arm64: move FP-SIMD save/restore code to a macro

In order to be able to reuse the save-restore code in KVM, move
it to a pair of macros, similar to what the 32bit code does.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

diff --git a/arch/arm64/include/asm/fpsimdmacros.h b/arch/arm64/include/asm/fpsimdmacros.h
new file mode 100644 (file)
index 0000000..bbec599
--- /dev/null
+++ b/arch/arm64/include/asm/fpsimdmacros.h
@@ -0,0 +1,64 @@
+/*
+ * FP/SIMD state saving and restoring macros
+ *
+ * Copyright (C) 2012 ARM Ltd.
+ * Author: Catalin Marinas <catalin.marinas@arm.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, see <http://www.gnu.org/licenses/>.
+ */
+
+.macro fpsimd_save state, tmpnr
+       stp     q0, q1, [\state, #16 * 0]
+       stp     q2, q3, [\state, #16 * 2]
+       stp     q4, q5, [\state, #16 * 4]
+       stp     q6, q7, [\state, #16 * 6]
+       stp     q8, q9, [\state, #16 * 8]
+       stp     q10, q11, [\state, #16 * 10]
+       stp     q12, q13, [\state, #16 * 12]
+       stp     q14, q15, [\state, #16 * 14]
+       stp     q16, q17, [\state, #16 * 16]
+       stp     q18, q19, [\state, #16 * 18]
+       stp     q20, q21, [\state, #16 * 20]
+       stp     q22, q23, [\state, #16 * 22]
+       stp     q24, q25, [\state, #16 * 24]
+       stp     q26, q27, [\state, #16 * 26]
+       stp     q28, q29, [\state, #16 * 28]
+       stp     q30, q31, [\state, #16 * 30]!
+       mrs     x\tmpnr, fpsr
+       str     w\tmpnr, [\state, #16 * 2]
+       mrs     x\tmpnr, fpcr
+       str     w\tmpnr, [\state, #16 * 2 + 4]
+.endm
+
+.macro fpsimd_restore state, tmpnr
+       ldp     q0, q1, [\state, #16 * 0]
+       ldp     q2, q3, [\state, #16 * 2]
+       ldp     q4, q5, [\state, #16 * 4]
+       ldp     q6, q7, [\state, #16 * 6]
+       ldp     q8, q9, [\state, #16 * 8]
+       ldp     q10, q11, [\state, #16 * 10]
+       ldp     q12, q13, [\state, #16 * 12]
+       ldp     q14, q15, [\state, #16 * 14]
+       ldp     q16, q17, [\state, #16 * 16]
+       ldp     q18, q19, [\state, #16 * 18]
+       ldp     q20, q21, [\state, #16 * 20]
+       ldp     q22, q23, [\state, #16 * 22]
+       ldp     q24, q25, [\state, #16 * 24]
+       ldp     q26, q27, [\state, #16 * 26]
+       ldp     q28, q29, [\state, #16 * 28]
+       ldp     q30, q31, [\state, #16 * 30]!
+       ldr     w\tmpnr, [\state, #16 * 2]
+       msr     fpsr, x\tmpnr
+       ldr     w\tmpnr, [\state, #16 * 2 + 4]
+       msr     fpcr, x\tmpnr
+.endm

diff --git a/arch/arm64/kernel/entry-fpsimd.S b/arch/arm64/kernel/entry-fpsimd.S
index 17988a6e7ea29fca8b3ed343c74d3f9223c6f655..6a27cd6dbfa6dd81be8a6042e5366262a8146801 100644 (file)
--- a/arch/arm64/kernel/entry-fpsimd.S
+++ b/arch/arm64/kernel/entry-fpsimd.S
@@ -20,6 +20,7 @@
 #include <linux/linkage.h>
 
 #include <asm/assembler.h>
+#include <asm/fpsimdmacros.h>
 
 /*
  * Save the FP registers.
@@ -27,26 +28,7 @@
  * x0 - pointer to struct fpsimd_state
  */
 ENTRY(fpsimd_save_state)
-       stp     q0, q1, [x0, #16 * 0]
-       stp     q2, q3, [x0, #16 * 2]
-       stp     q4, q5, [x0, #16 * 4]
-       stp     q6, q7, [x0, #16 * 6]
-       stp     q8, q9, [x0, #16 * 8]
-       stp     q10, q11, [x0, #16 * 10]
-       stp     q12, q13, [x0, #16 * 12]
-       stp     q14, q15, [x0, #16 * 14]
-       stp     q16, q17, [x0, #16 * 16]
-       stp     q18, q19, [x0, #16 * 18]
-       stp     q20, q21, [x0, #16 * 20]
-       stp     q22, q23, [x0, #16 * 22]
-       stp     q24, q25, [x0, #16 * 24]
-       stp     q26, q27, [x0, #16 * 26]
-       stp     q28, q29, [x0, #16 * 28]
-       stp     q30, q31, [x0, #16 * 30]!
-       mrs     x8, fpsr
-       str     w8, [x0, #16 * 2]
-       mrs     x8, fpcr
-       str     w8, [x0, #16 * 2 + 4]
+       fpsimd_save x0, 8
        ret
 ENDPROC(fpsimd_save_state)
 
@@ -56,25 +38,6 @@ ENDPROC(fpsimd_save_state)
  * x0 - pointer to struct fpsimd_state
  */
 ENTRY(fpsimd_load_state)
-       ldp     q0, q1, [x0, #16 * 0]
-       ldp     q2, q3, [x0, #16 * 2]
-       ldp     q4, q5, [x0, #16 * 4]
-       ldp     q6, q7, [x0, #16 * 6]
-       ldp     q8, q9, [x0, #16 * 8]
-       ldp     q10, q11, [x0, #16 * 10]
-       ldp     q12, q13, [x0, #16 * 12]
-       ldp     q14, q15, [x0, #16 * 14]
-       ldp     q16, q17, [x0, #16 * 16]
-       ldp     q18, q19, [x0, #16 * 18]
-       ldp     q20, q21, [x0, #16 * 20]
-       ldp     q22, q23, [x0, #16 * 22]
-       ldp     q24, q25, [x0, #16 * 24]
-       ldp     q26, q27, [x0, #16 * 26]
-       ldp     q28, q29, [x0, #16 * 28]
-       ldp     q30, q31, [x0, #16 * 30]!
-       ldr     w8, [x0, #16 * 2]
-       ldr     w9, [x0, #16 * 2 + 4]
-       msr     fpsr, x8
-       msr     fpcr, x9
+       fpsimd_restore x0, 8
        ret
 ENDPROC(fpsimd_load_state)