From: Daniel Vetter Date: Mon, 21 Jan 2013 18:48:59 +0000 (+0100) Subject: intel/iommu: force writebuffer-flush quirk on Gen 4 Chipsets X-Git-Tag: firefly_0821_release~3680^2~443^2~82^2~80 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=210561ffd72d00eccf12c0131b8024d5436bae95;p=firefly-linux-kernel-4.4.55.git intel/iommu: force writebuffer-flush quirk on Gen 4 Chipsets We already have the quirk entry for the mobile platform, but also reports on some desktop versions. So be paranoid and set it everywhere. References: http://www.mail-archive.com/dri-devel@lists.freedesktop.org/msg33138.html Cc: stable@vger.kernel.org Cc: David Woodhouse Cc: "Sankaran, Rajesh" Reported-and-tested-by: Mihai Moldovan Signed-off-by: Daniel Vetter --- diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index eca28014ef3e..f1e7b86a7c37 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -4253,13 +4253,19 @@ static void quirk_iommu_rwbf(struct pci_dev *dev) { /* * Mobile 4 Series Chipset neglects to set RWBF capability, - * but needs it: + * but needs it. Same seems to hold for the desktop versions. */ printk(KERN_INFO "DMAR: Forcing write-buffer flush capability\n"); rwbf_quirk = 1; } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2a40, quirk_iommu_rwbf); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e00, quirk_iommu_rwbf); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e10, quirk_iommu_rwbf); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e20, quirk_iommu_rwbf); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e30, quirk_iommu_rwbf); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e40, quirk_iommu_rwbf); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x2e90, quirk_iommu_rwbf); #define GGC 0x52 #define GGC_MEMORY_SIZE_MASK (0xf << 8)