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| author | Paul Durrant <paul.durrant@citrix.com> | 2017-02-13 18:03:23 +0100 |
|---|---|---|
| committer | Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2017-02-14 21:13:43 +0100 |
| commit | ab520be8cd5d56867fc95cfbc34b90880faf1f9d (patch) | |
| tree | 4c432a918ffbd6308f752eaac36b322b811582b1 /arch/arm/xen | |
| parent | xen/privcmd: return -ENOTTY for unimplemented IOCTLs (diff) | |
| download | linux-ab520be8cd5d56867fc95cfbc34b90880faf1f9d.tar.xz linux-ab520be8cd5d56867fc95cfbc34b90880faf1f9d.zip | |
xen/privcmd: Add IOCTL_PRIVCMD_DM_OP
Recently a new dm_op[1] hypercall was added to Xen to provide a mechanism
for restricting device emulators (such as QEMU) to a limited set of
hypervisor operations, and being able to audit those operations in the
kernel of the domain in which they run.
This patch adds IOCTL_PRIVCMD_DM_OP as gateway for __HYPERVISOR_dm_op.
NOTE: There is no requirement for user-space code to bounce data through
locked memory buffers (as with IOCTL_PRIVCMD_HYPERCALL) since
privcmd has enough information to lock the original buffers
directly.
[1] http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=524a98c2
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'arch/arm/xen')
| -rw-r--r-- | arch/arm/xen/enlighten.c | 1 | ||||
| -rw-r--r-- | arch/arm/xen/hypercall.S | 1 |
2 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm/xen/enlighten.c b/arch/arm/xen/enlighten.c index 11d9f2898b16..81e3217b12d3 100644 --- a/arch/arm/xen/enlighten.c +++ b/arch/arm/xen/enlighten.c @@ -457,4 +457,5 @@ EXPORT_SYMBOL_GPL(HYPERVISOR_tmem_op); EXPORT_SYMBOL_GPL(HYPERVISOR_platform_op); EXPORT_SYMBOL_GPL(HYPERVISOR_multicall); EXPORT_SYMBOL_GPL(HYPERVISOR_vm_assist); +EXPORT_SYMBOL_GPL(HYPERVISOR_dm_op); EXPORT_SYMBOL_GPL(privcmd_call); diff --git a/arch/arm/xen/hypercall.S b/arch/arm/xen/hypercall.S index a648dfc3be30..b0b80c0f09f3 100644 --- a/arch/arm/xen/hypercall.S +++ b/arch/arm/xen/hypercall.S @@ -92,6 +92,7 @@ HYPERCALL1(tmem_op); HYPERCALL1(platform_op_raw); HYPERCALL2(multicall); HYPERCALL2(vm_assist); +HYPERCALL3(dm_op); ENTRY(privcmd_call) stmdb sp!, {r4} |