KVM: x86: Fix PV IPIs for 32-bit KVM host

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commit 1ed199a41c upstream.

The recognition of the KVM_HC_SEND_IPI hypercall was unintentionally
wrapped in "#ifdef CONFIG_X86_64", causing 32-bit KVM hosts to reject
any and all PV IPI requests despite advertising the feature.  This
results in all KVM paravirtualized guests hanging during SMP boot due
to IPIs never being delivered.

Fixes: 4180bf1b65 ("KVM: X86: Implement "send IPI" hypercall")
Cc: stable@vger.kernel.org
Cc: Wanpeng Li <wanpengli@tencent.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Sean Christopherson 2019-01-23 09:22:39 -08:00 • committed by Greg Kroah-Hartman

parent 87bcdeacd4

commit 39493bce6a

1 changed files with 1 additions and 1 deletions

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arch/x86/kvm/x86.c

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