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From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
To: linux-crypto@vger.kernel.org
Cc: herbert@gondor.apana.org.au,
	linux-arm-kernel@lists.infradead.org,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Dave Martin <Dave.Martin@arm.com>,
	Russell King - ARM Linux <linux@armlinux.org.uk>,
	Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
	Mark Rutland <mark.rutland@arm.com>,
	linux-rt-users@vger.kernel.org,
	Peter Zijlstra <peterz@infradead.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will.deacon@arm.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: [PATCH v3 20/20] DO NOT MERGE
Date: Wed,  6 Dec 2017 19:43:46 +0000	[thread overview]
Message-ID: <20171206194346.24393-21-ard.biesheuvel@linaro.org> (raw)
In-Reply-To: <20171206194346.24393-1-ard.biesheuvel@linaro.org>

Test code to force a kernel_neon_end+begin sequence at every yield point,
and wipe the entire NEON state before resuming the algorithm.
---
 arch/arm64/include/asm/assembler.h | 33 ++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h
index c54e408fd5a7..7072c29b4e83 100644
--- a/arch/arm64/include/asm/assembler.h
+++ b/arch/arm64/include/asm/assembler.h
@@ -607,6 +607,7 @@ alternative_else_nop_endif
 	cmp		w1, #1 // == PREEMPT_OFFSET
 	csel		x0, x0, xzr, eq
 	tbnz		x0, #TIF_NEED_RESCHED, 5555f	// needs rescheduling?
+	b		5555f
 #endif
 	.subsection	1
 5555:
@@ -615,6 +616,38 @@ alternative_else_nop_endif
 	.macro		do_cond_yield_neon
 	bl		kernel_neon_end
 	bl		kernel_neon_begin
+	movi		v0.16b, #0x55
+	movi		v1.16b, #0x55
+	movi		v2.16b, #0x55
+	movi		v3.16b, #0x55
+	movi		v4.16b, #0x55
+	movi		v5.16b, #0x55
+	movi		v6.16b, #0x55
+	movi		v7.16b, #0x55
+	movi		v8.16b, #0x55
+	movi		v9.16b, #0x55
+	movi		v10.16b, #0x55
+	movi		v11.16b, #0x55
+	movi		v12.16b, #0x55
+	movi		v13.16b, #0x55
+	movi		v14.16b, #0x55
+	movi		v15.16b, #0x55
+	movi		v16.16b, #0x55
+	movi		v17.16b, #0x55
+	movi		v18.16b, #0x55
+	movi		v19.16b, #0x55
+	movi		v20.16b, #0x55
+	movi		v21.16b, #0x55
+	movi		v22.16b, #0x55
+	movi		v23.16b, #0x55
+	movi		v24.16b, #0x55
+	movi		v25.16b, #0x55
+	movi		v26.16b, #0x55
+	movi		v27.16b, #0x55
+	movi		v28.16b, #0x55
+	movi		v29.16b, #0x55
+	movi		v30.16b, #0x55
+	movi		v31.16b, #0x55
 	.endm
 
 	.macro		endif_yield_neon, lbl=6666f
-- 
2.11.0


WARNING: multiple messages have this Message-ID (diff)
From: ard.biesheuvel@linaro.org (Ard Biesheuvel)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 20/20] DO NOT MERGE
Date: Wed,  6 Dec 2017 19:43:46 +0000	[thread overview]
Message-ID: <20171206194346.24393-21-ard.biesheuvel@linaro.org> (raw)
In-Reply-To: <20171206194346.24393-1-ard.biesheuvel@linaro.org>

Test code to force a kernel_neon_end+begin sequence at every yield point,
and wipe the entire NEON state before resuming the algorithm.
---
 arch/arm64/include/asm/assembler.h | 33 ++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h
index c54e408fd5a7..7072c29b4e83 100644
--- a/arch/arm64/include/asm/assembler.h
+++ b/arch/arm64/include/asm/assembler.h
@@ -607,6 +607,7 @@ alternative_else_nop_endif
 	cmp		w1, #1 // == PREEMPT_OFFSET
 	csel		x0, x0, xzr, eq
 	tbnz		x0, #TIF_NEED_RESCHED, 5555f	// needs rescheduling?
+	b		5555f
 #endif
 	.subsection	1
 5555:
@@ -615,6 +616,38 @@ alternative_else_nop_endif
 	.macro		do_cond_yield_neon
 	bl		kernel_neon_end
 	bl		kernel_neon_begin
+	movi		v0.16b, #0x55
+	movi		v1.16b, #0x55
+	movi		v2.16b, #0x55
+	movi		v3.16b, #0x55
+	movi		v4.16b, #0x55
+	movi		v5.16b, #0x55
+	movi		v6.16b, #0x55
+	movi		v7.16b, #0x55
+	movi		v8.16b, #0x55
+	movi		v9.16b, #0x55
+	movi		v10.16b, #0x55
+	movi		v11.16b, #0x55
+	movi		v12.16b, #0x55
+	movi		v13.16b, #0x55
+	movi		v14.16b, #0x55
+	movi		v15.16b, #0x55
+	movi		v16.16b, #0x55
+	movi		v17.16b, #0x55
+	movi		v18.16b, #0x55
+	movi		v19.16b, #0x55
+	movi		v20.16b, #0x55
+	movi		v21.16b, #0x55
+	movi		v22.16b, #0x55
+	movi		v23.16b, #0x55
+	movi		v24.16b, #0x55
+	movi		v25.16b, #0x55
+	movi		v26.16b, #0x55
+	movi		v27.16b, #0x55
+	movi		v28.16b, #0x55
+	movi		v29.16b, #0x55
+	movi		v30.16b, #0x55
+	movi		v31.16b, #0x55
 	.endm
 
 	.macro		endif_yield_neon, lbl=6666f
-- 
2.11.0

  parent reply	other threads:[~2017-12-06 19:43 UTC|newest]

Thread overview: 62+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-06 19:43 [PATCH v3 00/20] crypto: arm64 - play nice with CONFIG_PREEMPT Ard Biesheuvel
2017-12-06 19:43 ` Ard Biesheuvel
2017-12-06 19:43 ` [PATCH v3 01/20] crypto: testmgr - add a new test case for CRC-T10DIF Ard Biesheuvel
2017-12-06 19:43   ` Ard Biesheuvel
2017-12-06 19:43 ` [PATCH v3 02/20] crypto: arm64/aes-ce-ccm - move kernel mode neon en/disable into loop Ard Biesheuvel
2017-12-06 19:43   ` Ard Biesheuvel
2017-12-06 19:43 ` [PATCH v3 03/20] crypto: arm64/aes-blk " Ard Biesheuvel
2017-12-06 19:43   ` Ard Biesheuvel
2017-12-06 19:43 ` [PATCH v3 04/20] crypto: arm64/aes-bs " Ard Biesheuvel
2017-12-06 19:43   ` Ard Biesheuvel
2017-12-06 19:43 ` [PATCH v3 05/20] crypto: arm64/chacha20 " Ard Biesheuvel
2017-12-06 19:43   ` Ard Biesheuvel
2017-12-06 19:43 ` [PATCH v3 06/20] crypto: arm64/aes-blk - remove configurable interleave Ard Biesheuvel
2017-12-06 19:43   ` Ard Biesheuvel
2017-12-06 19:43 ` [PATCH v3 07/20] crypto: arm64/aes-blk - add 4 way interleave to CBC encrypt path Ard Biesheuvel
2017-12-06 19:43   ` Ard Biesheuvel
2017-12-06 19:43 ` [PATCH v3 08/20] crypto: arm64/aes-blk - add 4 way interleave to CBC-MAC " Ard Biesheuvel
2017-12-06 19:43   ` Ard Biesheuvel
2017-12-06 19:43 ` [PATCH v3 09/20] crypto: arm64/sha256-neon - play nice with CONFIG_PREEMPT kernels Ard Biesheuvel
2017-12-06 19:43   ` Ard Biesheuvel
2017-12-06 19:43 ` [PATCH v3 10/20] arm64: assembler: add utility macros to push/pop stack frames Ard Biesheuvel
2017-12-06 19:43   ` Ard Biesheuvel
2017-12-07 14:11   ` Dave Martin
2017-12-07 14:11     ` Dave Martin
2017-12-07 14:21     ` Ard Biesheuvel
2017-12-07 14:21       ` Ard Biesheuvel
2017-12-07 14:53       ` Dave Martin
2017-12-07 14:53         ` Dave Martin
2017-12-07 14:58         ` Ard Biesheuvel
2017-12-07 14:58           ` Ard Biesheuvel
2017-12-06 19:43 ` [PATCH v3 11/20] arm64: assembler: add macros to conditionally yield the NEON under PREEMPT Ard Biesheuvel
2017-12-06 19:43   ` Ard Biesheuvel
2017-12-07 14:39   ` Dave Martin
2017-12-07 14:39     ` Dave Martin
2017-12-07 14:50     ` Ard Biesheuvel
2017-12-07 14:50       ` Ard Biesheuvel
2017-12-07 15:47       ` Ard Biesheuvel
2017-12-07 15:47         ` Ard Biesheuvel
2017-12-07 15:51         ` Ard Biesheuvel
2017-12-07 15:51           ` Ard Biesheuvel
2017-12-07 16:15         ` Dave Martin
2017-12-07 16:15           ` Dave Martin
2017-12-07 16:11       ` Dave Martin
2017-12-07 16:11         ` Dave Martin
2017-12-06 19:43 ` [PATCH v3 12/20] crypto: arm64/sha1-ce - yield NEON after every block of input Ard Biesheuvel
2017-12-06 19:43   ` Ard Biesheuvel
2017-12-06 19:43 ` [PATCH v3 13/20] crypto: arm64/sha2-ce " Ard Biesheuvel
2017-12-06 19:43   ` Ard Biesheuvel
2017-12-06 19:43 ` [PATCH v3 14/20] crypto: arm64/aes-ccm " Ard Biesheuvel
2017-12-06 19:43   ` Ard Biesheuvel
2017-12-06 19:43 ` [PATCH v3 15/20] crypto: arm64/aes-blk " Ard Biesheuvel
2017-12-06 19:43   ` Ard Biesheuvel
2017-12-06 19:43 ` [PATCH v3 16/20] crypto: arm64/aes-bs " Ard Biesheuvel
2017-12-06 19:43   ` Ard Biesheuvel
2017-12-06 19:43 ` [PATCH v3 17/20] crypto: arm64/aes-ghash " Ard Biesheuvel
2017-12-06 19:43   ` Ard Biesheuvel
2017-12-06 19:43 ` [PATCH v3 18/20] crypto: arm64/crc32-ce " Ard Biesheuvel
2017-12-06 19:43   ` Ard Biesheuvel
2017-12-06 19:43 ` [PATCH v3 19/20] crypto: arm64/crct10dif-ce " Ard Biesheuvel
2017-12-06 19:43   ` Ard Biesheuvel
2017-12-06 19:43 ` Ard Biesheuvel [this message]
2017-12-06 19:43   ` [PATCH v3 20/20] DO NOT MERGE Ard Biesheuvel

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