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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=uiS4vK1ED9a+VphuuXYAfxefFTXitmOIurQShIFya8E=; b=knENCBZJLjnme5dYLavNE4SzZlcEXECYLKWjtuLNOYhUoa3eJUGezeoyhxhfjxMidJ jRWl3I9pFc0cccm+5HwKs0gNukkmHpXTHZKukh4I/IQDoDtuzFwKciqP8s3kVSyNP+D/ v9L8MNe7URc1aeQZztR3Fby6FMmU7xpKhuL2Xa3RUKiu3P+tmxuLXwbAffOIUr7N7feX n1iE1E3iPUxmxx/k3jc8mk9bWcR6Klx/Plp24XSawkdPRC3w33lthjh/xeVmRICICh6h cwlVUgbjgB9SVNrspoC6nzs/LoWqknLXWHhn/XCTBNPjJ+zrRsOP2JemNacMIPazzN3m /PEQ== X-Gm-Message-State: AOAM531vWN1GqSOls/N4C1zkouC6WyUeXDs2wcP5hf2Yv40jJw9efEHm mLaeFiIp7lmJyqQGUQd11xaoDfrEtGrqvQUUHqs= X-Google-Smtp-Source: ABdhPJyQlgl//n+4oh/u/DXcrOj6zGvBkKmeLit3yZipK/1vtNk4x1r35x11Qpx6dqyegtQzgfRH5nJ0UHRADBro3FQ= X-Received: by 2002:a05:6214:8a:: with SMTP id n10mr5030949qvr.13.1596651564177; Wed, 05 Aug 2020 11:19:24 -0700 (PDT) Date: Wed, 5 Aug 2020 11:19:20 -0700 Message-Id: <20200805181920.4013059-1-samitolvanen@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.28.0.163.g6104cc2f0b6-goog Subject: [PATCH] arm64: tlb: fix ARM64_TLB_RANGE with LLVM's integrated assembler From: Sami Tolvanen To: Catalin Marinas , Will Deacon , Zhenyu Ye X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200805_141927_915407_4D143B10 X-CRM114-Status: GOOD ( 13.93 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , Kees Cook , Marc Zyngier , Nick Desaulniers , linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com, Sami Tolvanen , Nathan Chancellor , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Commit 7c78f67e9bd9 ("arm64: enable tlbi range instructions") breaks LLVM's integrated assembler, because -Wa,-march is only passed to external assemblers and therefore, the new instructions are not enabled when IAS is used. As binutils doesn't support .arch_extension tlb-rmi, this change adds .arch armv8.4-a to __TLBI_0 and __TLBI_1 to fix the issue with both LLVM IAS and binutils. Fixes: 7c78f67e9bd9 ("arm64: enable tlbi range instructions") Link: https://github.com/ClangBuiltLinux/linux/issues/1106 Signed-off-by: Sami Tolvanen --- arch/arm64/include/asm/tlbflush.h | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/arch/arm64/include/asm/tlbflush.h b/arch/arm64/include/asm/tlbflush.h index d493174415db..66c2aab5e9cb 100644 --- a/arch/arm64/include/asm/tlbflush.h +++ b/arch/arm64/include/asm/tlbflush.h @@ -16,6 +16,16 @@ #include #include +/* + * Enable ARMv8.4-TLBI instructions with ARM64_TLB_RANGE. Note that binutils + * doesn't support .arch_extension tlb-rmi, so use .arch armv8.4-a instead. + */ +#ifdef CONFIG_ARM64_TLB_RANGE +#define __TLBI_PREAMBLE ".arch armv8.4-a\n" +#else +#define __TLBI_PREAMBLE +#endif + /* * Raw TLBI operations. * @@ -28,14 +38,16 @@ * not. The macros handles invoking the asm with or without the * register argument as appropriate. */ -#define __TLBI_0(op, arg) asm ("tlbi " #op "\n" \ +#define __TLBI_0(op, arg) asm (__TLBI_PREAMBLE \ + "tlbi " #op "\n" \ ALTERNATIVE("nop\n nop", \ "dsb ish\n tlbi " #op, \ ARM64_WORKAROUND_REPEAT_TLBI, \ CONFIG_ARM64_WORKAROUND_REPEAT_TLBI) \ : : ) -#define __TLBI_1(op, arg) asm ("tlbi " #op ", %0\n" \ +#define __TLBI_1(op, arg) asm (__TLBI_PREAMBLE \ + "tlbi " #op ", %0\n" \ ALTERNATIVE("nop\n nop", \ "dsb ish\n tlbi " #op ", %0", \ ARM64_WORKAROUND_REPEAT_TLBI, \ base-commit: 4834ce9d8e074bb7ae197632e0708219b9f389b5 -- 2.28.0.163.g6104cc2f0b6-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel