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* [PATCH v2] iommu: Defer the early return in arm_(v7s/lpae)_map
@ 2020-12-07 11:57 ` Keqian Zhu
  0 siblings, 0 replies; 9+ messages in thread
From: Keqian Zhu @ 2020-12-07 11:57 UTC (permalink / raw)
  To: linux-kernel, linux-arm-kernel, iommu
  Cc: Will Deacon, Marc Zyngier, Robin Murphy, Joerg Roedel,
	Catalin Marinas, James Morse, Suzuki K Poulose,
	Sean Christopherson, Julien Thierry, Mark Brown, Thomas Gleixner,
	Andrew Morton, Alexios Zavras, wanghaibin.wang, jiangkunkun,
	Keqian Zhu

Although handling a mapping request with no permissions is a
trivial no-op, defer the early return until after the size/range
checks so that we are consistent with other mapping requests.

Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
---
 drivers/iommu/io-pgtable-arm-v7s.c | 8 ++++----
 drivers/iommu/io-pgtable-arm.c     | 8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/iommu/io-pgtable-arm-v7s.c b/drivers/iommu/io-pgtable-arm-v7s.c
index a688f22cbe3b..359b96b0fa3e 100644
--- a/drivers/iommu/io-pgtable-arm-v7s.c
+++ b/drivers/iommu/io-pgtable-arm-v7s.c
@@ -522,14 +522,14 @@ static int arm_v7s_map(struct io_pgtable_ops *ops, unsigned long iova,
 	struct io_pgtable *iop = &data->iop;
 	int ret;
 
-	/* If no access, then nothing to do */
-	if (!(prot & (IOMMU_READ | IOMMU_WRITE)))
-		return 0;
-
 	if (WARN_ON(iova >= (1ULL << data->iop.cfg.ias) ||
 		    paddr >= (1ULL << data->iop.cfg.oas)))
 		return -ERANGE;
 
+	/* If no access, then nothing to do */
+	if (!(prot & (IOMMU_READ | IOMMU_WRITE)))
+		return 0;
+
 	ret = __arm_v7s_map(data, iova, paddr, size, prot, 1, data->pgd, gfp);
 	/*
 	 * Synchronise all PTE updates for the new mapping before there's
diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c
index a7a9bc08dcd1..8ade72adab31 100644
--- a/drivers/iommu/io-pgtable-arm.c
+++ b/drivers/iommu/io-pgtable-arm.c
@@ -444,10 +444,6 @@ static int arm_lpae_map(struct io_pgtable_ops *ops, unsigned long iova,
 	arm_lpae_iopte prot;
 	long iaext = (s64)iova >> cfg->ias;
 
-	/* If no access, then nothing to do */
-	if (!(iommu_prot & (IOMMU_READ | IOMMU_WRITE)))
-		return 0;
-
 	if (WARN_ON(!size || (size & cfg->pgsize_bitmap) != size))
 		return -EINVAL;
 
@@ -456,6 +452,10 @@ static int arm_lpae_map(struct io_pgtable_ops *ops, unsigned long iova,
 	if (WARN_ON(iaext || paddr >> cfg->oas))
 		return -ERANGE;
 
+	/* If no access, then nothing to do */
+	if (!(iommu_prot & (IOMMU_READ | IOMMU_WRITE)))
+		return 0;
+
 	prot = arm_lpae_prot_to_pte(data, iommu_prot);
 	ret = __arm_lpae_map(data, iova, paddr, size, prot, lvl, ptep, gfp);
 	/*
-- 
2.23.0


^ permalink raw reply related	[flat|nested] 9+ messages in thread
* [PATCH v2] iommu: Defer the early return in arm_(v7s/lpae)_map
@ 2020-12-07 11:57 ` Keqian Zhu
  0 siblings, 0 replies; 9+ messages in thread
From: Keqian Zhu @ 2020-12-07 11:57 UTC (permalink / raw)
  To: linux-kernel, linux-arm-kernel, iommu
  Cc: Suzuki K Poulose, Marc Zyngier, jiangkunkun, Robin Murphy,
	Sean Christopherson, Alexios Zavras, Mark Brown, James Morse,
	Catalin Marinas, Keqian Zhu, wanghaibin.wang, Thomas Gleixner,
	Will Deacon, Andrew Morton, Julien Thierry

Although handling a mapping request with no permissions is a
trivial no-op, defer the early return until after the size/range
checks so that we are consistent with other mapping requests.

Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
---
 drivers/iommu/io-pgtable-arm-v7s.c | 8 ++++----
 drivers/iommu/io-pgtable-arm.c     | 8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/iommu/io-pgtable-arm-v7s.c b/drivers/iommu/io-pgtable-arm-v7s.c
index a688f22cbe3b..359b96b0fa3e 100644
--- a/drivers/iommu/io-pgtable-arm-v7s.c
+++ b/drivers/iommu/io-pgtable-arm-v7s.c
@@ -522,14 +522,14 @@ static int arm_v7s_map(struct io_pgtable_ops *ops, unsigned long iova,
 	struct io_pgtable *iop = &data->iop;
 	int ret;
 
-	/* If no access, then nothing to do */
-	if (!(prot & (IOMMU_READ | IOMMU_WRITE)))
-		return 0;
-
 	if (WARN_ON(iova >= (1ULL << data->iop.cfg.ias) ||
 		    paddr >= (1ULL << data->iop.cfg.oas)))
 		return -ERANGE;
 
+	/* If no access, then nothing to do */
+	if (!(prot & (IOMMU_READ | IOMMU_WRITE)))
+		return 0;
+
 	ret = __arm_v7s_map(data, iova, paddr, size, prot, 1, data->pgd, gfp);
 	/*
 	 * Synchronise all PTE updates for the new mapping before there's
diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c
index a7a9bc08dcd1..8ade72adab31 100644
--- a/drivers/iommu/io-pgtable-arm.c
+++ b/drivers/iommu/io-pgtable-arm.c
@@ -444,10 +444,6 @@ static int arm_lpae_map(struct io_pgtable_ops *ops, unsigned long iova,
 	arm_lpae_iopte prot;
 	long iaext = (s64)iova >> cfg->ias;
 
-	/* If no access, then nothing to do */
-	if (!(iommu_prot & (IOMMU_READ | IOMMU_WRITE)))
-		return 0;
-
 	if (WARN_ON(!size || (size & cfg->pgsize_bitmap) != size))
 		return -EINVAL;
 
@@ -456,6 +452,10 @@ static int arm_lpae_map(struct io_pgtable_ops *ops, unsigned long iova,
 	if (WARN_ON(iaext || paddr >> cfg->oas))
 		return -ERANGE;
 
+	/* If no access, then nothing to do */
+	if (!(iommu_prot & (IOMMU_READ | IOMMU_WRITE)))
+		return 0;
+
 	prot = arm_lpae_prot_to_pte(data, iommu_prot);
 	ret = __arm_lpae_map(data, iova, paddr, size, prot, lvl, ptep, gfp);
 	/*
-- 
2.23.0

_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

^ permalink raw reply related	[flat|nested] 9+ messages in thread
* [PATCH v2] iommu: Defer the early return in arm_(v7s/lpae)_map
@ 2020-12-07 11:57 ` Keqian Zhu
  0 siblings, 0 replies; 9+ messages in thread
From: Keqian Zhu @ 2020-12-07 11:57 UTC (permalink / raw)
  To: linux-kernel, linux-arm-kernel, iommu
  Cc: Suzuki K Poulose, Marc Zyngier, Joerg Roedel, jiangkunkun,
	Robin Murphy, Sean Christopherson, Alexios Zavras, Mark Brown,
	James Morse, Catalin Marinas, Keqian Zhu, wanghaibin.wang,
	Thomas Gleixner, Will Deacon, Andrew Morton, Julien Thierry

Although handling a mapping request with no permissions is a
trivial no-op, defer the early return until after the size/range
checks so that we are consistent with other mapping requests.

Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
---
 drivers/iommu/io-pgtable-arm-v7s.c | 8 ++++----
 drivers/iommu/io-pgtable-arm.c     | 8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/drivers/iommu/io-pgtable-arm-v7s.c b/drivers/iommu/io-pgtable-arm-v7s.c
index a688f22cbe3b..359b96b0fa3e 100644
--- a/drivers/iommu/io-pgtable-arm-v7s.c
+++ b/drivers/iommu/io-pgtable-arm-v7s.c
@@ -522,14 +522,14 @@ static int arm_v7s_map(struct io_pgtable_ops *ops, unsigned long iova,
 	struct io_pgtable *iop = &data->iop;
 	int ret;
 
-	/* If no access, then nothing to do */
-	if (!(prot & (IOMMU_READ | IOMMU_WRITE)))
-		return 0;
-
 	if (WARN_ON(iova >= (1ULL << data->iop.cfg.ias) ||
 		    paddr >= (1ULL << data->iop.cfg.oas)))
 		return -ERANGE;
 
+	/* If no access, then nothing to do */
+	if (!(prot & (IOMMU_READ | IOMMU_WRITE)))
+		return 0;
+
 	ret = __arm_v7s_map(data, iova, paddr, size, prot, 1, data->pgd, gfp);
 	/*
 	 * Synchronise all PTE updates for the new mapping before there's
diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c
index a7a9bc08dcd1..8ade72adab31 100644
--- a/drivers/iommu/io-pgtable-arm.c
+++ b/drivers/iommu/io-pgtable-arm.c
@@ -444,10 +444,6 @@ static int arm_lpae_map(struct io_pgtable_ops *ops, unsigned long iova,
 	arm_lpae_iopte prot;
 	long iaext = (s64)iova >> cfg->ias;
 
-	/* If no access, then nothing to do */
-	if (!(iommu_prot & (IOMMU_READ | IOMMU_WRITE)))
-		return 0;
-
 	if (WARN_ON(!size || (size & cfg->pgsize_bitmap) != size))
 		return -EINVAL;
 
@@ -456,6 +452,10 @@ static int arm_lpae_map(struct io_pgtable_ops *ops, unsigned long iova,
 	if (WARN_ON(iaext || paddr >> cfg->oas))
 		return -ERANGE;
 
+	/* If no access, then nothing to do */
+	if (!(iommu_prot & (IOMMU_READ | IOMMU_WRITE)))
+		return 0;
+
 	prot = arm_lpae_prot_to_pte(data, iommu_prot);
 	ret = __arm_lpae_map(data, iova, paddr, size, prot, lvl, ptep, gfp);
 	/*
-- 
2.23.0


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply related	[flat|nested] 9+ messages in thread
* Re: [PATCH v2] iommu: Defer the early return in arm_(v7s/lpae)_map
  2020-12-07 11:57 ` Keqian Zhu
  (?)
@ 2020-12-08 14:20   ` Robin Murphy
  -1 siblings, 0 replies; 9+ messages in thread
From: Robin Murphy @ 2020-12-08 14:20 UTC (permalink / raw)
  To: Keqian Zhu, linux-kernel, linux-arm-kernel, iommu
  Cc: Will Deacon, Marc Zyngier, Joerg Roedel, Catalin Marinas,
	James Morse, Suzuki K Poulose, Sean Christopherson,
	Julien Thierry, Mark Brown, Thomas Gleixner, Andrew Morton,
	Alexios Zavras, wanghaibin.wang, jiangkunkun

On 2020-12-07 11:57, Keqian Zhu wrote:
> Although handling a mapping request with no permissions is a
> trivial no-op, defer the early return until after the size/range
> checks so that we are consistent with other mapping requests.

Reviewed-by: Robin Murphy <robin.murphy@arm.com>

> Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
> ---
>   drivers/iommu/io-pgtable-arm-v7s.c | 8 ++++----
>   drivers/iommu/io-pgtable-arm.c     | 8 ++++----
>   2 files changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/iommu/io-pgtable-arm-v7s.c b/drivers/iommu/io-pgtable-arm-v7s.c
> index a688f22cbe3b..359b96b0fa3e 100644
> --- a/drivers/iommu/io-pgtable-arm-v7s.c
> +++ b/drivers/iommu/io-pgtable-arm-v7s.c
> @@ -522,14 +522,14 @@ static int arm_v7s_map(struct io_pgtable_ops *ops, unsigned long iova,
>   	struct io_pgtable *iop = &data->iop;
>   	int ret;
>   
> -	/* If no access, then nothing to do */
> -	if (!(prot & (IOMMU_READ | IOMMU_WRITE)))
> -		return 0;
> -
>   	if (WARN_ON(iova >= (1ULL << data->iop.cfg.ias) ||
>   		    paddr >= (1ULL << data->iop.cfg.oas)))
>   		return -ERANGE;
>   
> +	/* If no access, then nothing to do */
> +	if (!(prot & (IOMMU_READ | IOMMU_WRITE)))
> +		return 0;
> +
>   	ret = __arm_v7s_map(data, iova, paddr, size, prot, 1, data->pgd, gfp);
>   	/*
>   	 * Synchronise all PTE updates for the new mapping before there's
> diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c
> index a7a9bc08dcd1..8ade72adab31 100644
> --- a/drivers/iommu/io-pgtable-arm.c
> +++ b/drivers/iommu/io-pgtable-arm.c
> @@ -444,10 +444,6 @@ static int arm_lpae_map(struct io_pgtable_ops *ops, unsigned long iova,
>   	arm_lpae_iopte prot;
>   	long iaext = (s64)iova >> cfg->ias;
>   
> -	/* If no access, then nothing to do */
> -	if (!(iommu_prot & (IOMMU_READ | IOMMU_WRITE)))
> -		return 0;
> -
>   	if (WARN_ON(!size || (size & cfg->pgsize_bitmap) != size))
>   		return -EINVAL;
>   
> @@ -456,6 +452,10 @@ static int arm_lpae_map(struct io_pgtable_ops *ops, unsigned long iova,
>   	if (WARN_ON(iaext || paddr >> cfg->oas))
>   		return -ERANGE;
>   
> +	/* If no access, then nothing to do */
> +	if (!(iommu_prot & (IOMMU_READ | IOMMU_WRITE)))
> +		return 0;
> +
>   	prot = arm_lpae_prot_to_pte(data, iommu_prot);
>   	ret = __arm_lpae_map(data, iova, paddr, size, prot, lvl, ptep, gfp);
>   	/*
> 

^ permalink raw reply	[flat|nested] 9+ messages in thread
* Re: [PATCH v2] iommu: Defer the early return in arm_(v7s/lpae)_map
@ 2020-12-08 14:20   ` Robin Murphy
  0 siblings, 0 replies; 9+ messages in thread
From: Robin Murphy @ 2020-12-08 14:20 UTC (permalink / raw)
  To: Keqian Zhu, linux-kernel, linux-arm-kernel, iommu
  Cc: Suzuki K Poulose, Marc Zyngier, jiangkunkun, Sean Christopherson,
	Alexios Zavras, Mark Brown, James Morse, Catalin Marinas,
	wanghaibin.wang, Thomas Gleixner, Will Deacon, Andrew Morton,
	Julien Thierry

On 2020-12-07 11:57, Keqian Zhu wrote:
> Although handling a mapping request with no permissions is a
> trivial no-op, defer the early return until after the size/range
> checks so that we are consistent with other mapping requests.

Reviewed-by: Robin Murphy <robin.murphy@arm.com>

> Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
> ---
>   drivers/iommu/io-pgtable-arm-v7s.c | 8 ++++----
>   drivers/iommu/io-pgtable-arm.c     | 8 ++++----
>   2 files changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/iommu/io-pgtable-arm-v7s.c b/drivers/iommu/io-pgtable-arm-v7s.c
> index a688f22cbe3b..359b96b0fa3e 100644
> --- a/drivers/iommu/io-pgtable-arm-v7s.c
> +++ b/drivers/iommu/io-pgtable-arm-v7s.c
> @@ -522,14 +522,14 @@ static int arm_v7s_map(struct io_pgtable_ops *ops, unsigned long iova,
>   	struct io_pgtable *iop = &data->iop;
>   	int ret;
>   
> -	/* If no access, then nothing to do */
> -	if (!(prot & (IOMMU_READ | IOMMU_WRITE)))
> -		return 0;
> -
>   	if (WARN_ON(iova >= (1ULL << data->iop.cfg.ias) ||
>   		    paddr >= (1ULL << data->iop.cfg.oas)))
>   		return -ERANGE;
>   
> +	/* If no access, then nothing to do */
> +	if (!(prot & (IOMMU_READ | IOMMU_WRITE)))
> +		return 0;
> +
>   	ret = __arm_v7s_map(data, iova, paddr, size, prot, 1, data->pgd, gfp);
>   	/*
>   	 * Synchronise all PTE updates for the new mapping before there's
> diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c
> index a7a9bc08dcd1..8ade72adab31 100644
> --- a/drivers/iommu/io-pgtable-arm.c
> +++ b/drivers/iommu/io-pgtable-arm.c
> @@ -444,10 +444,6 @@ static int arm_lpae_map(struct io_pgtable_ops *ops, unsigned long iova,
>   	arm_lpae_iopte prot;
>   	long iaext = (s64)iova >> cfg->ias;
>   
> -	/* If no access, then nothing to do */
> -	if (!(iommu_prot & (IOMMU_READ | IOMMU_WRITE)))
> -		return 0;
> -
>   	if (WARN_ON(!size || (size & cfg->pgsize_bitmap) != size))
>   		return -EINVAL;
>   
> @@ -456,6 +452,10 @@ static int arm_lpae_map(struct io_pgtable_ops *ops, unsigned long iova,
>   	if (WARN_ON(iaext || paddr >> cfg->oas))
>   		return -ERANGE;
>   
> +	/* If no access, then nothing to do */
> +	if (!(iommu_prot & (IOMMU_READ | IOMMU_WRITE)))
> +		return 0;
> +
>   	prot = arm_lpae_prot_to_pte(data, iommu_prot);
>   	ret = __arm_lpae_map(data, iova, paddr, size, prot, lvl, ptep, gfp);
>   	/*
> 
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

^ permalink raw reply	[flat|nested] 9+ messages in thread
* Re: [PATCH v2] iommu: Defer the early return in arm_(v7s/lpae)_map
@ 2020-12-08 14:20   ` Robin Murphy
  0 siblings, 0 replies; 9+ messages in thread
From: Robin Murphy @ 2020-12-08 14:20 UTC (permalink / raw)
  To: Keqian Zhu, linux-kernel, linux-arm-kernel, iommu
  Cc: Suzuki K Poulose, Marc Zyngier, Joerg Roedel, jiangkunkun,
	Sean Christopherson, Alexios Zavras, Mark Brown, James Morse,
	Catalin Marinas, wanghaibin.wang, Thomas Gleixner, Will Deacon,
	Andrew Morton, Julien Thierry

On 2020-12-07 11:57, Keqian Zhu wrote:
> Although handling a mapping request with no permissions is a
> trivial no-op, defer the early return until after the size/range
> checks so that we are consistent with other mapping requests.

Reviewed-by: Robin Murphy <robin.murphy@arm.com>

> Signed-off-by: Keqian Zhu <zhukeqian1@huawei.com>
> ---
>   drivers/iommu/io-pgtable-arm-v7s.c | 8 ++++----
>   drivers/iommu/io-pgtable-arm.c     | 8 ++++----
>   2 files changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/iommu/io-pgtable-arm-v7s.c b/drivers/iommu/io-pgtable-arm-v7s.c
> index a688f22cbe3b..359b96b0fa3e 100644
> --- a/drivers/iommu/io-pgtable-arm-v7s.c
> +++ b/drivers/iommu/io-pgtable-arm-v7s.c
> @@ -522,14 +522,14 @@ static int arm_v7s_map(struct io_pgtable_ops *ops, unsigned long iova,
>   	struct io_pgtable *iop = &data->iop;
>   	int ret;
>   
> -	/* If no access, then nothing to do */
> -	if (!(prot & (IOMMU_READ | IOMMU_WRITE)))
> -		return 0;
> -
>   	if (WARN_ON(iova >= (1ULL << data->iop.cfg.ias) ||
>   		    paddr >= (1ULL << data->iop.cfg.oas)))
>   		return -ERANGE;
>   
> +	/* If no access, then nothing to do */
> +	if (!(prot & (IOMMU_READ | IOMMU_WRITE)))
> +		return 0;
> +
>   	ret = __arm_v7s_map(data, iova, paddr, size, prot, 1, data->pgd, gfp);
>   	/*
>   	 * Synchronise all PTE updates for the new mapping before there's
> diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c
> index a7a9bc08dcd1..8ade72adab31 100644
> --- a/drivers/iommu/io-pgtable-arm.c
> +++ b/drivers/iommu/io-pgtable-arm.c
> @@ -444,10 +444,6 @@ static int arm_lpae_map(struct io_pgtable_ops *ops, unsigned long iova,
>   	arm_lpae_iopte prot;
>   	long iaext = (s64)iova >> cfg->ias;
>   
> -	/* If no access, then nothing to do */
> -	if (!(iommu_prot & (IOMMU_READ | IOMMU_WRITE)))
> -		return 0;
> -
>   	if (WARN_ON(!size || (size & cfg->pgsize_bitmap) != size))
>   		return -EINVAL;
>   
> @@ -456,6 +452,10 @@ static int arm_lpae_map(struct io_pgtable_ops *ops, unsigned long iova,
>   	if (WARN_ON(iaext || paddr >> cfg->oas))
>   		return -ERANGE;
>   
> +	/* If no access, then nothing to do */
> +	if (!(iommu_prot & (IOMMU_READ | IOMMU_WRITE)))
> +		return 0;
> +
>   	prot = arm_lpae_prot_to_pte(data, iommu_prot);
>   	ret = __arm_lpae_map(data, iova, paddr, size, prot, lvl, ptep, gfp);
>   	/*
> 

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 9+ messages in thread
* Re: [PATCH v2] iommu: Defer the early return in arm_(v7s/lpae)_map
  2020-12-07 11:57 ` Keqian Zhu
  (?)
@ 2020-12-08 15:54   ` Will Deacon
  -1 siblings, 0 replies; 9+ messages in thread
From: Will Deacon @ 2020-12-08 15:54 UTC (permalink / raw)
  To: iommu, Keqian Zhu, linux-arm-kernel, linux-kernel
  Cc: catalin.marinas, kernel-team, Will Deacon, Joerg Roedel,
	Suzuki K Poulose, jiangkunkun, wanghaibin.wang,
	Sean Christopherson, Robin Murphy, Andrew Morton, Mark Brown,
	Marc Zyngier, Thomas Gleixner, Julien Thierry, Alexios Zavras,
	James Morse

On Mon, 7 Dec 2020 19:57:58 +0800, Keqian Zhu wrote:
> Although handling a mapping request with no permissions is a
> trivial no-op, defer the early return until after the size/range
> checks so that we are consistent with other mapping requests.

Applied to arm64 (for-next/iommu/misc), thanks!

[1/1] iommu: Defer the early return in arm_(v7s/lpae)_map
      https://git.kernel.org/arm64/c/f12e0d22903e

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev

^ permalink raw reply	[flat|nested] 9+ messages in thread
* Re: [PATCH v2] iommu: Defer the early return in arm_(v7s/lpae)_map
@ 2020-12-08 15:54   ` Will Deacon
  0 siblings, 0 replies; 9+ messages in thread
From: Will Deacon @ 2020-12-08 15:54 UTC (permalink / raw)
  To: iommu, Keqian Zhu, linux-arm-kernel, linux-kernel
  Cc: Will Deacon, Suzuki K Poulose, catalin.marinas, jiangkunkun,
	Robin Murphy, Sean Christopherson, Alexios Zavras, Mark Brown,
	James Morse, Marc Zyngier, wanghaibin.wang, Andrew Morton,
	kernel-team, Thomas Gleixner, Julien Thierry

On Mon, 7 Dec 2020 19:57:58 +0800, Keqian Zhu wrote:
> Although handling a mapping request with no permissions is a
> trivial no-op, defer the early return until after the size/range
> checks so that we are consistent with other mapping requests.

Applied to arm64 (for-next/iommu/misc), thanks!

[1/1] iommu: Defer the early return in arm_(v7s/lpae)_map
      https://git.kernel.org/arm64/c/f12e0d22903e

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

^ permalink raw reply	[flat|nested] 9+ messages in thread
* Re: [PATCH v2] iommu: Defer the early return in arm_(v7s/lpae)_map
@ 2020-12-08 15:54   ` Will Deacon
  0 siblings, 0 replies; 9+ messages in thread
From: Will Deacon @ 2020-12-08 15:54 UTC (permalink / raw)
  To: iommu, Keqian Zhu, linux-arm-kernel, linux-kernel
  Cc: Will Deacon, Suzuki K Poulose, catalin.marinas, Joerg Roedel,
	jiangkunkun, Robin Murphy, Sean Christopherson, Alexios Zavras,
	Mark Brown, James Morse, Marc Zyngier, wanghaibin.wang,
	Andrew Morton, kernel-team, Thomas Gleixner, Julien Thierry

On Mon, 7 Dec 2020 19:57:58 +0800, Keqian Zhu wrote:
> Although handling a mapping request with no permissions is a
> trivial no-op, defer the early return until after the size/range
> checks so that we are consistent with other mapping requests.

Applied to arm64 (for-next/iommu/misc), thanks!

[1/1] iommu: Defer the early return in arm_(v7s/lpae)_map
      https://git.kernel.org/arm64/c/f12e0d22903e

Cheers,
-- 
Will

https://fixes.arm64.dev
https://next.arm64.dev
https://will.arm64.dev

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

^ permalink raw reply	[flat|nested] 9+ messages in thread
end of thread, other threads:[~2020-12-08 15:56 UTC | newest]

Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-12-07 11:57 [PATCH v2] iommu: Defer the early return in arm_(v7s/lpae)_map Keqian Zhu
2020-12-07 11:57 ` Keqian Zhu
2020-12-07 11:57 ` Keqian Zhu
2020-12-08 14:20 ` Robin Murphy
2020-12-08 14:20   ` Robin Murphy
2020-12-08 14:20   ` Robin Murphy
2020-12-08 15:54 ` Will Deacon
2020-12-08 15:54   ` Will Deacon
2020-12-08 15:54   ` Will Deacon

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