From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from foss.arm.com ([217.140.101.70]:38240 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752411AbeENJrf (ORCPT ); Mon, 14 May 2018 05:47:35 -0400 From: Mark Rutland To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, catalin.marinas@arm.com, dave.martin@arm.com, james.morse@arm.com, linux@dominikbrodowski.net, linux-fsdevel@vger.kernel.org, marc.zyngier@arm.com, mark.rutland@arm.com, viro@zeniv.linux.org.uk, will.deacon@arm.com Subject: [PATCH 05/18] arm64: kill change_cpacr() Date: Mon, 14 May 2018 10:46:27 +0100 Message-Id: <20180514094640.27569-6-mark.rutland@arm.com> In-Reply-To: <20180514094640.27569-1-mark.rutland@arm.com> References: <20180514094640.27569-1-mark.rutland@arm.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: Now that we have sysreg_clear_set(), we can use this instead of change_cpacr(). Note that the order of the set and clear arguments differs between change_cpacr() and sysreg_clear_set(), so these are flipped as part of the conversion. Also, sve_user_enable() redundantly clears CPACR_EL1_ZEN_EL0EN before setting it; this is removed for clarity. Signed-off-by: Mark Rutland Cc: Catalin Marinas Cc: Dave Martin Cc: James Morse Cc: Will Deacon --- arch/arm64/kernel/fpsimd.c | 13 ++----------- 1 file changed, 2 insertions(+), 11 deletions(-) diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c index 87a35364e750..088940387a4d 100644 --- a/arch/arm64/kernel/fpsimd.c +++ b/arch/arm64/kernel/fpsimd.c @@ -172,23 +172,14 @@ static void *sve_pffr(struct task_struct *task) sve_ffr_offset(task->thread.sve_vl); } -static void change_cpacr(u64 val, u64 mask) -{ - u64 cpacr = read_sysreg(CPACR_EL1); - u64 new = (cpacr & ~mask) | val; - - if (new != cpacr) - write_sysreg(new, CPACR_EL1); -} - static void sve_user_disable(void) { - change_cpacr(0, CPACR_EL1_ZEN_EL0EN); + sysreg_clear_set(cpacr_el1, CPACR_EL1_ZEN_EL0EN, 0); } static void sve_user_enable(void) { - change_cpacr(CPACR_EL1_ZEN_EL0EN, CPACR_EL1_ZEN_EL0EN); + sysreg_clear_set(cpacr_el1, 0, CPACR_EL1_ZEN_EL0EN); } /* -- 2.11.0