From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
To: linux-kernel@vger.kernel.org
Cc: 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 v4 20/20] DO NOT MERGE
Date: Tue, 26 Dec 2017 10:29:40 +0000 [thread overview]
Message-ID: <20171226102940.26908-21-ard.biesheuvel@linaro.org> (raw)
In-Reply-To: <20171226102940.26908-1-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 575d0f065d28..295937b2f39b 100644
--- a/arch/arm64/include/asm/assembler.h
+++ b/arch/arm64/include/asm/assembler.h
@@ -622,6 +622,7 @@ alternative_else_nop_endif
cmp w1, #PREEMPT_DISABLE_OFFSET
csel x0, x0, xzr, eq
tbnz x0, #TIF_NEED_RESCHED, .Lyield_\@ // needs rescheduling?
+ b .Lyield_\@
#endif
/* fall through to endif_yield_neon */
.subsection 1
@@ -631,6 +632,38 @@ 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
--
2.11.0
next prev parent reply other threads:[~2017-12-26 10:31 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-26 10:29 [PATCH v4 00/20] crypto: arm64 - play nice with CONFIG_PREEMPT Ard Biesheuvel
2017-12-26 10:29 ` [PATCH v4 01/20] crypto: testmgr - add a new test case for CRC-T10DIF Ard Biesheuvel
2017-12-26 10:29 ` [PATCH v4 02/20] crypto: arm64/aes-ce-ccm - move kernel mode neon en/disable into loop Ard Biesheuvel
2017-12-26 10:29 ` [PATCH v4 03/20] crypto: arm64/aes-blk " Ard Biesheuvel
2017-12-26 10:29 ` [PATCH v4 04/20] crypto: arm64/aes-bs " Ard Biesheuvel
2017-12-26 10:29 ` [PATCH v4 05/20] crypto: arm64/chacha20 " Ard Biesheuvel
2017-12-26 10:29 ` [PATCH v4 06/20] crypto: arm64/aes-blk - remove configurable interleave Ard Biesheuvel
2017-12-26 10:29 ` [PATCH v4 07/20] crypto: arm64/aes-blk - add 4 way interleave to CBC encrypt path Ard Biesheuvel
2017-12-26 10:29 ` [PATCH v4 08/20] crypto: arm64/aes-blk - add 4 way interleave to CBC-MAC " Ard Biesheuvel
2017-12-26 10:29 ` [PATCH v4 09/20] crypto: arm64/sha256-neon - play nice with CONFIG_PREEMPT kernels Ard Biesheuvel
2017-12-26 10:29 ` [PATCH v4 10/20] arm64: assembler: add utility macros to push/pop stack frames Ard Biesheuvel
2017-12-26 10:29 ` [PATCH v4 11/20] arm64: assembler: add macros to conditionally yield the NEON under PREEMPT Ard Biesheuvel
2017-12-26 10:29 ` [PATCH v4 12/20] crypto: arm64/sha1-ce - yield NEON after every block of input Ard Biesheuvel
2017-12-26 10:29 ` [PATCH v4 13/20] crypto: arm64/sha2-ce " Ard Biesheuvel
2017-12-26 10:29 ` [PATCH v4 14/20] crypto: arm64/aes-ccm " Ard Biesheuvel
2017-12-26 10:29 ` [PATCH v4 15/20] crypto: arm64/aes-blk " Ard Biesheuvel
2017-12-26 10:29 ` [PATCH v4 16/20] crypto: arm64/aes-bs " Ard Biesheuvel
2017-12-26 10:29 ` [PATCH v4 17/20] crypto: arm64/aes-ghash " Ard Biesheuvel
2017-12-26 10:29 ` [PATCH v4 18/20] crypto: arm64/crc32-ce " Ard Biesheuvel
2017-12-26 10:29 ` [PATCH v4 19/20] crypto: arm64/crct10dif-ce " Ard Biesheuvel
2017-12-26 10:29 ` Ard Biesheuvel [this message]
2018-02-09 18:02 ` [PATCH v4 00/20] crypto: arm64 - play nice with CONFIG_PREEMPT Sebastian Andrzej Siewior
2018-02-09 19:28 ` Ard Biesheuvel
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