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OvmfPkg/PlatformPei: consider AP stacks for pei memory cap 

Needed to avoid running out of memory when booting
with a large (~2048) number of vcpus.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20240214104504.2931339-3-kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2024-02-14 11:45:02 +01:00 committed by mergify[bot]
parent 9d32a02a72
commit 8757e648d1
1 changed files with 15 additions and 4 deletions
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19
OvmfPkg/PlatformPei/MemDetect.c
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@ -187,6 +187,8 @@ GetPeiMemoryCap (
UINT32 Pml4Entries;
UINT32 PdpEntries;
UINTN TotalPages;
UINT64 ApStacks;
UINT64 MemoryCap;
//
// If DXE is 32-bit, then just return the traditional 64 MB cap.
@ -235,11 +237,20 @@ GetPeiMemoryCap (
ASSERT (TotalPages <= 0x40201);
//
// Add 64 MB for miscellaneous allocations. Note that for
// PhysMemAddressWidth values close to 36, the cap will actually be
// dominated by this increment.
// With 32k stacks and 4096 vcpus this lands at 128 MB (far away
// from MAX_UINT32).
//
return (UINT32)(EFI_PAGES_TO_SIZE (TotalPages) + SIZE_64MB);
ApStacks = PlatformInfoHob->PcdCpuMaxLogicalProcessorNumber * PcdGet32 (PcdCpuApStackSize);
//
// Add 64 MB for miscellaneous allocations. Note that for
// PhysMemAddressWidth values close to 36 and a small number of
// CPUs, the cap will actually be dominated by this increment.
//
MemoryCap = EFI_PAGES_TO_SIZE (TotalPages) + ApStacks + SIZE_64MB;
ASSERT (MemoryCap <= MAX_UINT32);
return (UINT32)MemoryCap;
}
/**