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Message-Id: <20220208152520.52983-2-cristian.marussi@arm.com> Date: Tue, 8 Feb 2022 15:25:17 +0000 From: Cristian Marussi <cristian.marussi@....com> To: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, virtualization@...ts.linux-foundation.org Cc: sudeep.holla@....com, mst@...hat.com, vincent.guittot@...aro.org, souvik.chakravarty@....com, peter.hilber@...nsynergy.com, igor.skalkin@...nsynergy.com, cristian.marussi@....com Subject: [PATCH 1/4] tools/virtio: Miscellaneous build fixes - Fix pthread LDFLAGS in Makefile: use -pthread compile and link switch as per man-page; the current -lpthread emits a number of undefined refs: virtio_ring.o: In function `spin_lock': tools/virtio/./linux/spinlock.h:16: undefined reference to `pthread_spin_lock' virtio_ring.o: In function `spin_unlock': tools/virtio/./linux/spinlock.h:22: undefined reference to `pthread_spin_unlock' virtio_ring.o: In function `spin_lock': tools/virtio/./linux/spinlock.h:16: undefined reference to `pthread_spin_lock' virtio_ring.o: In function `spin_unlock': tools/virtio/./linux/spinlock.h:22: undefined reference to `pthread_spin_unlock' virtio_ring.o: In function `spin_lock': tools/virtio/./linux/spinlock.h:16: undefined reference to `pthread_spin_lock' virtio_ring.o: In function `spin_unlock': tools/virtio/./linux/spinlock.h:22: undefined reference to `pthread_spin_unlock' virtio_ring.o: In function `spin_lock': tools/virtio/./linux/spinlock.h:16: undefined reference to `pthread_spin_lock' virtio_ring.o: In function `spin_unlock': tools/virtio/./linux/spinlock.h:22: undefined reference to `pthread_spin_unlock' - Missing drv_to_virtio definition and related includes: a copy of uio.h with a helper, using a struct folio reference, removed. - Added empty mm_types.h - Added mocked moduleparam() definitions. - Fixed virtio_test and vringh_test initialization to allow drv_to_virtio inline to work properly when invoked from tets code. Signed-off-by: Cristian Marussi <cristian.marussi@....com> --- tools/virtio/Makefile | 2 +- tools/virtio/linux/mm_types.h | 3 + tools/virtio/linux/module.h | 1 + tools/virtio/linux/moduleparam.h | 7 + tools/virtio/linux/uio.h | 299 ++++++++++++++++++++++++++++++- tools/virtio/linux/virtio.h | 63 +++++++ tools/virtio/virtio_test.c | 3 + tools/virtio/vringh_test.c | 3 + 8 files changed, 379 insertions(+), 2 deletions(-) create mode 100644 tools/virtio/linux/mm_types.h create mode 100644 tools/virtio/linux/moduleparam.h diff --git a/tools/virtio/Makefile b/tools/virtio/Makefile index 0d7bbe49359d..83b6a522d0d2 100644 --- a/tools/virtio/Makefile +++ b/tools/virtio/Makefile @@ -5,7 +5,7 @@ virtio_test: virtio_ring.o virtio_test.o vringh_test: vringh_test.o vringh.o virtio_ring.o CFLAGS += -g -O2 -Werror -Wno-maybe-uninitialized -Wall -I. -I../include/ -I ../../usr/include/ -Wno-pointer-sign -fno-strict-overflow -fno-strict-aliasing -fno-common -MMD -U_FORTIFY_SOURCE -include ../../include/linux/kconfig.h -LDFLAGS += -lpthread +LDFLAGS += -pthread vpath %.c ../../drivers/virtio ../../drivers/vhost mod: ${MAKE} -C `pwd`/../.. M=`pwd`/vhost_test V=${V} diff --git a/tools/virtio/linux/mm_types.h b/tools/virtio/linux/mm_types.h new file mode 100644 index 000000000000..3f3b5a471a1e --- /dev/null +++ b/tools/virtio/linux/mm_types.h @@ -0,0 +1,3 @@ +#ifndef LINUX_MM_TYPES_H +#endif + diff --git a/tools/virtio/linux/module.h b/tools/virtio/linux/module.h index 9dfa96fea2b2..c81dcfe4bbfe 100644 --- a/tools/virtio/linux/module.h +++ b/tools/virtio/linux/module.h @@ -1,5 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0 */ #include <linux/export.h> +#include <linux/moduleparam.h> #define MODULE_LICENSE(__MODULE_LICENSE_value) \ static __attribute__((unused)) const char *__MODULE_LICENSE_name = \ diff --git a/tools/virtio/linux/moduleparam.h b/tools/virtio/linux/moduleparam.h new file mode 100644 index 000000000000..e1b14a39ddd3 --- /dev/null +++ b/tools/virtio/linux/moduleparam.h @@ -0,0 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _LINUX_MODULE_PARAMS_H +#define _LINUX_MODULE_PARAMS_H + +#define module_param(name, type, perm) + +#endif /* _LINUX_MODULE_PARAMS_H */ diff --git a/tools/virtio/linux/uio.h b/tools/virtio/linux/uio.h index cd20f0ba3081..b2fba0288409 100644 --- a/tools/virtio/linux/uio.h +++ b/tools/virtio/linux/uio.h @@ -1,3 +1,300 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#ifndef __LINUX_UIO_H +#define __LINUX_UIO_H + #include <linux/kernel.h> +#include <linux/thread_info.h> +#include <linux/mm_types.h> +#include <uapi/linux/uio.h> + +struct page; +struct pipe_inode_info; + +struct kvec { + void *iov_base; /* and that should *never* hold a userland pointer */ + size_t iov_len; +}; + +enum iter_type { + /* iter types */ + ITER_IOVEC, + ITER_KVEC, + ITER_BVEC, + ITER_PIPE, + ITER_XARRAY, + ITER_DISCARD, +}; + +struct iov_iter_state { + size_t iov_offset; + size_t count; + unsigned long nr_segs; +}; + +struct iov_iter { + u8 iter_type; + bool nofault; + bool data_source; + size_t iov_offset; + size_t count; + union { + const struct iovec *iov; + const struct kvec *kvec; + const struct bio_vec *bvec; + struct xarray *xarray; + struct pipe_inode_info *pipe; + }; + union { + unsigned long nr_segs; + struct { + unsigned int head; + unsigned int start_head; + }; + loff_t xarray_start; + }; +}; + +static inline enum iter_type iov_iter_type(const struct iov_iter *i) +{ + return i->iter_type; +} + +static inline void iov_iter_save_state(struct iov_iter *iter, + struct iov_iter_state *state) +{ + state->iov_offset = iter->iov_offset; + state->count = iter->count; + state->nr_segs = iter->nr_segs; +} + +static inline bool iter_is_iovec(const struct iov_iter *i) +{ + return iov_iter_type(i) == ITER_IOVEC; +} + +static inline bool iov_iter_is_kvec(const struct iov_iter *i) +{ + return iov_iter_type(i) == ITER_KVEC; +} + +static inline bool iov_iter_is_bvec(const struct iov_iter *i) +{ + return iov_iter_type(i) == ITER_BVEC; +} + +static inline bool iov_iter_is_pipe(const struct iov_iter *i) +{ + return iov_iter_type(i) == ITER_PIPE; +} + +static inline bool iov_iter_is_discard(const struct iov_iter *i) +{ + return iov_iter_type(i) == ITER_DISCARD; +} + +static inline bool iov_iter_is_xarray(const struct iov_iter *i) +{ + return iov_iter_type(i) == ITER_XARRAY; +} + +static inline unsigned char iov_iter_rw(const struct iov_iter *i) +{ + return i->data_source ? WRITE : READ; +} + +/* + * Total number of bytes covered by an iovec. + * + * NOTE that it is not safe to use this function until all the iovec's + * segment lengths have been validated. Because the individual lengths can + * overflow a size_t when added together. + */ +static inline size_t iov_length(const struct iovec *iov, unsigned long nr_segs) +{ + unsigned long seg; + size_t ret = 0; + + for (seg = 0; seg < nr_segs; seg++) + ret += iov[seg].iov_len; + return ret; +} + +static inline struct iovec iov_iter_iovec(const struct iov_iter *iter) +{ + return (struct iovec) { + .iov_base = iter->iov->iov_base + iter->iov_offset, + .iov_len = min(iter->count, + iter->iov->iov_len - iter->iov_offset), + }; +} + +size_t copy_page_from_iter_atomic(struct page *page, unsigned offset, + size_t bytes, struct iov_iter *i); +void iov_iter_advance(struct iov_iter *i, size_t bytes); +void iov_iter_revert(struct iov_iter *i, size_t bytes); +size_t fault_in_iov_iter_readable(const struct iov_iter *i, size_t bytes); +size_t fault_in_iov_iter_writeable(const struct iov_iter *i, size_t bytes); +size_t iov_iter_single_seg_count(const struct iov_iter *i); +size_t copy_page_to_iter(struct page *page, size_t offset, size_t bytes, + struct iov_iter *i); +size_t copy_page_from_iter(struct page *page, size_t offset, size_t bytes, + struct iov_iter *i); + +size_t _copy_to_iter(const void *addr, size_t bytes, struct iov_iter *i); +size_t _copy_from_iter(void *addr, size_t bytes, struct iov_iter *i); +size_t _copy_from_iter_nocache(void *addr, size_t bytes, struct iov_iter *i); + +static __always_inline __must_check +size_t copy_to_iter(const void *addr, size_t bytes, struct iov_iter *i) +{ + if (unlikely(!check_copy_size(addr, bytes, true))) + return 0; + else + return _copy_to_iter(addr, bytes, i); +} + +static __always_inline __must_check +size_t copy_from_iter(void *addr, size_t bytes, struct iov_iter *i) +{ + if (unlikely(!check_copy_size(addr, bytes, false))) + return 0; + else + return _copy_from_iter(addr, bytes, i); +} + +static __always_inline __must_check +bool copy_from_iter_full(void *addr, size_t bytes, struct iov_iter *i) +{ + size_t copied = copy_from_iter(addr, bytes, i); + if (likely(copied == bytes)) + return true; + iov_iter_revert(i, copied); + return false; +} + +static __always_inline __must_check +size_t copy_from_iter_nocache(void *addr, size_t bytes, struct iov_iter *i) +{ + if (unlikely(!check_copy_size(addr, bytes, false))) + return 0; + else + return _copy_from_iter_nocache(addr, bytes, i); +} + +static __always_inline __must_check +bool copy_from_iter_full_nocache(void *addr, size_t bytes, struct iov_iter *i) +{ + size_t copied = copy_from_iter_nocache(addr, bytes, i); + if (likely(copied == bytes)) + return true; + iov_iter_revert(i, copied); + return false; +} + +#ifdef CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE +/* + * Note, users like pmem that depend on the stricter semantics of + * _copy_from_iter_flushcache() than _copy_from_iter_nocache() must check for + * IS_ENABLED(CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE) before assuming that the + * destination is flushed from the cache on return. + */ +size_t _copy_from_iter_flushcache(void *addr, size_t bytes, struct iov_iter *i); +#else +#define _copy_from_iter_flushcache _copy_from_iter_nocache +#endif + +#ifdef CONFIG_ARCH_HAS_COPY_MC +size_t _copy_mc_to_iter(const void *addr, size_t bytes, struct iov_iter *i); +#else +#define _copy_mc_to_iter _copy_to_iter +#endif + +size_t iov_iter_zero(size_t bytes, struct iov_iter *); +unsigned long iov_iter_alignment(const struct iov_iter *i); +unsigned long iov_iter_gap_alignment(const struct iov_iter *i); +void iov_iter_init(struct iov_iter *i, unsigned int direction, const struct iovec *iov, + unsigned long nr_segs, size_t count); +void iov_iter_kvec(struct iov_iter *i, unsigned int direction, const struct kvec *kvec, + unsigned long nr_segs, size_t count); +void iov_iter_bvec(struct iov_iter *i, unsigned int direction, const struct bio_vec *bvec, + unsigned long nr_segs, size_t count); +void iov_iter_pipe(struct iov_iter *i, unsigned int direction, struct pipe_inode_info *pipe, + size_t count); +void iov_iter_discard(struct iov_iter *i, unsigned int direction, size_t count); +void iov_iter_xarray(struct iov_iter *i, unsigned int direction, struct xarray *xarray, + loff_t start, size_t count); +ssize_t iov_iter_get_pages(struct iov_iter *i, struct page **pages, + size_t maxsize, unsigned maxpages, size_t *start); +ssize_t iov_iter_get_pages_alloc(struct iov_iter *i, struct page ***pages, + size_t maxsize, size_t *start); +int iov_iter_npages(const struct iov_iter *i, int maxpages); +void iov_iter_restore(struct iov_iter *i, struct iov_iter_state *state); + +const void *dup_iter(struct iov_iter *new, struct iov_iter *old, gfp_t flags); + +static inline size_t iov_iter_count(const struct iov_iter *i) +{ + return i->count; +} + +/* + * Cap the iov_iter by given limit; note that the second argument is + * *not* the new size - it's upper limit for such. Passing it a value + * greater than the amount of data in iov_iter is fine - it'll just do + * nothing in that case. + */ +static inline void iov_iter_truncate(struct iov_iter *i, u64 count) +{ + /* + * count doesn't have to fit in size_t - comparison extends both + * operands to u64 here and any value that would be truncated by + * conversion in assignement is by definition greater than all + * values of size_t, including old i->count. + */ + if (i->count > count) + i->count = count; +} + +/* + * reexpand a previously truncated iterator; count must be no more than how much + * we had shrunk it. + */ +static inline void iov_iter_reexpand(struct iov_iter *i, size_t count) +{ + i->count = count; +} + +struct csum_state { + __wsum csum; + size_t off; +}; + +size_t csum_and_copy_to_iter(const void *addr, size_t bytes, void *csstate, struct iov_iter *i); +size_t csum_and_copy_from_iter(void *addr, size_t bytes, __wsum *csum, struct iov_iter *i); + +static __always_inline __must_check +bool csum_and_copy_from_iter_full(void *addr, size_t bytes, + __wsum *csum, struct iov_iter *i) +{ + size_t copied = csum_and_copy_from_iter(addr, bytes, csum, i); + if (likely(copied == bytes)) + return true; + iov_iter_revert(i, copied); + return false; +} +size_t hash_and_copy_to_iter(const void *addr, size_t bytes, void *hashp, + struct iov_iter *i); + +struct iovec *iovec_from_user(const struct iovec __user *uvector, + unsigned long nr_segs, unsigned long fast_segs, + struct iovec *fast_iov, bool compat); +ssize_t import_iovec(int type, const struct iovec __user *uvec, + unsigned nr_segs, unsigned fast_segs, struct iovec **iovp, + struct iov_iter *i); +ssize_t __import_iovec(int type, const struct iovec __user *uvec, + unsigned nr_segs, unsigned fast_segs, struct iovec **iovp, + struct iov_iter *i, bool compat); +int import_single_range(int type, void __user *buf, size_t len, + struct iovec *iov, struct iov_iter *i); -#include "../../../include/linux/uio.h" +#endif diff --git a/tools/virtio/linux/virtio.h b/tools/virtio/linux/virtio.h index 363b98228301..9021187a66d9 100644 --- a/tools/virtio/linux/virtio.h +++ b/tools/virtio/linux/virtio.h @@ -5,8 +5,47 @@ #include <linux/kernel.h> #include <linux/spinlock.h> +typedef struct pm_message { + int event; +} pm_message_t; + +enum probe_type { + PROBE_DEFAULT_STRATEGY, + PROBE_PREFER_ASYNCHRONOUS, + PROBE_FORCE_SYNCHRONOUS, +}; + +struct device_driver { + const char *name; + void *bus; + + void *owner; + const char *mod_name; /* used for built-in modules */ + + bool suppress_bind_attrs; /* disables bind/unbind via sysfs */ + enum probe_type probe_type; + + const void *of_match_table; + const void *acpi_match_table; + + int (*probe)(void *dev); + void (*sync_state)(void *dev); + int (*remove)(void *dev); + void (*shutdown)(void *dev); + int (*suspend)(void *dev, pm_message_t state); + int (*resume)(void *dev); + const void **groups; + const void **dev_groups; + + const void *pm; + void (*coredump)(void *dev); + + struct driver_private *p; +}; + struct device { void *parent; + struct device_driver *driver; }; struct virtio_device { @@ -26,6 +65,25 @@ struct virtqueue { void *priv; }; +struct virtio_driver { + struct device_driver driver; + const struct virtio_device_id *id_table; + const unsigned int *feature_table; + unsigned int feature_table_size; + const unsigned int *feature_table_legacy; + unsigned int feature_table_size_legacy; + bool suppress_used_validation; + int (*validate)(struct virtio_device *dev); + int (*probe)(struct virtio_device *dev); + void (*scan)(struct virtio_device *dev); + void (*remove)(struct virtio_device *dev); + void (*config_changed)(struct virtio_device *dev); +#ifdef CONFIG_PM + int (*freeze)(struct virtio_device *dev); + int (*restore)(struct virtio_device *dev); +#endif +}; + /* Interfaces exported by virtio_ring. */ int virtqueue_add_sgs(struct virtqueue *vq, struct scatterlist *sgs[], @@ -66,4 +124,9 @@ struct virtqueue *vring_new_virtqueue(unsigned int index, const char *name); void vring_del_virtqueue(struct virtqueue *vq); +static inline struct virtio_driver *drv_to_virtio(struct device_driver *drv) +{ + return container_of(drv, struct virtio_driver, driver); +} + #endif diff --git a/tools/virtio/virtio_test.c b/tools/virtio/virtio_test.c index cb3f29c09aff..d882075c097f 100644 --- a/tools/virtio/virtio_test.c +++ b/tools/virtio/virtio_test.c @@ -36,6 +36,7 @@ struct vq_info { }; struct vdev_info { + struct virtio_driver vdriver; struct virtio_device vdev; int control; struct pollfd fds[1]; @@ -128,6 +129,8 @@ static void vdev_info_init(struct vdev_info* dev, unsigned long long features) { int r; memset(dev, 0, sizeof *dev); + dev->vdriver.suppress_used_validation = false; + dev->vdev.dev.driver = &dev->vdriver.driver; dev->vdev.features = features; INIT_LIST_HEAD(&dev->vdev.vqs); dev->buf_size = 1024; diff --git a/tools/virtio/vringh_test.c b/tools/virtio/vringh_test.c index fa87b58bd5fa..dbecfbbcbe54 100644 --- a/tools/virtio/vringh_test.c +++ b/tools/virtio/vringh_test.c @@ -437,6 +437,7 @@ static int parallel_test(u64 features, int main(int argc, char *argv[]) { + struct virtio_driver vdriver; struct virtio_device vdev; struct virtqueue *vq; struct vringh vrh; @@ -453,6 +454,8 @@ int main(int argc, char *argv[]) bool fast_vringh = false, parallel = false; getrange = getrange_iov; + vdriver.suppress_used_validation = false; + vdev.dev.driver = &vdriver.driver; vdev.features = 0; INIT_LIST_HEAD(&vdev.vqs); -- 2.17.1
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