diff options
| author | Jiqian Chen <Jiqian.Chen@amd.com> | 2023-07-25 18:45:45 +0800 |
|---|---|---|
| committer | Huang Rui <ray.huang@amd.com> | 2023-08-20 17:09:50 +0800 |
| commit | de602e087e62187c807c072c3249651aa4c3441c (patch) | |
| tree | 0150e16a462851a724ef57974853fe435b9ff05e | |
| parent | fa7c8bf8de79d0b3cb6ecdb6a25d5e961827b119 (diff) | |
| download | linux-upstream-for-xen-v2.tar.gz | |
drivers/pci: Workaround for restore Rebar stateupstream-for-xen-v2
Rebar capability is disabled when dGPU is used on PVH dom0.
So, we don't restore rebar state here.
This workaround can be removed when Rebar is correctly
performed.
Signed-off-by: Jiqian Chen <Jiqian.Chen@amd.com>
Reviewed-by: Huang Rui <Ray.Huang@amd.com>
Signed-off-by: Huang Rui <ray.huang@amd.com>
| -rw-r--r-- | drivers/pci/pci.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c index 60230da957e0c4..4b05bccc2ece9d 100644 --- a/drivers/pci/pci.c +++ b/drivers/pci/pci.c @@ -32,6 +32,7 @@ #include <asm/dma.h> #include <linux/aer.h> #include <linux/bitfield.h> +#include <xen/xen.h> #include "pci.h" DEFINE_MUTEX(pci_slot_mutex); @@ -1765,6 +1766,14 @@ static void pci_restore_rebar_state(struct pci_dev *pdev) unsigned int pos, nbars, i; u32 ctrl; + /* + * PVH dom0 doesn't support resizable bar capability, + * we don't need to restore rebar on PVH dom0. + */ + if (xen_initial_domain() && xen_pvh_domain()) { + return; + } + pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_REBAR); if (!pos) return; |