[v5,23/23] DO NOT MERGE

Message ID	20180310152208.10369-24-ard.biesheuvel@linaro.org
State	New
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-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 v5 23/23] DO NOT MERGE Date: Sat, 10 Mar 2018 15:22:08 +0000 Message-Id: <20180310152208.10369-24-ard.biesheuvel@linaro.org> In-Reply-To: <20180310152208.10369-1-ard.biesheuvel@linaro.org> References: <20180310152208.10369-1-ard.biesheuvel@linaro.org> Sender: linux-rt-users-owner@vger.kernel.org Precedence: bulk
Series	crypto: arm64 - play nice with CONFIG_PREEMPT \| expand [v5,00/23] crypto: arm64 - play nice with CONFIG_PREEMPT [v5,03/23] crypto: arm64/aes-blk - move kernel mode neon en/disable into loop [v5,09/23] crypto: arm64/sha256-neon - play nice with CONFIG_PREEMPT kernels [v5,12/23] crypto: arm64/sha1-ce - yield NEON after every block of input [v5,13/23] crypto: arm64/sha2-ce - yield NEON after every block of input [v5,14/23] crypto: arm64/aes-ccm - yield NEON after every block of input [v5,23/23] DO NOT MERGE

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20180310152208.10369-24-ard.biesheuvel@linaro.org

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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-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 v5 23/23] DO NOT MERGE
Date: Sat, 10 Mar 2018 15:22:08 +0000
Message-Id: <20180310152208.10369-24-ard.biesheuvel@linaro.org>
In-Reply-To: <20180310152208.10369-1-ard.biesheuvel@linaro.org>
References: <20180310152208.10369-1-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 March 10, 2018, 3:22 p.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(+)

-- 
2.15.1

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diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h
index 61168cbe9781..b471b0bbdfe6 100644
--- a/arch/arm64/include/asm/assembler.h
+++ b/arch/arm64/include/asm/assembler.h
@@ -678,6 +678,7 @@  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
@@ -687,6 +688,38 @@  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

[v5,23/23] DO NOT MERGE

Commit Message

Patch