linux-kernel - [PATCH 4.14 22/31] iommu/amd: Set DTE[IntTabLen] to represent 512 IRTEs

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Date:   Thu, 10 Dec 2020 15:26:59 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jerry Snitselaar <jsnitsel@...hat.com>,
        Suravee Suthikulpanit <suravee.suthikulpanit@....com>,
        Will Deacon <will@...nel.org>
Subject: [PATCH 4.14 22/31] iommu/amd: Set DTE[IntTabLen] to represent 512 IRTEs

From: Suravee Suthikulpanit <suravee.suthikulpanit@....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@...hat.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@....com>
Reviewed-by: Jerry Snitselaar <jsnitsel@...hat.com>
Link: https://lore.kernel.org/r/20201207091920.3052-1-suravee.suthikulpanit@amd.com
Signed-off-by: Will Deacon <will@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/iommu/amd_iommu_types.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iommu/amd_iommu_types.h
+++ b/drivers/iommu/amd_iommu_types.h
@@ -255,7 +255,7 @@
 #define DTE_IRQ_REMAP_INTCTL_MASK	(0x3ULL << 60)
 #define DTE_IRQ_TABLE_LEN_MASK	(0xfULL << 1)
 #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
 
 #define PAGE_MODE_NONE    0x00