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target/i386/kvm: fix kvmclock_current_nsec: Assertion `time.tsc_timestamp <= migration_tsc' failed 

New KVM_CLOCK flags were added in the kernel.(c68dc1b577eabd5605c6c7c08f3e07ae18d30d5d)
```
+ #define KVM_CLOCK_VALID_FLAGS						\
+	(KVM_CLOCK_TSC_STABLE | KVM_CLOCK_REALTIME | KVM_CLOCK_HOST_TSC)

	case KVM_CAP_ADJUST_CLOCK:
-		r = KVM_CLOCK_TSC_STABLE;
+		r = KVM_CLOCK_VALID_FLAGS;
```

kvm_has_adjust_clock_stable needs to handle additional flags,
so that s->clock_is_reliable can be true and kvmclock_current_nsec doesn't need to be called.

Signed-off-by: Ray Zhang <zhanglei002@gmail.com>
Message-Id: <20220922100523.2362205-1-zhanglei002@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Ray Zhang 2022-09-22 18:05:23 +08:00 committed by Paolo Bonzini
parent e4333d14c5
commit c4ef867f29
1 changed files with 1 additions and 1 deletions
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2
target/i386/kvm/kvm.c
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@ -157,7 +157,7 @@ bool kvm_has_adjust_clock_stable(void)
{
int ret = kvm_check_extension(kvm_state, KVM_CAP_ADJUST_CLOCK);
return (ret == KVM_CLOCK_TSC_STABLE);
return (ret & KVM_CLOCK_TSC_STABLE);
}
bool kvm_has_adjust_clock(void)