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[Qemu-devel] [PATCH 2/6 v6] ppc: Add interface to inject interrupt to gu


From: Bharat Bhushan
Subject: [Qemu-devel] [PATCH 2/6 v6] ppc: Add interface to inject interrupt to guest
Date: Thu, 10 Jul 2014 16:27:58 +0530

This patch adds interface to inject interrupt to guest.
Currently a void program check exception function added.
Follow up patch will use this interface to inject program
check exception to guest

Signed-off-by: Bharat Bhushan <address@hidden>
---
v5->v6
 - replace debug with program interrupt

 target-ppc/cpu.h |  1 +
 target-ppc/kvm.c | 23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/target-ppc/cpu.h b/target-ppc/cpu.h
index b64c652..e60fc40 100644
--- a/target-ppc/cpu.h
+++ b/target-ppc/cpu.h
@@ -2144,6 +2144,7 @@ enum {
     PPC_INTERRUPT_CDOORBELL,      /* Critical doorbell interrupt          */
     PPC_INTERRUPT_DOORBELL,       /* Doorbell interrupt                   */
     PPC_INTERRUPT_PERFM,          /* Performance monitor interrupt        */
+    PPC_INTERRUPT_PROGRAM,        /* Program check exception              */
 };
 
 /* Processor Compatibility mask (PCR) */
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index 4df23dd..673c369 100644
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -761,6 +761,25 @@ static int kvm_put_vpa(CPUState *cs)
 }
 #endif /* TARGET_PPC64 */
 
+static int kvmppc_inject_program_exception(CPUState *cs)
+{
+    return 0;
+}
+
+static void kvmppc_inject_exception(CPUState *cs)
+{
+    PowerPCCPU *cpu = POWERPC_CPU(cs);
+    CPUPPCState *env = &cpu->env;
+
+    if (env->pending_interrupts & (1 << PPC_INTERRUPT_PROGRAM)) {
+        if (kvmppc_inject_program_exception(cs)) {
+            fprintf(stderr, "%s: PROGRAM exception injection failed\n", 
__func__);
+            return;
+        }
+        env->pending_interrupts &= ~(1 << PPC_INTERRUPT_PROGRAM);
+    }
+}
+
 int kvm_arch_put_registers(CPUState *cs, int level)
 {
     PowerPCCPU *cpu = POWERPC_CPU(cs);
@@ -774,6 +793,10 @@ int kvm_arch_put_registers(CPUState *cs, int level)
         return ret;
     }
 
+    if (env->pending_interrupts) {
+        kvmppc_inject_exception(cs);
+    }
+
     regs.ctr = env->ctr;
     regs.lr  = env->lr;
     regs.xer = cpu_read_xer(env);
-- 
1.9.3




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