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authorLinus Torvalds <torvalds@linux-foundation.org>2016-01-12 13:05:36 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2016-01-12 13:05:36 -0800
commitc9bed1cf51011c815d88288b774865d013ca78a8 (patch)
tree77e205b9442338a3d11567d4abcdb8df616979cf /include/uapi
parent75777c1855e10c010c9c3a21611d95dd9be01ab1 (diff)
parenta4cdb556cae05cd3e7b602b3a44c01420c4e2258 (diff)
downloadlinux-c9bed1cf51011c815d88288b774865d013ca78a8.tar.bz2
Merge tag 'for-linus-4.5-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen updates from David Vrabel: "Xen features and fixes for 4.5-rc0: - Stolen ticks and PV wallclock support for arm/arm64 - Add grant copy ioctl to gntdev device" * tag 'for-linus-4.5-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen/gntdev: add ioctl for grant copy x86/xen: don't reset vcpu_info on a cancelled suspend xen/gntdev: constify mmu_notifier_ops structures xen/grant-table: constify gnttab_ops structure xen/time: use READ_ONCE xen/x86: convert remaining timespec to timespec64 in xen_pvclock_gtod_notify xen/x86: support XENPF_settime64 xen/arm: set the system time in Xen via the XENPF_settime64 hypercall xen/arm: introduce xen_read_wallclock arm: extend pvclock_wall_clock with sec_hi xen: introduce XENPF_settime64 xen/arm: introduce HYPERVISOR_platform_op on arm and arm64 xen: rename dom0_op to platform_op xen/arm: account for stolen ticks arm64: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops arm: introduce CONFIG_PARAVIRT, PARAVIRT_TIME_ACCOUNTING and pv_time_ops missing include asm/paravirt.h in cputime.c xen: move xen_setup_runstate_info and get_runstate_snapshot to drivers/xen/time.c
Diffstat (limited to 'include/uapi')
-rw-r--r--include/uapi/xen/gntdev.h50
1 files changed, 50 insertions, 0 deletions
diff --git a/include/uapi/xen/gntdev.h b/include/uapi/xen/gntdev.h
index aa7610a9b867..d0661977667e 100644
--- a/include/uapi/xen/gntdev.h
+++ b/include/uapi/xen/gntdev.h
@@ -144,6 +144,56 @@ struct ioctl_gntdev_unmap_notify {
__u32 event_channel_port;
};
+struct gntdev_grant_copy_segment {
+ union {
+ void __user *virt;
+ struct {
+ grant_ref_t ref;
+ __u16 offset;
+ domid_t domid;
+ } foreign;
+ } source, dest;
+ __u16 len;
+
+ __u16 flags; /* GNTCOPY_* */
+ __s16 status; /* GNTST_* */
+};
+
+/*
+ * Copy between grant references and local buffers.
+ *
+ * The copy is split into @count @segments, each of which can copy
+ * to/from one grant reference.
+ *
+ * Each segment is similar to struct gnttab_copy in the hypervisor ABI
+ * except the local buffer is specified using a virtual address
+ * (instead of a GFN and offset).
+ *
+ * The local buffer may cross a Xen page boundary -- the driver will
+ * split segments into multiple ops if required.
+ *
+ * Returns 0 if all segments have been processed and @status in each
+ * segment is valid. Note that one or more segments may have failed
+ * (status != GNTST_okay).
+ *
+ * If the driver had to split a segment into two or more ops, @status
+ * includes the status of the first failed op for that segment (or
+ * GNTST_okay if all ops were successful).
+ *
+ * If -1 is returned, the status of all segments is undefined.
+ *
+ * EINVAL: A segment has local buffers for both source and
+ * destination.
+ * EINVAL: A segment crosses the boundary of a foreign page.
+ * EFAULT: A segment's local buffer is not accessible.
+ */
+#define IOCTL_GNTDEV_GRANT_COPY \
+ _IOC(_IOC_NONE, 'G', 8, sizeof(struct ioctl_gntdev_grant_copy))
+struct ioctl_gntdev_grant_copy {
+ unsigned int count;
+ struct gntdev_grant_copy_segment __user *segments;
+};
+
/* Clear (set to zero) the byte specified by index */
#define UNMAP_NOTIFY_CLEAR_BYTE 0x1
/* Send an interrupt on the indicated event channel */