[PATCH] x86/cpuid: gate the hypervisor PV-only leaf on is_pv_domain()

Hypervisor leaf 5 is PV-specific, but is gated with !is_hvm_domain(),
which stays a runtime test in a build without PV support. Test for a
PV domain directly so the compiler can discard the leaf when
CONFIG_PV is disabled.

Suggested-by: Roger Pau Monné <[email protected]>
Signed-off-by: Jiaqing Zhao <[email protected]>
---
 xen/arch/x86/cpuid.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/cpuid.c b/xen/arch/x86/cpuid.c
index 6e9b15c9c3..a9aeb2d268 100644
--- a/xen/arch/x86/cpuid.c
+++ b/xen/arch/x86/cpuid.c
@@ -157,7 +157,7 @@ static void cpuid_hypervisor_leaves(const struct vcpu *v, uint32_t leaf,
         break;
 
     case 5: /* PV-specific parameters */
-        if ( is_hvm_domain(d) || subleaf != 0 )
+        if ( !is_pv_domain(d) || subleaf != 0 )
             break;
 
         res->b = flsl(get_upper_mfn_bound()) + PAGE_SHIFT;
-- 
2.53.0