KVM: ppc: E500 core-specific code

Signed-off-by: Liu Yu <yu.liu@freescale.com>
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 151 insertions, 0 deletions

diff --git a/arch/powerpc/kvm/e500.c b/arch/powerpc/kvm/e500.c
new file mode 100644
index 000000000000..7992da497cd4
--- /dev/null
+++ b/arch/powerpc/kvm/e500.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2008 Freescale Semiconductor, Inc. All rights reserved.
+ *
+ * Author: Yu Liu, <yu.liu@freescale.com>
+ *
+ * Description:
+ * This file is derived from arch/powerpc/kvm/44x.c,
+ * by Hollis Blanchard <hollisb@us.ibm.com>.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 2, as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kvm_host.h>
+#include <linux/err.h>
+
+#include <asm/reg.h>
+#include <asm/cputable.h>
+#include <asm/tlbflush.h>
+#include <asm/kvm_e500.h>
+#include <asm/kvm_ppc.h>
+
+#include "e500_tlb.h"
+
+void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu)
+{
+}
+
+void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu)
+{
+}
+
+void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
+{
+        kvmppc_e500_tlb_load(vcpu, cpu);
+}
+
+void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
+{
+        kvmppc_e500_tlb_put(vcpu);
+}
+
+int kvmppc_core_check_processor_compat(void)
+{
+        int r;
+
+        if (strcmp(cur_cpu_spec->cpu_name, "e500v2") == 0)
+                r = 0;
+        else
+                r = -ENOTSUPP;
+
+        return r;
+}
+
+int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu)
+{
+        struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
+
+        kvmppc_e500_tlb_setup(vcpu_e500);
+
+        /* Use the same core vertion as host's */
+        vcpu->arch.pvr = mfspr(SPRN_PVR);
+
+        return 0;
+}
+
+/* 'linear_address' is actually an encoding of AS|PID|EADDR . */
+int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
+                               struct kvm_translation *tr)
+{
+        int index;
+        gva_t eaddr;
+        u8 pid;
+        u8 as;
+
+        eaddr = tr->linear_address;
+        pid = (tr->linear_address >> 32) & 0xff;
+        as = (tr->linear_address >> 40) & 0x1;
+
+        index = kvmppc_e500_tlb_search(vcpu, eaddr, pid, as);
+        if (index < 0) {
+                tr->valid = 0;
+                return 0;
+        }
+
+        tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr);
+        /* XXX what does "writeable" and "usermode" even mean? */
+        tr->valid = 1;
+
+        return 0;
+}
+
+struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
+{
+        struct kvmppc_vcpu_e500 *vcpu_e500;
+        struct kvm_vcpu *vcpu;
+        int err;
+
+        vcpu_e500 = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
+        if (!vcpu_e500) {
+                err = -ENOMEM;
+                goto out;
+        }
+
+        vcpu = &vcpu_e500->vcpu;
+        err = kvm_vcpu_init(vcpu, kvm, id);
+        if (err)
+                goto free_vcpu;
+
+        err = kvmppc_e500_tlb_init(vcpu_e500);
+        if (err)
+                goto uninit_vcpu;
+
+        return vcpu;
+
+uninit_vcpu:
+        kvm_vcpu_uninit(vcpu);
+free_vcpu:
+        kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
+out:
+        return ERR_PTR(err);
+}
+
+void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
+{
+        struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
+
+        kvmppc_e500_tlb_uninit(vcpu_e500);
+        kvm_vcpu_uninit(vcpu);
+        kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
+}
+
+static int kvmppc_e500_init(void)
+{
+        int r;
+
+        r = kvmppc_booke_init();
+        if (r)
+                return r;
+
+        return kvm_init(NULL, sizeof(struct kvmppc_vcpu_e500), THIS_MODULE);
+}
+
+static void kvmppc_e500_exit(void)
+{
+        kvmppc_booke_exit();
+}
+
+module_init(kvmppc_e500_init);
+module_exit(kvmppc_e500_exit);