tyler.durden
/
audk
mirror of https://github.com/acidanthera/audk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

OvmfPkg: Update PlatformAddressWidthInitialization for CloudHv 

In addition to initializing the PhysMemAddressWidth and
FirstNonAddress fields in PlatformInfoHob, the
PlatformAddressWidthInitialization function is responsible
for initializing the PcdPciMmio64Base and PcdPciMmio64Size
fields.

Currently, for CloudHv guests, the PcdPciMmio64Base is
placed immediately after either the 4G boundary or the
last RAM region, whichever is greater. We do not change
this behavior.

Previously, when booting CloudHv guests with greater than
1TiB of high memory, the PlatformAddressWidthInitialization
function incorrect calculates the amount of RAM using the
overflowed 24-bit CMOS register.

Now, we update the PlatformAddressWidthInitialization
behavior on CloudHv to scan the E820 entries to detect
the amount of RAM. This allows CloudHv guests to boot with
greater than 1TiB of RAM

Signed-off-by: Thomas Barrett <tbarrett@crusoeenergy.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Thomas Barrett 2024-01-12 18:31:43 +00:00 committed by mergify[bot]
parent bfad87ceec
commit 6d204e8fbc
1 changed files with 12 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
OvmfPkg/Library/PlatformInitLib/MemDetect.c
View File

@ -873,6 +873,18 @@ PlatformAddressWidthInitialization (
if (PlatformInfoHob->HostBridgeDevId == 0xffff /* microvm */) {
PlatformAddressWidthFromCpuid (PlatformInfoHob, FALSE);
return;
} else if (PlatformInfoHob->HostBridgeDevId == CLOUDHV_DEVICE_ID) {
PlatformInfoHob->FirstNonAddress = BASE_4GB;
Status = PlatformScanE820 (PlatformGetFirstNonAddressCB, PlatformInfoHob);
if (EFI_ERROR (Status)) {
PlatformInfoHob->FirstNonAddress = BASE_4GB + PlatformGetSystemMemorySizeAbove4gb ();
}
PlatformInfoHob->PcdPciMmio64Base = PlatformInfoHob->FirstNonAddress;
PlatformAddressWidthFromCpuid (PlatformInfoHob, FALSE);
PlatformInfoHob->PcdPciMmio64Size = PlatformInfoHob->FirstNonAddress - PlatformInfoHob->PcdPciMmio64Base;
return;
}