diff options
| author | Paul Durrant <pdurrant@amazon.com> | 2023-01-02 11:05:16 +0000 |
|---|---|---|
| committer | David Woodhouse <dwmw@amazon.co.uk> | 2023-03-07 17:04:30 +0000 |
| commit | ba2a92db1ff682c16730b1d7f156bac61928f04d (patch) | |
| tree | dde2437fc696530e24735ca05cdbd84e4fbf5bb2 /include/hw/xen/xen_backend_ops.h | |
| parent | 15e283c5b684c2e502e9327186eb89eb69c68812 (diff) | |
hw/xen: Add xenstore operations to allow redirection to internal emulation
Signed-off-by: Paul Durrant <pdurrant@amazon.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
Diffstat (limited to 'include/hw/xen/xen_backend_ops.h')
| -rw-r--r-- | include/hw/xen/xen_backend_ops.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/include/hw/xen/xen_backend_ops.h b/include/hw/xen/xen_backend_ops.h index 0dff06bbde..90cca85f52 100644 --- a/include/hw/xen/xen_backend_ops.h +++ b/include/hw/xen/xen_backend_ops.h @@ -12,6 +12,10 @@ #ifndef QEMU_XEN_BACKEND_OPS_H #define QEMU_XEN_BACKEND_OPS_H +#include "hw/xen/xen.h" +#include "hw/xen/interface/xen.h" +#include "hw/xen/interface/io/xenbus.h" + /* * For the time being, these operations map fairly closely to the API of * the actual Xen libraries, e.g. libxenevtchn. As we complete the migration @@ -36,6 +40,16 @@ typedef uint32_t grant_ref_t; #define XEN_PAGE_SIZE (1UL << XEN_PAGE_SHIFT) #define XEN_PAGE_MASK (~(XEN_PAGE_SIZE - 1)) +#ifndef xen_rmb +#define xen_rmb() smp_rmb() +#endif +#ifndef xen_wmb +#define xen_wmb() smp_wmb() +#endif +#ifndef xen_mb +#define xen_mb() smp_mb() +#endif + struct evtchn_backend_ops { xenevtchn_handle *(*open)(void); int (*bind_interdomain)(xenevtchn_handle *xc, uint32_t domid, @@ -240,6 +254,155 @@ static inline int qemu_xen_foreignmem_unmap(void *addr, size_t pages) return xen_foreignmem_ops->unmap(addr, pages); } +typedef void (*xs_watch_fn)(void *opaque, const char *path); + +struct qemu_xs_handle; +struct qemu_xs_watch; +typedef uint32_t xs_transaction_t; + +#define XBT_NULL 0 + +#define XS_PERM_NONE 0x00 +#define XS_PERM_READ 0x01 +#define XS_PERM_WRITE 0x02 + +struct xenstore_backend_ops { + struct qemu_xs_handle *(*open)(void); + void (*close)(struct qemu_xs_handle *h); + char *(*get_domain_path)(struct qemu_xs_handle *h, unsigned int domid); + char **(*directory)(struct qemu_xs_handle *h, xs_transaction_t t, + const char *path, unsigned int *num); + void *(*read)(struct qemu_xs_handle *h, xs_transaction_t t, + const char *path, unsigned int *len); + bool (*write)(struct qemu_xs_handle *h, xs_transaction_t t, + const char *path, const void *data, unsigned int len); + bool (*create)(struct qemu_xs_handle *h, xs_transaction_t t, + unsigned int owner, unsigned int domid, + unsigned int perms, const char *path); + bool (*destroy)(struct qemu_xs_handle *h, xs_transaction_t t, + const char *path); + struct qemu_xs_watch *(*watch)(struct qemu_xs_handle *h, const char *path, + xs_watch_fn fn, void *opaque); + void (*unwatch)(struct qemu_xs_handle *h, struct qemu_xs_watch *w); + xs_transaction_t (*transaction_start)(struct qemu_xs_handle *h); + bool (*transaction_end)(struct qemu_xs_handle *h, xs_transaction_t t, + bool abort); +}; + +extern struct xenstore_backend_ops *xen_xenstore_ops; + +static inline struct qemu_xs_handle *qemu_xen_xs_open(void) +{ + if (!xen_xenstore_ops) { + return NULL; + } + return xen_xenstore_ops->open(); +} + +static inline void qemu_xen_xs_close(struct qemu_xs_handle *h) +{ + if (!xen_xenstore_ops) { + return; + } + xen_xenstore_ops->close(h); +} + +static inline char *qemu_xen_xs_get_domain_path(struct qemu_xs_handle *h, + unsigned int domid) +{ + if (!xen_xenstore_ops) { + return NULL; + } + return xen_xenstore_ops->get_domain_path(h, domid); +} + +static inline char **qemu_xen_xs_directory(struct qemu_xs_handle *h, + xs_transaction_t t, const char *path, + unsigned int *num) +{ + if (!xen_xenstore_ops) { + return NULL; + } + return xen_xenstore_ops->directory(h, t, path, num); +} + +static inline void *qemu_xen_xs_read(struct qemu_xs_handle *h, + xs_transaction_t t, const char *path, + unsigned int *len) +{ + if (!xen_xenstore_ops) { + return NULL; + } + return xen_xenstore_ops->read(h, t, path, len); +} + +static inline bool qemu_xen_xs_write(struct qemu_xs_handle *h, + xs_transaction_t t, const char *path, + const void *data, unsigned int len) +{ + if (!xen_xenstore_ops) { + return false; + } + return xen_xenstore_ops->write(h, t, path, data, len); +} + +static inline bool qemu_xen_xs_create(struct qemu_xs_handle *h, + xs_transaction_t t, unsigned int owner, + unsigned int domid, unsigned int perms, + const char *path) +{ + if (!xen_xenstore_ops) { + return false; + } + return xen_xenstore_ops->create(h, t, owner, domid, perms, path); +} + +static inline bool qemu_xen_xs_destroy(struct qemu_xs_handle *h, + xs_transaction_t t, const char *path) +{ + if (!xen_xenstore_ops) { + return false; + } + return xen_xenstore_ops->destroy(h, t, path); +} + +static inline struct qemu_xs_watch *qemu_xen_xs_watch(struct qemu_xs_handle *h, + const char *path, + xs_watch_fn fn, + void *opaque) +{ + if (!xen_xenstore_ops) { + return NULL; + } + return xen_xenstore_ops->watch(h, path, fn, opaque); +} + +static inline void qemu_xen_xs_unwatch(struct qemu_xs_handle *h, + struct qemu_xs_watch *w) +{ + if (!xen_xenstore_ops) { + return; + } + xen_xenstore_ops->unwatch(h, w); +} + +static inline xs_transaction_t qemu_xen_xs_transaction_start(struct qemu_xs_handle *h) +{ + if (!xen_xenstore_ops) { + return XBT_NULL; + } + return xen_xenstore_ops->transaction_start(h); +} + +static inline bool qemu_xen_xs_transaction_end(struct qemu_xs_handle *h, + xs_transaction_t t, bool abort) +{ + if (!xen_xenstore_ops) { + return false; + } + return xen_xenstore_ops->transaction_end(h, t, abort); +} + void setup_xen_backend_ops(void); #endif /* QEMU_XEN_BACKEND_OPS_H */ |