diff options
| author |   Andres Lagar-Cavilla <andreslc@gridcentric.ca> | 2012-08-31 09:59:30 -0400 |
|---|---|---|
| committer |   Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2012-09-05 16:36:26 -0400 |
| commit | ceb90fa0a8008059ecbbf9114cb89dc71a730bb6 (patch) | |
| tree | 0f0507ed14176b7e17508b551cd22fef722dde0a /include/xen | |
| parent | xen/mm: return more precise error from xen_remap_domain_range() (diff) | |
| download | linux-dev-ceb90fa0a8008059ecbbf9114cb89dc71a730bb6.tar.xz linux-dev-ceb90fa0a8008059ecbbf9114cb89dc71a730bb6.zip | |
xen/privcmd: add PRIVCMD_MMAPBATCH_V2 ioctl
PRIVCMD_MMAPBATCH_V2 extends PRIVCMD_MMAPBATCH with an additional
field for reporting the error code for every frame that could not be
mapped. libxc prefers PRIVCMD_MMAPBATCH_V2 over PRIVCMD_MMAPBATCH.
Also expand PRIVCMD_MMAPBATCH to return appropriate error-encoding top nibble
in the mfn array.
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla.org>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'include/xen')
| -rw-r--r-- | include/xen/privcmd.h | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/include/xen/privcmd.h b/include/xen/privcmd.h index 45c1aa14b83d..a85316811d79 100644 --- a/include/xen/privcmd.h +++ b/include/xen/privcmd.h @@ -58,13 +58,33 @@ struct privcmd_mmapbatch { int num; /* number of pages to populate */ domid_t dom; /* target domain */ __u64 addr; /* virtual address */ - xen_pfn_t __user *arr; /* array of mfns - top nibble set on err */ + xen_pfn_t __user *arr; /* array of mfns - or'd with + PRIVCMD_MMAPBATCH_*_ERROR on err */ +}; + +#define PRIVCMD_MMAPBATCH_MFN_ERROR 0xf0000000U +#define PRIVCMD_MMAPBATCH_PAGED_ERROR 0x80000000U + +struct privcmd_mmapbatch_v2 { + unsigned int num; /* number of pages to populate */ + domid_t dom; /* target domain */ + __u64 addr; /* virtual address */ + const xen_pfn_t __user *arr; /* array of mfns */ + int __user *err; /* array of error codes */ }; /* * @cmd: IOCTL_PRIVCMD_HYPERCALL * @arg: &privcmd_hypercall_t * Return: Value returned from execution of the specified hypercall. + * + * @cmd: IOCTL_PRIVCMD_MMAPBATCH_V2 + * @arg: &struct privcmd_mmapbatch_v2 + * Return: 0 on success (i.e., arg->err contains valid error codes for + * each frame). On an error other than a failed frame remap, -1 is + * returned and errno is set to EINVAL, EFAULT etc. As an exception, + * if the operation was otherwise successful but any frame failed with + * -ENOENT, then -1 is returned and errno is set to ENOENT. */ #define IOCTL_PRIVCMD_HYPERCALL \ _IOC(_IOC_NONE, 'P', 0, sizeof(struct privcmd_hypercall)) @@ -72,5 +92,7 @@ struct privcmd_mmapbatch { _IOC(_IOC_NONE, 'P', 2, sizeof(struct privcmd_mmap)) #define IOCTL_PRIVCMD_MMAPBATCH \ _IOC(_IOC_NONE, 'P', 3, sizeof(struct privcmd_mmapbatch)) +#define IOCTL_PRIVCMD_MMAPBATCH_V2 \ + _IOC(_IOC_NONE, 'P', 4, sizeof(struct privcmd_mmapbatch_v2)) #endif /* __LINUX_PUBLIC_PRIVCMD_H__ */ |