kvm: libkvm: add powerpc libkvm support code

While the kernel code has not yet made it upstream, after seeing the skeleton
patches making it in over the holiday, I decided to send this since
it's for the most part stable with what we are hacking away with in kernel.

Signed-off-by: Jerone Young <jyoung5@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

2 files changed, 74 insertions, 3 deletions

diff --git a/libkvm/libkvm-powerpc.c b/libkvm/libkvm-powerpc.c
index 5a8c556a..33459bbf 100644
--- a/libkvm/libkvm-powerpc.c
+++ b/libkvm/libkvm-powerpc.c
@@ -1,18 +1,75 @@
+/*
+ * This header is for functions & variables that will ONLY be
+ * used inside libkvm for x86.
+ * THESE ARE NOT EXPOSED TO THE USER AND ARE ONLY FOR USE
+ * WITHIN LIBKVM.
+ *
+ * derived from libkvm.c
+ *
+ * Copyright (C) 2006 Qumranet, Inc.
+ *
+ * Authors:
+ *      Avi Kivity   <avi@qumranet.com>
+ *      Yaniv Kamay  <yaniv@qumranet.com>
+ *
+ * Copyright 2007 IBM Corporation.
+ * Added by & Authors:
+ * 	Jerone Young <jyoung5@us.ibm.com>
+ * 	Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
+ *
+ *
+ * This work is licensed under the GNU LGPL license, version 2.
+ */
+
 #include "libkvm.h"
 #include "kvm-powerpc.h"
 #include <errno.h>
+#include <stdio.h>
+
+int handle_dcr(struct kvm_run *run,  kvm_context_t kvm)
+{
+	int ret = 0;
+
+	if (run->dcr.is_write)
+		ret = kvm->callbacks->powerpc_dcr_write(kvm,
+					run->dcr.dcrn,run->dcr.data);
+	else
+		ret = kvm->callbacks->powerpc_dcr_read(kvm,
+					run->dcr.dcrn, &(run->dcr.data));
+
+	return ret;
+}
 
-int kvm_run_abi10(kvm_context_t kvm, int vcpu)
+int kvm_alloc_kernel_memory(kvm_context_t kvm, unsigned long memory,
+				void **vm_mem)
 {
-	return -ENOSYS;
+	fprintf(stderr, "%s: Operation not supported\n", __FUNCTION__);
+	return -1;
 }
 
 void kvm_show_code(kvm_context_t kvm, int vcpu)
 {
+	fprintf(stderr, "%s: Operation not supported\n", __FUNCTION__);
 }
 
 void kvm_show_regs(kvm_context_t kvm, int vcpu)
 {
+	struct kvm_regs regs;
+	int i;
+
+	if (kvm_get_regs(kvm, vcpu, &regs))
+		return;
+
+	for (i=0; i<32; i+=4)
+	{
+		fprintf(stderr, "gpr%02d: %08x %08x %08x %08x\n", i,
+			regs.gpr[i],
+			regs.gpr[i+1],
+			regs.gpr[i+2],
+			regs.gpr[i+3]);
+	}
+
+	fflush(stdout);
 }
 
 int kvm_arch_create(kvm_context_t kvm, unsigned long phys_mem_bytes,
@@ -30,5 +87,15 @@ int kvm_arch_create_default_phys_mem(kvm_context_t kvm,
 
 int kvm_arch_run(struct kvm_run *run, kvm_context_t kvm, int vcpu)
 {
-	return 0;
+	int ret = 0;
+
+	switch (run->exit_reason){
+	case KVM_EXIT_DCR:
+		ret = handle_dcr(run, kvm);
+		break;
+	default:
+		ret = 1;
+		break;
+	}
+	return ret;
 }
diff --git a/libkvm/libkvm.h b/libkvm/libkvm.h
index 3aae6f62..2574abef 100644
--- a/libkvm/libkvm.h
+++ b/libkvm/libkvm.h
@@ -65,6 +65,10 @@ struct kvm_callbacks {
     void (*post_kvm_run)(void *opaque, int vcpu);
     int (*pre_kvm_run)(void *opaque, int vcpu);
     int (*tpr_access)(void *opaque, int vcpu, uint64_t rip, int is_write);
+#if defined(__powerpc__)
+    int (*powerpc_dcr_read)(kvm_context_t kvm, uint32_t dcrn, uint32_t *data);
+    int (*powerpc_dcr_write)(kvm_context_t kvm, uint32_t dcrn, uint32_t data);
+#endif
 };
 
 /*!