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| author | Gerd Hoffmann <kraxel@redhat.com> | 2023-05-17 12:24:47 +0200 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2023-05-29 11:19:51 +0000 |
| commit | d4d24001f78bcee965d8854fba6f08f48b4ec446 (patch) | |
| tree | c7385148f90adce5533157fcd38772f94a9105a9 | |
| parent | 27727338b2c0e3f50eb0176a1044e903fcb3c3b1 (diff) | |
| download | edk2-d4d24001f78bcee965d8854fba6f08f48b4ec446.tar.gz edk2-d4d24001f78bcee965d8854fba6f08f48b4ec446.tar.bz2 edk2-d4d24001f78bcee965d8854fba6f08f48b4ec446.zip | |
OvmfPkg/PlatformInitLib: check PcdUse1GPageTable
If PcdUse1GPageTable is not enabled restrict the physical address space
used to 1TB, to limit the amount of memory needed for identity mapping
page tables.
The same already happens in case the processor has no support for
gigabyte pages.
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
| -rw-r--r-- | OvmfPkg/Library/PlatformInitLib/MemDetect.c | 5 | ||||
| -rw-r--r-- | OvmfPkg/Library/PlatformInitLib/PlatformInitLib.inf | 1 |
2 files changed, 6 insertions, 0 deletions
diff --git a/OvmfPkg/Library/PlatformInitLib/MemDetect.c b/OvmfPkg/Library/PlatformInitLib/MemDetect.c index acf90b4e93..1102b00ecb 100644 --- a/OvmfPkg/Library/PlatformInitLib/MemDetect.c +++ b/OvmfPkg/Library/PlatformInitLib/MemDetect.c @@ -663,6 +663,11 @@ PlatformAddressWidthFromCpuid ( PhysBits = 40;
}
+ if (!FixedPcdGetBool (PcdUse1GPageTable) && (PhysBits > 40)) {
+ DEBUG ((DEBUG_INFO, "%a: limit PhysBits to 40 (PcdUse1GPageTable is false)\n", __func__));
+ PhysBits = 40;
+ }
+
PlatformInfoHob->PhysMemAddressWidth = PhysBits;
PlatformInfoHob->FirstNonAddress = LShiftU64 (1, PlatformInfoHob->PhysMemAddressWidth);
}
diff --git a/OvmfPkg/Library/PlatformInitLib/PlatformInitLib.inf b/OvmfPkg/Library/PlatformInitLib/PlatformInitLib.inf index 86a82ad3e0..5a79d95b68 100644 --- a/OvmfPkg/Library/PlatformInitLib/PlatformInitLib.inf +++ b/OvmfPkg/Library/PlatformInitLib/PlatformInitLib.inf @@ -58,6 +58,7 @@ [Pcd]
gEfiMdePkgTokenSpaceGuid.PcdPciExpressBaseAddress
+ gEfiMdeModulePkgTokenSpaceGuid.PcdUse1GPageTable
[FixedPcd]
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfWorkAreaBase
|