From: Lu Baolu Date: Mon, 22 Jun 2020 23:13:40 +0000 (+0800) Subject: iommu/vt-d: Make Intel SVM code 64-bit only X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=9486727f5981a5ec5c0b699fb1777451bd6786e4;p=linux.git iommu/vt-d: Make Intel SVM code 64-bit only Current Intel SVM is designed by setting the pgd_t of the processor page table to FLPTR field of the PASID entry. The first level translation only supports 4 and 5 level paging structures, hence it's infeasible for the IOMMU to share a processor's page table when it's running in 32-bit mode. Let's disable 32bit support for now and claim support only when all the missing pieces are ready in the future. Fixes: 1c4f88b7f1f92 ("iommu/vt-d: Shared virtual address in scalable mode") Suggested-by: Joerg Roedel Signed-off-by: Lu Baolu Link: https://lore.kernel.org/r/20200622231345.29722-2-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel --- diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig index b510f67dfa499..6dc49ed8377a5 100644 --- a/drivers/iommu/Kconfig +++ b/drivers/iommu/Kconfig @@ -211,7 +211,7 @@ config INTEL_IOMMU_DEBUGFS config INTEL_IOMMU_SVM bool "Support for Shared Virtual Memory with Intel IOMMU" - depends on INTEL_IOMMU && X86 + depends on INTEL_IOMMU && X86_64 select PCI_PASID select PCI_PRI select MMU_NOTIFIER