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| author | Nadav Amit <namit@cs.technion.ac.il> | 2014-11-02 12:54:59 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-11-08 10:20:51 +0300 |
| commit | db324fe6f20b0ad118d230da23107ddb12784e8c (patch) | |
| tree | 03fa36f2a03bcb53dcba7d7b53464aabcf2ec171 /arch/x86/kvm | |
| parent | d14cb5df59037f690e62f828c9977c23b1a59e0b (diff) | |
| download | linux-db324fe6f20b0ad118d230da23107ddb12784e8c.tar.xz | |
KVM: x86: Warn on APIC base relocation
APIC base relocation is unsupported by KVM. If anyone uses it, the least should
be to report a warning in the hypervisor.
Note that KVM-unit-tests uses this feature for some reason, so running the
tests triggers the warning.
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/lapic.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index e7f7fc632a9b..344e7d36d0e8 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -1457,6 +1457,10 @@ void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value) apic->base_address = apic->vcpu->arch.apic_base & MSR_IA32_APICBASE_BASE; + if ((value & MSR_IA32_APICBASE_ENABLE) && + apic->base_address != APIC_DEFAULT_PHYS_BASE) + pr_warn_once("APIC base relocation is unsupported by KVM"); + /* with FSB delivery interrupt, we can restart APIC functionality */ apic_debug("apic base msr is 0x%016" PRIx64 ", and base address is " "0x%lx.\n", apic->vcpu->arch.apic_base, apic->base_address); |