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| author | Jon Derrick <jonathan.derrick@intel.com> | 2019-09-16 15:54:35 +0200 |
|---|---|---|
| committer | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2019-09-17 18:40:18 +0200 |
| commit | a1a30170138c9c5157bd514ccd4d76b47060f29b (patch) | |
| tree | 554a6bea3e7c12796bd94d9e8880c3dcdf5ac306 /drivers/pci | |
| parent | PCI: vmd: Fix config addressing when using bus offsets (diff) | |
| download | linux-a1a30170138c9c5157bd514ccd4d76b47060f29b.tar.xz linux-a1a30170138c9c5157bd514ccd4d76b47060f29b.zip | |
PCI: vmd: Fix shadow offsets to reflect spec changes
The shadow offset scratchpad was moved to 0x2000-0x2010. Update the
location to get the correct shadow offset.
Fixes: 6788958e4f3c ("PCI: vmd: Assign membar addresses from shadow registers")
Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: stable@vger.kernel.org # v5.2+
Diffstat (limited to 'drivers/pci')
| -rw-r--r-- | drivers/pci/controller/vmd.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/pci/controller/vmd.c b/drivers/pci/controller/vmd.c index 2e4da3f51d6b..a35d3f3996d7 100644 --- a/drivers/pci/controller/vmd.c +++ b/drivers/pci/controller/vmd.c @@ -31,6 +31,9 @@ #define PCI_REG_VMLOCK 0x70 #define MB2_SHADOW_EN(vmlock) (vmlock & 0x2) +#define MB2_SHADOW_OFFSET 0x2000 +#define MB2_SHADOW_SIZE 16 + enum vmd_features { /* * Device may contain registers which hint the physical location of the @@ -578,7 +581,7 @@ static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features) u32 vmlock; int ret; - membar2_offset = 0x2018; + membar2_offset = MB2_SHADOW_OFFSET + MB2_SHADOW_SIZE; ret = pci_read_config_dword(vmd->dev, PCI_REG_VMLOCK, &vmlock); if (ret || vmlock == ~0) return -ENODEV; @@ -590,9 +593,9 @@ static int vmd_enable_domain(struct vmd_dev *vmd, unsigned long features) if (!membar2) return -ENOMEM; offset[0] = vmd->dev->resource[VMD_MEMBAR1].start - - readq(membar2 + 0x2008); + readq(membar2 + MB2_SHADOW_OFFSET); offset[1] = vmd->dev->resource[VMD_MEMBAR2].start - - readq(membar2 + 0x2010); + readq(membar2 + MB2_SHADOW_OFFSET + 8); pci_iounmap(vmd->dev, membar2); } } |