linux-kernel - Re: [PATCH v4 01/11] iommu/sva: Rename CONFIG_IOMMU_SVA_LIB to CONFIG_IOMMU

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Date:   Tue, 8 Feb 2022 10:39:41 +0800
From:   Lu Baolu <baolu.lu@...ux.intel.com>
To:     Fenghua Yu <fenghua.yu@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...nel.org>,
        Tony Luck <tony.luck@...el.com>,
        Joerg Roedel <joro@...tes.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        Ashok Raj <ashok.raj@...el.com>,
        Ravi V Shankar <ravi.v.shankar@...el.com>
Cc:     baolu.lu@...ux.intel.com, iommu@...ts.linux-foundation.org,
        x86 <x86@...nel.org>, linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 01/11] iommu/sva: Rename CONFIG_IOMMU_SVA_LIB to
 CONFIG_IOMMU_SVA

On 2/8/22 7:02 AM, Fenghua Yu wrote:
> This CONFIG option originally only referred to the Shared
> Virtual Address (SVA) library. But it is now also used for
> non-library portions of code.
> 
> Drop the "_LIB" suffix so that there is just one configuration
> options for all code relating to SVA.
> 
> Signed-off-by: Fenghua Yu <fenghua.yu@...el.com>
> Reviewed-by: Tony Luck <tony.luck@...el.com>
> Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
> ---
> v4:
> - Add "Reviewed-by: Thomas Gleixner <tglx@...utronix.de>" (Thomas).
> 
> v2:
> - Add this patch for more meaningful name CONFIG_IOMMU_SVA
> 
>   drivers/iommu/Kconfig         | 6 +++---
>   drivers/iommu/Makefile        | 2 +-
>   drivers/iommu/intel/Kconfig   | 2 +-
>   drivers/iommu/iommu-sva-lib.h | 6 +++---
>   4 files changed, 8 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
> index 3eb68fa1b8cc..c79a0df090c0 100644
> --- a/drivers/iommu/Kconfig
> +++ b/drivers/iommu/Kconfig
> @@ -144,8 +144,8 @@ config IOMMU_DMA
>   	select IRQ_MSI_IOMMU
>   	select NEED_SG_DMA_LENGTH
>   
> -# Shared Virtual Addressing library
> -config IOMMU_SVA_LIB
> +# Shared Virtual Addressing
> +config IOMMU_SVA
>   	bool
>   	select IOASID
>   
> @@ -379,7 +379,7 @@ config ARM_SMMU_V3
>   config ARM_SMMU_V3_SVA
>   	bool "Shared Virtual Addressing support for the ARM SMMUv3"
>   	depends on ARM_SMMU_V3
> -	select IOMMU_SVA_LIB
> +	select IOMMU_SVA
>   	select MMU_NOTIFIER
>   	help
>   	  Support for sharing process address spaces with devices using the
> diff --git a/drivers/iommu/Makefile b/drivers/iommu/Makefile
> index bc7f730edbb0..44475a9b3eea 100644
> --- a/drivers/iommu/Makefile
> +++ b/drivers/iommu/Makefile
> @@ -27,6 +27,6 @@ obj-$(CONFIG_FSL_PAMU) += fsl_pamu.o fsl_pamu_domain.o
>   obj-$(CONFIG_S390_IOMMU) += s390-iommu.o
>   obj-$(CONFIG_HYPERV_IOMMU) += hyperv-iommu.o
>   obj-$(CONFIG_VIRTIO_IOMMU) += virtio-iommu.o
> -obj-$(CONFIG_IOMMU_SVA_LIB) += iommu-sva-lib.o io-pgfault.o
> +obj-$(CONFIG_IOMMU_SVA) += iommu-sva-lib.o io-pgfault.o
>   obj-$(CONFIG_SPRD_IOMMU) += sprd-iommu.o
>   obj-$(CONFIG_APPLE_DART) += apple-dart.o
> diff --git a/drivers/iommu/intel/Kconfig b/drivers/iommu/intel/Kconfig
> index 247d0f2d5fdf..39a06d245f12 100644
> --- a/drivers/iommu/intel/Kconfig
> +++ b/drivers/iommu/intel/Kconfig
> @@ -52,7 +52,7 @@ config INTEL_IOMMU_SVM
>   	select PCI_PRI
>   	select MMU_NOTIFIER
>   	select IOASID
> -	select IOMMU_SVA_LIB
> +	select IOMMU_SVA
>   	help
>   	  Shared Virtual Memory (SVM) provides a facility for devices
>   	  to access DMA resources through process address space by
> diff --git a/drivers/iommu/iommu-sva-lib.h b/drivers/iommu/iommu-sva-lib.h
> index 031155010ca8..95dc3ebc1928 100644
> --- a/drivers/iommu/iommu-sva-lib.h
> +++ b/drivers/iommu/iommu-sva-lib.h
> @@ -17,7 +17,7 @@ struct device;
>   struct iommu_fault;
>   struct iopf_queue;
>   
> -#ifdef CONFIG_IOMMU_SVA_LIB
> +#ifdef CONFIG_IOMMU_SVA
>   int iommu_queue_iopf(struct iommu_fault *fault, void *cookie);
>   
>   int iopf_queue_add_device(struct iopf_queue *queue, struct device *dev);
> @@ -28,7 +28,7 @@ struct iopf_queue *iopf_queue_alloc(const char *name);
>   void iopf_queue_free(struct iopf_queue *queue);
>   int iopf_queue_discard_partial(struct iopf_queue *queue);
>   
> -#else /* CONFIG_IOMMU_SVA_LIB */
> +#else /* CONFIG_IOMMU_SVA */
>   static inline int iommu_queue_iopf(struct iommu_fault *fault, void *cookie)
>   {
>   	return -ENODEV;
> @@ -64,5 +64,5 @@ static inline int iopf_queue_discard_partial(struct iopf_queue *queue)
>   {
>   	return -ENODEV;
>   }
> -#endif /* CONFIG_IOMMU_SVA_LIB */
> +#endif /* CONFIG_IOMMU_SVA */
>   #endif /* _IOMMU_SVA_LIB_H */

Reviewed-by: Lu Baolu <baolu.lu@...ux.intel.com>

Best regards,
baolu