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[Qemu-devel] [PATCH] kvm: do not force hypervisor flag in guest`s CPUID


From: Vladislav Yarmak
Subject: [Qemu-devel] [PATCH] kvm: do not force hypervisor flag in guest`s CPUID
Date: Thu, 23 Apr 2015 14:33:23 +0300

Do not force hypervisor flag in guests` CPUID - let invoker decide this. It is 
needed for hidding hypervisor from guest and aimed to run Hyper-V nested in KVM.

Signed-off-by: Vladislav A Yarmak <address@hidden>

---
 target-i386/kvm.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 41d09e5..63026cc 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -213,10 +213,6 @@ uint32_t kvm_arch_get_supported_cpuid(KVMState *s, 
uint32_t function,
         /* KVM before 2.6.30 misreports the following features */
         ret |= CPUID_MTRR | CPUID_PAT | CPUID_MCE | CPUID_MCA;
     } else if (function == 1 && reg == R_ECX) {
-        /* We can set the hypervisor flag, even if KVM does not return it on
-         * GET_SUPPORTED_CPUID
-         */
-        ret |= CPUID_EXT_HYPERVISOR;
         /* tsc-deadline flag is not returned by GET_SUPPORTED_CPUID, but it
          * can be enabled if the kernel has KVM_CAP_TSC_DEADLINE_TIMER,
          * and the irqchip is in the kernel.
-- 
2.1.4




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