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authorPeter Maydell <peter.maydell@linaro.org>2016-08-16 13:03:15 +0100
committerPeter Maydell <peter.maydell@linaro.org>2016-08-16 13:03:16 +0100
commit725092ede525bee957b1a9cbe37ed618130dbb25 (patch)
treed4562242a448d0b751f05c447ce22ebcd2da9ccb /target-i386/kvm.c
parent1f8b56e7cebc71d80aec27a4760024b56acc957a (diff)
parent648774779aa6cdf755a296d1a15849ced51072f1 (diff)
downloadfocaccia-qemu-725092ede525bee957b1a9cbe37ed618130dbb25.tar.gz
focaccia-qemu-725092ede525bee957b1a9cbe37ed618130dbb25.zip
Merge remote-tracking branch 'remotes/ehabkost/tags/x86-pull-request' into staging
target-i386: kernel_irqchip=off fix for KVM

# gpg: Signature made Tue 16 Aug 2016 12:55:42 BST
# gpg:                using RSA key 0x2807936F984DC5A6
# gpg: Good signature from "Eduardo Habkost <ehabkost@redhat.com>"
# Primary key fingerprint: 5A32 2FD5 ABC4 D3DB ACCF  D1AA 2807 936F 984D C5A6

* remotes/ehabkost/tags/x86-pull-request:
  target-i386: kvm: Report kvm_pv_unhalt as unsupported w/o kernel_irqchip

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target-i386/kvm.c')
-rw-r--r--target-i386/kvm.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 0b2016a77a..d1a25c5465 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -329,6 +329,13 @@ uint32_t kvm_arch_get_supported_cpuid(KVMState *s, uint32_t function,
          */
         cpuid_1_edx = kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX);
         ret |= cpuid_1_edx & CPUID_EXT2_AMD_ALIASES;
+    } else if (function == KVM_CPUID_FEATURES && reg == R_EAX) {
+        /* kvm_pv_unhalt is reported by GET_SUPPORTED_CPUID, but it can't
+         * be enabled without the in-kernel irqchip
+         */
+        if (!kvm_irqchip_in_kernel()) {
+            ret &= ~(1U << KVM_FEATURE_PV_UNHALT);
+        }
     }
 
     /* fallback for older kernels */