[v4,20/20] DO NOT MERGE

Message ID	20171226102940.26908-21-ard.biesheuvel@linaro.org
State	Superseded
Headers	show Delivered-To: patch@linaro.org Received-SPF: pass (google.com: best guess record for domain of linux-rt-users-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; 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 Message-Id: <20171226102940.26908-21-ard.biesheuvel@linaro.org> In-Reply-To: <20171226102940.26908-1-ard.biesheuvel@linaro.org> References: <20171226102940.26908-1-ard.biesheuvel@linaro.org> Sender: linux-rt-users-owner@vger.kernel.org Precedence: bulk
Series	crypto: arm64 - play nice with CONFIG_PREEMPT \| expand [v4,00/20] crypto: arm64 - play nice with CONFIG_PREEMPT [v4,04/20] crypto: arm64/aes-bs - move kernel mode neon en/disable into loop [v4,08/20] crypto: arm64/aes-blk - add 4 way interleave to CBC-MAC encrypt path [v4,12/20] crypto: arm64/sha1-ce - yield NEON after every block of input [v4,14/20] crypto: arm64/aes-ccm - yield NEON after every block of input [v4,19/20] crypto: arm64/crct10dif-ce - yield NEON after every block of input [v4,20/20] DO NOT MERGE

Message ID

20171226102940.26908-21-ard.biesheuvel@linaro.org

State

Superseded

Headers

Received-SPF: pass (google.com: best guess record for domain of
	linux-rt-users-owner@vger.kernel.org designates
	209.132.180.67 as permitted sender) client-ip=209.132.180.67; 
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
Message-Id: <20171226102940.26908-21-ard.biesheuvel@linaro.org>
In-Reply-To: <20171226102940.26908-1-ard.biesheuvel@linaro.org>
References: <20171226102940.26908-1-ard.biesheuvel@linaro.org>
Sender: linux-rt-users-owner@vger.kernel.org
Precedence: bulk

Series

crypto: arm64 - play nice with CONFIG_PREEMPT | expand

Commit Message

Ard Biesheuvel Dec. 26, 2017, 10:29 a.m. UTC

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(+)

-- 
2.11.0

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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

[v4,20/20] DO NOT MERGE

Commit Message

Patch