Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / arm / kvm / coproc.h

diff --git a/kernel/arch/arm/kvm/coproc.h b/kernel/arch/arm/kvm/coproc.h
new file mode 100644 (file)
index 0000000..88d24a3
--- /dev/null
+++ b/kernel/arch/arm/kvm/coproc.h
@@ -0,0 +1,160 @@
+/*
+ * 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(" { CRm64(%2lu), Op1(%2lu), is64, func_%s },\n",
+                             p->CRn, 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: %08lx\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: %08lx\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;
+       if (i1->Op2 != i2->Op2)
+               return i1->Op2 - i2->Op2;
+       return i2->is_64 - i1->is_64;
+}
+
+
+#define CRn(_x)                .CRn = _x
+#define CRm(_x)        .CRm = _x
+#define CRm64(_x)       .CRn = _x, .CRm = 0
+#define Op1(_x)        .Op1 = _x
+#define Op2(_x)        .Op2 = _x
+#define is64           .is_64 = true
+#define is32           .is_64 = false
+
+bool access_vm_reg(struct kvm_vcpu *vcpu,
+                  const struct coproc_params *p,
+                  const struct coproc_reg *r);
+
+#endif /* __ARM_KVM_COPROC_LOCAL_H__ */