From nobody Tue Apr 7 02:56:26 2026 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5EC1B308F0A for ; Mon, 16 Mar 2026 15:46:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773675995; cv=none; b=t6y5VLKdCSoOmKtHkdpBEE+lfDGGjmD8t5kZQN+kvlZNM34TAiU53nKLJo+7/iukKb5NDE5tctD/WXfnVYBGyvQdyvx8SR6owSHwQuiGRhqE/AqZJF4nNJl2yiakLkWpdhRCrrBsAxy5jX5y1Zwl0IIqA/kj1EZrZSWCkXaCjzA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773675995; c=relaxed/simple; bh=JQCgf544xbi44CoC+gqLmySNluxUodaT1DMo8nxG7cw=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=eAU24dvf2d2d6DkI1FjDCrYqDUWPzrojvR2tBaGU2AU0ZXgvicHPCvucb3yRQGuckFP0eMQG5BDEr3kRlPCxzuJvC7CRSI/Vrj3iVoVDZZBwDaFCvveVhi4cSnDLvLEprCMwfDTqgzPzUC0JPkV0kn5OLpXKJDdKr6ryzuCprV4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=yOcowo7p; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=hsF+BcnN; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="yOcowo7p"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="hsF+BcnN" From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1773675992; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=mHtN+rnq/9BVWxyD3Wfvb5q97rTBXdu7QNBZAnIzMZw=; b=yOcowo7pTTNZchuAuyZlneIVzObQTsimqkGq0SkrDV0YIBx4I6sn6He5vz0CabG/To4rtk UWW7mi4HuXquEFJCrNdvlUnTqqENvnK5LHHj8+Sbtwx08L5OQr/7Wan0WWYrXW0Kh6I8Hu CO4b8PzA6WKQpeboIYlj5z1XoCCMswxucwXc585Jp9idhpQE5wLv+jhSFnbii48jof1GtQ IYSk3lut7Jh2Vz6EG3/eci9ib2CCRtnyO+MbY/hUtxO+8kBqGenH/LvYNcCJ2NLKyb3nz1 Lgyt0FebmzLB4x/RpxQbVh4ZCWiXQ4TUpxZtWS+C1iAbp4ADJSxTMpVzgK9/dw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1773675992; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=mHtN+rnq/9BVWxyD3Wfvb5q97rTBXdu7QNBZAnIzMZw=; b=hsF+BcnN84Q8o781Oug7QjRNp80GrDLkEkk1zRMdOlBwyJYJGysP0ym10T7CtvmRuSgcl3 hnQqKS/Nzy7+gSBA== Date: Mon, 16 Mar 2026 16:46:14 +0100 Subject: [PATCH RESEND v4] riscv: Implement ARCH_HAS_CC_CAN_LINK Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260316-cc-can-link-riscv-v4-1-64c072b456dd@linutronix.de> To: Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, llvm@lists.linux.dev, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Developer-Signature: v=1; a=ed25519-sha256; t=1773675990; l=2321; i=thomas.weissschuh@linutronix.de; s=20240209; h=from:subject:message-id; bh=JQCgf544xbi44CoC+gqLmySNluxUodaT1DMo8nxG7cw=; b=NPN4xNgMxvcwwlhstaLrGvgJ/nCDynrT/VD6/2UlNJZ7ToavccAElKeJ8YzacwbE0X4JfTAx2 sL/dluLtLKBCIFwKU35mje1FNL2aJM0A/ucHzyoyetqZ2jDc/MDJXpu X-Developer-Key: i=thomas.weissschuh@linutronix.de; a=ed25519; pk=pfvxvpFUDJV2h2nY0FidLUml22uGLSjByFbM6aqQQws= The generic CC_CAN_LINK detection relies on -m32/-m64 compiler flags. These are not supported by riscv compilers. Use architecture-specific logic using -mabi instead. Prefer the 'd' ABI variant when possible as todays toolchains are most likely to provide a libc for that one. Signed-off-by: Thomas Wei=C3=9Fschuh --- Changes in v4: - Add -march=3D for clang compatibility. - (Sorry for the fast resend, the fixed variant was on a wrong branch) - Link to v3: https://lore.kernel.org/r/20260227-cc-can-link-riscv-v3-1-b0b= af0fff571@linutronix.de Changes in v3: - Rebase on v7.0-rc1 - Link to v2: https://lore.kernel.org/r/20260116-cc-can-link-riscv-v2-1-eaf= 362d74c90@linutronix.de Changes in v2: - Also handle !FPU case. - Extend commit message. - Link to v1: https://lore.kernel.org/r/20251222-cc-can-link-riscv-v1-1-633= e39e4a60d@linutronix.de --- arch/riscv/Kconfig | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 90c531e6abf5..614106694224 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -25,6 +25,7 @@ config RISCV select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2 select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE select ARCH_HAS_BINFMT_FLAT + select ARCH_HAS_CC_CAN_LINK select ARCH_HAS_CURRENT_STACK_POINTER select ARCH_HAS_DEBUG_VIRTUAL if MMU select ARCH_HAS_DEBUG_VM_PGTABLE @@ -1374,6 +1375,20 @@ config PORTABLE config ARCH_PROC_KCORE_TEXT def_bool y =20 +config ARCH_CC_CAN_LINK + bool + default $(cc_can_link_user,-march=3Drv64g -mabi=3Dlp64d) if 64BIT && FPU + default $(cc_can_link_user,-march=3Drv64g -mabi=3Dlp64) if 64BIT + default $(cc_can_link_user,-march=3Drv32g -mabi=3Dilp32d) if FPU + default $(cc_can_link_user,-march=3Drv32g -mabi=3Dilp32) + +config ARCH_USERFLAGS + string + default "-march=3Drv64g -mabi=3Dlp64d" if 64BIT && FPU + default "-march=3Drv64g -mabi=3Dlp64" if 64BIT + default "-march=3Drv32g -mabi=3Dilp32d" if FPU + default "-march=3Drv32g -mabi=3Dilp32" + menu "Power management options" =20 source "kernel/power/Kconfig" --- base-commit: 6de23f81a5e08be8fbf5e8d7e9febc72a5b5f27f change-id: 20251222-cc-can-link-riscv-dc0304d27cf4 Best regards, --=20 Thomas Wei=C3=9Fschuh