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24 Oct 2019 23:42:57 -0700 Received: from fmsmsx117.amr.corp.intel.com (10.18.116.17) by fmsmsx107.amr.corp.intel.com (10.18.124.205) with Microsoft SMTP Server (TLS) id 14.3.439.0; Thu, 24 Oct 2019 23:42:57 -0700 Received: from shsmsx102.ccr.corp.intel.com (10.239.4.154) by fmsmsx117.amr.corp.intel.com (10.18.116.17) with Microsoft SMTP Server (TLS) id 14.3.439.0; Thu, 24 Oct 2019 23:42:57 -0700 Received: from shsmsx104.ccr.corp.intel.com ([169.254.5.166]) by shsmsx102.ccr.corp.intel.com ([169.254.2.176]) with mapi id 14.03.0439.000; Fri, 25 Oct 2019 14:42:55 +0800 From: "Tian, Kevin" To: Jacob Pan , "iommu@lists.linux-foundation.org" , LKML , Joerg Roedel , "David Woodhouse" , Alex Williamson , Jean-Philippe Brucker Subject: RE: [PATCH v7 06/11] iommu/vt-d: Avoid duplicated code for PASID setup Thread-Topic: [PATCH v7 06/11] iommu/vt-d: Avoid duplicated code for PASID setup Thread-Index: AQHViqRWsNCM4P1XlkW1vczMQuE5vadq6W7w Date: Fri, 25 Oct 2019 06:42:54 +0000 Message-ID: References: <1571946904-86776-1-git-send-email-jacob.jun.pan@linux.intel.com> <1571946904-86776-7-git-send-email-jacob.jun.pan@linux.intel.com> In-Reply-To: <1571946904-86776-7-git-send-email-jacob.jun.pan@linux.intel.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ctpclassification: CTP_NT x-titus-metadata-40: eyJDYXRlZ29yeUxhYmVscyI6IiIsIk1ldGFkYXRhIjp7Im5zIjoiaHR0cDpcL1wvd3d3LnRpdHVzLmNvbVwvbnNcL0ludGVsMyIsImlkIjoiNDZhYzZiMzMtMTE4Yy00MzQ3LWE5MGUtMTg0MzBlMDBmMjgxIiwicHJvcHMiOlt7Im4iOiJDVFBDbGFzc2lmaWNhdGlvbiIsInZhbHMiOlt7InZhbHVlIjoiQ1RQX05UIn1dfV19LCJTdWJqZWN0TGFiZWxzIjpbXSwiVE1DVmVyc2lvbiI6IjE3LjEwLjE4MDQuNDkiLCJUcnVzdGVkTGFiZWxIYXNoIjoiVXhDZW9VM3V4U1NjaWp2bllhcThFXC9EZHEzSjF1aVRIUFwvUDJ0SUs1ekFXcnIzYkplZWtKYUp4bVRpdUQxU3dhIn0= dlp-product: dlpe-windows dlp-version: 11.0.400.15 dlp-reaction: no-action x-originating-ip: [10.239.127.40] MIME-Version: 1.0 Cc: "Raj, Ashok" , Jonathan Cameron X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org > 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 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 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu