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 v2 19/19] DO NOT MERGE
Date: Mon, 4 Dec 2017 12:26:45 +0000 [thread overview]
Message-ID: <20171204122645.31535-20-ard.biesheuvel@linaro.org> (raw)
In-Reply-To: <20171204122645.31535-1-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 917b026d3e00..dfee20246592 100644
--- a/arch/arm64/include/asm/assembler.h
+++ b/arch/arm64/include/asm/assembler.h
@@ -549,6 +549,7 @@ alternative_else_nop_endif
cmp w1, #1 // == PREEMPT_OFFSET
csel x0, x0, xzr, eq
tbnz x0, #TIF_NEED_RESCHED, 5555f // needs rescheduling?
+ b 5555f
4444:
#endif
.subsection 1
@@ -558,6 +559,38 @@ alternative_else_nop_endif
.macro yield_neon_post, lbl:req
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
b \lbl
.previous
.endm
--
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 v2 19/19] DO NOT MERGE
Date: Mon, 4 Dec 2017 12:26:45 +0000 [thread overview]
Message-ID: <20171204122645.31535-20-ard.biesheuvel@linaro.org> (raw)
In-Reply-To: <20171204122645.31535-1-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 917b026d3e00..dfee20246592 100644
--- a/arch/arm64/include/asm/assembler.h
+++ b/arch/arm64/include/asm/assembler.h
@@ -549,6 +549,7 @@ alternative_else_nop_endif
cmp w1, #1 // == PREEMPT_OFFSET
csel x0, x0, xzr, eq
tbnz x0, #TIF_NEED_RESCHED, 5555f // needs rescheduling?
+ b 5555f
4444:
#endif
.subsection 1
@@ -558,6 +559,38 @@ alternative_else_nop_endif
.macro yield_neon_post, lbl:req
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
b \lbl
.previous
.endm
--
2.11.0
next prev parent reply other threads:[~2017-12-04 12:27 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-04 12:26 [PATCH v2 00/19] crypto: arm64 - play nice with CONFIG_PREEMPT Ard Biesheuvel
2017-12-04 12:26 ` Ard Biesheuvel
2017-12-04 12:26 ` [PATCH v2 01/19] crypto: testmgr - add a new test case for CRC-T10DIF Ard Biesheuvel
2017-12-04 12:26 ` Ard Biesheuvel
2017-12-04 12:26 ` [PATCH v2 02/19] crypto: arm64/aes-ce-ccm - move kernel mode neon en/disable into loop Ard Biesheuvel
2017-12-04 12:26 ` Ard Biesheuvel
2017-12-04 12:26 ` [PATCH v2 03/19] crypto: arm64/aes-blk " Ard Biesheuvel
2017-12-04 12:26 ` Ard Biesheuvel
2017-12-04 12:26 ` [PATCH v2 04/19] crypto: arm64/aes-bs " Ard Biesheuvel
2017-12-04 12:26 ` Ard Biesheuvel
2017-12-04 12:26 ` [PATCH v2 05/19] crypto: arm64/chacha20 " Ard Biesheuvel
2017-12-04 12:26 ` Ard Biesheuvel
2017-12-04 12:26 ` [PATCH v2 06/19] crypto: arm64/ghash " Ard Biesheuvel
2017-12-04 12:26 ` Ard Biesheuvel
2017-12-04 12:26 ` [PATCH v2 07/19] crypto: arm64/aes-blk - remove configurable interleave Ard Biesheuvel
2017-12-04 12:26 ` Ard Biesheuvel
2017-12-04 12:26 ` [PATCH v2 08/19] crypto: arm64/aes-blk - add 4 way interleave to CBC encrypt path Ard Biesheuvel
2017-12-04 12:26 ` Ard Biesheuvel
2017-12-04 12:26 ` [PATCH v2 09/19] crypto: arm64/aes-blk - add 4 way interleave to CBC-MAC " Ard Biesheuvel
2017-12-04 12:26 ` Ard Biesheuvel
2017-12-04 12:26 ` [PATCH v2 10/19] crypto: arm64/sha256-neon - play nice with CONFIG_PREEMPT kernels Ard Biesheuvel
2017-12-04 12:26 ` Ard Biesheuvel
2017-12-04 12:26 ` [PATCH v2 11/19] arm64: assembler: add macro to conditionally yield the NEON under PREEMPT Ard Biesheuvel
2017-12-04 12:26 ` Ard Biesheuvel
2017-12-05 12:28 ` Dave Martin
2017-12-05 12:28 ` Dave Martin
2017-12-05 12:45 ` Ard Biesheuvel
2017-12-05 12:45 ` Ard Biesheuvel
2017-12-05 18:04 ` Ard Biesheuvel
2017-12-05 18:04 ` Ard Biesheuvel
2017-12-06 11:51 ` Dave Martin
2017-12-06 11:51 ` Dave Martin
2017-12-06 11:57 ` Ard Biesheuvel
2017-12-06 11:57 ` Ard Biesheuvel
2017-12-06 12:12 ` Dave P Martin
2017-12-06 12:12 ` Dave P Martin
2017-12-06 12:25 ` Ard Biesheuvel
2017-12-06 12:25 ` Ard Biesheuvel
2017-12-06 14:37 ` Dave Martin
2017-12-06 14:37 ` Dave Martin
2017-12-04 12:26 ` [PATCH v2 12/19] crypto: arm64/sha1-ce - yield every 8 blocks of input Ard Biesheuvel
2017-12-04 12:26 ` Ard Biesheuvel
2017-12-04 12:26 ` [PATCH v2 13/19] crypto: arm64/sha2-ce " Ard Biesheuvel
2017-12-04 12:26 ` Ard Biesheuvel
2017-12-04 12:26 ` [PATCH v2 14/19] crypto: arm64/aes-blk - yield after processing a fixed chunk " Ard Biesheuvel
2017-12-04 12:26 ` Ard Biesheuvel
2017-12-04 12:26 ` [PATCH v2 15/19] crypto: arm64/aes-bs - yield after processing each 128 bytes " Ard Biesheuvel
2017-12-04 12:26 ` Ard Biesheuvel
2017-12-04 12:26 ` [PATCH v2 16/19] crypto: arm64/aes-ghash - yield after processing fixed number of blocks Ard Biesheuvel
2017-12-04 12:26 ` Ard Biesheuvel
2017-12-04 12:26 ` [PATCH v2 17/19] crypto: arm64/crc32-ce - yield NEON every 16 blocks of input Ard Biesheuvel
2017-12-04 12:26 ` Ard Biesheuvel
2017-12-04 12:26 ` [PATCH v2 18/19] crypto: arm64/crct10dif-ce - yield NEON every 8 " Ard Biesheuvel
2017-12-04 12:26 ` Ard Biesheuvel
2017-12-04 12:26 ` Ard Biesheuvel [this message]
2017-12-04 12:26 ` [PATCH v2 19/19] DO NOT MERGE Ard Biesheuvel
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