Commit 2b8d8c96 authored Dec 07, 2020 by Suravee Suthikulpanit Committed by Greg Kroah-Hartman Dec 11, 2020

iommu/amd: Set DTE[IntTabLen] to represent 512 IRTEs



commit 4165bf015ba9454f45beaad621d16c516d5c5afe upstream.

According to the AMD IOMMU spec, the commit 73db2fc595f3
("iommu/amd: Increase interrupt remapping table limit to 512 entries")
also requires the interrupt table length (IntTabLen) to be set to 9
(power of 2) in the device table mapping entry (DTE).

Fixes: 73db2fc595f3 ("iommu/amd: Increase interrupt remapping table limit to 512 entries")
Reported-by: Jerry Snitselaar <jsnitsel@redhat.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com>
Link: https://lore.kernel.org/r/20201207091920.3052-1-suravee.suthikulpanit@amd.com


Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 46926867

drivers/iommu/amd_iommu.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -3661,7 +3661,7 @@ static struct irq_chip amd_ir_chip;

		#define DTE_IRQ_PHYS_ADDR_MASK (((1ULL << 45)-1) << 6)
		#define DTE_IRQ_REMAP_INTCTL (2ULL << 60)
		#define DTE_IRQ_TABLE_LEN (8ULL << 1)
		#define DTE_IRQ_TABLE_LEN (9ULL << 1)
		#define DTE_IRQ_REMAP_ENABLE 1ULL

		static void set_dte_irq_entry(u16 devid, struct irq_remap_table *table)