[PATCH v4 06/10] xen/arm: smmuv3: Remove the unused fields for PREFETCH_CONFIG command

[Rahul Singh <rahul.singh@xxxxxxx>]

From: Zenghui Yu <yuzenghui@xxxxxxxxxx>

Backport Linux commit e0bb4b735404. This is the clean backport without
any changes.

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 <yuzenghui@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210407084448.1838-1-yuzenghui@xxxxxxxxxx
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
Origin: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 
e0bb4b735404
Signed-off-by: Rahul Singh <rahul.singh@xxxxxxx>
Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
Changes in v4:
- Move Stefano Acked-by after Signed-off
Changes in v3:
 - Added Stefano Acked-by
Changes in v2:
 - fix commit msg
---
 xen/drivers/passthrough/arm/smmu-v3.c | 2 --
 xen/drivers/passthrough/arm/smmu-v3.h | 2 --
 2 files changed, 4 deletions(-)

diff --git a/xen/drivers/passthrough/arm/smmu-v3.c 
b/xen/drivers/passthrough/arm/smmu-v3.c
index 15bb4d7e19..28fcb01757 100644
--- a/xen/drivers/passthrough/arm/smmu-v3.c
+++ b/xen/drivers/passthrough/arm/smmu-v3.c
@@ -405,8 +405,6 @@ 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_STE:
                cmd[0] |= FIELD_PREP(CMDQ_CFGI_0_SID, ent->cfgi.sid);
diff --git a/xen/drivers/passthrough/arm/smmu-v3.h 
b/xen/drivers/passthrough/arm/smmu-v3.h
index 0742bc393f..b381ad3738 100644
--- a/xen/drivers/passthrough/arm/smmu-v3.h
+++ b/xen/drivers/passthrough/arm/smmu-v3.h
@@ -456,8 +456,6 @@ struct arm_smmu_cmdq_ent {
                #define CMDQ_OP_PREFETCH_CFG    0x1
                struct {
                        u32                     sid;
-                       u8                      size;
-                       u64                     addr;
                } prefetch;
 
                #define CMDQ_OP_CFGI_STE        0x3
-- 
2.25.1