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From: "Tian, Kevin" <kevin.tian@intel.com>
To: Jacob Pan <jacob.jun.pan@linux.intel.com>,
	"iommu@lists.linux-foundation.org"
	<iommu@lists.linux-foundation.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Joerg Roedel <joro@8bytes.org>,
	"David Woodhouse" <dwmw2@infradead.org>,
	Alex Williamson <alex.williamson@redhat.com>,
	Jean-Philippe Brucker <jean-philippe@linaro.com>
Cc: "Raj, Ashok" <ashok.raj@intel.com>, Jonathan Cameron <jic23@kernel.org>
Subject: RE: [PATCH v7 06/11] iommu/vt-d: Avoid duplicated code for PASID setup
Date: Fri, 25 Oct 2019 06:42:54 +0000
Message-ID: <AADFC41AFE54684AB9EE6CBC0274A5D19D5CDCA0@SHSMSX104.ccr.corp.intel.com> (raw)
In-Reply-To: <1571946904-86776-7-git-send-email-jacob.jun.pan@linux.intel.com>

> From: Jacob Pan [mailto:jacob.jun.pan@linux.intel.com]
> Sent: Friday, October 25, 2019 3:55 AM
> 
> After each setup for PASID entry, related translation caches must be
> flushed.
> We can combine duplicated code into one function which is less error
> prone.
> 
> Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>

similarly, it doesn't need to be in this series.

> ---
>  drivers/iommu/intel-pasid.c | 48 +++++++++++++++++---------------------------
> -
>  1 file changed, 18 insertions(+), 30 deletions(-)
> 
> diff --git a/drivers/iommu/intel-pasid.c b/drivers/iommu/intel-pasid.c
> index e79d680fe300..ffbd416ed3b8 100644
> --- a/drivers/iommu/intel-pasid.c
> +++ b/drivers/iommu/intel-pasid.c
> @@ -485,6 +485,21 @@ void intel_pasid_tear_down_entry(struct
> intel_iommu *iommu,
>  		devtlb_invalidation_with_pasid(iommu, dev, pasid);
>  }
> 
> +static void pasid_flush_caches(struct intel_iommu *iommu,
> +				struct pasid_entry *pte,
> +				int pasid, u16 did)
> +{
> +	if (!ecap_coherent(iommu->ecap))
> +		clflush_cache_range(pte, sizeof(*pte));
> +
> +	if (cap_caching_mode(iommu->cap)) {
> +		pasid_cache_invalidation_with_pasid(iommu, did, pasid);
> +		iotlb_invalidation_with_pasid(iommu, did, pasid);
> +	} else {
> +		iommu_flush_write_buffer(iommu);
> +	}
> +}
> +
>  /*
>   * Set up the scalable mode pasid table entry for first only
>   * translation type.
> @@ -530,16 +545,7 @@ int intel_pasid_setup_first_level(struct
> intel_iommu *iommu,
>  	/* Setup Present and PASID Granular Transfer Type: */
>  	pasid_set_translation_type(pte, 1);
>  	pasid_set_present(pte);
> -
> -	if (!ecap_coherent(iommu->ecap))
> -		clflush_cache_range(pte, sizeof(*pte));
> -
> -	if (cap_caching_mode(iommu->cap)) {
> -		pasid_cache_invalidation_with_pasid(iommu, did, pasid);
> -		iotlb_invalidation_with_pasid(iommu, did, pasid);
> -	} else {
> -		iommu_flush_write_buffer(iommu);
> -	}
> +	pasid_flush_caches(iommu, pte, pasid, did);
> 
>  	return 0;
>  }
> @@ -603,16 +609,7 @@ int intel_pasid_setup_second_level(struct
> intel_iommu *iommu,
>  	 */
>  	pasid_set_sre(pte);
>  	pasid_set_present(pte);
> -
> -	if (!ecap_coherent(iommu->ecap))
> -		clflush_cache_range(pte, sizeof(*pte));
> -
> -	if (cap_caching_mode(iommu->cap)) {
> -		pasid_cache_invalidation_with_pasid(iommu, did, pasid);
> -		iotlb_invalidation_with_pasid(iommu, did, pasid);
> -	} else {
> -		iommu_flush_write_buffer(iommu);
> -	}
> +	pasid_flush_caches(iommu, pte, pasid, did);
> 
>  	return 0;
>  }
> @@ -646,16 +643,7 @@ int intel_pasid_setup_pass_through(struct
> intel_iommu *iommu,
>  	 */
>  	pasid_set_sre(pte);
>  	pasid_set_present(pte);
> -
> -	if (!ecap_coherent(iommu->ecap))
> -		clflush_cache_range(pte, sizeof(*pte));
> -
> -	if (cap_caching_mode(iommu->cap)) {
> -		pasid_cache_invalidation_with_pasid(iommu, did, pasid);
> -		iotlb_invalidation_with_pasid(iommu, did, pasid);
> -	} else {
> -		iommu_flush_write_buffer(iommu);
> -	}
> +	pasid_flush_caches(iommu, pte, pasid, did);
> 
>  	return 0;
>  }
> --
> 2.7.4

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  parent reply index

Thread overview: 78+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-24 19:54 [PATCH v7 00/11] Nested Shared Virtual Address (SVA) VT-d support Jacob Pan
2019-10-24 19:54 ` [PATCH v7 01/11] iommu/vt-d: Cache virtual command capability register Jacob Pan
2019-10-25  2:53   ` Lu Baolu
2019-10-25  6:06   ` Tian, Kevin
2019-11-08 10:32   ` Auger Eric
2019-10-24 19:54 ` [PATCH v7 02/11] iommu/vt-d: Enlightened PASID allocation Jacob Pan
2019-10-25  6:19   ` Tian, Kevin
2019-10-29 17:14     ` Jacob Pan
2019-10-29 18:16       ` Tian, Kevin
2019-11-08 10:33   ` Auger Eric
2019-11-08 22:22     ` Jacob Pan
2019-10-24 19:54 ` [PATCH v7 03/11] iommu/vt-d: Add custom allocator for IOASID Jacob Pan
2019-10-25  2:30   ` Lu Baolu
2019-10-25  4:43     ` Jacob Pan
2019-10-25  6:40       ` Tian, Kevin
2019-10-25 14:39         ` Lu Baolu
2019-10-25 15:52           ` Tian, Kevin
2019-10-28 22:49             ` Jacob Pan
2019-10-29  2:22               ` Lu Baolu
2019-10-25  6:31   ` Tian, Kevin
2019-10-28 22:52     ` Jacob Pan
2019-11-08 10:40   ` Auger Eric
2019-11-08 22:26     ` Jacob Pan
2019-10-24 19:54 ` [PATCH v7 04/11] iommu/vt-d: Replace Intel specific PASID allocator with IOASID Jacob Pan
2019-10-25  5:47   ` Lu Baolu
2019-11-01 18:29     ` Jacob Pan
2019-10-25  6:41   ` Tian, Kevin
2019-10-28 22:46     ` Jacob Pan
2019-11-08 11:30   ` Auger Eric
2019-11-08 22:55     ` Jacob Pan
2019-11-12  9:54       ` Auger Eric
2019-10-24 19:54 ` [PATCH v7 05/11] iommu/vt-d: Move domain helper to header Jacob Pan
2019-10-25  5:26   ` Lu Baolu
2019-10-24 19:54 ` [PATCH v7 06/11] iommu/vt-d: Avoid duplicated code for PASID setup Jacob Pan
2019-10-25  5:32   ` Lu Baolu
2019-10-25  6:42   ` Tian, Kevin [this message]
2019-10-28 22:41     ` Jacob Pan
2019-11-12  9:54   ` Auger Eric
2019-10-24 19:55 ` [PATCH v7 07/11] iommu/vt-d: Add nested translation helper function Jacob Pan
2019-10-25  7:04   ` Tian, Kevin
2019-11-01 21:10     ` Jacob Pan
2019-10-25 15:04   ` Lu Baolu
2019-10-25 16:06     ` Jacob Pan
2019-11-08 13:55   ` Auger Eric
2019-10-24 19:55 ` [PATCH v7 08/11] iommu/vt-d: Misc macro clean up for SVM Jacob Pan
2019-10-26  1:00   ` Lu Baolu
2019-10-28 22:38     ` Jacob Pan
2019-10-24 19:55 ` [PATCH v7 09/11] iommu/vt-d: Add bind guest PASID support Jacob Pan
2019-10-25  7:19   ` Tian, Kevin
2019-10-25 17:33     ` Jacob Pan
2019-10-28  6:03       ` Tian, Kevin
2019-10-28 16:02         ` Jacob Pan
2019-10-29  7:57           ` Tian, Kevin
2019-10-29 16:11             ` Jacob Pan
2019-10-29 18:04               ` Tian, Kevin
2019-10-29  2:33         ` Lu Baolu
2019-10-26  2:01   ` Lu Baolu
2019-10-28 22:29     ` Jacob Pan
2019-10-29  2:54       ` Lu Baolu
2019-10-29  4:11         ` Jacob Pan
2019-10-29  5:04           ` Lu Baolu
2019-10-24 19:55 ` [PATCH v7 10/11] iommu/vt-d: Support flushing more translation cache types Jacob Pan
2019-10-25  7:21   ` Tian, Kevin
2019-11-01 21:30     ` Jacob Pan
2019-10-26  2:22   ` Lu Baolu
2019-11-01 21:28     ` Jacob Pan
2019-11-08 16:18   ` Auger Eric
2019-11-08 23:05     ` Jacob Pan
2019-10-24 19:55 ` [PATCH v7 11/11] iommu/vt-d: Add svm/sva invalidate function Jacob Pan
2019-10-25  7:27   ` Tian, Kevin
2019-10-26  2:40     ` Lu Baolu
2019-10-26  7:03       ` Lu Baolu
2019-10-28  6:06         ` Tian, Kevin
2019-10-28 16:10           ` Jacob Pan
2019-10-29 18:52             ` Tian, Kevin
2019-10-29 19:25               ` Jacob Pan
2019-10-28 16:13     ` Jacob Pan
2019-11-12 10:28   ` Auger Eric

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