diff options
| author | Jiaxin Wu <jiaxin.wu@intel.com> | 2024-06-26 13:41:45 +0800 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2024-08-28 15:25:27 +0000 |
| commit | 167e902624c9ccdf28920c099ee2d5e74d9c85a3 (patch) | |
| tree | 9dd48bf10783b1e4cac9cd02bc7623c477a4edfb /UefiCpuPkg | |
| parent | 9ee533479651d29a254a184a56d01809353f0bcc (diff) | |
| download | edk2-167e902624c9ccdf28920c099ee2d5e74d9c85a3.tar.gz | |
UefiCpuPkg/PiSmmCpuDxeSmm: Impl IsSmmCommBufferForbiddenAddress for MM
Since all accessible NON-MMRAM memory shall be in ResourceDescriptor
HOBs, check the ResourceDescriptor HOBs to return if the Address is
forbidden or not for MM CPU.
Signed-off-by: Jiaxin Wu <jiaxin.wu@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Dun Tan <dun.tan@intel.com>
Cc: Hongbin1 Zhang <hongbin1.zhang@intel.com>
Cc: Wei6 Xu <wei6.xu@intel.com>
Cc: Yuanhao Xie <yuanhao.xie@intel.com>
Diffstat (limited to 'UefiCpuPkg')
| -rw-r--r-- | UefiCpuPkg/PiSmmCpuDxeSmm/NonMmramMapStandaloneMm.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/UefiCpuPkg/PiSmmCpuDxeSmm/NonMmramMapStandaloneMm.c b/UefiCpuPkg/PiSmmCpuDxeSmm/NonMmramMapStandaloneMm.c index 3c86c6b28a..3ae074c63d 100644 --- a/UefiCpuPkg/PiSmmCpuDxeSmm/NonMmramMapStandaloneMm.c +++ b/UefiCpuPkg/PiSmmCpuDxeSmm/NonMmramMapStandaloneMm.c @@ -47,6 +47,34 @@ GetSmmProfileData ( }
/**
+ Return if the Address is forbidden as SMM communication buffer.
+
+ @param[in] Address the address to be checked
+
+ @return TRUE The address is forbidden as SMM communication buffer.
+ @return FALSE The address is allowed as SMM communication buffer.
+**/
+BOOLEAN
+IsSmmCommBufferForbiddenAddress (
+ IN UINT64 Address
+ )
+{
+ EFI_PEI_HOB_POINTERS Hob;
+
+ Hob.Raw = GetFirstHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR);
+ while (Hob.Raw != NULL) {
+ if ((Address >= Hob.ResourceDescriptor->PhysicalStart) && (Address < Hob.ResourceDescriptor->PhysicalStart + Hob.ResourceDescriptor->ResourceLength)) {
+ return FALSE;
+ }
+
+ Hob.Raw = GET_NEXT_HOB (Hob);
+ Hob.Raw = GetNextHob (EFI_HOB_TYPE_RESOURCE_DESCRIPTOR, Hob.Raw);
+ }
+
+ return TRUE;
+}
+
+/**
Build Memory Region from ResourceDescriptor HOBs by excluding Logging attribute range.
@param[out] MemoryRegion Returned Non-Mmram Memory regions.
|