[Xen-devel] [PATCH] hvm: Allow HVM guests to make console_io hypercall.

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

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@xxxxxxxxxx>
---
 xen/arch/x86/hvm/hvm.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/xen/arch/x86/hvm/hvm.c b/xen/arch/x86/hvm/hvm.c
index e0e0f5d..1f0d795 100644
--- a/xen/arch/x86/hvm/hvm.c
+++ b/xen/arch/x86/hvm/hvm.c
@@ -3299,6 +3299,7 @@ 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),
@@ -3318,6 +3319,7 @@ 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),
-- 
1.8.3.1


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