[PATCH RFC v2 09/19] i386: invert hyperv_spinlock_attempts setting logic with hv_passthrough

Vitaly Kuznetsov posted 19 patches 5 years, 4 months ago
Maintainers: Marcelo Tosatti <mtosatti@redhat.com>, Richard Henderson <rth@twiddle.net>, Paolo Bonzini <pbonzini@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>, Cornelia Huck <cohuck@redhat.com>, Eduardo Habkost <ehabkost@redhat.com>
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[PATCH RFC v2 09/19] i386: invert hyperv_spinlock_attempts setting logic with hv_passthrough
Posted by Vitaly Kuznetsov 5 years, 4 months ago
There is no need to have this special case: like all other Hyper-V
enlightenments we can just use kernel's supplied value in hv_passthrough
mode.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
 target/i386/kvm.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/target/i386/kvm.c b/target/i386/kvm.c
index eb21f77be51b..94e2195acb36 100644
--- a/target/i386/kvm.c
+++ b/target/i386/kvm.c
@@ -1269,11 +1269,7 @@ static int hyperv_handle_properties(CPUState *cs,
         c = cpuid_find_entry(cpuid, HV_CPUID_ENLIGHTMENT_INFO, 0);
         if (c) {
             env->features[FEAT_HV_RECOMM_EAX] = c->eax;
-
-            /* hv-spinlocks may have been overriden */
-            if (cpu->hyperv_spinlock_attempts != HYPERV_SPINLOCK_NEVER_NOTIFY) {
-                c->ebx = cpu->hyperv_spinlock_attempts;
-            }
+            cpu->hyperv_spinlock_attempts = c->ebx;
         }
         c = cpuid_find_entry(cpuid, HV_CPUID_NESTED_FEATURES, 0);
         if (c) {
-- 
2.25.4