Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@linux.intel.com>
To:     Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        Peter Zijlstra <peterz@infradead.org>,
        Andy Lutomirski <luto@kernel.org>,
        Bjorn Helgaas <bhelgaas@google.com>,
        Richard Henderson <rth@twiddle.net>,
        Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
        James E J Bottomley <James.Bottomley@HansenPartnership.com>,
        Helge Deller <deller@gmx.de>,
        "David S . Miller" <davem@davemloft.net>,
        Arnd Bergmann <arnd@arndb.de>,
        Jonathan Corbet <corbet@lwn.net>,
        "Michael S . Tsirkin" <mst@redhat.com>,
        Paolo Bonzini <pbonzini@redhat.com>,
        David Hildenbrand <david@redhat.com>,
        Andrea Arcangeli <aarcange@redhat.com>,
        Josh Poimboeuf <jpoimboe@redhat.com>
Cc:     Peter H Anvin <hpa@zytor.com>, Dave Hansen <dave.hansen@intel.com>,
        Tony Luck <tony.luck@intel.com>,
        Dan Williams <dan.j.williams@intel.com>,
        Andi Kleen <ak@linux.intel.com>,
        Kirill Shutemov <kirill.shutemov@linux.intel.com>,
        Sean Christopherson <seanjc@google.com>,
        Kuppuswamy Sathyanarayanan <knsathya@kernel.org>,
        Kuppuswamy Sathyanarayanan 
        <sathyanarayanan.kuppuswamy@linux.intel.com>, x86@kernel.org,
        linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
        linux-alpha@vger.kernel.org, linux-mips@vger.kernel.org,
        linux-parisc@vger.kernel.org, sparclinux@vger.kernel.org,
        linux-arch@vger.kernel.org, linux-doc@vger.kernel.org,
        virtualization@lists.linux-foundation.org
Subject: [PATCH v5 13/16] PCI: Mark MSI data shared
Date:   Fri,  8 Oct 2021 17:37:08 -0700
Message-Id: <20211009003711.1390019-14-sathyanarayanan.kuppuswamy@linux.intel.com>
In-Reply-To: <20211009003711.1390019-1-sathyanarayanan.kuppuswamy@linux.intel.com>
References: <20211009003711.1390019-1-sathyanarayanan.kuppuswamy@linux.intel.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

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