From: Jacob Pan <jacob.jun.pan@linux.intel.com> To: Auger Eric <eric.auger@redhat.com> Cc: iommu@lists.linux-foundation.org, LKML <linux-kernel@vger.kernel.org>, Joerg Roedel <joro@8bytes.org>, Alex Williamson <alex.williamson@redhat.com>, Lu Baolu <baolu.lu@linux.intel.com>, David Woodhouse <dwmw2@infradead.org>, Yi Liu <yi.l.liu@intel.com>, "Tian, Kevin" <kevin.tian@intel.com>, Raj Ashok <ashok.raj@intel.com>, Christoph Hellwig <hch@infradead.org>, Jean-Philippe Brucker <jean-philippe@linaro.com>, Jonathan Corbet <corbet@lwn.net>, jacob.jun.pan@linux.intel.com Subject: Re: [PATCH v7 5/7] iommu/uapi: Rename uapi functions Date: Mon, 17 Aug 2020 16:16:15 -0700 [thread overview] Message-ID: <20200817161615.35dac072@jacob-builder> (raw) In-Reply-To: <310ebf1c-02d6-b31f-e92e-619d46fa94aa@redhat.com> On Thu, 13 Aug 2020 10:58:53 +0200 Auger Eric <eric.auger@redhat.com> wrote: > Hi Jacob, > > On 7/30/20 2:21 AM, Jacob Pan wrote: > > User APIs such as iommu_sva_unbind_gpasid() may also be used by the > > kernel. Since we introduced user pointer to the UAPI functions, > Practically this is done in the next patch. What about something like: > > We plan to have two flavors of the same API functions, one called > through ioctls, carrying a user pointer and one called directly with > valid IOMMU UAPI structs. To differentiate both, let's rename existing > functions with an iommu_uapi_ prefix. > will do. Thanks! > Besides > Reviewed-by: Eric Auger <eric.auger@redhat.com> > > > Thanks > > Eric > > in-kernel callers cannot share the same APIs. In-kernel callers are > > also trusted, there is no need to validate the data. > > > > This patch renames all UAPI functions with iommu_uapi_ prefix such > > that is clear to the intended callers. > > > > Suggested-by: Alex Williamson <alex.williamson@redhat.com> > > Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> > > --- > > drivers/iommu/iommu.c | 18 +++++++++--------- > > include/linux/iommu.h | 31 ++++++++++++++++--------------- > > 2 files changed, 25 insertions(+), 24 deletions(-) > > > > diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c > > index b6858adc4f17..3a913ce94a3d 100644 > > --- a/drivers/iommu/iommu.c > > +++ b/drivers/iommu/iommu.c > > @@ -1950,35 +1950,35 @@ int iommu_attach_device(struct iommu_domain > > *domain, struct device *dev) } > > EXPORT_SYMBOL_GPL(iommu_attach_device); > > > > -int iommu_cache_invalidate(struct iommu_domain *domain, struct > > device *dev, > > - struct iommu_cache_invalidate_info > > *inv_info) +int iommu_uapi_cache_invalidate(struct iommu_domain > > *domain, struct device *dev, > > + struct iommu_cache_invalidate_info > > *inv_info) { > > if (unlikely(!domain->ops->cache_invalidate)) > > return -ENODEV; > > > > return domain->ops->cache_invalidate(domain, dev, > > inv_info); } > > -EXPORT_SYMBOL_GPL(iommu_cache_invalidate); > > +EXPORT_SYMBOL_GPL(iommu_uapi_cache_invalidate); > > > > -int iommu_sva_bind_gpasid(struct iommu_domain *domain, > > - struct device *dev, struct > > iommu_gpasid_bind_data *data) +int > > iommu_uapi_sva_bind_gpasid(struct iommu_domain *domain, > > + struct device *dev, struct > > iommu_gpasid_bind_data *data) { > > if (unlikely(!domain->ops->sva_bind_gpasid)) > > return -ENODEV; > > > > return domain->ops->sva_bind_gpasid(domain, dev, data); > > } > > -EXPORT_SYMBOL_GPL(iommu_sva_bind_gpasid); > > +EXPORT_SYMBOL_GPL(iommu_uapi_sva_bind_gpasid); > > > > -int iommu_sva_unbind_gpasid(struct iommu_domain *domain, struct > > device *dev, > > - ioasid_t pasid) > > +int iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain, > > struct device *dev, > > + ioasid_t pasid) > > { > > if (unlikely(!domain->ops->sva_unbind_gpasid)) > > return -ENODEV; > > > > return domain->ops->sva_unbind_gpasid(dev, pasid); > > } > > -EXPORT_SYMBOL_GPL(iommu_sva_unbind_gpasid); > > +EXPORT_SYMBOL_GPL(iommu_uapi_sva_unbind_gpasid); > > > > static void __iommu_detach_device(struct iommu_domain *domain, > > struct device *dev) > > diff --git a/include/linux/iommu.h b/include/linux/iommu.h > > index 5f0b7859d2eb..2dcc1a33f6dc 100644 > > --- a/include/linux/iommu.h > > +++ b/include/linux/iommu.h > > @@ -430,13 +430,13 @@ extern int iommu_attach_device(struct > > iommu_domain *domain, struct device *dev); > > extern void iommu_detach_device(struct iommu_domain *domain, > > struct device *dev); > > -extern int iommu_cache_invalidate(struct iommu_domain *domain, > > - struct device *dev, > > - struct > > iommu_cache_invalidate_info *inv_info); -extern int > > iommu_sva_bind_gpasid(struct iommu_domain *domain, > > - struct device *dev, struct iommu_gpasid_bind_data > > *data); -extern int iommu_sva_unbind_gpasid(struct iommu_domain > > *domain, > > - struct device *dev, ioasid_t > > pasid); +extern int iommu_uapi_cache_invalidate(struct iommu_domain > > *domain, > > + struct device *dev, > > + struct > > iommu_cache_invalidate_info *inv_info); +extern int > > iommu_uapi_sva_bind_gpasid(struct iommu_domain *domain, > > + struct device *dev, struct > > iommu_gpasid_bind_data *data); +extern int > > iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain, > > + struct device *dev, > > ioasid_t pasid); extern struct iommu_domain > > *iommu_get_domain_for_dev(struct device *dev); extern struct > > iommu_domain *iommu_get_dma_domain(struct device *dev); extern int > > iommu_map(struct iommu_domain *domain, unsigned long iova, @@ > > -1054,21 +1054,22 @@ static inline int iommu_sva_get_pasid(struct > > iommu_sva *handle) return IOMMU_PASID_INVALID; } > > > > -static inline int > > -iommu_cache_invalidate(struct iommu_domain *domain, > > - struct device *dev, > > - struct iommu_cache_invalidate_info > > *inv_info) +static inline int iommu_uapi_cache_invalidate(struct > > iommu_domain *domain, > > + struct device *dev, > > + struct > > iommu_cache_invalidate_info *inv_info) { > > return -ENODEV; > > } > > -static inline int iommu_sva_bind_gpasid(struct iommu_domain > > *domain, > > - struct device *dev, struct > > iommu_gpasid_bind_data *data) + > > +static inline int iommu_uapi_sva_bind_gpasid(struct iommu_domain > > *domain, > > + struct device *dev, > > + struct > > iommu_gpasid_bind_data *data) { > > return -ENODEV; > > } > > > > -static inline int iommu_sva_unbind_gpasid(struct iommu_domain > > *domain, > > - struct device *dev, int > > pasid) +static inline int iommu_uapi_sva_unbind_gpasid(struct > > iommu_domain *domain, > > + struct device *dev, > > int pasid) { > > return -ENODEV; > > } > > > [Jacob Pan]
WARNING: multiple messages have this Message-ID (diff)
From: Jacob Pan <jacob.jun.pan@linux.intel.com> To: Auger Eric <eric.auger@redhat.com> Cc: "Tian, Kevin" <kevin.tian@intel.com>, Raj Ashok <ashok.raj@intel.com>, Jonathan Corbet <corbet@lwn.net>, Jean-Philippe Brucker <jean-philippe@linaro.com>, Alex Williamson <alex.williamson@redhat.com>, LKML <linux-kernel@vger.kernel.org>, Christoph Hellwig <hch@infradead.org>, iommu@lists.linux-foundation.org, David Woodhouse <dwmw2@infradead.org> Subject: Re: [PATCH v7 5/7] iommu/uapi: Rename uapi functions Date: Mon, 17 Aug 2020 16:16:15 -0700 [thread overview] Message-ID: <20200817161615.35dac072@jacob-builder> (raw) In-Reply-To: <310ebf1c-02d6-b31f-e92e-619d46fa94aa@redhat.com> On Thu, 13 Aug 2020 10:58:53 +0200 Auger Eric <eric.auger@redhat.com> wrote: > Hi Jacob, > > On 7/30/20 2:21 AM, Jacob Pan wrote: > > User APIs such as iommu_sva_unbind_gpasid() may also be used by the > > kernel. Since we introduced user pointer to the UAPI functions, > Practically this is done in the next patch. What about something like: > > We plan to have two flavors of the same API functions, one called > through ioctls, carrying a user pointer and one called directly with > valid IOMMU UAPI structs. To differentiate both, let's rename existing > functions with an iommu_uapi_ prefix. > will do. Thanks! > Besides > Reviewed-by: Eric Auger <eric.auger@redhat.com> > > > Thanks > > Eric > > in-kernel callers cannot share the same APIs. In-kernel callers are > > also trusted, there is no need to validate the data. > > > > This patch renames all UAPI functions with iommu_uapi_ prefix such > > that is clear to the intended callers. > > > > Suggested-by: Alex Williamson <alex.williamson@redhat.com> > > Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> > > --- > > drivers/iommu/iommu.c | 18 +++++++++--------- > > include/linux/iommu.h | 31 ++++++++++++++++--------------- > > 2 files changed, 25 insertions(+), 24 deletions(-) > > > > diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c > > index b6858adc4f17..3a913ce94a3d 100644 > > --- a/drivers/iommu/iommu.c > > +++ b/drivers/iommu/iommu.c > > @@ -1950,35 +1950,35 @@ int iommu_attach_device(struct iommu_domain > > *domain, struct device *dev) } > > EXPORT_SYMBOL_GPL(iommu_attach_device); > > > > -int iommu_cache_invalidate(struct iommu_domain *domain, struct > > device *dev, > > - struct iommu_cache_invalidate_info > > *inv_info) +int iommu_uapi_cache_invalidate(struct iommu_domain > > *domain, struct device *dev, > > + struct iommu_cache_invalidate_info > > *inv_info) { > > if (unlikely(!domain->ops->cache_invalidate)) > > return -ENODEV; > > > > return domain->ops->cache_invalidate(domain, dev, > > inv_info); } > > -EXPORT_SYMBOL_GPL(iommu_cache_invalidate); > > +EXPORT_SYMBOL_GPL(iommu_uapi_cache_invalidate); > > > > -int iommu_sva_bind_gpasid(struct iommu_domain *domain, > > - struct device *dev, struct > > iommu_gpasid_bind_data *data) +int > > iommu_uapi_sva_bind_gpasid(struct iommu_domain *domain, > > + struct device *dev, struct > > iommu_gpasid_bind_data *data) { > > if (unlikely(!domain->ops->sva_bind_gpasid)) > > return -ENODEV; > > > > return domain->ops->sva_bind_gpasid(domain, dev, data); > > } > > -EXPORT_SYMBOL_GPL(iommu_sva_bind_gpasid); > > +EXPORT_SYMBOL_GPL(iommu_uapi_sva_bind_gpasid); > > > > -int iommu_sva_unbind_gpasid(struct iommu_domain *domain, struct > > device *dev, > > - ioasid_t pasid) > > +int iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain, > > struct device *dev, > > + ioasid_t pasid) > > { > > if (unlikely(!domain->ops->sva_unbind_gpasid)) > > return -ENODEV; > > > > return domain->ops->sva_unbind_gpasid(dev, pasid); > > } > > -EXPORT_SYMBOL_GPL(iommu_sva_unbind_gpasid); > > +EXPORT_SYMBOL_GPL(iommu_uapi_sva_unbind_gpasid); > > > > static void __iommu_detach_device(struct iommu_domain *domain, > > struct device *dev) > > diff --git a/include/linux/iommu.h b/include/linux/iommu.h > > index 5f0b7859d2eb..2dcc1a33f6dc 100644 > > --- a/include/linux/iommu.h > > +++ b/include/linux/iommu.h > > @@ -430,13 +430,13 @@ extern int iommu_attach_device(struct > > iommu_domain *domain, struct device *dev); > > extern void iommu_detach_device(struct iommu_domain *domain, > > struct device *dev); > > -extern int iommu_cache_invalidate(struct iommu_domain *domain, > > - struct device *dev, > > - struct > > iommu_cache_invalidate_info *inv_info); -extern int > > iommu_sva_bind_gpasid(struct iommu_domain *domain, > > - struct device *dev, struct iommu_gpasid_bind_data > > *data); -extern int iommu_sva_unbind_gpasid(struct iommu_domain > > *domain, > > - struct device *dev, ioasid_t > > pasid); +extern int iommu_uapi_cache_invalidate(struct iommu_domain > > *domain, > > + struct device *dev, > > + struct > > iommu_cache_invalidate_info *inv_info); +extern int > > iommu_uapi_sva_bind_gpasid(struct iommu_domain *domain, > > + struct device *dev, struct > > iommu_gpasid_bind_data *data); +extern int > > iommu_uapi_sva_unbind_gpasid(struct iommu_domain *domain, > > + struct device *dev, > > ioasid_t pasid); extern struct iommu_domain > > *iommu_get_domain_for_dev(struct device *dev); extern struct > > iommu_domain *iommu_get_dma_domain(struct device *dev); extern int > > iommu_map(struct iommu_domain *domain, unsigned long iova, @@ > > -1054,21 +1054,22 @@ static inline int iommu_sva_get_pasid(struct > > iommu_sva *handle) return IOMMU_PASID_INVALID; } > > > > -static inline int > > -iommu_cache_invalidate(struct iommu_domain *domain, > > - struct device *dev, > > - struct iommu_cache_invalidate_info > > *inv_info) +static inline int iommu_uapi_cache_invalidate(struct > > iommu_domain *domain, > > + struct device *dev, > > + struct > > iommu_cache_invalidate_info *inv_info) { > > return -ENODEV; > > } > > -static inline int iommu_sva_bind_gpasid(struct iommu_domain > > *domain, > > - struct device *dev, struct > > iommu_gpasid_bind_data *data) + > > +static inline int iommu_uapi_sva_bind_gpasid(struct iommu_domain > > *domain, > > + struct device *dev, > > + struct > > iommu_gpasid_bind_data *data) { > > return -ENODEV; > > } > > > > -static inline int iommu_sva_unbind_gpasid(struct iommu_domain > > *domain, > > - struct device *dev, int > > pasid) +static inline int iommu_uapi_sva_unbind_gpasid(struct > > iommu_domain *domain, > > + struct device *dev, > > int pasid) { > > return -ENODEV; > > } > > > [Jacob Pan] _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2020-08-17 23:09 UTC|newest] Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-07-30 0:21 [PATCH v7 0/7] IOMMU user API enhancement Jacob Pan 2020-07-30 0:21 ` Jacob Pan 2020-07-30 0:21 ` [PATCH v7 1/7] docs: IOMMU user API Jacob Pan 2020-07-30 0:21 ` Jacob Pan 2020-08-12 16:38 ` Auger Eric 2020-08-12 16:38 ` Auger Eric 2020-08-17 22:07 ` Jacob Pan 2020-08-17 22:07 ` Jacob Pan 2020-07-30 0:21 ` [PATCH v7 2/7] iommu/uapi: Add argsz for user filled data Jacob Pan 2020-07-30 0:21 ` Jacob Pan 2020-08-12 16:59 ` Auger Eric 2020-08-12 16:59 ` Auger Eric 2020-08-17 22:48 ` Jacob Pan 2020-08-17 22:48 ` Jacob Pan 2020-07-30 0:21 ` [PATCH v7 3/7] iommu/uapi: Introduce enum type for PASID data format Jacob Pan 2020-07-30 0:21 ` Jacob Pan 2020-08-13 9:29 ` Auger Eric 2020-08-13 9:29 ` Auger Eric 2020-07-30 0:21 ` [PATCH v7 4/7] iommu/uapi: Use named union for user data Jacob Pan 2020-07-30 0:21 ` Jacob Pan 2020-07-30 0:21 ` [PATCH v7 5/7] iommu/uapi: Rename uapi functions Jacob Pan 2020-07-30 0:21 ` Jacob Pan 2020-08-13 8:58 ` Auger Eric 2020-08-13 8:58 ` Auger Eric 2020-08-17 23:16 ` Jacob Pan [this message] 2020-08-17 23:16 ` Jacob Pan 2020-07-30 0:21 ` [PATCH v7 6/7] iommu/uapi: Handle data and argsz filled by users Jacob Pan 2020-07-30 0:21 ` Jacob Pan 2020-08-13 9:11 ` Auger Eric 2020-08-13 9:11 ` Auger Eric 2020-08-13 9:25 ` Liu, Yi L 2020-08-13 9:25 ` Liu, Yi L 2020-08-13 9:30 ` Auger Eric 2020-08-13 9:30 ` Auger Eric 2020-08-13 9:38 ` Liu, Yi L 2020-08-13 9:38 ` Liu, Yi L 2020-08-13 10:03 ` Auger Eric 2020-08-13 10:03 ` Auger Eric 2020-07-30 0:21 ` [PATCH v7 7/7] iommu/vt-d: Check UAPI data processed by IOMMU core Jacob Pan 2020-07-30 0:21 ` Jacob Pan 2020-08-13 9:19 ` Auger Eric 2020-08-13 9:19 ` Auger Eric 2020-08-31 17:52 ` Jacob Pan 2020-08-31 17:52 ` Jacob Pan
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