From e82c175e63229ea495a0a0b5305a98b5b6ee5346 Mon Sep 17 00:00:00 2001 From: Lu Baolu Date: Wed, 25 Oct 2023 21:18:54 +0800 Subject: Revert "iommu/vt-d: Remove unused function" This reverts commit c61c255e114c52682546447ed44d3470b5708134. The pasid_set_wpe() helper, which was removed by the reverted commit, is still used by the nesting translation support in the iommufd tree. To avoid a merge conflict, revert the commit. Link: https://lore.kernel.org/linux-kernel/20231025153455.283c5b12@canb.auug.org.au/ Signed-off-by: Lu Baolu Reviewed-by: Jason Gunthorpe Link: https://lore.kernel.org/r/20231025131854.375388-1-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel --- drivers/iommu/intel/pasid.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/iommu/intel') diff --git a/drivers/iommu/intel/pasid.c b/drivers/iommu/intel/pasid.c index 06ddb3c927f5..8f92b92f3d2a 100644 --- a/drivers/iommu/intel/pasid.c +++ b/drivers/iommu/intel/pasid.c @@ -335,6 +335,15 @@ static inline void pasid_set_fault_enable(struct pasid_entry *pe) pasid_set_bits(&pe->val[0], 1 << 1, 0); } +/* + * Setup the WPE(Write Protect Enable) field (Bit 132) of a + * scalable mode PASID entry. + */ +static inline void pasid_set_wpe(struct pasid_entry *pe) +{ + pasid_set_bits(&pe->val[2], 1 << 4, 1 << 4); +} + /* * Setup the P(Present) field (Bit 0) of a scalable mode PASID * entry. -- cgit v1.2.3