From: Sebastien Boeuf <sebastien.bo...@intel.com> The address space width isn't properly calculated when the platform is Cloud Hypervisor. The function PlatformAddressWidthFromCpuid() must not be invoked with the QemuQuirk boolean set to true in the Cloud Hypervisor case.
Relying on the host bridge identifier, we can set the QemuQuirk to the appropriate value, which results in the address space size to be correctly returned for Cloud Hypervisor. Having the correct address space width allows the code to calculate dynamically the MMIO space available for devices in the 64-bit address space, preventing it to fallback onto the default value (32GiB). Signed-off-by: Sebastien Boeuf <sebastien.bo...@intel.com> --- OvmfPkg/Library/PlatformInitLib/MemDetect.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/OvmfPkg/Library/PlatformInitLib/MemDetect.c b/OvmfPkg/Library/PlatformInitLib/MemDetect.c index 5aeeeff89f..a14e5c4247 100644 --- a/OvmfPkg/Library/PlatformInitLib/MemDetect.c +++ b/OvmfPkg/Library/PlatformInitLib/MemDetect.c @@ -838,6 +838,7 @@ PlatformAddressWidthInitialization ( { UINT8 PhysMemAddressWidth; EFI_STATUS Status; + BOOLEAN QemuQuirk; if (PlatformInfoHob->HostBridgeDevId == 0xffff /* microvm */) { PlatformAddressWidthFromCpuid (PlatformInfoHob, FALSE); @@ -863,7 +864,13 @@ PlatformAddressWidthInitialization ( PlatformGetFirstNonAddress (PlatformInfoHob); } - PlatformAddressWidthFromCpuid (PlatformInfoHob, TRUE); + if (PlatformInfoHob->HostBridgeDevId == CLOUDHV_DEVICE_ID) { + QemuQuirk = FALSE; + } else { + QemuQuirk = TRUE; + } + + PlatformAddressWidthFromCpuid (PlatformInfoHob, QemuQuirk); if (PlatformInfoHob->PhysMemAddressWidth != 0) { // physical address width is known PlatformDynamicMmioWindow (PlatformInfoHob); -- 2.37.2 --------------------------------------------------------------------- Intel Corporation SAS (French simplified joint stock company) Registered headquarters: "Les Montalets"- 2, rue de Paris, 92196 Meudon Cedex, France Registration Number: 302 456 199 R.C.S. NANTERRE Capital: 5 208 026.16 Euros This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies. -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#98809): https://edk2.groups.io/g/devel/message/98809 Mute This Topic: https://groups.io/mt/96354531/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-