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KVM: PPC: Move guest enter/exit down into subarch-specific code 

Instead of doing the kvm_guest_enter/exit() and local_irq_dis/enable()
calls in powerpc.c, this moves them down into the subarch-specific
book3s_pr.c and booke.c.  This eliminates an extra local_irq_enable()
call in book3s_pr.c, and will be needed for when we do SMT4 guest
support in the book3s hypervisor mode code.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Paul Mackerras 2011-06-29 00:19:50 +00:00 committed by Avi Kivity
parent f9e0554dec
commit df6909e5d5
5 changed files with 22 additions and 12 deletions
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1
arch/powerpc/include/asm/kvm_ppc.h
View File

@ -42,6 +42,7 @@ enum emulation_result {
EMULATE_AGAIN, /* something went wrong. go again */
};
extern int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
extern int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
extern char kvmppc_handlers_start[];
extern unsigned long kvmppc_handler_len;

2
arch/powerpc/kvm/book3s_interrupts.S
View File

@ -85,7 +85,7 @@
* r3: kvm_run pointer
* r4: vcpu pointer
*/
_GLOBAL(__kvmppc_vcpu_entry)
_GLOBAL(__kvmppc_vcpu_run)
kvm_start_entry:
/* Write correct stack frame */

12
arch/powerpc/kvm/book3s_pr.c
View File

@ -891,8 +891,7 @@ void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
vfree(vcpu_book3s);
}
extern int __kvmppc_vcpu_entry(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
{
int ret;
double fpr[32][TS_FPRWIDTH];
@ -944,14 +943,15 @@ int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
/* Remember the MSR with disabled extensions */
ext_msr = current->thread.regs->msr;
/* XXX we get called with irq disabled - change that! */
local_irq_enable();
/* Preload FPU if it's enabled */
if (vcpu->arch.shared->msr & MSR_FP)
kvmppc_handle_ext(vcpu, BOOK3S_INTERRUPT_FP_UNAVAIL, MSR_FP);
ret = __kvmppc_vcpu_entry(kvm_run, vcpu);
kvm_guest_enter();
ret = __kvmppc_vcpu_run(kvm_run, vcpu);
kvm_guest_exit();
local_irq_disable();

13
arch/powerpc/kvm/booke.c
View File

@ -312,6 +312,19 @@ void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu)
vcpu->arch.shared->int_pending = 0;
}
int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
{
int ret;
local_irq_disable();
kvm_guest_enter();
ret = __kvmppc_vcpu_run(kvm_run, vcpu);
kvm_guest_exit();
local_irq_enable();
return ret;
}
/**
* kvmppc_handle_exit
*

6
arch/powerpc/kvm/powerpc.c
View File

@ -500,11 +500,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
kvmppc_core_deliver_interrupts(vcpu);
local_irq_disable();
kvm_guest_enter();
r = __kvmppc_vcpu_run(run, vcpu);
kvm_guest_exit();
local_irq_enable();
r = kvmppc_vcpu_run(run, vcpu);
if (vcpu->sigset_active)
sigprocmask(SIG_SETMASK, &sigsaved, NULL);