mirror of https://github.com/xemu-project/xemu.git
99cb2c6c7b
When qemu runs without kvm acceleration the ACPI executions take a great
amount of time. If they take more than the default time (30sec), the
ACPI calls fail and the system might not behave correctly.
Now the _PRT table is computed on the fly. We can drastically reduce the
execution of the _PRT method if we return a pre-computed table.
Without this patch:
[ 51.343484] ACPI Error: Aborting method \_SB.PCI0._PRT due to previous error (AE_AML_LOOP_TIMEOUT) (20230628/psparse-529)
[ 51.527032] ACPI Error: Method execution failed \_SB.PCI0._PRT due to previous error (AE_AML_LOOP_TIMEOUT) (20230628/uteval-68)
[ 51.530049] virtio-pci 0000:00:02.0: can't derive routing for PCI INT A
[ 51.530797] virtio-pci 0000:00:02.0: PCI INT A: no GSI
[ 81.922901] ACPI Error: Aborting method \_SB.PCI0._PRT due to previous error (AE_AML_LOOP_TIMEOUT) (20230628/psparse-529)
[ 82.103534] ACPI Error: Method execution failed \_SB.PCI0._PRT due to previous error (AE_AML_LOOP_TIMEOUT) (20230628/uteval-68)
[ 82.106088] virtio-pci 0000:00:04.0: can't derive routing for PCI INT A
[ 82.106761] virtio-pci 0000:00:04.0: PCI INT A: no GSI
[ 112.192568] ACPI Error: Aborting method \_SB.PCI0._PRT due to previous error (AE_AML_LOOP_TIMEOUT) (20230628/psparse-529)
[ 112.486687] ACPI Error: Method execution failed \_SB.PCI0._PRT due to previous error (AE_AML_LOOP_TIMEOUT) (20230628/uteval-68)
[ 112.489554] virtio-pci 0000:00:05.0: can't derive routing for PCI INT A
[ 112.490027] virtio-pci 0000:00:05.0: PCI INT A: no GSI
[ 142.559448] ACPI Error: Aborting method \_SB.PCI0._PRT due to previous error (AE_AML_LOOP_TIMEOUT) (20230628/psparse-529)
[ 142.718596] ACPI Error: Method execution failed \_SB.PCI0._PRT due to previous error (AE_AML_LOOP_TIMEOUT) (20230628/uteval-68)
[ 142.722889] virtio-pci 0000:00:06.0: can't derive routing for PCI INT A
[ 142.724578] virtio-pci 0000:00:06.0: PCI INT A: no GSI
With this patch:
[ 22.938076] ACPI: \_SB_.LNKB: Enabled at IRQ 10
[ 24.214002] ACPI: \_SB_.LNKD: Enabled at IRQ 11
[ 25.465170] ACPI: \_SB_.LNKA: Enabled at IRQ 10
[ 27.944920] ACPI: \_SB_.LNKC: Enabled at IRQ 11
ACPI disassembly:
Scope (PCI0)
{
Method (_PRT, 0, NotSerialized) // _PRT: PCI Routing Table
{
Return (Package (0x80)
{
Package (0x04)
{
0xFFFF,
Zero,
LNKD,
Zero
},
Package (0x04)
{
0xFFFF,
One,
LNKA,
Zero
},
Package (0x04)
{
0xFFFF,
0x02,
LNKB,
Zero
},
Package (0x04)
{
0xFFFF,
0x03,
LNKC,
Zero
},
Package (0x04)
{
0x0001FFFF,
Zero,
LNKS,
Zero
},
Context: https://lore.kernel.org/virtualization/20240417145544.38d7b482@imammedo.users.ipa.redhat.com/T/#t
Signed-off-by: Ricardo Ribalda <ribalda@chromium.org>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240814115736.1580337-3-ribalda@chromium.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
|
||
|---|---|---|
| .. | ||
| 9pfs | ||
| acpi | ||
| adc | ||
| alpha | ||
| arm | ||
| audio | ||
| avr | ||
| block | ||
| char | ||
| core | ||
| cpu | ||
| cris | ||
| cxl | ||
| display | ||
| dma | ||
| fsi | ||
| gpio | ||
| hppa | ||
| hyperv | ||
| i2c | ||
| i386 | ||
| ide | ||
| input | ||
| intc | ||
| ipack | ||
| ipmi | ||
| isa | ||
| loongarch | ||
| m68k | ||
| mem | ||
| microblaze | ||
| mips | ||
| misc | ||
| net | ||
| nubus | ||
| nvme | ||
| nvram | ||
| openrisc | ||
| pci | ||
| pci-bridge | ||
| pci-host | ||
| pcmcia | ||
| ppc | ||
| remote | ||
| riscv | ||
| rtc | ||
| rx | ||
| s390x | ||
| scsi | ||
| sd | ||
| sensor | ||
| sh4 | ||
| smbios | ||
| sparc | ||
| sparc64 | ||
| ssi | ||
| timer | ||
| tpm | ||
| tricore | ||
| ufs | ||
| usb | ||
| vfio | ||
| virtio | ||
| watchdog | ||
| xen | ||
| xenpv | ||
| xtensa | ||
| Kconfig | ||
| meson.build | ||