search for: virtio_cwrite64

...++++++++++++ > 1 file changed, 45 insertions(+) > > diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h > index 26c155b..de05707 100644 > --- a/include/linux/virtio_config.h > +++ b/include/linux/virtio_config.h > @@ -414,4 +414,49 @@ static inline void virtio_cwrite64(struct virtio_device *vdev, > _r; \ > }) > > +static inline __le16 virtio_cread16_le(struct virtio_device *vdev, > + unsigned int offset) > +{ > + __le16 ret; > + > + vdev->config->get(vdev, offset, &ret, sizeof(ret)); > + return ret; > +}...

...++++++++++++ > 1 file changed, 45 insertions(+) > > diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h > index 26c155b..de05707 100644 > --- a/include/linux/virtio_config.h > +++ b/include/linux/virtio_config.h > @@ -414,4 +414,49 @@ static inline void virtio_cwrite64(struct virtio_device *vdev, > _r; \ > }) > > +static inline __le16 virtio_cread16_le(struct virtio_device *vdev, > + unsigned int offset) > +{ > + __le16 ret; > + > + vdev->config->get(vdev, offset, &ret, sizeof(ret)); > + return ret; > +}...

...t; > > > > diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h > > > index 26c155b..de05707 100644 > > > --- a/include/linux/virtio_config.h > > > +++ b/include/linux/virtio_config.h > > > @@ -414,4 +414,49 @@ static inline void virtio_cwrite64(struct virtio_device > > *vdev, > > > _r; \ > > > }) > > > > > > +static inline __le16 virtio_cread16_le(struct virtio_device *vdev, > > > + unsigned int offset) > > > +{ > > > + __le16 ret; > > > + > &g...

...t; > > > > diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h > > > index 26c155b..de05707 100644 > > > --- a/include/linux/virtio_config.h > > > +++ b/include/linux/virtio_config.h > > > @@ -414,4 +414,49 @@ static inline void virtio_cwrite64(struct virtio_device > > *vdev, > > > _r; \ > > > }) > > > > > > +static inline __le16 virtio_cread16_le(struct virtio_device *vdev, > > > + unsigned int offset) > > > +{ > > > + __le16 ret; > > > + > &g...

...v, VIRTIO_F_VERSION_1)) > return 0; > > diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h > index bb4cc4910750..3f4117adf311 100644 > --- a/include/linux/virtio_config.h > +++ b/include/linux/virtio_config.h > @@ -459,4 +459,5 @@ static inline void virtio_cwrite64(struct virtio_device *vdev, > _r; \ > }) > > +int arch_validate_virtio_features(struct virtio_device *dev); > #endif /* _LINUX_VIRTIO_CONFIG_H */ With the wording fixed, Reviewed-by: Cornelia Huck <cohuck at redhat.com>

...v, VIRTIO_F_VERSION_1)) > return 0; > > diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h > index bb4cc4910750..3f4117adf311 100644 > --- a/include/linux/virtio_config.h > +++ b/include/linux/virtio_config.h > @@ -459,4 +459,5 @@ static inline void virtio_cwrite64(struct virtio_device *vdev, > _r; \ > }) > > +int arch_validate_virtio_features(struct virtio_device *dev); > #endif /* _LINUX_VIRTIO_CONFIG_H */ With the wording fixed, Reviewed-by: Cornelia Huck <cohuck at redhat.com>

Hi all, The goal of the series is to give a chance to the architecture to validate VIRTIO device features. in this respin: 1) I kept removed the ack from Jason as I reworked the patch @Jason, the nature and goal of the patch did not really changed please can I get back your acked-by with these changes? 2) I suppressed the unnecessary verbosity of the architecture specific

Hi all, The goal of the series is to give a chance to the architecture to validate VIRTIO device features. in this respin: I use the original idea from Connie for an optional arch_has_restricted_memory_access. I renamed the callback accordingly, added the definition of ARCH_HAS_RESTRICTED_MEMORY_ACCESS inside the VIRTIO Kconfig and the selection in the PROTECTED_VIRTUALIZATION_GUEST config

Hi all, I changed the patch subject to reflect the content, becoming more general. 1) I removed the ack from Christian and Jason even far as I understand they gave it for the functionality more than for the implementation. @Jason, @Christian, please can I get back your acked-by with these changes? 2) previous patch had another name: [PATCH v3 0/1] s390: virtio: let arch choose to

...45 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index 26c155b..de05707 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -414,4 +414,49 @@ static inline void virtio_cwrite64(struct virtio_device *vdev, _r; \ }) +static inline __le16 virtio_cread16_le(struct virtio_device *vdev, + unsigned int offset) +{ + __le16 ret; + + vdev->config->get(vdev, offset, &ret, sizeof(ret)); + return ret; +} + +static inline void virtio_cwrite16_le(struct virtio...

...ret; + if (!virtio_has_feature(dev, VIRTIO_F_VERSION_1)) return 0; diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index bb4cc4910750..3f4117adf311 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -459,4 +459,5 @@ static inline void virtio_cwrite64(struct virtio_device *vdev, _r; \ }) +int arch_validate_virtio_features(struct virtio_device *dev); #endif /* _LINUX_VIRTIO_CONFIG_H */ -- 2.25.1

...ret; + if (!virtio_has_feature(dev, VIRTIO_F_VERSION_1)) return 0; diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index bb4cc4910750..3f4117adf311 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -459,4 +459,5 @@ static inline void virtio_cwrite64(struct virtio_device *vdev, _r; \ }) +int arch_validate_virtio_features(struct virtio_device *dev); #endif /* _LINUX_VIRTIO_CONFIG_H */ -- 2.25.1

...v, VIRTIO_F_VERSION_1)) > return 0; > > diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h > index bb4cc4910750..3f4117adf311 100644 > --- a/include/linux/virtio_config.h > +++ b/include/linux/virtio_config.h > @@ -459,4 +459,5 @@ static inline void virtio_cwrite64(struct virtio_device *vdev, > _r; \ > }) > > +int arch_validate_virtio_features(struct virtio_device *dev); > #endif /* _LINUX_VIRTIO_CONFIG_H */

...ret; + if (!virtio_has_feature(dev, VIRTIO_F_VERSION_1)) return 0; diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index bb4cc4910750..3f4117adf311 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -459,4 +459,5 @@ static inline void virtio_cwrite64(struct virtio_device *vdev, _r; \ }) +int arch_validate_virtio_features(struct virtio_device *dev); #endif /* _LINUX_VIRTIO_CONFIG_H */ -- 2.25.1

...ic inline u64 virtio_cread64(struct virtio_device *vdev, unsigned int offset) { - u64 ret; + __virtio64 ret; + __virtio_cread_many(vdev, offset, &ret, 1, sizeof(ret)); - return virtio64_to_cpu(vdev, (__force __virtio64)ret); + return virtio64_to_cpu(vdev, ret); } static inline void virtio_cwrite64(struct virtio_device *vdev, unsigned int offset, u64 val) { + __virtio64 v; + might_sleep(); - val = (__force u64)cpu_to_virtio64(vdev, val); - vdev->config->set(vdev, offset, &val, sizeof(val)); + v = cpu_to_virtio64(vdev, val); + vdev->config->set(vdev, offset, &v,...

...linux/virtio_config.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index 5b5196fec899..cc7a2b1fd7b2 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -555,4 +555,14 @@ static inline void virtio_cwrite64(struct virtio_device *vdev, _r; \ }) +/* Conditional config space accessors. */ +#define virtio_cread_le_feature(vdev, fbit, structname, member, ptr) \ + ({ \ + int _r = 0; \ + if (!virtio_has_feature(vdev, fbit)) \ + _r = -ENOENT; \ + else \ + virtio_cre...

...et; + if (!virtio_has_feature(dev, VIRTIO_F_VERSION_1)) return 0; diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index bb4cc4910750..f6b82541c497 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -459,4 +459,13 @@ static inline void virtio_cwrite64(struct virtio_device *vdev, _r; \ }) +#ifdef CONFIG_ARCH_HAS_RESTRICTED_MEMORY_ACCESS +int arch_has_restricted_memory_access(struct virtio_device *dev); +#else +static inline int arch_has_restricted_memory_access(struct virtio_device *dev) +{ + return 0; +} +#endif /* CONFIG_ARCH_HAS_R...

...+ } + if (!virtio_has_feature(dev, VIRTIO_F_VERSION_1)) return 0; diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index bb4cc4910750..e380664642b4 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -459,4 +459,13 @@ static inline void virtio_cwrite64(struct virtio_device *vdev, _r; \ }) +#ifdef CONFIG_ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS +int arch_has_restricted_virtio_memory_access(void); +#else +static inline int arch_has_restricted_virtio_memory_access(void) +{ + return 0; +} +#endif /* CONFIG_ARCH_HAS_RESTRICTED_VIRTIO_MEMO...

...+ } + if (!virtio_has_feature(dev, VIRTIO_F_VERSION_1)) return 0; diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index 8fe857e27ef3..3f697c8c8205 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -540,4 +540,14 @@ static inline void virtio_cwrite64(struct virtio_device *vdev, virtio_cread_le((vdev), structname, member, ptr); \ _r; \ }) + +#ifdef CONFIG_ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS +int arch_has_restricted_virtio_memory_access(void); +#else +static inline int arch_has_restricted_virtio_memory_access(void) +{ + return...

...+ } + if (!virtio_has_feature(dev, VIRTIO_F_VERSION_1)) return 0; diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h index 8fe857e27ef3..3f697c8c8205 100644 --- a/include/linux/virtio_config.h +++ b/include/linux/virtio_config.h @@ -540,4 +540,14 @@ static inline void virtio_cwrite64(struct virtio_device *vdev, virtio_cread_le((vdev), structname, member, ptr); \ _r; \ }) + +#ifdef CONFIG_ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS +int arch_has_restricted_virtio_memory_access(void); +#else +static inline int arch_has_restricted_virtio_memory_access(void) +{ + return...