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MIPS: OCTEON: Save and restore CP2 SHA3 state

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Allocate new save space, and then save/restore the registers if
OCTEON III.

Signed-off-by: David Daney <david.daney@cavium.com>
Signed-off-by: Aleksey Makarov <aleksey.makarov@auriga.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/8935/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
David Daney 2015-01-15 16:11:07 +03:00 committed by Ralf Baechle
parent d6e41525e3
commit 6b3a287e63
3 changed files with 35 additions and 11 deletions
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2
arch/mips/include/asm/processor.h
View File

@ -205,6 +205,8 @@ struct octeon_cop2_state {
unsigned long cop2_gfm_poly;
/* DMFC2 rt, 0x025A; DMFC2 rt, 0x025B - Pass2 */
unsigned long cop2_gfm_result[2];
/* DMFC2 rt, 0x24F, DMFC2 rt, 0x50, OCTEON III */
unsigned long cop2_sha3[2];
};
#define COP2_INIT \
.cp2 = {0,},

1
arch/mips/kernel/asm-offsets.c
View File

@ -383,6 +383,7 @@ void output_octeon_cop2_state_defines(void)
OFFSET(OCTEON_CP2_GFM_RESULT, octeon_cop2_state, cop2_gfm_result);
OFFSET(OCTEON_CP2_HSH_DATW, octeon_cop2_state, cop2_hsh_datw);
OFFSET(OCTEON_CP2_HSH_IVW, octeon_cop2_state, cop2_hsh_ivw);
OFFSET(OCTEON_CP2_SHA3, octeon_cop2_state, cop2_sha3);
OFFSET(THREAD_CP2, task_struct, thread.cp2);
OFFSET(THREAD_CVMSEG, task_struct, thread.cvmseg.cvmseg);
BLANK();

43
arch/mips/kernel/octeon_switch.S
View File

@ -142,6 +142,8 @@
* void octeon_cop2_save(struct octeon_cop2_state *a0)
*/
.align 7
.set push
.set noreorder
LEAF(octeon_cop2_save)
dmfc0 t9, $9,7 /* CvmCtl register. */
@ -152,17 +154,17 @@
dmfc2 t2, 0x0200
sd t0, OCTEON_CP2_CRC_IV(a0)
sd t1, OCTEON_CP2_CRC_LENGTH(a0)
sd t2, OCTEON_CP2_CRC_POLY(a0)
/* Skip next instructions if CvmCtl[NODFA_CP2] set */
bbit1 t9, 28, 1f
sd t2, OCTEON_CP2_CRC_POLY(a0)
/* Save the LLM state */
dmfc2 t0, 0x0402
dmfc2 t1, 0x040A
sd t0, OCTEON_CP2_LLM_DAT(a0)
sd t1, OCTEON_CP2_LLM_DAT+8(a0)
1: bbit1 t9, 26, 3f /* done if CvmCtl[NOCRYPTO] set */
sd t1, OCTEON_CP2_LLM_DAT+8(a0)
/* Save the COP2 crypto state */
/* this part is mostly common to both pass 1 and later revisions */
@ -193,18 +195,20 @@
sd t2, OCTEON_CP2_AES_KEY+16(a0)
dmfc2 t2, 0x0101
sd t3, OCTEON_CP2_AES_KEY+24(a0)
mfc0 t3, $15,0 /* Get the processor ID register */
mfc0 v0, $15,0 /* Get the processor ID register */
sd t0, OCTEON_CP2_AES_KEYLEN(a0)
li t0, 0x000d0000 /* This is the processor ID of Octeon Pass1 */
li v1, 0x000d0000 /* This is the processor ID of Octeon Pass1 */
sd t1, OCTEON_CP2_AES_RESULT(a0)
sd t2, OCTEON_CP2_AES_RESULT+8(a0)
/* Skip to the Pass1 version of the remainder of the COP2 state */
beq t3, t0, 2f
beq v0, v1, 2f
sd t2, OCTEON_CP2_AES_RESULT+8(a0)
/* the non-pass1 state when !CvmCtl[NOCRYPTO] */
dmfc2 t1, 0x0240
dmfc2 t2, 0x0241
ori v1, v1, 0x9500 /* lowest OCTEON III PrId*/
dmfc2 t3, 0x0242
subu v1, v0, v1 /* prid - lowest OCTEON III PrId */
dmfc2 t0, 0x0243
sd t1, OCTEON_CP2_HSH_DATW(a0)
dmfc2 t1, 0x0244
@ -257,8 +261,16 @@
sd t1, OCTEON_CP2_GFM_MULT+8(a0)
sd t2, OCTEON_CP2_GFM_POLY(a0)
sd t3, OCTEON_CP2_GFM_RESULT(a0)
sd t0, OCTEON_CP2_GFM_RESULT+8(a0)
bltz v1, 4f
sd t0, OCTEON_CP2_GFM_RESULT+8(a0)
/* OCTEON III things*/
dmfc2 t0, 0x024F
dmfc2 t1, 0x0050
sd t0, OCTEON_CP2_SHA3(a0)
sd t1, OCTEON_CP2_SHA3+8(a0)
4:
jr ra
nop
2: /* pass 1 special stuff when !CvmCtl[NOCRYPTO] */
dmfc2 t3, 0x0040
@ -284,7 +296,9 @@
3: /* pass 1 or CvmCtl[NOCRYPTO] set */
jr ra
nop
END(octeon_cop2_save)
.set pop
/*
* void octeon_cop2_restore(struct octeon_cop2_state *a0)
@ -349,9 +363,9 @@
ld t2, OCTEON_CP2_AES_RESULT+8(a0)
mfc0 t3, $15,0 /* Get the processor ID register */
dmtc2 t0, 0x0110
li t0, 0x000d0000 /* This is the processor ID of Octeon Pass1 */
li v0, 0x000d0000 /* This is the processor ID of Octeon Pass1 */
dmtc2 t1, 0x0100
bne t0, t3, 3f /* Skip the next stuff for non-pass1 */
bne v0, t3, 3f /* Skip the next stuff for non-pass1 */
dmtc2 t2, 0x0101
/* this code is specific for pass 1 */
@ -379,6 +393,7 @@
3: /* this is post-pass1 code */
ld t2, OCTEON_CP2_HSH_DATW(a0)
ori v0, v0, 0x9500 /* lowest OCTEON III PrId*/
ld t0, OCTEON_CP2_HSH_DATW+8(a0)
ld t1, OCTEON_CP2_HSH_DATW+16(a0)
dmtc2 t2, 0x0240
@ -432,9 +447,15 @@
dmtc2 t2, 0x0259
ld t2, OCTEON_CP2_GFM_RESULT+8(a0)
dmtc2 t0, 0x025E
subu v0, t3, v0 /* prid - lowest OCTEON III PrId */
dmtc2 t1, 0x025A
dmtc2 t2, 0x025B
bltz v0, done_restore
dmtc2 t2, 0x025B
/* OCTEON III things*/
ld t0, OCTEON_CP2_SHA3(a0)
ld t1, OCTEON_CP2_SHA3+8(a0)
dmtc2 t0, 0x0051
dmtc2 t1, 0x0050
done_restore:
jr ra
nop