1 files changed, 153 insertions, 0 deletions

diff --git a/arch/arm/kvm/coproc.h b/arch/arm/kvm/coproc.h
new file mode 100644
index 000000000000..992adfafa2ff
--- /dev/null
+++ b/arch/arm/kvm/coproc.h
@@ -0,0 +1,153 @@
+/*
+ * Copyright (C) 2012 - Virtual Open Systems and Columbia University
+ * Authors: Christoffer Dall <c.dall@virtualopensystems.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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#ifndef __ARM_KVM_COPROC_LOCAL_H__
+#define __ARM_KVM_COPROC_LOCAL_H__
+
+struct coproc_params {
+        unsigned long CRn;
+        unsigned long CRm;
+        unsigned long Op1;
+        unsigned long Op2;
+        unsigned long Rt1;
+        unsigned long Rt2;
+        bool is_64bit;
+        bool is_write;
+};
+
+struct coproc_reg {
+        /* MRC/MCR/MRRC/MCRR instruction which accesses it. */
+        unsigned long CRn;
+        unsigned long CRm;
+        unsigned long Op1;
+        unsigned long Op2;
+
+        bool is_64;
+
+        /* Trapped access from guest, if non-NULL. */
+        bool (*access)(struct kvm_vcpu *,
+                       const struct coproc_params *,
+                       const struct coproc_reg *);
+
+        /* Initialization for vcpu. */
+        void (*reset)(struct kvm_vcpu *, const struct coproc_reg *);
+
+        /* Index into vcpu->arch.cp15[], or 0 if we don't need to save it. */
+        unsigned long reg;
+
+        /* Value (usually reset value) */
+        u64 val;
+};
+
+static inline void print_cp_instr(const struct coproc_params *p)
+{
+        /* Look, we even formatted it for you to paste into the table! */
+        if (p->is_64bit) {
+                kvm_pr_unimpl(" { CRm(%2lu), Op1(%2lu), is64, func_%s },\n",
+                              p->CRm, p->Op1, p->is_write ? "write" : "read");
+        } else {
+                kvm_pr_unimpl(" { CRn(%2lu), CRm(%2lu), Op1(%2lu), Op2(%2lu), is32,"
+                              " func_%s },\n",
+                              p->CRn, p->CRm, p->Op1, p->Op2,
+                              p->is_write ? "write" : "read");
+        }
+}
+
+static inline bool ignore_write(struct kvm_vcpu *vcpu,
+                                const struct coproc_params *p)
+{
+        return true;
+}
+
+static inline bool read_zero(struct kvm_vcpu *vcpu,
+                             const struct coproc_params *p)
+{
+        *vcpu_reg(vcpu, p->Rt1) = 0;
+        return true;
+}
+
+static inline bool write_to_read_only(struct kvm_vcpu *vcpu,
+                                      const struct coproc_params *params)
+{
+        kvm_debug("CP15 write to read-only register at: %08x\n",
+                  *vcpu_pc(vcpu));
+        print_cp_instr(params);
+        return false;
+}
+
+static inline bool read_from_write_only(struct kvm_vcpu *vcpu,
+                                        const struct coproc_params *params)
+{
+        kvm_debug("CP15 read to write-only register at: %08x\n",
+                  *vcpu_pc(vcpu));
+        print_cp_instr(params);
+        return false;
+}
+
+/* Reset functions */
+static inline void reset_unknown(struct kvm_vcpu *vcpu,
+                                 const struct coproc_reg *r)
+{
+        BUG_ON(!r->reg);
+        BUG_ON(r->reg >= ARRAY_SIZE(vcpu->arch.cp15));
+        vcpu->arch.cp15[r->reg] = 0xdecafbad;
+}
+
+static inline void reset_val(struct kvm_vcpu *vcpu, const struct coproc_reg *r)
+{
+        BUG_ON(!r->reg);
+        BUG_ON(r->reg >= ARRAY_SIZE(vcpu->arch.cp15));
+        vcpu->arch.cp15[r->reg] = r->val;
+}
+
+static inline void reset_unknown64(struct kvm_vcpu *vcpu,
+                                   const struct coproc_reg *r)
+{
+        BUG_ON(!r->reg);
+        BUG_ON(r->reg + 1 >= ARRAY_SIZE(vcpu->arch.cp15));
+
+        vcpu->arch.cp15[r->reg] = 0xdecafbad;
+        vcpu->arch.cp15[r->reg+1] = 0xd0c0ffee;
+}
+
+static inline int cmp_reg(const struct coproc_reg *i1,
+                          const struct coproc_reg *i2)
+{
+        BUG_ON(i1 == i2);
+        if (!i1)
+                return 1;
+        else if (!i2)
+                return -1;
+        if (i1->CRn != i2->CRn)
+                return i1->CRn - i2->CRn;
+        if (i1->CRm != i2->CRm)
+                return i1->CRm - i2->CRm;
+        if (i1->Op1 != i2->Op1)
+                return i1->Op1 - i2->Op1;
+        return i1->Op2 - i2->Op2;
+}
+
+
+#define CRn(_x)         .CRn = _x
+#define CRm(_x)         .CRm = _x
+#define Op1(_x)         .Op1 = _x
+#define Op2(_x)         .Op2 = _x
+#define is64            .is_64 = true
+#define is32            .is_64 = false
+
+#endif /* __ARM_KVM_COPROC_LOCAL_H__ */