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KVM: PPC: Emulate trap SRR1 flags properly

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Book3S needs some flags in SRR1 to get to know details about an interrupt.

One such example is the trap instruction. It tells the guest kernel that
a program interrupt is due to a trap using a bit in SRR1.

This patch implements above behavior, making WARN_ON behave like WARN_ON.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Alexander Graf 2010-01-08 02:58:07 +01:00 committed by Marcelo Tosatti
parent 021ec9c69f
commit 25a8a02d26
6 changed files with 14 additions and 5 deletions
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1
arch/powerpc/include/asm/kvm_book3s.h
View file

@ -91,6 +91,7 @@ struct kvmppc_vcpu_book3s {
u64 vsid_next;
u64 vsid_max;
int context_id;
ulong prog_flags; /* flags to inject when giving a 700 trap */
};
#define CONTEXT_HOST 0

2
arch/powerpc/include/asm/kvm_ppc.h
View file

@ -80,7 +80,7 @@ extern void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu);
extern void kvmppc_core_deliver_interrupts(struct kvm_vcpu *vcpu);
extern int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu);
extern void kvmppc_core_queue_program(struct kvm_vcpu *vcpu);
extern void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags);
extern void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu);
extern void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu);
extern void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,

4
arch/powerpc/include/asm/reg.h
View file

@ -426,6 +426,10 @@
#define SRR1_WAKEMT 0x00280000 /* mtctrl */
#define SRR1_WAKEDEC 0x00180000 /* Decrementer interrupt */
#define SRR1_WAKETHERM 0x00100000 /* Thermal management interrupt */
#define SRR1_PROGFPE 0x00100000 /* Floating Point Enabled */
#define SRR1_PROGPRIV 0x00040000 /* Privileged instruction */
#define SRR1_PROGTRAP 0x00020000 /* Trap */
#define SRR1_PROGADDR 0x00010000 /* SRR0 contains subsequent addr */
#define SPRN_HSRR0 0x13A /* Save/Restore Register 0 */
#define SPRN_HSRR1 0x13B /* Save/Restore Register 1 */

7
arch/powerpc/kvm/book3s.c
View file

@ -168,8 +168,9 @@ void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
}
void kvmppc_core_queue_program(struct kvm_vcpu *vcpu)
void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
{
to_book3s(vcpu)->prog_flags = flags;
kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_PROGRAM);
}
@ -198,6 +199,7 @@ int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
{
int deliver = 1;
int vec = 0;
ulong flags = 0ULL;
switch (priority) {
case BOOK3S_IRQPRIO_DECREMENTER:
@ -231,6 +233,7 @@ int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
break;
case BOOK3S_IRQPRIO_PROGRAM:
vec = BOOK3S_INTERRUPT_PROGRAM;
flags = to_book3s(vcpu)->prog_flags;
break;
case BOOK3S_IRQPRIO_VSX:
vec = BOOK3S_INTERRUPT_VSX;
@ -261,7 +264,7 @@ int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
#endif
if (deliver)
kvmppc_inject_interrupt(vcpu, vec, 0ULL);
kvmppc_inject_interrupt(vcpu, vec, flags);
return deliver;
}

3
arch/powerpc/kvm/booke.c
View file

@ -82,8 +82,9 @@ static void kvmppc_booke_queue_irqprio(struct kvm_vcpu *vcpu,
set_bit(priority, &vcpu->arch.pending_exceptions);
}
void kvmppc_core_queue_program(struct kvm_vcpu *vcpu)
void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
{
/* BookE does flags in ESR, so ignore those we get here */
kvmppc_booke_queue_irqprio(vcpu, BOOKE_IRQPRIO_PROGRAM);
}

2
arch/powerpc/kvm/emulate.c
View file

@ -154,7 +154,7 @@ int kvmppc_emulate_instruction(struct kvm_run *run, struct kvm_vcpu *vcpu)
#else
vcpu->arch.esr |= ESR_PTR;
#endif
kvmppc_core_queue_program(vcpu);
kvmppc_core_queue_program(vcpu, SRR1_PROGTRAP);
advance = 0;
break;