From nobody Fri Dec 19 07:24:15 2025 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 438043469E6 for ; Tue, 16 Dec 2025 14:46:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765896377; cv=none; b=n/D4rlKZz+CdcZX/lVBNQbdgWIa7mtrVHpB/bOagjz/itCe++R+aTV01cOt5aiHYbfhTZWPMfn2Xs9WUdEcvOIuxhZZ24zvRKZCZBYMI92qs9jxa7FI3uApRr+JoEJ3EucNL7fTo/y/h0GQbxHtdDqcbyLdplmpnGTztnKVGpBM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765896377; c=relaxed/simple; bh=O2qZ6OZ7h4Nw9edqoxMG9imTzBoaPD6JrT3OeLH5ze0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Ko3wYXqCZE6GaTW3BV09JE33Ox+Nn12JHAq5rz6zm+ggu97hVU6vKyDgCD2vbOPBUlJySGBB9zNcfpq4URbv27tz/xQ3gf4av9xzoYLalmQ8KnxL+PImRALvzzDHNrVwNiq5D+Z0sVjDcPrnYAOQvwl/dJcYFDnsuCebAhA3TRA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 4B2BC1655; Tue, 16 Dec 2025 06:46:07 -0800 (PST) Received: from e125769.cambridge.arm.com (e125769.cambridge.arm.com [10.1.196.27]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id EEC223F73F; Tue, 16 Dec 2025 06:46:12 -0800 (PST) From: Ryan Roberts To: Will Deacon , Ard Biesheuvel , Catalin Marinas , Mark Rutland , Linus Torvalds , Oliver Upton , Marc Zyngier , Dev Jain , Linu Cherian Cc: Ryan Roberts , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v1 02/13] arm64: mm: Introduce a C wrapper for by-range TLB invalidation Date: Tue, 16 Dec 2025 14:45:47 +0000 Message-ID: <20251216144601.2106412-3-ryan.roberts@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20251216144601.2106412-1-ryan.roberts@arm.com> References: <20251216144601.2106412-1-ryan.roberts@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" As part of efforts to reduce our reliance on complex preprocessor macros for TLB invalidation routines, introduce a new C wrapper for by-range TLB invalidation which can be used instead of the __tlbi() macro and can additionally be called from C code. Each specific tlbi range op is implemented as a C function and the appropriate function pointer is passed to __tlbi_range(). Since everything is declared inline and is statically resolvable, the compiler will convert the indirect function call to a direct inline execution. Suggested-by: Linus Torvalds Signed-off-by: Ryan Roberts --- arch/arm64/include/asm/tlbflush.h | 33 ++++++++++++++++++++++++++++++- 1 file changed, 32 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/tlbflush.h b/arch/arm64/include/asm/tlb= flush.h index 13a59cf28943..c5111d2afc66 100644 --- a/arch/arm64/include/asm/tlbflush.h +++ b/arch/arm64/include/asm/tlbflush.h @@ -459,6 +459,37 @@ static inline void arch_tlbbatch_flush(struct arch_tlb= flush_unmap_batch *batch) * operations can only span an even number of pages. We save this for l= ast to * ensure 64KB start alignment is maintained for the LPA2 case. */ +static __always_inline void rvae1is(u64 arg) +{ + __tlbi(rvae1is, arg); +} + +static __always_inline void rvale1(u64 arg) +{ + __tlbi(rvale1, arg); + __tlbi_user(rvale1, arg); +} + +static __always_inline void rvale1is(u64 arg) +{ + __tlbi(rvale1is, arg); +} + +static __always_inline void rvaale1is(u64 arg) +{ + __tlbi(rvaale1is, arg); +} + +static __always_inline void ripas2e1is(u64 arg) +{ + __tlbi(ripas2e1is, arg); +} + +static __always_inline void __tlbi_range(tlbi_op op, u64 arg) +{ + op(arg); +} + #define __flush_tlb_range_op(op, start, pages, stride, \ asid, tlb_level, tlbi_user, lpa2) \ do { \ @@ -486,7 +517,7 @@ do { \ if (num >=3D 0) { \ addr =3D __TLBI_VADDR_RANGE(__flush_start >> shift, asid, \ scale, num, tlb_level); \ - __tlbi(r##op, addr); \ + __tlbi_range(r##op, addr); \ if (tlbi_user) \ __tlbi_user(r##op, addr); \ __flush_start +=3D __TLBI_RANGE_PAGES(num, scale) << PAGE_SHIFT; \ --=20 2.43.0