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author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-01-12 13:05:36 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-01-12 13:05:36 -0800 |
commit | c9bed1cf51011c815d88288b774865d013ca78a8 (patch) | |
tree | 77e205b9442338a3d11567d4abcdb8df616979cf /include/uapi | |
parent | 75777c1855e10c010c9c3a21611d95dd9be01ab1 (diff) | |
parent | a4cdb556cae05cd3e7b602b3a44c01420c4e2258 (diff) | |
download | linux-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.h | 50 |
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 */ |