[RFC,12/13] ARC: build: inhibit ZOL generation by compiler

Message ID	20220222141506.4003433-13-geomatsi@gmail.com
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Headers	show Return-Path: <linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org> From: Sergey Matyukevich <geomatsi@gmail.com> To: linux-snps-arc@lists.infradead.org Cc: Vineet Gupta <vgupta@kernel.org>, Vladimir Isaev <isaev@synopsys.com>, Sergey Matyukevich <geomatsi@gmail.com>, Sergey Matyukevich <sergey.matyukevich@synopsys.com> Subject: [RFC PATCH 12/13] ARC: build: inhibit ZOL generation by compiler Date: Tue, 22 Feb 2022 17:15:05 +0300 Message-Id: <20220222141506.4003433-13-geomatsi@gmail.com> In-Reply-To: <20220222141506.4003433-1-geomatsi@gmail.com> References: <20220222141506.4003433-1-geomatsi@gmail.com> MIME-Version: 1.0 preview: From: Vineet Gupta Inhibit ZOL generation by compiler if configuration states the lack of it. This is done before we remove the ZOL regs save/restore in entry code Signed-off-by: Vineet Gupta --- arch/arc/Makefile \| 2 ++ 1 file changed, 2 insertions(+) Content analysis details: (-0.2 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2a00:1450:4864:20:0:0:0:22d listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider [geomatsi[at]gmail.com] -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain Precedence: list Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-snps-arc" <linux-snps-arc-bounces@lists.infradead.org> Errors-To: linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org
Series	ARC: handle the lack of ZOL support \| expand [RFC,00/13] ARC: handle the lack of ZOL support [RFC,01/13] ARC: uaccess: elide unaligned handling if hardware supports [RFC,02/13] ARC: Kconfig: introduce option to disable ZOL [RFC,03/13] ARC: uaccess: drop CC_OPTIMIZE_FOR_SIZE [RFC,04/13] ARC: uaccess: elide ZOL, use double load/stores [RFC,05/13] ARCv2: memset: don't prefetch for len == 0 which happens a lot [RFC,06/13] ARCv2: memset: elide unaligned handling if hardware supports [RFC,07/13] ARCv2: memset: rewrite using double load/stores [RFC,08/13] ARC: string: use generic C code if no ZOL support [RFC,09/13] ARC: delay: elide ZOL [RFC,10/13] ARC: checksum: elide ZOL [RFC,11/13] ARC: head: elide ZOL [RFC,12/13] ARC: build: inhibit ZOL generation by compiler [RFC,13/13] ARC: pt_regs: handle the case when ZOL is not supported

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20220222141506.4003433-13-geomatsi@gmail.com

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From: Sergey Matyukevich <geomatsi@gmail.com>
To: linux-snps-arc@lists.infradead.org
Cc: Vineet Gupta <vgupta@kernel.org>, Vladimir Isaev <isaev@synopsys.com>,
 Sergey Matyukevich <geomatsi@gmail.com>,
 Sergey Matyukevich <sergey.matyukevich@synopsys.com>
Subject: [RFC PATCH 12/13] ARC: build: inhibit ZOL generation by compiler
Date: Tue, 22 Feb 2022 17:15:05 +0300
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Series

ARC: handle the lack of ZOL support | expand

Commit Message

Sergey Matyukevich Feb. 22, 2022, 2:15 p.m. UTC

From: Vineet Gupta <vgupta@kernel.org>

Inhibit ZOL generation by compiler if configuration states
the lack of it. This is done before we remove the ZOL regs
save/restore in entry code

Signed-off-by: Vineet Gupta <vgupta@kernel.org>
---
 arch/arc/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arc/Makefile b/arch/arc/Makefile
index ec0f672bcee6..98a03c8d719c 100644
--- a/arch/arc/Makefile
+++ b/arch/arc/Makefile
@@ -44,6 +44,8 @@  cflags-y				+= -Wa,-I$(srctree)/arch/arc/include
 cflags-$(CONFIG_ARC_HAS_LLSC)		+= -mlock
 cflags-$(CONFIG_ARC_HAS_SWAPE)		+= -mswape
 
+cflags-$(CONFIG_ARC_LACKS_ZOL)		+= -fno-branch-count-reg
+
 ifdef CONFIG_ISA_ARCV2
 
 ifdef CONFIG_ARC_USE_UNALIGNED_MEM_ACCESS

[RFC,12/13] ARC: build: inhibit ZOL generation by compiler

Commit Message

Patch