diff --git a/hw/xen/xen-bus.c b/hw/xen/xen-bus.c index d0b1ae93da..b247e86f28 100644 --- a/hw/xen/xen-bus.c +++ b/hw/xen/xen-bus.c @@ -947,7 +947,7 @@ static void xen_device_frontend_destroy(XenDevice *xendev) void xen_device_set_max_grant_refs(XenDevice *xendev, unsigned int nr_refs, Error **errp) { - if (xengnttab_set_max_grants(xendev->xgth, nr_refs)) { + if (qemu_xen_gnttab_set_max_grants(xendev->xgth, nr_refs)) { error_setg_errno(errp, errno, "xengnttab_set_max_grants failed"); } } @@ -956,9 +956,8 @@ void *xen_device_map_grant_refs(XenDevice *xendev, uint32_t *refs, unsigned int nr_refs, int prot, Error **errp) { - void *map = xengnttab_map_domain_grant_refs(xendev->xgth, nr_refs, - xendev->frontend_id, refs, - prot); + void *map = qemu_xen_gnttab_map_refs(xendev->xgth, nr_refs, + xendev->frontend_id, refs, prot); if (!map) { error_setg_errno(errp, errno, @@ -971,109 +970,17 @@ void *xen_device_map_grant_refs(XenDevice *xendev, uint32_t *refs, void xen_device_unmap_grant_refs(XenDevice *xendev, void *map, unsigned int nr_refs, Error **errp) { - if (xengnttab_unmap(xendev->xgth, map, nr_refs)) { + if (qemu_xen_gnttab_unmap(xendev->xgth, map, nr_refs)) { error_setg_errno(errp, errno, "xengnttab_unmap failed"); } } -static void compat_copy_grant_refs(XenDevice *xendev, bool to_domain, - XenDeviceGrantCopySegment segs[], - unsigned int nr_segs, Error **errp) -{ - uint32_t *refs = g_new(uint32_t, nr_segs); - int prot = to_domain ? PROT_WRITE : PROT_READ; - void *map; - unsigned int i; - - for (i = 0; i < nr_segs; i++) { - XenDeviceGrantCopySegment *seg = &segs[i]; - - refs[i] = to_domain ? seg->dest.foreign.ref : - seg->source.foreign.ref; - } - - map = xengnttab_map_domain_grant_refs(xendev->xgth, nr_segs, - xendev->frontend_id, refs, - prot); - if (!map) { - error_setg_errno(errp, errno, - "xengnttab_map_domain_grant_refs failed"); - goto done; - } - - for (i = 0; i < nr_segs; i++) { - XenDeviceGrantCopySegment *seg = &segs[i]; - void *page = map + (i * XC_PAGE_SIZE); - - if (to_domain) { - memcpy(page + seg->dest.foreign.offset, seg->source.virt, - seg->len); - } else { - memcpy(seg->dest.virt, page + seg->source.foreign.offset, - seg->len); - } - } - - if (xengnttab_unmap(xendev->xgth, map, nr_segs)) { - error_setg_errno(errp, errno, "xengnttab_unmap failed"); - } - -done: - g_free(refs); -} - void xen_device_copy_grant_refs(XenDevice *xendev, bool to_domain, XenDeviceGrantCopySegment segs[], unsigned int nr_segs, Error **errp) { - xengnttab_grant_copy_segment_t *xengnttab_segs; - unsigned int i; - - if (!xendev->feature_grant_copy) { - compat_copy_grant_refs(xendev, to_domain, segs, nr_segs, errp); - return; - } - - xengnttab_segs = g_new0(xengnttab_grant_copy_segment_t, nr_segs); - - for (i = 0; i < nr_segs; i++) { - XenDeviceGrantCopySegment *seg = &segs[i]; - xengnttab_grant_copy_segment_t *xengnttab_seg = &xengnttab_segs[i]; - - if (to_domain) { - xengnttab_seg->flags = GNTCOPY_dest_gref; - xengnttab_seg->dest.foreign.domid = xendev->frontend_id; - xengnttab_seg->dest.foreign.ref = seg->dest.foreign.ref; - xengnttab_seg->dest.foreign.offset = seg->dest.foreign.offset; - xengnttab_seg->source.virt = seg->source.virt; - } else { - xengnttab_seg->flags = GNTCOPY_source_gref; - xengnttab_seg->source.foreign.domid = xendev->frontend_id; - xengnttab_seg->source.foreign.ref = seg->source.foreign.ref; - xengnttab_seg->source.foreign.offset = - seg->source.foreign.offset; - xengnttab_seg->dest.virt = seg->dest.virt; - } - - xengnttab_seg->len = seg->len; - } - - if (xengnttab_grant_copy(xendev->xgth, nr_segs, xengnttab_segs)) { - error_setg_errno(errp, errno, "xengnttab_grant_copy failed"); - goto done; - } - - for (i = 0; i < nr_segs; i++) { - xengnttab_grant_copy_segment_t *xengnttab_seg = &xengnttab_segs[i]; - - if (xengnttab_seg->status != GNTST_okay) { - error_setg(errp, "xengnttab_grant_copy seg[%u] failed", i); - break; - } - } - -done: - g_free(xengnttab_segs); + qemu_xen_gnttab_grant_copy(xendev->xgth, to_domain, xendev->frontend_id, + (XenGrantCopySegment *)segs, nr_segs, errp); } struct XenEventChannel { @@ -1235,7 +1142,7 @@ static void xen_device_unrealize(DeviceState *dev) xen_device_backend_destroy(xendev); if (xendev->xgth) { - xengnttab_close(xendev->xgth); + qemu_xen_gnttab_close(xendev->xgth); xendev->xgth = NULL; } @@ -1298,15 +1205,12 @@ static void xen_device_realize(DeviceState *dev, Error **errp) xendev->watch_list = watch_list_create(xendev->xsh); - xendev->xgth = xengnttab_open(NULL, 0); + xendev->xgth = qemu_xen_gnttab_open(); if (!xendev->xgth) { error_setg_errno(errp, errno, "failed xengnttab_open"); goto unrealize; } - xendev->feature_grant_copy = - (xengnttab_grant_copy(xendev->xgth, 0, NULL) == 0); - xen_device_backend_create(xendev, errp); if (*errp) { goto unrealize; diff --git a/hw/xen/xen-legacy-backend.c b/hw/xen/xen-legacy-backend.c index 9ce3dc204b..1e9a28f263 100644 --- a/hw/xen/xen-legacy-backend.c +++ b/hw/xen/xen-legacy-backend.c @@ -43,7 +43,6 @@ struct xs_handle *xenstore; const char *xen_protocol; /* private */ -static bool xen_feature_grant_copy; static int debug; int xenstore_write_be_str(struct XenLegacyDevice *xendev, const char *node, @@ -113,7 +112,7 @@ void xen_be_set_max_grant_refs(struct XenLegacyDevice *xendev, { assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV); - if (xengnttab_set_max_grants(xendev->gnttabdev, nr_refs)) { + if (qemu_xen_gnttab_set_max_grants(xendev->gnttabdev, nr_refs)) { xen_pv_printf(xendev, 0, "xengnttab_set_max_grants failed: %s\n", strerror(errno)); } @@ -126,8 +125,8 @@ void *xen_be_map_grant_refs(struct XenLegacyDevice *xendev, uint32_t *refs, assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV); - ptr = xengnttab_map_domain_grant_refs(xendev->gnttabdev, nr_refs, - xen_domid, refs, prot); + ptr = qemu_xen_gnttab_map_refs(xendev->gnttabdev, nr_refs, xen_domid, refs, + prot); if (!ptr) { xen_pv_printf(xendev, 0, "xengnttab_map_domain_grant_refs failed: %s\n", @@ -142,119 +141,27 @@ void xen_be_unmap_grant_refs(struct XenLegacyDevice *xendev, void *ptr, { assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV); - if (xengnttab_unmap(xendev->gnttabdev, ptr, nr_refs)) { + if (qemu_xen_gnttab_unmap(xendev->gnttabdev, ptr, nr_refs)) { xen_pv_printf(xendev, 0, "xengnttab_unmap failed: %s\n", strerror(errno)); } } -static int compat_copy_grant_refs(struct XenLegacyDevice *xendev, - bool to_domain, - XenGrantCopySegment segs[], - unsigned int nr_segs) -{ - uint32_t *refs = g_new(uint32_t, nr_segs); - int prot = to_domain ? PROT_WRITE : PROT_READ; - void *pages; - unsigned int i; - - for (i = 0; i < nr_segs; i++) { - XenGrantCopySegment *seg = &segs[i]; - - refs[i] = to_domain ? - seg->dest.foreign.ref : seg->source.foreign.ref; - } - - pages = xengnttab_map_domain_grant_refs(xendev->gnttabdev, nr_segs, - xen_domid, refs, prot); - if (!pages) { - xen_pv_printf(xendev, 0, - "xengnttab_map_domain_grant_refs failed: %s\n", - strerror(errno)); - g_free(refs); - return -1; - } - - for (i = 0; i < nr_segs; i++) { - XenGrantCopySegment *seg = &segs[i]; - void *page = pages + (i * XC_PAGE_SIZE); - - if (to_domain) { - memcpy(page + seg->dest.foreign.offset, seg->source.virt, - seg->len); - } else { - memcpy(seg->dest.virt, page + seg->source.foreign.offset, - seg->len); - } - } - - if (xengnttab_unmap(xendev->gnttabdev, pages, nr_segs)) { - xen_pv_printf(xendev, 0, "xengnttab_unmap failed: %s\n", - strerror(errno)); - } - - g_free(refs); - return 0; -} - int xen_be_copy_grant_refs(struct XenLegacyDevice *xendev, bool to_domain, XenGrantCopySegment segs[], unsigned int nr_segs) { - xengnttab_grant_copy_segment_t *xengnttab_segs; - unsigned int i; int rc; assert(xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV); - if (!xen_feature_grant_copy) { - return compat_copy_grant_refs(xendev, to_domain, segs, nr_segs); - } - - xengnttab_segs = g_new0(xengnttab_grant_copy_segment_t, nr_segs); - - for (i = 0; i < nr_segs; i++) { - XenGrantCopySegment *seg = &segs[i]; - xengnttab_grant_copy_segment_t *xengnttab_seg = &xengnttab_segs[i]; - - if (to_domain) { - xengnttab_seg->flags = GNTCOPY_dest_gref; - xengnttab_seg->dest.foreign.domid = xen_domid; - xengnttab_seg->dest.foreign.ref = seg->dest.foreign.ref; - xengnttab_seg->dest.foreign.offset = seg->dest.foreign.offset; - xengnttab_seg->source.virt = seg->source.virt; - } else { - xengnttab_seg->flags = GNTCOPY_source_gref; - xengnttab_seg->source.foreign.domid = xen_domid; - xengnttab_seg->source.foreign.ref = seg->source.foreign.ref; - xengnttab_seg->source.foreign.offset = - seg->source.foreign.offset; - xengnttab_seg->dest.virt = seg->dest.virt; - } - - xengnttab_seg->len = seg->len; - } - - rc = xengnttab_grant_copy(xendev->gnttabdev, nr_segs, xengnttab_segs); - + rc = qemu_xen_gnttab_grant_copy(xendev->gnttabdev, to_domain, xen_domid, + segs, nr_segs, NULL); if (rc) { - xen_pv_printf(xendev, 0, "xengnttab_copy failed: %s\n", - strerror(errno)); + xen_pv_printf(xendev, 0, "xengnttab_grant_copy failed: %s\n", + strerror(-rc)); } - - for (i = 0; i < nr_segs; i++) { - xengnttab_grant_copy_segment_t *xengnttab_seg = - &xengnttab_segs[i]; - - if (xengnttab_seg->status != GNTST_okay) { - xen_pv_printf(xendev, 0, "segment[%u] status: %d\n", i, - xengnttab_seg->status); - rc = -1; - } - } - - g_free(xengnttab_segs); return rc; } @@ -466,7 +373,7 @@ static int xen_be_try_initialise(struct XenLegacyDevice *xendev) } if (xendev->ops->flags & DEVOPS_FLAG_NEED_GNTDEV) { - xendev->gnttabdev = xengnttab_open(NULL, 0); + xendev->gnttabdev = qemu_xen_gnttab_open(); if (xendev->gnttabdev == NULL) { xen_pv_printf(NULL, 0, "can't open gnttab device\n"); return -1; @@ -524,7 +431,7 @@ static void xen_be_disconnect(struct XenLegacyDevice *xendev, xendev->ops->disconnect(xendev); } if (xendev->gnttabdev) { - xengnttab_close(xendev->gnttabdev); + qemu_xen_gnttab_close(xendev->gnttabdev); xendev->gnttabdev = NULL; } if (xendev->be_state != state) { @@ -687,8 +594,6 @@ static void xen_set_dynamic_sysbus(void) void xen_be_init(void) { - xengnttab_handle *gnttabdev; - xenstore = xs_daemon_open(); if (!xenstore) { xen_pv_printf(NULL, 0, "can't connect to xenstored\n"); @@ -697,19 +602,11 @@ void xen_be_init(void) qemu_set_fd_handler(xs_fileno(xenstore), xenstore_update, NULL, NULL); - if (xen_xc == NULL || xen_fmem == NULL) { + if (xen_evtchn_ops == NULL || xen_gnttab_ops == NULL) { xen_pv_printf(NULL, 0, "Xen operations not set up\n"); exit(1); } - gnttabdev = xengnttab_open(NULL, 0); - if (gnttabdev != NULL) { - if (xengnttab_grant_copy(gnttabdev, 0, NULL) == 0) { - xen_feature_grant_copy = true; - } - xengnttab_close(gnttabdev); - } - xen_sysdev = qdev_new(TYPE_XENSYSDEV); sysbus_realize_and_unref(SYS_BUS_DEVICE(xen_sysdev), &error_fatal); xen_sysbus = qbus_new(TYPE_XENSYSBUS, xen_sysdev, "xen-sysbus"); diff --git a/hw/xen/xen-operations.c b/hw/xen/xen-operations.c index 1a959d89e8..2e74a28965 100644 --- a/hw/xen/xen-operations.c +++ b/hw/xen/xen-operations.c @@ -21,6 +21,7 @@ * must be undefined before including xenctrl.h */ #undef XC_WANT_COMPAT_EVTCHN_API +#undef XC_WANT_COMPAT_GNTTAB_API #include @@ -43,12 +44,141 @@ typedef evtchn_port_or_error_t xenevtchn_port_or_error_t; #define xenevtchn_unmask(h, p) xc_evtchn_unmask(h, p) #define xenevtchn_unbind(h, p) xc_evtchn_unbind(h, p) +typedef xc_gnttab xengnttab_handle; + +#define xengnttab_open(l, f) xc_gnttab_open(l, f) +#define xengnttab_close(h) xc_gnttab_close(h) +#define xengnttab_set_max_grants(h, n) xc_gnttab_set_max_grants(h, n) +#define xengnttab_map_grant_ref(h, d, r, p) xc_gnttab_map_grant_ref(h, d, r, p) +#define xengnttab_unmap(h, a, n) xc_gnttab_munmap(h, a, n) +#define xengnttab_map_grant_refs(h, c, d, r, p) \ + xc_gnttab_map_grant_refs(h, c, d, r, p) +#define xengnttab_map_domain_grant_refs(h, c, d, r, p) \ + xc_gnttab_map_domain_grant_refs(h, c, d, r, p) + #else /* CONFIG_XEN_CTRL_INTERFACE_VERSION >= 40701 */ #include +#include #endif +/* Xen before 4.8 */ + +static int libxengnttab_fallback_grant_copy(xengnttab_handle *xgt, + bool to_domain, uint32_t domid, + XenGrantCopySegment segs[], + unsigned int nr_segs, Error **errp) +{ + uint32_t *refs = g_new(uint32_t, nr_segs); + int prot = to_domain ? PROT_WRITE : PROT_READ; + void *map; + unsigned int i; + int rc = 0; + + for (i = 0; i < nr_segs; i++) { + XenGrantCopySegment *seg = &segs[i]; + + refs[i] = to_domain ? seg->dest.foreign.ref : + seg->source.foreign.ref; + } + map = xengnttab_map_domain_grant_refs(xgt, nr_segs, domid, refs, prot); + if (!map) { + if (errp) { + error_setg_errno(errp, errno, + "xengnttab_map_domain_grant_refs failed"); + } + rc = -errno; + goto done; + } + + for (i = 0; i < nr_segs; i++) { + XenGrantCopySegment *seg = &segs[i]; + void *page = map + (i * XEN_PAGE_SIZE); + + if (to_domain) { + memcpy(page + seg->dest.foreign.offset, seg->source.virt, + seg->len); + } else { + memcpy(seg->dest.virt, page + seg->source.foreign.offset, + seg->len); + } + } + + if (xengnttab_unmap(xgt, map, nr_segs)) { + if (errp) { + error_setg_errno(errp, errno, "xengnttab_unmap failed"); + } + rc = -errno; + } + +done: + g_free(refs); + return rc; +} + +#if CONFIG_XEN_CTRL_INTERFACE_VERSION >= 40800 + +static int libxengnttab_backend_grant_copy(xengnttab_handle *xgt, + bool to_domain, uint32_t domid, + XenGrantCopySegment *segs, + uint32_t nr_segs, Error **errp) +{ + xengnttab_grant_copy_segment_t *xengnttab_segs; + unsigned int i; + int rc; + + xengnttab_segs = g_new0(xengnttab_grant_copy_segment_t, nr_segs); + + for (i = 0; i < nr_segs; i++) { + XenGrantCopySegment *seg = &segs[i]; + xengnttab_grant_copy_segment_t *xengnttab_seg = &xengnttab_segs[i]; + + if (to_domain) { + xengnttab_seg->flags = GNTCOPY_dest_gref; + xengnttab_seg->dest.foreign.domid = domid; + xengnttab_seg->dest.foreign.ref = seg->dest.foreign.ref; + xengnttab_seg->dest.foreign.offset = seg->dest.foreign.offset; + xengnttab_seg->source.virt = seg->source.virt; + } else { + xengnttab_seg->flags = GNTCOPY_source_gref; + xengnttab_seg->source.foreign.domid = domid; + xengnttab_seg->source.foreign.ref = seg->source.foreign.ref; + xengnttab_seg->source.foreign.offset = + seg->source.foreign.offset; + xengnttab_seg->dest.virt = seg->dest.virt; + } + + xengnttab_seg->len = seg->len; + } + + if (xengnttab_grant_copy(xgt, nr_segs, xengnttab_segs)) { + if (errp) { + error_setg_errno(errp, errno, "xengnttab_grant_copy failed"); + } + rc = -errno; + goto done; + } + + rc = 0; + for (i = 0; i < nr_segs; i++) { + xengnttab_grant_copy_segment_t *xengnttab_seg = &xengnttab_segs[i]; + + if (xengnttab_seg->status != GNTST_okay) { + if (errp) { + error_setg(errp, "xengnttab_grant_copy seg[%u] failed", i); + } + rc = -EIO; + break; + } + } + +done: + g_free(xengnttab_segs); + return rc; +} +#endif + static xenevtchn_handle *libxenevtchn_backend_open(void) { return xenevtchn_open(NULL, 0); @@ -65,7 +195,34 @@ struct evtchn_backend_ops libxenevtchn_backend_ops = { .pending = xenevtchn_pending, }; +static xengnttab_handle *libxengnttab_backend_open(void) +{ + return xengnttab_open(NULL, 0); +} + + +static struct gnttab_backend_ops libxengnttab_backend_ops = { + .features = XEN_GNTTAB_OP_FEATURE_MAP_MULTIPLE, + .open = libxengnttab_backend_open, + .close = xengnttab_close, + .grant_copy = libxengnttab_fallback_grant_copy, + .set_max_grants = xengnttab_set_max_grants, + .map_refs = xengnttab_map_domain_grant_refs, + .unmap = xengnttab_unmap, +}; + void setup_xen_backend_ops(void) { +#if CONFIG_XEN_CTRL_INTERFACE_VERSION >= 40800 + xengnttab_handle *xgt = xengnttab_open(NULL, 0); + + if (xgt) { + if (xengnttab_grant_copy(xgt, 0, NULL) == 0) { + libxengnttab_backend_ops.grant_copy = libxengnttab_backend_grant_copy; + } + xengnttab_close(xgt); + } +#endif xen_evtchn_ops = &libxenevtchn_backend_ops; + xen_gnttab_ops = &libxengnttab_backend_ops; } diff --git a/hw/xen/xen_pvdev.c b/hw/xen/xen_pvdev.c index 86a2c8e567..d8582cc74c 100644 --- a/hw/xen/xen_pvdev.c +++ b/hw/xen/xen_pvdev.c @@ -309,7 +309,7 @@ void xen_pv_del_xendev(struct XenLegacyDevice *xendev) qemu_xen_evtchn_close(xendev->evtchndev); } if (xendev->gnttabdev != NULL) { - xengnttab_close(xendev->gnttabdev); + qemu_xen_gnttab_close(xendev->gnttabdev); } QTAILQ_REMOVE(&xendevs, xendev, next); diff --git a/include/hw/xen/xen-bus.h b/include/hw/xen/xen-bus.h index e21b83796e..72d71d1eb7 100644 --- a/include/hw/xen/xen-bus.h +++ b/include/hw/xen/xen-bus.h @@ -9,7 +9,7 @@ #define HW_XEN_BUS_H #include "hw/xen/xen_backend_ops.h" -#include "hw/xen/xen_common.h" +#include "hw/xen/interface/io/xenbus.h" #include "hw/sysbus.h" #include "qemu/notify.h" #include "qom/object.h" @@ -33,7 +33,6 @@ struct XenDevice { bool backend_online; XenWatch *backend_online_watch; xengnttab_handle *xgth; - bool feature_grant_copy; bool inactive; QLIST_HEAD(, XenEventChannel) event_channels; QLIST_ENTRY(XenDevice) list; diff --git a/include/hw/xen/xen-legacy-backend.h b/include/hw/xen/xen-legacy-backend.h index 06985b1f03..eaf79cd221 100644 --- a/include/hw/xen/xen-legacy-backend.h +++ b/include/hw/xen/xen-legacy-backend.h @@ -1,8 +1,8 @@ #ifndef HW_XEN_LEGACY_BACKEND_H #define HW_XEN_LEGACY_BACKEND_H -#include "hw/xen/xen_common.h" #include "hw/xen/xen_backend_ops.h" +#include "hw/xen/interface/io/xenbus.h" #include "hw/xen/xen_pvdev.h" #include "net/net.h" #include "qom/object.h" @@ -54,17 +54,6 @@ void *xen_be_map_grant_refs(struct XenLegacyDevice *xendev, uint32_t *refs, void xen_be_unmap_grant_refs(struct XenLegacyDevice *xendev, void *ptr, unsigned int nr_refs); -typedef struct XenGrantCopySegment { - union { - void *virt; - struct { - uint32_t ref; - off_t offset; - } foreign; - } source, dest; - size_t len; -} XenGrantCopySegment; - int xen_be_copy_grant_refs(struct XenLegacyDevice *xendev, bool to_domain, XenGrantCopySegment segs[], unsigned int nr_segs); diff --git a/include/hw/xen/xen_backend_ops.h b/include/hw/xen/xen_backend_ops.h index 9605456e81..bb3333ab00 100644 --- a/include/hw/xen/xen_backend_ops.h +++ b/include/hw/xen/xen_backend_ops.h @@ -29,6 +29,12 @@ typedef struct xenevtchn_handle xenevtchn_handle; typedef int xenevtchn_port_or_error_t; typedef uint32_t evtchn_port_t; +typedef uint16_t domid_t; +typedef uint32_t grant_ref_t; + +#define XEN_PAGE_SHIFT 12 +#define XEN_PAGE_SIZE (1UL << XEN_PAGE_SHIFT) +#define XEN_PAGE_MASK (~(XEN_PAGE_SIZE - 1)) struct evtchn_backend_ops { xenevtchn_handle *(*open)(void); @@ -113,6 +119,100 @@ static inline int qemu_xen_evtchn_pending(xenevtchn_handle *xc) return xen_evtchn_ops->pending(xc); } +typedef struct xengntdev_handle xengnttab_handle; + +typedef struct XenGrantCopySegment { + union { + void *virt; + struct { + uint32_t ref; + off_t offset; + } foreign; + } source, dest; + size_t len; +} XenGrantCopySegment; + +#define XEN_GNTTAB_OP_FEATURE_MAP_MULTIPLE (1U << 0) + +struct gnttab_backend_ops { + uint32_t features; + xengnttab_handle *(*open)(void); + int (*close)(xengnttab_handle *xgt); + int (*grant_copy)(xengnttab_handle *xgt, bool to_domain, uint32_t domid, + XenGrantCopySegment *segs, uint32_t nr_segs, + Error **errp); + int (*set_max_grants)(xengnttab_handle *xgt, uint32_t nr_grants); + void *(*map_refs)(xengnttab_handle *xgt, uint32_t count, uint32_t domid, + uint32_t *refs, int prot); + int (*unmap)(xengnttab_handle *xgt, void *start_address, uint32_t count); +}; + +extern struct gnttab_backend_ops *xen_gnttab_ops; + +static inline bool qemu_xen_gnttab_can_map_multi(void) +{ + return xen_gnttab_ops && + !!(xen_gnttab_ops->features & XEN_GNTTAB_OP_FEATURE_MAP_MULTIPLE); +} + +static inline xengnttab_handle *qemu_xen_gnttab_open(void) +{ + if (!xen_gnttab_ops) { + return NULL; + } + return xen_gnttab_ops->open(); +} + +static inline int qemu_xen_gnttab_close(xengnttab_handle *xgt) +{ + if (!xen_gnttab_ops) { + return -ENOSYS; + } + return xen_gnttab_ops->close(xgt); +} + +static inline int qemu_xen_gnttab_grant_copy(xengnttab_handle *xgt, + bool to_domain, uint32_t domid, + XenGrantCopySegment *segs, + uint32_t nr_segs, Error **errp) +{ + if (!xen_gnttab_ops) { + return -ENOSYS; + } + + return xen_gnttab_ops->grant_copy(xgt, to_domain, domid, segs, nr_segs, + errp); +} + +static inline int qemu_xen_gnttab_set_max_grants(xengnttab_handle *xgt, + uint32_t nr_grants) +{ + if (!xen_gnttab_ops) { + return -ENOSYS; + } + return xen_gnttab_ops->set_max_grants(xgt, nr_grants); +} + +static inline void *qemu_xen_gnttab_map_refs(xengnttab_handle *xgt, + uint32_t count, uint32_t domid, + uint32_t *refs, int prot) +{ + if (!xen_gnttab_ops) { + return NULL; + } + return xen_gnttab_ops->map_refs(xgt, count, domid, refs, prot); +} + +static inline int qemu_xen_gnttab_unmap(xengnttab_handle *xgt, + void *start_address, + uint32_t count) +{ + if (!xen_gnttab_ops) { + return -ENOSYS; + } + return xen_gnttab_ops->unmap(xgt, start_address, count); +} + void setup_xen_backend_ops(void); #endif /* QEMU_XEN_BACKEND_OPS_H */ diff --git a/include/hw/xen/xen_common.h b/include/hw/xen/xen_common.h index 34abd0a772..d4d10d3ff1 100644 --- a/include/hw/xen/xen_common.h +++ b/include/hw/xen/xen_common.h @@ -28,17 +28,6 @@ extern xc_interface *xen_xc; #if CONFIG_XEN_CTRL_INTERFACE_VERSION < 40701 typedef xc_interface xenforeignmemory_handle; -typedef xc_gnttab xengnttab_handle; - -#define xengnttab_open(l, f) xc_gnttab_open(l, f) -#define xengnttab_close(h) xc_gnttab_close(h) -#define xengnttab_set_max_grants(h, n) xc_gnttab_set_max_grants(h, n) -#define xengnttab_map_grant_ref(h, d, r, p) xc_gnttab_map_grant_ref(h, d, r, p) -#define xengnttab_unmap(h, a, n) xc_gnttab_munmap(h, a, n) -#define xengnttab_map_grant_refs(h, c, d, r, p) \ - xc_gnttab_map_grant_refs(h, c, d, r, p) -#define xengnttab_map_domain_grant_refs(h, c, d, r, p) \ - xc_gnttab_map_domain_grant_refs(h, c, d, r, p) #define xenforeignmemory_open(l, f) xen_xc #define xenforeignmemory_close(h) @@ -58,7 +47,6 @@ static inline void *xenforeignmemory_map(xc_interface *h, uint32_t dom, #else /* CONFIG_XEN_CTRL_INTERFACE_VERSION >= 40701 */ -#include #include #endif @@ -648,31 +636,4 @@ static inline int xen_set_ioreq_server_state(domid_t dom, #endif -/* Xen before 4.8 */ - -#if CONFIG_XEN_CTRL_INTERFACE_VERSION < 40800 - -struct xengnttab_grant_copy_segment { - union xengnttab_copy_ptr { - void *virt; - struct { - uint32_t ref; - uint16_t offset; - uint16_t domid; - } foreign; - } source, dest; - uint16_t len; - uint16_t flags; - int16_t status; -}; - -typedef struct xengnttab_grant_copy_segment xengnttab_grant_copy_segment_t; - -static inline int xengnttab_grant_copy(xengnttab_handle *xgt, uint32_t count, - xengnttab_grant_copy_segment_t *segs) -{ - return -ENOSYS; -} -#endif - #endif /* QEMU_HW_XEN_COMMON_H */ diff --git a/softmmu/globals.c b/softmmu/globals.c index eb62739be1..23bb27f0f6 100644 --- a/softmmu/globals.c +++ b/softmmu/globals.c @@ -66,3 +66,4 @@ uint32_t xen_domid; enum xen_mode xen_mode = XEN_DISABLED; bool xen_domid_restrict; struct evtchn_backend_ops *xen_evtchn_ops; +struct gnttab_backend_ops *xen_gnttab_ops;