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authorPaul Durrant <paul.durrant@citrix.com>2017-02-13 17:03:23 +0000
committerBoris Ostrovsky <boris.ostrovsky@oracle.com>2017-02-14 15:13:43 -0500
commitab520be8cd5d56867fc95cfbc34b90880faf1f9d (patch)
tree4c432a918ffbd6308f752eaac36b322b811582b1 /arch/arm/xen/hypercall.S
parentxen/privcmd: return -ENOTTY for unimplemented IOCTLs (diff)
downloadlinux-dev-ab520be8cd5d56867fc95cfbc34b90880faf1f9d.tar.xz
linux-dev-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/hypercall.S')
-rw-r--r--arch/arm/xen/hypercall.S1
1 files changed, 1 insertions, 0 deletions
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}