# \[PATCH v4 12/15\] pci: Mark MSI data shared - From: Kuppuswamy Sathyanarayanan \ - Date: 2021-08-05 00:54:49 - List: linux-doc - Page: https://ratatoskr.run/linux-doc/2021/08/1468294 - Thread: https://ratatoskr.run/linux-pci/2021/08/1468282/t.md ```text From: Andi Kleen In a TDX guest the MSI area must be shared with the host, so use a shared mapping. Signed-off-by: Andi Kleen Signed-off-by: Kuppuswamy Sathyanarayanan --- 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 9232255c8515..c6cf1b756d74 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -682,7 +682,7 @@ 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_shared(phys_addr, nr_entries * PCI_MSIX_ENTRY_SIZE); } static int msix_setup_entries(struct pci_dev *dev, void __iomem *base, -- 2.25.1 ```