On Sat, Mar 09, 2013 at 07:48:50AM +0100, Paolo Bonzini wrote:
> CPU_INTERRUPT_INIT can also be generated if you have an internal APIC,
> since the keyboard controller and the southbridge can also pulse the
> CPU's INIT# pin.
>
> Exit the VCPU is one is received, and process it by changing the
> mp_state to KVM_MP_STATE_INIT_RECEIVED.
>
> Signed-off-by: Paolo Bonzini <[email protected]>
> ---
> target-i386/kvm.c | 34 +++++++++++++++++++++++-----------
> 1 file changed, 23 insertions(+), 11 deletions(-)
>
> diff --git a/target-i386/kvm.c b/target-i386/kvm.c
> index 0cf413d..56de77c 100644
> --- a/target-i386/kvm.c
> +++ b/target-i386/kvm.c
> @@ -1772,14 +1772,15 @@ void kvm_arch_pre_run(CPUState *cpu, struct kvm_run
> *run)
> }
> }
>
> - if (!kvm_irqchip_in_kernel()) {
> - /* Force the VCPU out of its inner loop to process any INIT requests
> - * or pending TPR access reports. */
> - if (env->interrupt_request &
> - (CPU_INTERRUPT_INIT | CPU_INTERRUPT_TPR)) {
> - cpu->exit_request = 1;
> - }
> + /* Force the VCPU out of its inner loop to process any INIT requests
> + * or (for userspace APIC, but it is cheap to combine the checks here)
> + * pending TPR access reports.
> + */
> + if (env->interrupt_request & (CPU_INTERRUPT_INIT | CPU_INTERRUPT_TPR)) {
> + cpu->exit_request = 1;
> + }
>
> + if (!kvm_irqchip_in_kernel()) {
> /* Try to inject an interrupt if the guest can accept it */
> if (run->ready_for_interrupt_injection &&
> (env->interrupt_request & CPU_INTERRUPT_HARD) &&
> @@ -1835,6 +1836,7 @@ int kvm_arch_process_async_events(CPUState *cs)
> {
> X86CPU *cpu = X86_CPU(cs);
> CPUX86State *env = &cpu->env;
> + int ret;
>
> if (env->interrupt_request & CPU_INTERRUPT_MCE) {
> /* We must not raise CPU_INTERRUPT_MCE if it's not supported. */
> @@ -1859,6 +1861,20 @@ int kvm_arch_process_async_events(CPUState *cs)
> }
> }
>
> + if (env->interrupt_request & CPU_INTERRUPT_INIT) {
> + kvm_cpu_synchronize_state(env);
> + if (kvm_irqchip_in_kernel()) {
> + env->mp_state = KVM_MP_STATE_INIT_RECEIVED;
> + env->interrupt_request = 0;
> + ret = kvm_put_mp_state(cpu);
> + if (ret < 0) {
> + return ret;
> + }
> + } else {
> + do_cpu_init(cpu);
> + }
> + }
> +
Why not move INIT case from below as is? Vcpu is reset to correct sate
by QEMU just like during system_reset.
> if (kvm_irqchip_in_kernel()) {
> return 0;
> }
> @@ -1872,10 +1888,6 @@ int kvm_arch_process_async_events(CPUState *cs)
> (env->interrupt_request & CPU_INTERRUPT_NMI)) {
> env->halted = 0;
> }
> - if (env->interrupt_request & CPU_INTERRUPT_INIT) {
> - kvm_cpu_synchronize_state(env);
> - do_cpu_init(cpu);
> - }
> if (env->interrupt_request & CPU_INTERRUPT_SIPI) {
> kvm_cpu_synchronize_state(env);
> do_cpu_sipi(cpu);
> --
> 1.8.1.4
--
Gleb.
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