MIPS: Add some missing guest CP0 accessors & defs

Add some missing guest accessors and register field definitions for KVM
for MIPS VZ to make use of.

Guest CP0_LLAddr register accessors and definitions for the LLB field
allow KVM to clear the guest LLB to cancel in-progress LL/SC atomics on
restore, and to emulate accesses by the guest to the CP0_LLAddr
register.

Bitwise modifiers and definitions for the guest CP0_Wired and
CP0_Config1 registers allow KVM to modify fields within the CP0_Wired
and CP0_Config1 registers.

Finally a definition for the CP0_Config5.SBRI bit allows KVM to
initialise and allow modification of the guest version of the SBRI bit.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Acked-by: Ralf Baechle <ralf@linux-mips.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org

diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h
index c20df60..c6b8f96 100644 (file)
--- a/arch/mips/include/asm/mipsregs.h
+++ b/arch/mips/include/asm/mipsregs.h
@@ -219,8 +219,10 @@
 /*
  * Wired register bits
  */
-#define MIPSR6_WIRED_LIMIT     (_ULCAST_(0xffff) << 16)
-#define MIPSR6_WIRED_WIRED     (_ULCAST_(0xffff) << 0)
+#define MIPSR6_WIRED_LIMIT_SHIFT 16
+#define MIPSR6_WIRED_LIMIT     (_ULCAST_(0xffff) << MIPSR6_WIRED_LIMIT_SHIFT)
+#define MIPSR6_WIRED_WIRED_SHIFT 0
+#define MIPSR6_WIRED_WIRED     (_ULCAST_(0xffff) << MIPSR6_WIRED_WIRED_SHIFT)
 
 /*
  * Values used for computation of new tlb entries
@@ -647,6 +649,7 @@
 #define MIPS_CONF5_LLB         (_ULCAST_(1) << 4)
 #define MIPS_CONF5_MVH         (_ULCAST_(1) << 5)
 #define MIPS_CONF5_VP          (_ULCAST_(1) << 7)
+#define MIPS_CONF5_SBRI                (_ULCAST_(1) << 6)
 #define MIPS_CONF5_FRE         (_ULCAST_(1) << 8)
 #define MIPS_CONF5_UFE         (_ULCAST_(1) << 9)
 #define MIPS_CONF5_MSAEN       (_ULCAST_(1) << 27)
@@ -742,6 +745,10 @@
 #define MIPS_CMGCRB_BASE       11
 #define MIPS_CMGCRF_BASE       (~_ULCAST_((1 << MIPS_CMGCRB_BASE) - 1))
 
+/* LLAddr bit definitions */
+#define MIPS_LLADDR_LLB_SHIFT  0
+#define MIPS_LLADDR_LLB                (_ULCAST_(1) << MIPS_LLADDR_LLB_SHIFT)
+
 /*
  * Bits in the MIPS32 Memory Segmentation registers.
  */
@@ -2018,6 +2025,9 @@ do {                                                                      \
 #define write_gc0_config6(val)         __write_32bit_gc0_register(16, 6, val)
 #define write_gc0_config7(val)         __write_32bit_gc0_register(16, 7, val)
 
+#define read_gc0_lladdr()              __read_ulong_gc0_register(17, 0)
+#define write_gc0_lladdr(val)          __write_ulong_gc0_register(17, 0, val)
+
 #define read_gc0_watchlo0()            __read_ulong_gc0_register(18, 0)
 #define read_gc0_watchlo1()            __read_ulong_gc0_register(18, 1)
 #define read_gc0_watchlo2()            __read_ulong_gc0_register(18, 2)
@@ -2702,9 +2712,11 @@ __BUILD_SET_C0(brcm_mode)
  */
 #define __BUILD_SET_GC0(name)  __BUILD_SET_COMMON(gc0_##name)
 
+__BUILD_SET_GC0(wired)
 __BUILD_SET_GC0(status)
 __BUILD_SET_GC0(cause)
 __BUILD_SET_GC0(ebase)
+__BUILD_SET_GC0(config1)
 
 /*
  * Return low 10 bits of ebase.