x86: allow HVM guests to make console_io hypercall

The console_io hypercall is provided for PV guests and for HVM
guests it is done via the 0xe9 port. However the PV hypercall
is more efficient as it takes a string rather than one character
per write.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index a1a7780fcb72498e3c462ef737a986cda01a4560..de81e4523d704f5e7089213bf88f3471e8f26ebf 100644 (file)
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -3304,6 +3304,7 @@ static hvm_hypercall_t *const hvm_hypercall64_table[NR_hypercalls] = {
     [ __HYPERVISOR_vcpu_op ] = (hvm_hypercall_t *)hvm_vcpu_op,
     [ __HYPERVISOR_physdev_op ] = (hvm_hypercall_t *)hvm_physdev_op,
     HYPERCALL(xen_version),
+    HYPERCALL(console_io),
     HYPERCALL(event_channel_op),
     HYPERCALL(sched_op),
     HYPERCALL(set_timer_op),
@@ -3323,6 +3324,7 @@ static hvm_hypercall_t *const hvm_hypercall32_table[NR_hypercalls] = {
     [ __HYPERVISOR_vcpu_op ] = (hvm_hypercall_t *)hvm_vcpu_op_compat32,
     [ __HYPERVISOR_physdev_op ] = (hvm_hypercall_t *)hvm_physdev_op_compat32,
     COMPAT_CALL(xen_version),
+    HYPERCALL(console_io),
     HYPERCALL(event_channel_op),
     COMPAT_CALL(sched_op),
     COMPAT_CALL(set_timer_op),