Messages in this thread | | | From | sathyanarayanan.kuppuswamy@linux ... | Subject | [PATCH v2 0/2] Add page alignment check in Intel IOMMU. | Date | Mon, 11 Feb 2019 13:44:33 -0800 |
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From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
As per Intel vt-d specification, Rev 3.0 (section 7.5.1.1, title "Page Request Descriptor"), Intel IOMMU page request descriptor only uses bits[63:12] of the Page Address. Hence its required to enforce that the device will only send page request with page-aligned address. So, this patch set adds support to verify whether the device uses page aligned address before enabling the ATS service in Intel IOMMU driver.
Changes since v1: * Fixed issue with PCI_ATS_CAP_PAGE_ALIGNED macro. * Fixed comments.
Kuppuswamy Sathyanarayanan (2): PCI/ATS: Add pci_ats_page_aligned() interface iommu/vt-d: Enable ATS only if the device uses page aligned address.
drivers/iommu/intel-iommu.c | 1 + drivers/pci/ats.c | 27 +++++++++++++++++++++++++++ include/linux/pci.h | 2 ++ include/uapi/linux/pci_regs.h | 1 + 4 files changed, 31 insertions(+)
-- 2.20.1
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