From: Jon Derrick jonathan.derrick@intel.com
commit a1a30170138c9c5157bd514ccd4d76b47060f29b upstream.
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+ Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/pci/controller/vmd.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-)
--- 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_ 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_ 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); } }