4 files changed, 144 insertions, 46 deletions

diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h
index 143875c6c95..4d6fa0bf130 100644
--- a/arch/mips/include/asm/kvm_host.h
+++ b/arch/mips/include/asm/kvm_host.h
@@ -496,10 +496,6 @@ struct kvm_mips_callbacks {
 			    uint32_t cause);
 	int (*irq_clear) (struct kvm_vcpu *vcpu, unsigned int priority,
 			  uint32_t cause);
-	int (*vcpu_ioctl_get_regs) (struct kvm_vcpu *vcpu,
-				    struct kvm_regs *regs);
-	int (*vcpu_ioctl_set_regs) (struct kvm_vcpu *vcpu,
-				    struct kvm_regs *regs);
 };
 extern struct kvm_mips_callbacks *kvm_mips_callbacks;
 int kvm_mips_emulation_init(struct kvm_mips_callbacks **install_callbacks);
diff --git a/arch/mips/include/asm/ptrace.h b/arch/mips/include/asm/ptrace.h
index a3186f2bb8a..5e6cd094739 100644
--- a/arch/mips/include/asm/ptrace.h
+++ b/arch/mips/include/asm/ptrace.h
@@ -16,6 +16,38 @@
 #include <asm/isadep.h>
 #include <uapi/asm/ptrace.h>
 
+/*
+ * This struct defines the way the registers are stored on the stack during a
+ * system call/exception. As usual the registers k0/k1 aren't being saved.
+ */
+struct pt_regs {
+#ifdef CONFIG_32BIT
+	/* Pad bytes for argument save space on the stack. */
+	unsigned long pad0[6];
+#endif
+
+	/* Saved main processor registers. */
+	unsigned long regs[32];
+
+	/* Saved special registers. */
+	unsigned long cp0_status;
+	unsigned long hi;
+	unsigned long lo;
+#ifdef CONFIG_CPU_HAS_SMARTMIPS
+	unsigned long acx;
+#endif
+	unsigned long cp0_badvaddr;
+	unsigned long cp0_cause;
+	unsigned long cp0_epc;
+#ifdef CONFIG_MIPS_MT_SMTC
+	unsigned long cp0_tcstatus;
+#endif /* CONFIG_MIPS_MT_SMTC */
+#ifdef CONFIG_CPU_CAVIUM_OCTEON
+	unsigned long long mpl[3];	  /* MTM{0,1,2} */
+	unsigned long long mtp[3];	  /* MTP{0,1,2} */
+#endif
+} __aligned(8);
+
 struct task_struct;
 
 extern int ptrace_getregs(struct task_struct *child, __s64 __user *data);
diff --git a/arch/mips/include/uapi/asm/kvm.h b/arch/mips/include/uapi/asm/kvm.h
index 85789eacbf1..3f424f5217d 100644
--- a/arch/mips/include/uapi/asm/kvm.h
+++ b/arch/mips/include/uapi/asm/kvm.h
@@ -1,55 +1,138 @@
 /*
-* This file is subject to the terms and conditions of the GNU General Public
-* License.  See the file "COPYING" in the main directory of this archive
-* for more details.
-*
-* Copyright (C) 2012  MIPS Technologies, Inc.  All rights reserved.
-* Authors: Sanjay Lal <sanjayl@kymasys.com>
-*/
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2012  MIPS Technologies, Inc.  All rights reserved.
+ * Copyright (C) 2013 Cavium, Inc.
+ * Authors: Sanjay Lal <sanjayl@kymasys.com>
+ */
 
 #ifndef __LINUX_KVM_MIPS_H
 #define __LINUX_KVM_MIPS_H
 
 #include <linux/types.h>
 
-#define __KVM_MIPS
-
-#define N_MIPS_COPROC_REGS      32
-#define N_MIPS_COPROC_SEL   	8
+/*
+ * KVM MIPS specific structures and definitions.
+ *
+ * Some parts derived from the x86 version of this file.
+ */
 
-/* for KVM_GET_REGS and KVM_SET_REGS */
+/*
+ * for KVM_GET_REGS and KVM_SET_REGS
+ *
+ * If Config[AT] is zero (32-bit CPU), the register contents are
+ * stored in the lower 32-bits of the struct kvm_regs fields and sign
+ * extended to 64-bits.
+ */
 struct kvm_regs {
-	__u32 gprs[32];
-	__u32 hi;
-	__u32 lo;
-	__u32 pc;
-
-	__u32 cp0reg[N_MIPS_COPROC_REGS][N_MIPS_COPROC_SEL];
-};
-
-/* for KVM_GET_SREGS and KVM_SET_SREGS */
-struct kvm_sregs {
+	/* out (KVM_GET_REGS) / in (KVM_SET_REGS) */
+	__u64 gpr[32];
+	__u64 hi;
+	__u64 lo;
+	__u64 pc;
 };
 
-/* for KVM_GET_FPU and KVM_SET_FPU */
+/*
+ * for KVM_GET_FPU and KVM_SET_FPU
+ *
+ * If Status[FR] is zero (32-bit FPU), the upper 32-bits of the FPRs
+ * are zero filled.
+ */
 struct kvm_fpu {
+	__u64 fpr[32];
+	__u32 fir;
+	__u32 fccr;
+	__u32 fexr;
+	__u32 fenr;
+	__u32 fcsr;
+	__u32 pad;
 };
 
+
+/*
+ * For MIPS, we use KVM_SET_ONE_REG and KVM_GET_ONE_REG to access CP0
+ * registers.  The id field is broken down as follows:
+ *
+ *  bits[2..0]   - Register 'sel' index.
+ *  bits[7..3]   - Register 'rd'  index.
+ *  bits[15..8]  - Must be zero.
+ *  bits[63..16] - 1 -> CP0 registers.
+ *
+ * Other sets registers may be added in the future.  Each set would
+ * have its own identifier in bits[63..16].
+ *
+ * The addr field of struct kvm_one_reg must point to an aligned
+ * 64-bit wide location.  For registers that are narrower than
+ * 64-bits, the value is stored in the low order bits of the location,
+ * and sign extended to 64-bits.
+ *
+ * The registers defined in struct kvm_regs are also accessible, the
+ * id values for these are below.
+ */
+
+#define KVM_REG_MIPS_R0 0
+#define KVM_REG_MIPS_R1 1
+#define KVM_REG_MIPS_R2 2
+#define KVM_REG_MIPS_R3 3
+#define KVM_REG_MIPS_R4 4
+#define KVM_REG_MIPS_R5 5
+#define KVM_REG_MIPS_R6 6
+#define KVM_REG_MIPS_R7 7
+#define KVM_REG_MIPS_R8 8
+#define KVM_REG_MIPS_R9 9
+#define KVM_REG_MIPS_R10 10
+#define KVM_REG_MIPS_R11 11
+#define KVM_REG_MIPS_R12 12
+#define KVM_REG_MIPS_R13 13
+#define KVM_REG_MIPS_R14 14
+#define KVM_REG_MIPS_R15 15
+#define KVM_REG_MIPS_R16 16
+#define KVM_REG_MIPS_R17 17
+#define KVM_REG_MIPS_R18 18
+#define KVM_REG_MIPS_R19 19
+#define KVM_REG_MIPS_R20 20
+#define KVM_REG_MIPS_R21 21
+#define KVM_REG_MIPS_R22 22
+#define KVM_REG_MIPS_R23 23
+#define KVM_REG_MIPS_R24 24
+#define KVM_REG_MIPS_R25 25
+#define KVM_REG_MIPS_R26 26
+#define KVM_REG_MIPS_R27 27
+#define KVM_REG_MIPS_R28 28
+#define KVM_REG_MIPS_R29 29
+#define KVM_REG_MIPS_R30 30
+#define KVM_REG_MIPS_R31 31
+
+#define KVM_REG_MIPS_HI 32
+#define KVM_REG_MIPS_LO 33
+#define KVM_REG_MIPS_PC 34
+
+/*
+ * KVM MIPS specific structures and definitions
+ *
+ */
 struct kvm_debug_exit_arch {
+	__u64 epc;
 };
 
 /* for KVM_SET_GUEST_DEBUG */
 struct kvm_guest_debug_arch {
 };
 
+/* definition of registers in kvm_run */
+struct kvm_sync_regs {
+};
+
+/* dummy definition */
+struct kvm_sregs {
+};
+
 struct kvm_mips_interrupt {
 	/* in */
 	__u32 cpu;
 	__u32 irq;
 };
 
-/* definition of registers in kvm_run */
-struct kvm_sync_regs {
-};
-
 #endif /* __LINUX_KVM_MIPS_H */
diff --git a/arch/mips/include/uapi/asm/ptrace.h b/arch/mips/include/uapi/asm/ptrace.h
index 4d58d846870..b26f7e31727 100644
--- a/arch/mips/include/uapi/asm/ptrace.h
+++ b/arch/mips/include/uapi/asm/ptrace.h
@@ -22,16 +22,12 @@
 #define DSP_CONTROL	77
 #define ACX		78
 
+#ifndef __KERNEL__
 /*
  * This struct defines the way the registers are stored on the stack during a
  * system call/exception. As usual the registers k0/k1 aren't being saved.
  */
 struct pt_regs {
-#ifdef CONFIG_32BIT
-	/* Pad bytes for argument save space on the stack. */
-	unsigned long pad0[6];
-#endif
-
 	/* Saved main processor registers. */
 	unsigned long regs[32];
 
@@ -39,20 +35,11 @@ struct pt_regs {
 	unsigned long cp0_status;
 	unsigned long hi;
 	unsigned long lo;
-#ifdef CONFIG_CPU_HAS_SMARTMIPS
-	unsigned long acx;
-#endif
 	unsigned long cp0_badvaddr;
 	unsigned long cp0_cause;
 	unsigned long cp0_epc;
-#ifdef CONFIG_MIPS_MT_SMTC
-	unsigned long cp0_tcstatus;
-#endif /* CONFIG_MIPS_MT_SMTC */
-#ifdef CONFIG_CPU_CAVIUM_OCTEON
-	unsigned long long mpl[3];	  /* MTM{0,1,2} */
-	unsigned long long mtp[3];	  /* MTP{0,1,2} */
-#endif
 } __attribute__ ((aligned (8)));
+#endif /* __KERNEL__ */
 
 /* Arbitrarily choose the same ptrace numbers as used by the Sparc code. */
 #define PTRACE_GETREGS		12