAcceptProtocol in AmdSevDxe Dionna Glaze
@ 2022-09-23 20:34 ` Dionna Glaze
2022-09-23 21:34 ` Lendacky, Thomas
2022-09-23 20:34 ` [PATCHv2 3/4] MdeModulePkg: add EnableUnacceptedMemoryProtocol Dionna Glaze
2022-09-23 20:34 ` [PATCHv2 4/4] OvmfPkg/PlatformPei: SEV-SNP make >=4GB unaccepted Dionna Glaze
3 siblings, 1 reply; 9+ messages in thread
From: Dionna Glaze @ 2022-09-23 20:34 UTC (permalink / raw)
To: devel
Cc: Dionna Glaze, Gerd Hoffmann, James Bottomley, Jiewen Yao,
Tom Lendacky, Ard Biesheuvel
With the addition of the EfiUnacceptedMemory memory type, it is possible
the EFI-enlightened guests do not themselves support the new memory
type. This commit adds a dynamic Pcd that can be set to enable
unaccepted memory support before ExitBootServices is called.
The expected usage is to set the new Pcd with a protocol that is usable
by bootloaders and directly-booted OSes when they can determine that the
OS does indeed support unaccepted memory.
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Dionna Glaze <dionnaglaze@google.com>
---
MdeModulePkg/Core/Dxe/DxeMain.h | 10 +++
MdeModulePkg/Core/Dxe/DxeMain.inf | 2 +
MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c | 14 +++-
MdeModulePkg/Core/Dxe/Mem/Page.c | 87 +++++++++++++++++++++++++
MdeModulePkg/MdeModulePkg.dec | 6 ++
MdeModulePkg/MdeModulePkg.uni | 6 ++
OvmfPkg/AmdSev/AmdSevX64.dsc | 1 +
OvmfPkg/Bhyve/BhyveX64.dsc | 2 +
OvmfPkg/CloudHv/CloudHvX64.dsc | 2 +
OvmfPkg/IntelTdx/IntelTdxX64.dsc | 2 +
OvmfPkg/OvmfPkgIa32X64.dsc | 2 +
OvmfPkg/OvmfPkgX64.dsc | 2 +
OvmfPkg/OvmfXen.dsc | 2 +
13 files changed, 137 insertions(+), 1 deletion(-)
diff --git a/MdeModulePkg/Core/Dxe/DxeMain.h b/MdeModulePkg/Core/Dxe/DxeMain.h
index 815a6b4bd8..ac943c87a3 100644
--- a/MdeModulePkg/Core/Dxe/DxeMain.h
+++ b/MdeModulePkg/Core/Dxe/DxeMain.h
@@ -2698,6 +2698,16 @@ CoreInitializeMemoryProtection (
VOID
);
+/**
+ Accept and convert unaccepted memory to conventional memory if unaccepted
+ memory is not enabled and there is an implementation of MemoryAcceptProtocol
+ installed.
+ **/
+EFI_STATUS
+CoreResolveUnacceptedMemory (
+ VOID
+ );
+
/**
Install MemoryAttributesTable on memory allocation.
diff --git a/MdeModulePkg/Core/Dxe/DxeMain.inf b/MdeModulePkg/Core/Dxe/DxeMain.inf
index e4bca89577..deb8bb2ba8 100644
--- a/MdeModulePkg/Core/Dxe/DxeMain.inf
+++ b/MdeModulePkg/Core/Dxe/DxeMain.inf
@@ -153,6 +153,7 @@
gEfiHiiPackageListProtocolGuid ## SOMETIMES_PRODUCES
gEfiSmmBase2ProtocolGuid ## SOMETIMES_CONSUMES
gEdkiiPeCoffImageEmulatorProtocolGuid ## SOMETIMES_CONSUMES
+ gEfiMemoryAcceptProtocolGuid ## SOMETIMES_CONSUMES
# Arch Protocols
gEfiBdsArchProtocolGuid ## CONSUMES
@@ -186,6 +187,7 @@
gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPropertyMask ## CONSUMES
gEfiMdeModulePkgTokenSpaceGuid.PcdCpuStackGuard ## CONSUMES
gEfiMdeModulePkgTokenSpaceGuid.PcdFwVolDxeMaxEncapsulationDepth ## CONSUMES
+ gEfiMdeModulePkgTokenSpaceGuid.PcdEnableUnacceptedMemory ## CONSUMES
# [Hob]
# RESOURCE_DESCRIPTOR ## CONSUMES
diff --git a/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c b/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c
index 5733f0c8ec..8d1de32fe7 100644
--- a/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c
+++ b/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c
@@ -768,13 +768,25 @@ CoreExitBootServices (
//
gTimer->SetTimerPeriod (gTimer, 0);
+ //
+ // Accept all memory if unaccepted memory isn't enabled.
+ //
+ Status = CoreResolveUnacceptedMemory();
+ if (EFI_ERROR (Status)) {
+ //
+ // Notify other drivers that ExitBootServices failed
+ //
+ CoreNotifySignalList (&gEventExitBootServicesFailedGuid);
+ return Status;
+ }
+
//
// Terminate memory services if the MapKey matches
//
Status = CoreTerminateMemoryMap (MapKey);
if (EFI_ERROR (Status)) {
//
- // Notify other drivers that ExitBootServices fail
+ // Notify other drivers that ExitBootServices failed
//
CoreNotifySignalList (&gEventExitBootServicesFailedGuid);
return Status;
diff --git a/MdeModulePkg/Core/Dxe/Mem/Page.c b/MdeModulePkg/Core/Dxe/Mem/Page.c
index ffe79dcca9..cbebe62a28 100644
--- a/MdeModulePkg/Core/Dxe/Mem/Page.c
+++ b/MdeModulePkg/Core/Dxe/Mem/Page.c
@@ -9,6 +9,8 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
#include "DxeMain.h"
#include "Imem.h"
#include "HeapGuard.h"
+#include <Library/PcdLib.h>
+#include <Protocol/MemoryAccept.h>
//
// Entry for tracking the memory regions for each memory type to coalesce similar memory types
@@ -2118,6 +2120,91 @@ CoreFreePoolPages (
CoreConvertPages (Memory, NumberOfPages, EfiConventionalMemory);
}
+EFI_EVENT gExitBootServiceEvent = NULL;
+
+STATIC
+EFI_STATUS
+AcceptAllUnacceptedMemory (
+ IN EFI_MEMORY_ACCEPT_PROTOCOL *AcceptMemory
+ )
+{
+ EFI_GCD_MEMORY_SPACE_DESCRIPTOR *AllDescMap;
+ UINTN NumEntries;
+ UINTN Index;
+ EFI_STATUS Status;
+
+ /*
+ * Get a copy of the memory space map to iterate over while
+ * changing the map.
+ */
+ Status = CoreGetMemorySpaceMap (&NumEntries, &AllDescMap);
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+ for (Index = 0; Index < NumEntries; Index++) {
+ CONST EFI_GCD_MEMORY_SPACE_DESCRIPTOR *Desc;
+
+ Desc = &AllDescMap[Index];
+ if (Desc->GcdMemoryType != EfiGcdMemoryTypeUnaccepted) {
+ continue;
+ }
+
+ Status = AcceptMemory->AcceptMemory (
+ AcceptMemory,
+ Desc->BaseAddress,
+ Desc->Length
+ );
+ if (EFI_ERROR(Status)) {
+ goto done;
+ }
+
+ Status = CoreRemoveMemorySpace(Desc->BaseAddress, Desc->Length);
+ if (EFI_ERROR(Status)) {
+ goto done;
+ }
+
+ Status = CoreAddMemorySpace (
+ EfiGcdMemoryTypeSystemMemory,
+ Desc->BaseAddress,
+ Desc->Length,
+ EFI_MEMORY_CPU_CRYPTO | EFI_MEMORY_XP | EFI_MEMORY_RO | EFI_MEMORY_RP
+ );
+ if (EFI_ERROR(Status)) {
+ goto done;
+ }
+ }
+
+done:
+ FreePool (AllDescMap);
+ return Status;
+}
+
+EFI_STATUS
+CoreResolveUnacceptedMemory (
+ VOID
+ )
+{
+ EFI_MEMORY_ACCEPT_PROTOCOL *AcceptMemory;
+ EFI_STATUS Status;
+
+ // No need to accept anything. Unaccepted memory is enabled.
+ if (PcdGetBool(PcdEnableUnacceptedMemory)) {
+ return EFI_SUCCESS;
+ }
+
+ Status = gBS->LocateProtocol (&gEfiMemoryAcceptProtocolGuid, NULL,
+ (VOID **)&AcceptMemory);
+ if (Status == EFI_NOT_FOUND) {
+ return EFI_SUCCESS;
+ }
+ if (Status != EFI_SUCCESS) {
+ DEBUG ((DEBUG_ERROR, "Error locating MemoryAcceptProtocol: %d\n", Status));
+ return Status;
+ }
+
+ return AcceptAllUnacceptedMemory(AcceptMemory);
+}
+
/**
Make sure the memory map is following all the construction rules,
it is the last time to check memory map error before exit boot services.
diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index 58e6ab0048..dd07b3725a 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -2102,6 +2102,12 @@
# @Prompt The shared bit mask when Intel Tdx is enabled.
gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0|UINT64|0x10000025
+ ## Indicates if the memory map may include unaccepted memory after ExitBootServices().<BR><BR>
+ # TRUE - The memory map may include unaccepted memory after ExitBootServices().<BR>
+ # FALSE - The memory map may not include unaccepted memory after ExitBootServices().<BR>
+ # @Prompt Support unaccepted memory type.
+ gEfiMdeModulePkgTokenSpaceGuid.PcdEnableUnacceptedMemory|FALSE|BOOLEAN|0x10000026
+
[PcdsPatchableInModule]
## Specify memory size with page number for PEI code when
# Loading Module at Fixed Address feature is enabled.
diff --git a/MdeModulePkg/MdeModulePkg.uni b/MdeModulePkg/MdeModulePkg.uni
index 33ce9f6198..fde57da123 100644
--- a/MdeModulePkg/MdeModulePkg.uni
+++ b/MdeModulePkg/MdeModulePkg.uni
@@ -1338,3 +1338,9 @@
#string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdPcieResizableBarSupport_HELP #language en-US "Indicates if the PCIe Resizable BAR Capability Supported.<BR><BR>\n"
"TRUE - PCIe Resizable BAR Capability is supported.<BR>\n"
"FALSE - PCIe Resizable BAR Capability is not supported.<BR>"
+
+#string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdEnableUnacceptedMemory_PROMPT #language en-US "Support unaccepted memory type"
+#string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdEnableUnacceptedMemory_HELP #language en-US "Indicates if the memory map may include unaccepted memory "
+ "after ExitBootServices().<BR><BR>\n"
+ "TRUE - The memory map may include unaccepted memory after ExitBootServices().<BR>\n"
+ "FALSE - The memory map may not include unaccepted memory after ExitBootServices().<BR>\n"
diff --git a/OvmfPkg/AmdSev/AmdSevX64.dsc b/OvmfPkg/AmdSev/AmdSevX64.dsc
index 90e8a213ef..23086748c5 100644
--- a/OvmfPkg/AmdSev/AmdSevX64.dsc
+++ b/OvmfPkg/AmdSev/AmdSevX64.dsc
@@ -526,6 +526,7 @@
# Set ConfidentialComputing defaults
gEfiMdePkgTokenSpaceGuid.PcdConfidentialComputingGuestAttr|0
+ gEfiMdeModulePkgTokenSpaceGuid.PcdEnableUnacceptedMemory|FALSE
!include OvmfPkg/OvmfTpmPcds.dsc.inc
diff --git a/OvmfPkg/Bhyve/BhyveX64.dsc b/OvmfPkg/Bhyve/BhyveX64.dsc
index 475b88b21a..004be8b019 100644
--- a/OvmfPkg/Bhyve/BhyveX64.dsc
+++ b/OvmfPkg/Bhyve/BhyveX64.dsc
@@ -559,6 +559,8 @@
# Set Tdx shared bit mask
gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0
+ gEfiMdeModulePkgTokenSpaceGuid.PcdEnableUnacceptedMemory|FALSE
+
gEfiSecurityPkgTokenSpaceGuid.PcdOptionRomImageVerificationPolicy|0x00
# MdeModulePkg resolution sets up the system display resolution
diff --git a/OvmfPkg/CloudHv/CloudHvX64.dsc b/OvmfPkg/CloudHv/CloudHvX64.dsc
index 10b16104ac..41f43a2631 100644
--- a/OvmfPkg/CloudHv/CloudHvX64.dsc
+++ b/OvmfPkg/CloudHv/CloudHvX64.dsc
@@ -618,6 +618,8 @@
# Set Tdx shared bit mask
gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0
+ gEfiMdeModulePkgTokenSpaceGuid.PcdEnableUnacceptedMemory|FALSE
+
# Set SEV-ES defaults
gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbBase|0
gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbSize|0
diff --git a/OvmfPkg/IntelTdx/IntelTdxX64.dsc b/OvmfPkg/IntelTdx/IntelTdxX64.dsc
index c0c1a15b09..55b6a2a845 100644
--- a/OvmfPkg/IntelTdx/IntelTdxX64.dsc
+++ b/OvmfPkg/IntelTdx/IntelTdxX64.dsc
@@ -514,6 +514,8 @@
# Set Tdx shared bit mask
gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0
+ gEfiMdeModulePkgTokenSpaceGuid.PcdEnableUnacceptedMemory|FALSE
+
# Set SEV-ES defaults
gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbBase|0
gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbSize|0
diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc
index af566b953f..aebe1c3192 100644
--- a/OvmfPkg/OvmfPkgIa32X64.dsc
+++ b/OvmfPkg/OvmfPkgIa32X64.dsc
@@ -655,6 +655,8 @@
gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrMask|0x0
gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0
+ gEfiMdeModulePkgTokenSpaceGuid.PcdEnableUnacceptedMemory|FALSE
+
# Set SEV-ES defaults
gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbBase|0
gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbSize|0
diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc
index f39d9cd117..6e4418388e 100644
--- a/OvmfPkg/OvmfPkgX64.dsc
+++ b/OvmfPkg/OvmfPkgX64.dsc
@@ -679,6 +679,8 @@
# Set Tdx shared bit mask
gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0
+ gEfiMdeModulePkgTokenSpaceGuid.PcdEnableUnacceptedMemory|FALSE
+
# Set SEV-ES defaults
gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbBase|0
gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbSize|0
diff --git a/OvmfPkg/OvmfXen.dsc b/OvmfPkg/OvmfXen.dsc
index 58a7c97cdd..0f57e22a2b 100644
--- a/OvmfPkg/OvmfXen.dsc
+++ b/OvmfPkg/OvmfXen.dsc
@@ -505,6 +505,8 @@
# Set Tdx shared bit mask
gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0
+ gEfiMdeModulePkgTokenSpaceGuid.PcdEnableUnacceptedMemory|FALSE
+
gEfiSecurityPkgTokenSpaceGuid.PcdOptionRomImageVerificationPolicy|0x00
################################################################################
--
2.37.3.998.g577e59143f-goog
^ permalink raw reply related [flat|nested] 9+ messages in thread* Re: [PATCH 2/4] DxeMain accepts all memory at EBS if needed
2022-09-23 20:34 ` [PATCH 2/4] DxeMain accepts all memory at EBS if needed Dionna Glaze
@ 2022-09-23 21:34 ` Lendacky, Thomas
0 siblings, 0 replies; 9+ messages in thread
From: Lendacky, Thomas @ 2022-09-23 21:34 UTC (permalink / raw)
To: Dionna Glaze, devel
Cc: Gerd Hoffmann, James Bottomley, Jiewen Yao, Ard Biesheuvel
On 9/23/22 15:34, Dionna Glaze wrote:
> With the addition of the EfiUnacceptedMemory memory type, it is possible
> the EFI-enlightened guests do not themselves support the new memory
> type. This commit adds a dynamic Pcd that can be set to enable
> unaccepted memory support before ExitBootServices is called.
>
> The expected usage is to set the new Pcd with a protocol that is usable
> by bootloaders and directly-booted OSes when they can determine that the
> OS does indeed support unaccepted memory.
>
> Cc: Gerd Hoffmann <kraxel@redhat.com>
> Cc: James Bottomley <jejb@linux.ibm.com>
> Cc: Jiewen Yao <jiewen.yao@intel.com>
> Cc: Tom Lendacky <thomas.lendacky@amd.com>
> Cc: Ard Biesheuvel <ardb@kernel.org>
>
> Signed-off-by: Dionna Glaze <dionnaglaze@google.com>
> ---
> MdeModulePkg/Core/Dxe/DxeMain.h | 10 +++
> MdeModulePkg/Core/Dxe/DxeMain.inf | 2 +
> MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c | 14 +++-
> MdeModulePkg/Core/Dxe/Mem/Page.c | 87 +++++++++++++++++++++++++
> MdeModulePkg/MdeModulePkg.dec | 6 ++
> MdeModulePkg/MdeModulePkg.uni | 6 ++
> OvmfPkg/AmdSev/AmdSevX64.dsc | 1 +
> OvmfPkg/Bhyve/BhyveX64.dsc | 2 +
> OvmfPkg/CloudHv/CloudHvX64.dsc | 2 +
> OvmfPkg/IntelTdx/IntelTdxX64.dsc | 2 +
> OvmfPkg/OvmfPkgIa32X64.dsc | 2 +
> OvmfPkg/OvmfPkgX64.dsc | 2 +
> OvmfPkg/OvmfXen.dsc | 2 +
> 13 files changed, 137 insertions(+), 1 deletion(-)
You'll need to split this patch into the MdeModulePkg changes and then the
OvmfPkg changes. That will allow you to have the proper prefix on the
subject line, too (sorry I didn't notice that last time).
Thanks,
Tom
>
> diff --git a/MdeModulePkg/Core/Dxe/DxeMain.h b/MdeModulePkg/Core/Dxe/DxeMain.h
> index 815a6b4bd8..ac943c87a3 100644
> --- a/MdeModulePkg/Core/Dxe/DxeMain.h
> +++ b/MdeModulePkg/Core/Dxe/DxeMain.h
> @@ -2698,6 +2698,16 @@ CoreInitializeMemoryProtection (
> VOID
> );
>
> +/**
> + Accept and convert unaccepted memory to conventional memory if unaccepted
> + memory is not enabled and there is an implementation of MemoryAcceptProtocol
> + installed.
> + **/
> +EFI_STATUS
> +CoreResolveUnacceptedMemory (
> + VOID
> + );
> +
> /**
> Install MemoryAttributesTable on memory allocation.
>
> diff --git a/MdeModulePkg/Core/Dxe/DxeMain.inf b/MdeModulePkg/Core/Dxe/DxeMain.inf
> index e4bca89577..deb8bb2ba8 100644
> --- a/MdeModulePkg/Core/Dxe/DxeMain.inf
> +++ b/MdeModulePkg/Core/Dxe/DxeMain.inf
> @@ -153,6 +153,7 @@
> gEfiHiiPackageListProtocolGuid ## SOMETIMES_PRODUCES
> gEfiSmmBase2ProtocolGuid ## SOMETIMES_CONSUMES
> gEdkiiPeCoffImageEmulatorProtocolGuid ## SOMETIMES_CONSUMES
> + gEfiMemoryAcceptProtocolGuid ## SOMETIMES_CONSUMES
>
> # Arch Protocols
> gEfiBdsArchProtocolGuid ## CONSUMES
> @@ -186,6 +187,7 @@
> gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPropertyMask ## CONSUMES
> gEfiMdeModulePkgTokenSpaceGuid.PcdCpuStackGuard ## CONSUMES
> gEfiMdeModulePkgTokenSpaceGuid.PcdFwVolDxeMaxEncapsulationDepth ## CONSUMES
> + gEfiMdeModulePkgTokenSpaceGuid.PcdEnableUnacceptedMemory ## CONSUMES
>
> # [Hob]
> # RESOURCE_DESCRIPTOR ## CONSUMES
> diff --git a/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c b/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c
> index 5733f0c8ec..8d1de32fe7 100644
> --- a/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c
> +++ b/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c
> @@ -768,13 +768,25 @@ CoreExitBootServices (
> //
> gTimer->SetTimerPeriod (gTimer, 0);
>
> + //
> + // Accept all memory if unaccepted memory isn't enabled.
> + //
> + Status = CoreResolveUnacceptedMemory();
> + if (EFI_ERROR (Status)) {
> + //
> + // Notify other drivers that ExitBootServices failed
> + //
> + CoreNotifySignalList (&gEventExitBootServicesFailedGuid);
> + return Status;
> + }
> +
> //
> // Terminate memory services if the MapKey matches
> //
> Status = CoreTerminateMemoryMap (MapKey);
> if (EFI_ERROR (Status)) {
> //
> - // Notify other drivers that ExitBootServices fail
> + // Notify other drivers that ExitBootServices failed
> //
> CoreNotifySignalList (&gEventExitBootServicesFailedGuid);
> return Status;
> diff --git a/MdeModulePkg/Core/Dxe/Mem/Page.c b/MdeModulePkg/Core/Dxe/Mem/Page.c
> index ffe79dcca9..cbebe62a28 100644
> --- a/MdeModulePkg/Core/Dxe/Mem/Page.c
> +++ b/MdeModulePkg/Core/Dxe/Mem/Page.c
> @@ -9,6 +9,8 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
> #include "DxeMain.h"
> #include "Imem.h"
> #include "HeapGuard.h"
> +#include <Library/PcdLib.h>
> +#include <Protocol/MemoryAccept.h>
>
> //
> // Entry for tracking the memory regions for each memory type to coalesce similar memory types
> @@ -2118,6 +2120,91 @@ CoreFreePoolPages (
> CoreConvertPages (Memory, NumberOfPages, EfiConventionalMemory);
> }
>
> +EFI_EVENT gExitBootServiceEvent = NULL;
> +
> +STATIC
> +EFI_STATUS
> +AcceptAllUnacceptedMemory (
> + IN EFI_MEMORY_ACCEPT_PROTOCOL *AcceptMemory
> + )
> +{
> + EFI_GCD_MEMORY_SPACE_DESCRIPTOR *AllDescMap;
> + UINTN NumEntries;
> + UINTN Index;
> + EFI_STATUS Status;
> +
> + /*
> + * Get a copy of the memory space map to iterate over while
> + * changing the map.
> + */
> + Status = CoreGetMemorySpaceMap (&NumEntries, &AllDescMap);
> + if (EFI_ERROR (Status)) {
> + return Status;
> + }
> + for (Index = 0; Index < NumEntries; Index++) {
> + CONST EFI_GCD_MEMORY_SPACE_DESCRIPTOR *Desc;
> +
> + Desc = &AllDescMap[Index];
> + if (Desc->GcdMemoryType != EfiGcdMemoryTypeUnaccepted) {
> + continue;
> + }
> +
> + Status = AcceptMemory->AcceptMemory (
> + AcceptMemory,
> + Desc->BaseAddress,
> + Desc->Length
> + );
> + if (EFI_ERROR(Status)) {
> + goto done;
> + }
> +
> + Status = CoreRemoveMemorySpace(Desc->BaseAddress, Desc->Length);
> + if (EFI_ERROR(Status)) {
> + goto done;
> + }
> +
> + Status = CoreAddMemorySpace (
> + EfiGcdMemoryTypeSystemMemory,
> + Desc->BaseAddress,
> + Desc->Length,
> + EFI_MEMORY_CPU_CRYPTO | EFI_MEMORY_XP | EFI_MEMORY_RO | EFI_MEMORY_RP
> + );
> + if (EFI_ERROR(Status)) {
> + goto done;
> + }
> + }
> +
> +done:
> + FreePool (AllDescMap);
> + return Status;
> +}
> +
> +EFI_STATUS
> +CoreResolveUnacceptedMemory (
> + VOID
> + )
> +{
> + EFI_MEMORY_ACCEPT_PROTOCOL *AcceptMemory;
> + EFI_STATUS Status;
> +
> + // No need to accept anything. Unaccepted memory is enabled.
> + if (PcdGetBool(PcdEnableUnacceptedMemory)) {
> + return EFI_SUCCESS;
> + }
> +
> + Status = gBS->LocateProtocol (&gEfiMemoryAcceptProtocolGuid, NULL,
> + (VOID **)&AcceptMemory);
> + if (Status == EFI_NOT_FOUND) {
> + return EFI_SUCCESS;
> + }
> + if (Status != EFI_SUCCESS) {
> + DEBUG ((DEBUG_ERROR, "Error locating MemoryAcceptProtocol: %d\n", Status));
> + return Status;
> + }
> +
> + return AcceptAllUnacceptedMemory(AcceptMemory);
> +}
> +
> /**
> Make sure the memory map is following all the construction rules,
> it is the last time to check memory map error before exit boot services.
> diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
> index 58e6ab0048..dd07b3725a 100644
> --- a/MdeModulePkg/MdeModulePkg.dec
> +++ b/MdeModulePkg/MdeModulePkg.dec
> @@ -2102,6 +2102,12 @@
> # @Prompt The shared bit mask when Intel Tdx is enabled.
> gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0|UINT64|0x10000025
>
> + ## Indicates if the memory map may include unaccepted memory after ExitBootServices().<BR><BR>
> + # TRUE - The memory map may include unaccepted memory after ExitBootServices().<BR>
> + # FALSE - The memory map may not include unaccepted memory after ExitBootServices().<BR>
> + # @Prompt Support unaccepted memory type.
> + gEfiMdeModulePkgTokenSpaceGuid.PcdEnableUnacceptedMemory|FALSE|BOOLEAN|0x10000026
> +
> [PcdsPatchableInModule]
> ## Specify memory size with page number for PEI code when
> # Loading Module at Fixed Address feature is enabled.
> diff --git a/MdeModulePkg/MdeModulePkg.uni b/MdeModulePkg/MdeModulePkg.uni
> index 33ce9f6198..fde57da123 100644
> --- a/MdeModulePkg/MdeModulePkg.uni
> +++ b/MdeModulePkg/MdeModulePkg.uni
> @@ -1338,3 +1338,9 @@
> #string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdPcieResizableBarSupport_HELP #language en-US "Indicates if the PCIe Resizable BAR Capability Supported.<BR><BR>\n"
> "TRUE - PCIe Resizable BAR Capability is supported.<BR>\n"
> "FALSE - PCIe Resizable BAR Capability is not supported.<BR>"
> +
> +#string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdEnableUnacceptedMemory_PROMPT #language en-US "Support unaccepted memory type"
> +#string STR_gEfiMdeModulePkgTokenSpaceGuid_PcdEnableUnacceptedMemory_HELP #language en-US "Indicates if the memory map may include unaccepted memory "
> + "after ExitBootServices().<BR><BR>\n"
> + "TRUE - The memory map may include unaccepted memory after ExitBootServices().<BR>\n"
> + "FALSE - The memory map may not include unaccepted memory after ExitBootServices().<BR>\n"
> diff --git a/OvmfPkg/AmdSev/AmdSevX64.dsc b/OvmfPkg/AmdSev/AmdSevX64.dsc
> index 90e8a213ef..23086748c5 100644
> --- a/OvmfPkg/AmdSev/AmdSevX64.dsc
> +++ b/OvmfPkg/AmdSev/AmdSevX64.dsc
> @@ -526,6 +526,7 @@
>
> # Set ConfidentialComputing defaults
> gEfiMdePkgTokenSpaceGuid.PcdConfidentialComputingGuestAttr|0
> + gEfiMdeModulePkgTokenSpaceGuid.PcdEnableUnacceptedMemory|FALSE
>
> !include OvmfPkg/OvmfTpmPcds.dsc.inc
>
> diff --git a/OvmfPkg/Bhyve/BhyveX64.dsc b/OvmfPkg/Bhyve/BhyveX64.dsc
> index 475b88b21a..004be8b019 100644
> --- a/OvmfPkg/Bhyve/BhyveX64.dsc
> +++ b/OvmfPkg/Bhyve/BhyveX64.dsc
> @@ -559,6 +559,8 @@
> # Set Tdx shared bit mask
> gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0
>
> + gEfiMdeModulePkgTokenSpaceGuid.PcdEnableUnacceptedMemory|FALSE
> +
> gEfiSecurityPkgTokenSpaceGuid.PcdOptionRomImageVerificationPolicy|0x00
>
> # MdeModulePkg resolution sets up the system display resolution
> diff --git a/OvmfPkg/CloudHv/CloudHvX64.dsc b/OvmfPkg/CloudHv/CloudHvX64.dsc
> index 10b16104ac..41f43a2631 100644
> --- a/OvmfPkg/CloudHv/CloudHvX64.dsc
> +++ b/OvmfPkg/CloudHv/CloudHvX64.dsc
> @@ -618,6 +618,8 @@
> # Set Tdx shared bit mask
> gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0
>
> + gEfiMdeModulePkgTokenSpaceGuid.PcdEnableUnacceptedMemory|FALSE
> +
> # Set SEV-ES defaults
> gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbBase|0
> gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbSize|0
> diff --git a/OvmfPkg/IntelTdx/IntelTdxX64.dsc b/OvmfPkg/IntelTdx/IntelTdxX64.dsc
> index c0c1a15b09..55b6a2a845 100644
> --- a/OvmfPkg/IntelTdx/IntelTdxX64.dsc
> +++ b/OvmfPkg/IntelTdx/IntelTdxX64.dsc
> @@ -514,6 +514,8 @@
> # Set Tdx shared bit mask
> gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0
>
> + gEfiMdeModulePkgTokenSpaceGuid.PcdEnableUnacceptedMemory|FALSE
> +
> # Set SEV-ES defaults
> gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbBase|0
> gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbSize|0
> diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc
> index af566b953f..aebe1c3192 100644
> --- a/OvmfPkg/OvmfPkgIa32X64.dsc
> +++ b/OvmfPkg/OvmfPkgIa32X64.dsc
> @@ -655,6 +655,8 @@
> gEfiMdeModulePkgTokenSpaceGuid.PcdPteMemoryEncryptionAddressOrMask|0x0
> gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0
>
> + gEfiMdeModulePkgTokenSpaceGuid.PcdEnableUnacceptedMemory|FALSE
> +
> # Set SEV-ES defaults
> gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbBase|0
> gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbSize|0
> diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc
> index f39d9cd117..6e4418388e 100644
> --- a/OvmfPkg/OvmfPkgX64.dsc
> +++ b/OvmfPkg/OvmfPkgX64.dsc
> @@ -679,6 +679,8 @@
> # Set Tdx shared bit mask
> gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0
>
> + gEfiMdeModulePkgTokenSpaceGuid.PcdEnableUnacceptedMemory|FALSE
> +
> # Set SEV-ES defaults
> gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbBase|0
> gEfiMdeModulePkgTokenSpaceGuid.PcdGhcbSize|0
> diff --git a/OvmfPkg/OvmfXen.dsc b/OvmfPkg/OvmfXen.dsc
> index 58a7c97cdd..0f57e22a2b 100644
> --- a/OvmfPkg/OvmfXen.dsc
> +++ b/OvmfPkg/OvmfXen.dsc
> @@ -505,6 +505,8 @@
> # Set Tdx shared bit mask
> gEfiMdeModulePkgTokenSpaceGuid.PcdTdxSharedBitMask|0x0
>
> + gEfiMdeModulePkgTokenSpaceGuid.PcdEnableUnacceptedMemory|FALSE
> +
> gEfiSecurityPkgTokenSpaceGuid.PcdOptionRomImageVerificationPolicy|0x00
>
> ################################################################################
^ permalink raw reply [flat|nested] 9+ messages in thread
* [PATCHv2 3/4] MdeModulePkg: add EnableUnacceptedMemoryProtocol
2022-09-23 20:34 [PATCHv2 0/4] Add safe unaccepted memory behavior Dionna Glaze
2022-09-23 20:34 ` [PATCH 1/4] OvmfPkg: Realize EfiMemoryAcceptProtocol in AmdSevDxe Dionna Glaze
2022-09-23 20:34 ` [PATCH 2/4] DxeMain accepts all memory at EBS if needed Dionna Glaze
@ 2022-09-23 20:34 ` Dionna Glaze
2022-09-23 20:34 ` [PATCHv2 4/4] OvmfPkg/PlatformPei: SEV-SNP make >=4GB unaccepted Dionna Glaze
3 siblings, 0 replies; 9+ messages in thread
From: Dionna Glaze @ 2022-09-23 20:34 UTC (permalink / raw)
To: devel
Cc: Dionna Glaze, Gerd Hoffmann, James Bottomley, Jiewen Yao,
Tom Lendacky, Ard Biesheuvel
Add a simple protocol that enables the use of the unaccepted memory
type. Must be called before ExitBootServices to be effective.
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Dionna Glaze <dionnaglaze@google.com>
---
MdeModulePkg/Core/Dxe/DxeMain.h | 22 ++++++++++++++++
MdeModulePkg/Core/Dxe/DxeMain.inf | 3 ++-
MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c | 5 ++++
MdeModulePkg/Core/Dxe/Mem/Page.c | 35 +++++++++++++++++++++++++
MdeModulePkg/MdeModulePkg.dec | 3 +++
5 files changed, 67 insertions(+), 1 deletion(-)
diff --git a/MdeModulePkg/Core/Dxe/DxeMain.h b/MdeModulePkg/Core/Dxe/DxeMain.h
index ac943c87a3..5f0114b04f 100644
--- a/MdeModulePkg/Core/Dxe/DxeMain.h
+++ b/MdeModulePkg/Core/Dxe/DxeMain.h
@@ -2708,6 +2708,28 @@ CoreResolveUnacceptedMemory (
VOID
);
+
+typedef struct _ENABLE_UNACCEPTED_MEMORY_PROTOCOL
+ ENABLE_UNACCEPTED_MEMORY_PROTOCOL;
+
+typedef EFI_STATUS (EFIAPI *ENABLE_UNACCEPTED_MEMORY)(
+ IN ENABLE_UNACCEPTED_MEMORY_PROTOCOL *
+ );
+
+struct _ENABLE_UNACCEPTED_MEMORY_PROTOCOL {
+ ENABLE_UNACCEPTED_MEMORY Enable;
+};
+
+extern EFI_GUID gEnableUnacceptedMemoryProtocolGuid;
+
+/**
+ Implement the protocol for enabling unaccepted memory.
+ **/
+VOID
+InstallEnableUnacceptedMemoryProtocol (
+ VOID
+ );
+
/**
Install MemoryAttributesTable on memory allocation.
diff --git a/MdeModulePkg/Core/Dxe/DxeMain.inf b/MdeModulePkg/Core/Dxe/DxeMain.inf
index deb8bb2ba8..39dcac98bb 100644
--- a/MdeModulePkg/Core/Dxe/DxeMain.inf
+++ b/MdeModulePkg/Core/Dxe/DxeMain.inf
@@ -122,6 +122,7 @@
gEfiMemoryAttributesTableGuid ## SOMETIMES_PRODUCES ## SystemTable
gEfiEndOfDxeEventGroupGuid ## SOMETIMES_CONSUMES ## Event
gEfiHobMemoryAllocStackGuid ## SOMETIMES_CONSUMES ## SystemTable
+ gEnableUnacceptedMemoryProtocolGuid ## PRODUCES ## GUID # Install protocol
[Ppis]
gEfiVectorHandoffInfoPpiGuid ## UNDEFINED # HOB
@@ -187,7 +188,7 @@
gEfiMdeModulePkgTokenSpaceGuid.PcdHeapGuardPropertyMask ## CONSUMES
gEfiMdeModulePkgTokenSpaceGuid.PcdCpuStackGuard ## CONSUMES
gEfiMdeModulePkgTokenSpaceGuid.PcdFwVolDxeMaxEncapsulationDepth ## CONSUMES
- gEfiMdeModulePkgTokenSpaceGuid.PcdEnableUnacceptedMemory ## CONSUMES
+ gEfiMdeModulePkgTokenSpaceGuid.PcdEnableUnacceptedMemory ## CONSUMES ## SOMETIMES_PRODUCES
# [Hob]
# RESOURCE_DESCRIPTOR ## CONSUMES
diff --git a/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c b/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c
index 8d1de32fe7..bc1a8ab6b2 100644
--- a/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c
+++ b/MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c
@@ -354,6 +354,11 @@ DxeMain (
Status = CoreInstallConfigurationTable (&gEfiMemoryTypeInformationGuid, &gMemoryTypeInformation);
ASSERT_EFI_ERROR (Status);
+ //
+ // Install unaccepted memory configuration protocol
+ //
+ InstallEnableUnacceptedMemoryProtocol();
+
//
// If Loading modules At fixed address feature is enabled, install Load moduels at fixed address
// Configuration Table so that user could easily to retrieve the top address to load Dxe and PEI
diff --git a/MdeModulePkg/Core/Dxe/Mem/Page.c b/MdeModulePkg/Core/Dxe/Mem/Page.c
index cbebe62a28..10e152d80d 100644
--- a/MdeModulePkg/Core/Dxe/Mem/Page.c
+++ b/MdeModulePkg/Core/Dxe/Mem/Page.c
@@ -96,6 +96,14 @@ EFI_MEMORY_TYPE_INFORMATION gMemoryTypeInformation[EfiMaxMemoryType + 1] = {
//
GLOBAL_REMOVE_IF_UNREFERENCED BOOLEAN gLoadFixedAddressCodeMemoryReady = FALSE;
+EFI_STATUS EFIAPI CoreEnableUnacceptedMemory(IN ENABLE_UNACCEPTED_MEMORY_PROTOCOL *);
+
+struct {
+ ENABLE_UNACCEPTED_MEMORY enable;
+} mEnableUnacceptedMemoryProtocol = {
+ CoreEnableUnacceptedMemory,
+};
+
/**
Enter critical section by gaining lock on gMemoryLock.
@@ -2205,6 +2213,33 @@ CoreResolveUnacceptedMemory (
return AcceptAllUnacceptedMemory(AcceptMemory);
}
+EFI_STATUS
+EFIAPI
+CoreEnableUnacceptedMemory (
+ IN ENABLE_UNACCEPTED_MEMORY_PROTOCOL *This
+ )
+{
+ return PcdSetBoolS(PcdEnableUnacceptedMemory, TRUE);
+}
+
+VOID
+InstallEnableUnacceptedMemoryProtocol (
+ VOID
+ )
+{
+ EFI_HANDLE Handle;
+ EFI_STATUS Status;
+
+ Handle = NULL;
+ Status = CoreInstallMultipleProtocolInterfaces (
+ &Handle,
+ &gEnableUnacceptedMemoryProtocolGuid,
+ &mEnableUnacceptedMemoryProtocol,
+ NULL
+ );
+ ASSERT_EFI_ERROR (Status);
+}
+
/**
Make sure the memory map is following all the construction rules,
it is the last time to check memory map error before exit boot services.
diff --git a/MdeModulePkg/MdeModulePkg.dec b/MdeModulePkg/MdeModulePkg.dec
index dd07b3725a..ce72c06a93 100644
--- a/MdeModulePkg/MdeModulePkg.dec
+++ b/MdeModulePkg/MdeModulePkg.dec
@@ -244,6 +244,9 @@
gEdkiiPerformanceMeasurementProtocolGuid = { 0xc85d06be, 0x5f75, 0x48ce, { 0xa8, 0x0f, 0x12, 0x36, 0xba, 0x3b, 0x87, 0xb1 } }
gEdkiiSmmPerformanceMeasurementProtocolGuid = { 0xd56b6d73, 0x1a7b, 0x4015, { 0x9b, 0xb4, 0x7b, 0x07, 0x17, 0x29, 0xed, 0x24 } }
+ ## Bootloader protocol Guid for enabling unaccepted memory support.
+ gEnableUnacceptedMemoryProtocolGuid = { 0xc5a010fe, 0x38a7, 0x4531, { 0x8a, 0x4a, 0x05, 0x00, 0xd2, 0xfd, 0x16, 0x49 } }
+
## Guid is defined for CRC32 encapsulation scheme.
# Include/Guid/Crc32GuidedSectionExtraction.h
gEfiCrc32GuidedSectionExtractionGuid = { 0xFC1BCDB0, 0x7D31, 0x49aa, {0x93, 0x6A, 0xA4, 0x60, 0x0D, 0x9D, 0xD0, 0x83 } }
--
2.37.3.998.g577e59143f-goog
^ permalink raw reply related [flat|nested] 9+ messages in thread* [PATCHv2 4/4] OvmfPkg/PlatformPei: SEV-SNP make >=4GB unaccepted
2022-09-23 20:34 [PATCHv2 0/4] Add safe unaccepted memory behavior Dionna Glaze
` (2 preceding siblings ...)
2022-09-23 20:34 ` [PATCHv2 3/4] MdeModulePkg: add EnableUnacceptedMemoryProtocol Dionna Glaze
@ 2022-09-23 20:34 ` Dionna Glaze
3 siblings, 0 replies; 9+ messages in thread
From: Dionna Glaze @ 2022-09-23 20:34 UTC (permalink / raw)
To: devel
Cc: Dionna Glaze, Ard Biescheuvel, Min M. Xu, Gerd Hoffmann,
James Bottomley, Tom Lendacky, Jiewen Yao, Erdem Aktas
Instead of eagerly accepting all memory in PEI, only accept memory under
the 4GB address. This allows a loaded image to use the
ENABLE_UNACCEPTED_MEMORY_PROTOCOL to indicate that it can interpret the
memory type accordingly.
This classification is safe since ExitBootServices will accept and
reclassify the memory as conventional if the enable protocol is not
used.
Cc: Ard Biescheuvel <ardb@kernel.org>
Cc: "Min M. Xu" <min.m.xu@intel.org>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: Tom Lendacky <Thomas.Lendacky@amd.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Erdem Aktas <erdemaktas@google.com>
Signed-off-by: Dionna Glaze <dionnaglaze@google.com>
---
OvmfPkg/PlatformPei/AmdSev.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/OvmfPkg/PlatformPei/AmdSev.c b/OvmfPkg/PlatformPei/AmdSev.c
index 385562b44c..912d6996ae 100644
--- a/OvmfPkg/PlatformPei/AmdSev.c
+++ b/OvmfPkg/PlatformPei/AmdSev.c
@@ -63,6 +63,10 @@ AmdSevSnpInitialize (
for (Hob.Raw = GetHobList (); !END_OF_HOB_LIST (Hob); Hob.Raw = GET_NEXT_HOB (Hob)) {
if ((Hob.Raw != NULL) && (GET_HOB_TYPE (Hob) == EFI_HOB_TYPE_RESOURCE_DESCRIPTOR)) {
ResourceHob = Hob.ResourceDescriptor;
+ if (ResourceHob->PhysicalStart >= SIZE_4GB) {
+ ResourceHob->ResourceType = EFI_RESOURCE_MEMORY_UNACCEPTED;
+ continue;
+ }
if (ResourceHob->ResourceType == EFI_RESOURCE_SYSTEM_MEMORY) {
MemEncryptSevSnpPreValidateSystemRam (
--
2.37.3.998.g577e59143f-goog
^ permalink raw reply related [flat|nested] 9+ messages in thread