[PATCH v5 13/16] PCI: Mark MSI data shared

Kuppuswamy Sathyanarayanan
2021-10-09T00:38:58Z

From: Andi Kleen <ak@linux.intel.com>

In a TDX guest the MSI area must be shared with the host, so use
a shared mapping.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
---

Changes since v4:
* Replaced ioremap_shared() with ioremap_host_shared()

drivers/pci/msi.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c
index 0099a00af361..198ef6e6ca4f 100644
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -596,7 +596,7 @@ static void __iomem *msix_map_region(struct pci_dev *dev, unsigned nr_entries)
table_offset &= PCI_MSIX_TABLE_OFFSET;
phys_addr = pci_resource_start(dev, bir) + table_offset;

- return ioremap(phys_addr, nr_entries * PCI_MSIX_ENTRY_SIZE);
+ return ioremap_host_shared(phys_addr, nr_entries * PCI_MSIX_ENTRY_SIZE);
}

static int msix_setup_entries(struct pci_dev *dev, void __iomem *base,
--
2.25.1