motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-08-03 07:43:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

virtio-pci: implement No_Soft_Reset bit

Browse source 
In current code, when guest does S3, virtio-gpu are reset due to the
bit No_Soft_Reset is not set. After resetting, the display resources
of virtio-gpu are destroyed, then the display can't come back and only
show blank after resuming.

Implement No_Soft_Reset bit of PCI_PM_CTRL register, then guest can check
this bit, if this bit is set, the devices resetting will not be done, and
then the display can work after resuming.

No_Soft_Reset bit is implemented for all virtio devices, and was tested
only on virtio-gpu device. Set it false by default for safety.

Signed-off-by: Jiqian Chen <Jiqian.Chen@amd.com>
Message-Id: <20240606102205.114671-3-Jiqian.Chen@amd.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Jiqian Chen 2024-06-06 18:22:05 +08:00 • committed by Michael S. Tsirkin
parent e6c9c9e7f4
commit 5d98e18823
3 changed files with 35 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

1
hw/core/machine.c
View file

@ -38,6 +38,7 @@ GlobalProperty hw_compat_9_0[] = {
{"arm-cpu", "backcompat-cntfrq", "true" },
{"scsi-disk-base", "migrate-emulated-scsi-request", "false" },
{"vfio-pci", "skip-vsc-check", "false" },
{ "virtio-pci", "x-pcie-pm-no-soft-reset", "off" },
};
const size_t hw_compat_9_0_len = G_N_ELEMENTS(hw_compat_9_0);