From: Suravee Suthikulpanit suravee.suthikulpanit@amd.com
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.co... Signed-off-by: Will Deacon will@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/iommu/amd_iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -3625,7 +3625,7 @@ 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)