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[PATCH 20/47] hw/i386/acpi: fix conflicting IO address range for acpi pc
From: |
Michael Roth |
Subject: |
[PATCH 20/47] hw/i386/acpi: fix conflicting IO address range for acpi pci hotplug in q35 |
Date: |
Tue, 14 Dec 2021 18:00:58 -0600 |
From: Ani Sinha <ani@anisinha.ca>
Change caf108bc58790 ("hw/i386/acpi-build: Add ACPI PCI hot-plug methods to
Q35")
selects an IO address range for acpi based PCI hotplug for q35 arbitrarily. It
starts at address 0x0cc4 and ends at 0x0cdb. At the time when the patch was
written but the final version of the patch was not yet pushed upstream, this
address range was free and did not conflict with any other IO address ranges.
However, with the following change, this address range was no
longer conflict free as in this change, the IO address range
(value of ACPI_PCIHP_SIZE) was incremented by four bytes:
b32bd763a1ca92 ("pci: introduce acpi-index property for PCI device")
This can be seen from the output of QMP command 'info mtree' :
0000000000000600-0000000000000603 (prio 0, i/o): acpi-evt
0000000000000604-0000000000000605 (prio 0, i/o): acpi-cnt
0000000000000608-000000000000060b (prio 0, i/o): acpi-tmr
0000000000000620-000000000000062f (prio 0, i/o): acpi-gpe0
0000000000000630-0000000000000637 (prio 0, i/o): acpi-smi
0000000000000cc4-0000000000000cdb (prio 0, i/o): acpi-pci-hotplug
0000000000000cd8-0000000000000ce3 (prio 0, i/o): acpi-cpu-hotplug
It shows that there is a region of conflict between IO regions of acpi
pci hotplug and acpi cpu hotplug.
Unfortunately, the change caf108bc58790 did not update the IO address range
appropriately before it was pushed upstream to accommodate the increased
length of the IO address space introduced in change b32bd763a1ca92.
Due to this bug, windows guests complain 'This device cannot find
enough free resources it can use' in the device manager panel for extended
IO buses. This issue also breaks the correct functioning of pci hotplug as the
following shows that the IO space for pci hotplug has been truncated:
(qemu) info mtree -f
FlatView #0
AS "I/O", root: io
Root memory region: io
0000000000000cc4-0000000000000cd7 (prio 0, i/o): acpi-pci-hotplug
0000000000000cd8-0000000000000cf7 (prio 0, i/o): acpi-cpu-hotplug
Therefore, in this fix, we adjust the IO address range for the acpi pci
hotplug so that it does not conflict with cpu hotplug and there is no
truncation of IO spaces. The starting IO address of PCI hotplug region
has been decremented by four bytes in order to accommodate four byte
increment in the IO address space introduced by change
b32bd763a1ca92 ("pci: introduce acpi-index property for PCI device")
After fixing, the following are the corrected IO ranges:
0000000000000600-0000000000000603 (prio 0, i/o): acpi-evt
0000000000000604-0000000000000605 (prio 0, i/o): acpi-cnt
0000000000000608-000000000000060b (prio 0, i/o): acpi-tmr
0000000000000620-000000000000062f (prio 0, i/o): acpi-gpe0
0000000000000630-0000000000000637 (prio 0, i/o): acpi-smi
0000000000000cc0-0000000000000cd7 (prio 0, i/o): acpi-pci-hotplug
0000000000000cd8-0000000000000ce3 (prio 0, i/o): acpi-cpu-hotplug
This change has been tested using a Windows Server 2019 guest VM. Windows
no longer complains after this change.
Fixes: caf108bc58790 ("hw/i386/acpi-build: Add ACPI PCI hot-plug methods to
Q35")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/561
Signed-off-by: Ani Sinha <ani@anisinha.ca>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Julia Suvorova <jusual@redhat.com>
Message-Id: <20210916132838.3469580-3-ani@anisinha.ca>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 0e780da76a6fe283a20283856718bca3986c104f)
Signed-off-by: Michael Roth <michael.roth@amd.com>
---
include/hw/acpi/ich9.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/hw/acpi/ich9.h b/include/hw/acpi/ich9.h
index a329ce43ab..f04f1791bd 100644
--- a/include/hw/acpi/ich9.h
+++ b/include/hw/acpi/ich9.h
@@ -29,7 +29,7 @@
#include "hw/acpi/acpi_dev_interface.h"
#include "hw/acpi/tco.h"
-#define ACPI_PCIHP_ADDR_ICH9 0x0cc4
+#define ACPI_PCIHP_ADDR_ICH9 0x0cc0
typedef struct ICH9LPCPMRegs {
/*
--
2.25.1
- [PATCH 10/47] hw/display/artist: Fix bug in coordinate extraction in artist_vram_read() and artist_vram_write(), (continued)
- [PATCH 10/47] hw/display/artist: Fix bug in coordinate extraction in artist_vram_read() and artist_vram_write(), Michael Roth, 2021/12/14
- [PATCH 11/47] i386/cpu: Remove AVX_VNNI feature from Cooperlake cpu model, Michael Roth, 2021/12/14
- [PATCH 12/47] 9pfs: fix crash in v9fs_walk(), Michael Roth, 2021/12/14
- [PATCH 13/47] plugins/execlog: removed unintended "s" at the end of log lines., Michael Roth, 2021/12/14
- [PATCH 14/47] plugins: do not limit exported symbols if modules are active, Michael Roth, 2021/12/14
- [PATCH 15/47] qemu-sockets: fix unix socket path copy (again), Michael Roth, 2021/12/14
- [PATCH 16/47] vhost-vsock: fix migration issue when seqpacket is supported, Michael Roth, 2021/12/14
- [PATCH 17/47] hw/arm/virt: Rename default_bus_bypass_iommu, Michael Roth, 2021/12/14
- [PATCH 18/47] hw/i386: Rename default_bus_bypass_iommu, Michael Roth, 2021/12/14
- [PATCH 19/47] bios-tables-test: allow changes in DSDT ACPI tables for q35, Michael Roth, 2021/12/14
- [PATCH 20/47] hw/i386/acpi: fix conflicting IO address range for acpi pci hotplug in q35,
Michael Roth <=
- [PATCH 01/47] virtio-balloon: don't start free page hinting if postcopy is possible, Michael Roth, 2021/12/14
- [PATCH 21/47] bios-tables-test: Update ACPI DSDT table golden blobs for q35, Michael Roth, 2021/12/14
- [PATCH 22/47] block: introduce max_hw_iov for use in scsi-generic, Michael Roth, 2021/12/14
- [PATCH 23/47] pci: fix PCI resource reserve capability on BE, Michael Roth, 2021/12/14
- [PATCH 24/47] tests/acpi/bios-tables-test: add and allow changes to a new q35 DSDT table blob, Michael Roth, 2021/12/14
- [PATCH 25/47] tests/acpi/pcihp: add unit tests for hotplug on multifunction bridges for q35, Michael Roth, 2021/12/14
- [PATCH 26/47] tests/acpi/bios-tables-test: update DSDT blob for multifunction bridge test, Michael Roth, 2021/12/14
- [PATCH 27/47] block/file-posix: Fix return value translation for AIO discards, Michael Roth, 2021/12/14
- [PATCH 28/47] Partially revert "build: -no-pie is no functional linker flag", Michael Roth, 2021/12/14
- [PATCH 29/47] target-i386: mmu: use pg_mode instead of HF_LMA_MASK, Michael Roth, 2021/12/14