On 1/16/23 11:09, Ard Biesheuvel wrote:
On Thu, 12 Jan 2023 at 18:09, Tom Lendacky <thomas.lenda...@amd.com> wrote:
On 12/6/22 23:32, Gerd Hoffmann via groups.io wrote:
qemu uses the etc/e820 fw_cfg file not only for memory, but
also for reservations. Handle reservations by adding resource
descriptor hobs for them.
A typical qemu configuration has a small reservation between
lapic and flash:
# sudo cat /proc/iomem
[ ... ]
fee00000-fee00fff : Local APIC
feffc000-feffffff : Reserved <= HERE
ffc00000-ffffffff : Reserved
[ ... ]
Signed-off-by: Gerd Hoffmann <kra...@redhat.com>
On newer versions of Qemu, this patch causes a boot failure on my
AMD system with the following output:
...
PciHostBridgeUtilityInitRootBridge: populated root bus 0, with room for 255
subordinate bus(es)
RootBridge: PciRoot(0x0)
Support/Attr: 70069 / 70069
DmaAbove4G: No
NoExtConfSpace: No
AllocAttr: 3 (CombineMemPMem Mem64Decode)
Bus: 0 - FF Translation=0
Io: 6000 - FFFF Translation=0
Mem: C0000000 - FBFFFFFF Translation=0
MemAbove4G: E000000000 - FFFFFFFFFF Translation=0
PMem: FFFFFFFFFFFFFFFF - 0 Translation=0
PMemAbove4G: FFFFFFFFFFFFFFFF - 0 Translation=0
PciHostBridgeDxe: IntersectMemoryDescriptor: desc [FD00000000, 10000000000)
type 1 cap 8000000000026000 conflicts with aperture [E000000000, 10000000000)
cap 1
ASSERT_EFI_ERROR (Status = Invalid Parameter)
ASSERT [PciHostBridgeDxe]
/root/kernels/ovmf-build-X64/MdeModulePkg/Bus/Pci/PciHostBridgeDxe/PciHostBridge.c(550):
!(((INTN)(RETURN_STATUS)(Status)) < 0)
Doing some bisecting, before Qemu patch
8504f129450b ("i386/pc: relocate 4g start to 1T where applicable")
this issue wasn't observed. And before this OVMF patch, the newer version
of Qemu doesn't have an issue.
Also, if I add host-phys-bits=true to the Qemu -cpu parameter, then
the issue isn't observed regardless of Qemu/OVMF level.
I'm hoping someone has an understanding of what is going on and what
can be done to fix it.
Could someone look into this please? Gerd?
Looks like Gerd is already on it.
See https://bugzilla.tianocore.org/show_bug.cgi?id=4251
Thanks,
Tom
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