@@ -105,6 +105,15 @@
#define BOOK3S_INTERRUPT_FAC_UNAVAIL 0xf60
#define BOOK3S_INTERRUPT_H_FAC_UNAVAIL 0xf80
+/* book3s_hv */
+
+/*
+ * Special trap used to indicate to host that this is a
+ * passthrough interrupt that could not be handled
+ * completely in the guest.
+ */
+#define BOOK3S_INTERRUPT_HV_RM_HARD 0x5555
+
#define BOOK3S_IRQPRIO_SYSTEM_RESET 0
#define BOOK3S_IRQPRIO_DATA_SEGMENT 1
#define BOOK3S_IRQPRIO_INST_SEGMENT 2
@@ -136,6 +145,7 @@
#define RESUME_FLAG_NV (1<<0) /* Reload guest nonvolatile state? */
#define RESUME_FLAG_HOST (1<<1) /* Resume host? */
#define RESUME_FLAG_ARCH1 (1<<2)
+#define RESUME_FLAG_ARCH2 (1<<3)
#define RESUME_GUEST 0
#define RESUME_GUEST_NV RESUME_FLAG_NV
@@ -469,6 +469,7 @@ static inline struct kvmppc_passthru_irqmap *kvmppc_get_passthru_irqmap(
extern void kvmppc_alloc_host_rm_ops(void);
extern void kvmppc_free_host_rm_ops(void);
extern void kvmppc_free_pimap(struct kvm *kvm);
+extern int kvmppc_xics_rm_complete(struct kvm_vcpu *vcpu, u32 hcall);
extern void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu);
extern int kvmppc_xics_create_icp(struct kvm_vcpu *vcpu, unsigned long server);
extern int kvm_vm_ioctl_xics_irq(struct kvm *kvm, struct kvm_irq_level *args);
@@ -489,6 +490,8 @@ static inline struct kvmppc_passthru_irqmap *kvmppc_get_passthru_irqmap(
static inline void kvmppc_alloc_host_rm_ops(void) {};
static inline void kvmppc_free_host_rm_ops(void) {};
static inline void kvmppc_free_pimap(struct kvm *kvm) {};
+static inline int kvmppc_xics_rm_complete(struct kvm_vcpu *vcpu, u32 hcall)
+ { return 0; }
static inline int kvmppc_xics_enabled(struct kvm_vcpu *vcpu)
{ return 0; }
static inline void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu) { }
@@ -73,6 +73,8 @@
/* Used to indicate that a guest page fault needs to be handled */
#define RESUME_PAGE_FAULT (RESUME_GUEST | RESUME_FLAG_ARCH1)
+/* Used to indicate that a guest passthrough interrupt needs to be handled */
+#define RESUME_PASSTHROUGH (RESUME_GUEST | RESUME_FLAG_ARCH2)
/* Used as a "null" value for timebase values */
#define TB_NIL (~(u64)0)
@@ -994,6 +996,9 @@ static int kvmppc_handle_exit_hv(struct kvm_run *run, struct kvm_vcpu *vcpu,
kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
r = RESUME_GUEST;
break;
+ case BOOK3S_INTERRUPT_HV_RM_HARD:
+ r = RESUME_PASSTHROUGH;
+ break;
default:
kvmppc_dump_regs(vcpu);
printk(KERN_EMERG "trap=0x%x | pc=0x%lx | msr=0x%llx\n",
@@ -2821,7 +2826,8 @@ static int kvmppc_vcpu_run_hv(struct kvm_run *run, struct kvm_vcpu *vcpu)
r = kvmppc_book3s_hv_page_fault(run, vcpu,
vcpu->arch.fault_dar, vcpu->arch.fault_dsisr);
srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
- }
+ } else if (r == RESUME_PASSTHROUGH)
+ r = kvmppc_xics_rm_complete(vcpu, 0);
} while (is_kvmppc_resume_guest(r));
out:
@@ -321,6 +321,7 @@ static struct kvmppc_irq_map *get_irqmap(struct kvmppc_passthru_irqmap *pimap,
* Returns:
* 0 if no interrupt is pending
* 1 if an interrupt is pending that needs to be handled by the host
+ * 2 Passthrough that needs completion in the host
* -1 if there was a guest wakeup IPI (which has now been cleared)
* -2 if there is PCI passthrough external interrupt that was handled
*/
@@ -751,7 +751,7 @@ long kvmppc_deliver_irq_passthru(struct kvm_vcpu *vcpu,
icp_eoi(irq_desc_get_chip(irq_map->desc), irq_map->r_hwirq, xirr);
if (check_too_hard(xics, icp) == H_TOO_HARD)
- return 1;
+ return 2;
else
return -2;
}
@@ -1189,6 +1189,11 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
* 1 An interrupt is pending that needs to be handled by the host
* Exit guest and return to host by branching to guest_exit_cont
*
+ * 2 Passthrough that needs completion in the host
+ * Exit guest and return to host by branching to guest_exit_cont
+ * However, we also set r12 to BOOK3S_INTERRUPT_HV_RM_HARD
+ * to indicate to the host to complete handling the interrupt
+ *
* Before returning to guest, we check if any CPU is heading out
* to the host and if so, we head out also. If no CPUs are heading
* check return values <= 0.
@@ -1204,6 +1209,15 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
* Return to guest to deliver any pending guest interrupts.
*/
+ cmpdi r3, 1
+ ble 1f
+
+ /* Return code = 2 */
+ li r12, BOOK3S_INTERRUPT_HV_RM_HARD
+ stw r12, VCPU_TRAP(r9)
+ b guest_exit_cont
+
+1: /* Return code <= 1 */
cmpdi r3, 0
bgt guest_exit_cont
@@ -2419,6 +2433,17 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
bl kvmppc_read_intr
nop
li r12, BOOK3S_INTERRUPT_EXTERNAL
+ cmpdi r3, 1
+ ble 1f
+
+ /*
+ * Return code of 2 means PCI passthrough interrupt, but
+ * we need to return back to host to complete handling the
+ * interrupt. Trap reason is expected in r12 by guest
+ * exit code.
+ */
+ li r12, BOOK3S_INTERRUPT_HV_RM_HARD
+1:
ld r0, PPC_MIN_STKFRM+PPC_LR_STKOFF(r1)
addi r1, r1, PPC_MIN_STKFRM
mtlr r0
@@ -812,7 +812,7 @@ static noinline int kvmppc_h_eoi(struct kvm_vcpu *vcpu, unsigned long xirr)
return H_SUCCESS;
}
-static noinline int kvmppc_xics_rm_complete(struct kvm_vcpu *vcpu, u32 hcall)
+int kvmppc_xics_rm_complete(struct kvm_vcpu *vcpu, u32 hcall)
{
struct kvmppc_xics *xics = vcpu->kvm->arch.xics;
struct kvmppc_icp *icp = vcpu->arch.icp;
@@ -841,6 +841,7 @@ static noinline int kvmppc_xics_rm_complete(struct kvm_vcpu *vcpu, u32 hcall)
return H_SUCCESS;
}
+EXPORT_SYMBOL_GPL(kvmppc_xics_rm_complete);
int kvmppc_xics_hcall(struct kvm_vcpu *vcpu, u32 req)
{