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| author | Jiqian Chen <Jiqian.Chen@amd.com> | 2024-06-06 18:22:05 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2024-07-01 17:16:05 -0400 |
| commit | 5d98e18823af6d5230fca8098a7ee966aaedeb29 (patch) | |
| tree | a658408abfc2f3110a63ac39e1ef70479c71d7db /hw/core | |
| parent | e6c9c9e7f46a9ecaf1d90a68595915d65cd9d72d (diff) | |
| download | focaccia-qemu-5d98e18823af6d5230fca8098a7ee966aaedeb29.tar.gz focaccia-qemu-5d98e18823af6d5230fca8098a7ee966aaedeb29.zip | |
virtio-pci: implement No_Soft_Reset bit
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>
Diffstat (limited to 'hw/core')
| -rw-r--r-- | hw/core/machine.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/hw/core/machine.c b/hw/core/machine.c index 655d75c21f..f4cba6496c 100644 --- a/hw/core/machine.c +++ b/hw/core/machine.c @@ -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); |