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Commit 543c8dcf authored by Joerg Roedel's avatar Joerg Roedel
Browse files

iommu/vt-d: Access iomem correctly 



This fixes wrong accesses to iomem introduced by the kdump
fixing code.

Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent b690420a

drivers/iommu/intel-iommu.c

+9 −6
Original line number Diff line number Diff line
@@ -2799,15 +2799,18 @@ static void intel_iommu_init_qi(struct intel_iommu *iommu) 
}



static int copy_context_table(struct intel_iommu *iommu,

			      struct root_entry *old_re,

			      struct root_entry __iomem *old_re,

			      struct context_entry **tbl,

			      int bus, bool ext)

{

	struct context_entry *old_ce = NULL, *new_ce = NULL, ce;

	int tbl_idx, pos = 0, idx, devfn, ret = 0, did;

	struct context_entry __iomem *old_ce = NULL;

	struct context_entry *new_ce = NULL, ce;

	struct root_entry re;

	phys_addr_t old_ce_phys;



	tbl_idx = ext ? bus * 2 : bus;

	memcpy_fromio(&re, old_re, sizeof(re));



	for (devfn = 0; devfn < 256; devfn++) {

		/* First calculate the correct index */
@@ -2827,9 +2830,9 @@ static int copy_context_table(struct intel_iommu *iommu, 


			ret = 0;

			if (devfn < 0x80)

				old_ce_phys = root_entry_lctp(old_re);

				old_ce_phys = root_entry_lctp(&re);

			else

				old_ce_phys = root_entry_uctp(old_re);

				old_ce_phys = root_entry_uctp(&re);



			if (!old_ce_phys) {

				if (ext && devfn == 0) {
@@ -2854,7 +2857,7 @@ static int copy_context_table(struct intel_iommu *iommu, 
		}



		/* Now copy the context entry */

		ce = old_ce[idx];

		memcpy_fromio(&ce, old_ce + idx, sizeof(ce));



		if (!__context_present(&ce))

			continue;
@@ -2898,8 +2901,8 @@ static int copy_context_table(struct intel_iommu *iommu, 


static int copy_translation_tables(struct intel_iommu *iommu)

{

	struct root_entry __iomem *old_rt;

	struct context_entry **ctxt_tbls;

	struct root_entry *old_rt;

	phys_addr_t old_rt_phys;

	int ctxt_table_entries;

	unsigned long flags;

drivers/iommu/intel_irq_remapping.c

+2 −2
Original line number Diff line number Diff line
@@ -384,7 +384,7 @@ static int set_msi_sid(struct irte *irte, struct pci_dev *dev) 


static int iommu_load_old_irte(struct intel_iommu *iommu)

{

	struct irte *old_ir_table;

	struct irte __iomem *old_ir_table;

	phys_addr_t irt_phys;

	unsigned int i;

	size_t size;
@@ -413,7 +413,7 @@ static int iommu_load_old_irte(struct intel_iommu *iommu) 
		return -ENOMEM;



	/* Copy data over */

	memcpy(iommu->ir_table->base, old_ir_table, size);

	memcpy_fromio(iommu->ir_table->base, old_ir_table, size);



	__iommu_flush_cache(iommu, iommu->ir_table->base, size);