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From:   Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@linux.intel.com>
To:     Thomas Gleixner <tglx@linutronix.de>,
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Cc:     Peter H Anvin <hpa@zytor.com>, Dave Hansen <dave.hansen@intel.com>,
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Subject: [PATCH v4 12/15] pci: Mark MSI data shared
Date:   Wed,  4 Aug 2021 17:52:15 -0700
Message-Id: <20210805005218.2912076-13-sathyanarayanan.kuppuswamy@linux.intel.com>
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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>
---
 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