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author | Jian J Wang <jian.j.wang@intel.com> | 2017-11-14 10:56:14 +0800 |
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committer | Star Zeng <star.zeng@intel.com> | 2017-11-17 11:03:18 +0800 |
commit | af4f4b3468aa239c61418ff899bfd239eae57b2d (patch) | |
tree | 72f4ce0bc9ec00fbd851a1efc5e7f8cad181f567 /UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c | |
parent | 235a4490c8ce8b6dbac49e6ae3559cb73d6bf620 (diff) | |
download | edk2-af4f4b3468aa239c61418ff899bfd239eae57b2d.tar.gz edk2-af4f4b3468aa239c61418ff899bfd239eae57b2d.tar.bz2 edk2-af4f4b3468aa239c61418ff899bfd239eae57b2d.zip |
UefiCpuPkg/PiSmmCpuDxeSmm: Add SmmMemoryAttribute protocol
Heap guard makes use of paging mechanism to implement its functionality. But
there's no protocol or library available to change page attribute in SMM mode.
A new protocol gEdkiiSmmMemoryAttributeProtocolGuid is introduced to make it
happen. This protocol provide three interfaces
struct _EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL {
EDKII_SMM_GET_MEMORY_ATTRIBUTES GetMemoryAttributes;
EDKII_SMM_SET_MEMORY_ATTRIBUTES SetMemoryAttributes;
EDKII_SMM_CLEAR_MEMORY_ATTRIBUTES ClearMemoryAttributes;
};
Since heap guard feature need to update page attributes. The page table
should not set to be read-only if heap guard feature is enabled for SMM
mode. Otherwise this feature cannot work.
Cc: Eric Dong <eric.dong@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Suggested-by: Ayellet Wolman <ayellet.wolman@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jian J Wang <jian.j.wang@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
Diffstat (limited to 'UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c')
-rwxr-xr-x | UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c index 282d2e6981..6c6d742c95 100755 --- a/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c +++ b/UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.c @@ -76,6 +76,15 @@ EFI_SMM_CPU_PROTOCOL mSmmCpu = { SmmWriteSaveState
};
+/// +/// SMM Memory Attribute Protocol instance +/// +EDKII_SMM_MEMORY_ATTRIBUTE_PROTOCOL mSmmMemoryAttribute = { + EdkiiSmmGetMemoryAttributes, + EdkiiSmmSetMemoryAttributes, + EdkiiSmmClearMemoryAttributes +}; + EFI_CPU_INTERRUPT_HANDLER mExternalVectorTable[EXCEPTION_VECTOR_NUMBER];
//
@@ -893,6 +902,17 @@ PiCpuSmmEntry ( );
ASSERT_EFI_ERROR (Status);
+ // + // Install the SMM Memory Attribute Protocol into SMM protocol database + // + Status = gSmst->SmmInstallProtocolInterface ( + &mSmmCpuHandle, + &gEdkiiSmmMemoryAttributeProtocolGuid, + EFI_NATIVE_INTERFACE, + &mSmmMemoryAttribute + ); + ASSERT_EFI_ERROR (Status); + //
// Expose address of CPU Hot Plug Data structure if CPU hot plug is supported.
//
|