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Merge tag 'for-linus-4.5-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

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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
This commit is contained in:
Linus Torvalds
2016-01-12 13:05:36 -08:00
parent 75777c1855 a4cdb556ca
commit c9bed1cf51
34 changed files with 677 additions and 131 deletions
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50
include/uapi/xen/gntdev.h
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@@ -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 */