iommu/vt-d: Enable upto 57 bits of domain address width
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Web: https://git.kernel.org/torvalds/c/5e3b4a15dd8da6bded2092694c8db3b505cbf711 Commit: 5e3b4a15dd8da6bded2092694c8db3b505cbf711 Parent: 9d2e6505f6d6934e681aed502f566198cb25c74a Refname: refs/heads/master Author: Sohil Mehta <[email protected]> AuthorDate: Wed Dec 20 11:59:24 2017 -0800 Committer: Joerg Roedel <[email protected]> CommitDate: Wed Jan 17 15:02:49 2018 +0100 iommu/vt-d: Enable upto 57 bits of domain address width Update the IOMMU default domain address width to 57 bits. This would enable the IOMMU to do upto 5-levels of paging for second level translations - IOVA translation requests without PASID. Even though the maximum supported address width is being increased to 57, __iommu_calculate_agaw() would set the actual supported address width to the maximum support available in IOMMU hardware. Signed-off-by: Sohil Mehta <[email protected]> Signed-off-by: Joerg Roedel <[email protected]> --- drivers/iommu/intel-iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 869f37d1f3b7..53227d6e911e 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -64,7 +64,7 @@ #define IOAPIC_RANGE_END (0xfeefffff) #define IOVA_START_ADDR (0x1000) -#define DEFAULT_DOMAIN_ADDRESS_WIDTH 48 +#define DEFAULT_DOMAIN_ADDRESS_WIDTH 57 #define MAX_AGAW_WIDTH 64 #define MAX_AGAW_PFN_WIDTH (MAX_AGAW_WIDTH - VTD_PAGE_SHIFT) -- To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html