Re: [PATCH] iommu/arm-smmu-v3: Remove the unused fields for PREFETCH_CONFIG command

2021-04-07 Thread Will Deacon 
On Wed, 7 Apr 2021 16:44:48 +0800, Zenghui Yu wrote:
> Per SMMUv3 spec, there is no Size and Addr field in the PREFETCH_CONFIG
> command and they're not used by the driver. Remove them.
> 
> We can add them back if we're going to use PREFETCH_ADDR in the future.

Applied to will (for-joerg/arm-smmu/updates), thanks!

[1/1] iommu/arm-smmu-v3: Remove the unused fields for PREFETCH_CONFIG command
  https://git.kernel.org/will/c/e0bb4b735404

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
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[PATCH] iommu/arm-smmu-v3: Remove the unused fields for PREFETCH_CONFIG command

2021-04-07 Thread Zenghui Yu 
Per SMMUv3 spec, there is no Size and Addr field in the PREFETCH_CONFIG
command and they're not used by the driver. Remove them.

We can add them back if we're going to use PREFETCH_ADDR in the future.

Signed-off-by: Zenghui Yu 
---
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 2 --
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 2 --
 2 files changed, 4 deletions(-)

diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c 
b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 8594b4a83043..610c9f4b7789 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -245,8 +245,6 @@ static int arm_smmu_cmdq_build_cmd(u64 *cmd, struct 
arm_smmu_cmdq_ent *ent)
break;
case CMDQ_OP_PREFETCH_CFG:
cmd[0] |= FIELD_PREP(CMDQ_PREFETCH_0_SID, ent->prefetch.sid);
-   cmd[1] |= FIELD_PREP(CMDQ_PREFETCH_1_SIZE, ent->prefetch.size);
-   cmd[1] |= ent->prefetch.addr & CMDQ_PREFETCH_1_ADDR_MASK;
break;
case CMDQ_OP_CFGI_CD:
cmd[0] |= FIELD_PREP(CMDQ_CFGI_0_SSID, ent->cfgi.ssid);
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h 
b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
index f985817c967a..83726b6a1cba 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
@@ -410,8 +410,6 @@ struct arm_smmu_cmdq_ent {
#define CMDQ_OP_PREFETCH_CFG0x1
struct {
u32 sid;
-   u8  size;
-   u64 addr;
} prefetch;
 
#define CMDQ_OP_CFGI_STE0x3
-- 
2.19.1

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