From nobody Sun Feb 8 22:13:35 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 D3ED2209696; Wed, 12 Feb 2025 12:49:19 +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=1739364561; cv=none; b=j1m+K5vV+Ch+HZaMiHNLDse+3UMEOmHN9cXNh7+ZSlxwhZsQfT/ihTO5ugyLUAo0VGLNrA9brtOFCZHDTHTKCFNSB747I7UzbSo+RSR+i+kVy57MfsHnpP9l4D7BqtvVZIc/H4TAnV7UCza2FoZ8tXZOo7VtX/QUVAywyXBr0PQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739364561; c=relaxed/simple; bh=Z3DuBWiolyR+/hYM6KNiu+IxGCZbOsuSr/Aoh4+JX5A=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=O/EFh0jS45EEs86ZX5x1P7s4qoZLy53Vs8ODSsDWYctuWb5Otww1gpjD8GE3PmLE4eVDKICrRGrySco1LIB2oOlsmxkNWlyMVnBfzEz5Z2UChGuq1hhXbKdN88IRq88rRy0O/wFYDBbO6/DjXnhgaOktQE4jbw3p2JrEpfnz3NY= 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=a9gReCmn; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=KzVnUi34; 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="a9gReCmn"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="KzVnUi34" From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1739364558; 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: in-reply-to:in-reply-to:references:references; bh=rRO/aCcLz5c3u/REzsM4oOV5h4ZskKLpS8CU6v4XYto=; b=a9gReCmnC7XI7cxq9UB1Fw/AGRgKOd1XXL0iAYc+qorhU5jzfBJSSUjYAarb1x9RCOWz8x HGzrzeePWrOm8T/cxTfgtORX4YJdsF9/Ps1ryhXL8RCVCq0h6+hS2GTyekgdRuNdu1q5nS DKBiwoAACo6WV2Mmr/hNV9xk1/s6LZ1VkIFdcZadFZm6MnUTc6oi73qhPSwKRlfr2/cc6N Wi9QPEv6IYv6B52E3nPZkeOfUlgSzJgbTHs70i0F7Zo9GF14mfLwxGQSVIkpuiUBtUfISf Ki3/RD1+v3YvJrnK4iV6VUmpoJyWTwcKvW8dFlczZD1HsP5MRPlIo+G80AGQFA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1739364558; 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: in-reply-to:in-reply-to:references:references; bh=rRO/aCcLz5c3u/REzsM4oOV5h4ZskKLpS8CU6v4XYto=; b=KzVnUi34OjDF9ollf//8mUXu1v9G83HTe0nbKZ4dXQTuxcC9M+JLjkbl9EA+1r+hOiuI6O +6ui9WzPSsR3gjCg== Date: Wed, 12 Feb 2025 13:49:12 +0100 Subject: [PATCH 1/2] MIPS: mm: Avoid blocking DMA zone with memory map memblock allocation 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: <20250212-kunit-mips-v1-1-eb49c9d76615@linutronix.de> References: <20250212-kunit-mips-v1-0-eb49c9d76615@linutronix.de> In-Reply-To: <20250212-kunit-mips-v1-0-eb49c9d76615@linutronix.de> To: Thomas Bogendoerfer , Paul Burton , Brendan Higgins , David Gow , Rae Moar Cc: linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= , Mike Rapoport , Andrew Morton , linux-mm@kvack.org X-Developer-Signature: v=1; a=ed25519-sha256; t=1739364553; l=1909; i=thomas.weissschuh@linutronix.de; s=20240209; h=from:subject:message-id; bh=Z3DuBWiolyR+/hYM6KNiu+IxGCZbOsuSr/Aoh4+JX5A=; b=OXcSbIpxkSAcwRHlbs6HEkqNZAr1X0CIlnfLaAoT1SSEcEMDWPzWfdYZd9W5RQPoUd7KDBMI5 FrUSOFE+ZgQDd8N90ifgnRot3jhDXJfoQTpI9U4z66GBsSI9+Wtcn33 X-Developer-Key: i=thomas.weissschuh@linutronix.de; a=ed25519; pk=pfvxvpFUDJV2h2nY0FidLUml22uGLSjByFbM6aqQQws= On MIPS the memblock allocator is configured to allocate bottom-up. The memory map is allocated by the mm core through memblock and uses MEMBLOCK_LOW_LIMIT as minimal address. This constant is defined as zero bec= ause it assumes that "we are using top down, so it is safe to use 0 here". So the memory map is allocated as close to 0 as possible, right where the D= MA zone will end up. As the memory map is allocated permanently and also larger than the DMA zone, it makes the DMA zone unusable. Temporarily switch to top-down allocation for the call to free_area_init() = so the memory map allocation does not fall into the DMA zone. Signed-off-by: Thomas Wei=C3=9Fschuh --- Another solution would be to change alloc_node_mem_map() in the mm core to use __pa(MAX_DMA_ADDRESS) for the min_addr when calling memmap_alloc(), as is done by the other callers of memmap_alloc(). Looping in the memblock maintainers for discussion. This is reliably reproducible in QEMU. To reproduce, use the kunit configuration from patch 2 of this series and run it like so: ./tools/testing/kunit/kunit.py run --arch mips64el --cross_compile $CROSS_C= OMPILE cs_dsp_wmfwV3_err_halo.wmfw_v2_coeff_description_exceeds_block To: Mike Rapoport To: Andrew Morton Cc: linux-mm@kvack.org --- arch/mips/mm/init.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c index 4583d1a2a73e7ff36a42f6017d9aef008e45df6e..712eb4762917261416f1fca2d99= 25a42107ef6c1 100644 --- a/arch/mips/mm/init.c +++ b/arch/mips/mm/init.c @@ -435,7 +435,9 @@ void __init paging_init(void) #endif high_memory =3D (void *) __va(max_low_pfn << PAGE_SHIFT); =20 + memblock_set_bottom_up(false); free_area_init(max_zone_pfns); + memblock_set_bottom_up(true); } =20 #ifdef CONFIG_64BIT --=20 2.48.1 From nobody Sun Feb 8 22:13:35 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 A7E7A20A5CB; 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a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1739364558; 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: in-reply-to:in-reply-to:references:references; bh=VfBrN75f8h+uEuGhED42HwCyXiiO8jFgRTxqPcj2O+Q=; b=PTK+ISsi6zORO6UZMD23AevzyGYLcw2wB0UCxsEGFJ7csQJhsAPbhQbjCjbYpnjgxMU++Z O5Yk3xUuL8pg1WCQ== Date: Wed, 12 Feb 2025 13:49:13 +0100 Subject: [PATCH 2/2] kunit: qemu_configs: Add MIPS configurations 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: <20250212-kunit-mips-v1-2-eb49c9d76615@linutronix.de> References: <20250212-kunit-mips-v1-0-eb49c9d76615@linutronix.de> In-Reply-To: <20250212-kunit-mips-v1-0-eb49c9d76615@linutronix.de> To: Thomas Bogendoerfer , Paul Burton , Brendan Higgins , David Gow , Rae Moar Cc: linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, kunit-dev@googlegroups.com, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Developer-Signature: v=1; a=ed25519-sha256; t=1739364553; l=4132; i=thomas.weissschuh@linutronix.de; s=20240209; h=from:subject:message-id; bh=Ki0geKqiotb7MNz6x+v8X77O0WmfIbS8RbGuA4eQZjo=; b=Ar6njH5ZwFpZSFlfL1oDpY8zPN35HzEyLXIMywlPj1uWAZiUPpdn6ZZLsvvohpPE78uwrRv5R Fno8E8H5e5uAAlSMTnyfTO/B4NXkcQ+rnzg8iezaz7YPkfn1SMMgjaL X-Developer-Key: i=thomas.weissschuh@linutronix.de; a=ed25519; pk=pfvxvpFUDJV2h2nY0FidLUml22uGLSjByFbM6aqQQws= Add basic support to run various MIPS variants via kunit_tool using the virtualized malta platform. Signed-off-by: Thomas Wei=C3=9Fschuh --- tools/testing/kunit/qemu_configs/mips.py | 18 ++++++++++++++++++ tools/testing/kunit/qemu_configs/mips64.py | 19 +++++++++++++++++++ tools/testing/kunit/qemu_configs/mips64el.py | 19 +++++++++++++++++++ tools/testing/kunit/qemu_configs/mipsel.py | 18 ++++++++++++++++++ 4 files changed, 74 insertions(+) diff --git a/tools/testing/kunit/qemu_configs/mips.py b/tools/testing/kunit= /qemu_configs/mips.py new file mode 100644 index 0000000000000000000000000000000000000000..8899ac157b30bd2ee847eacd5b9= 0fe6ad4e5fb04 --- /dev/null +++ b/tools/testing/kunit/qemu_configs/mips.py @@ -0,0 +1,18 @@ +# SPDX-License-Identifier: GPL-2.0 + +from ..qemu_config import QemuArchParams + +QEMU_ARCH =3D QemuArchParams(linux_arch=3D'mips', + kconfig=3D''' +CONFIG_32BIT=3Dy +CONFIG_CPU_BIG_ENDIAN=3Dy +CONFIG_MIPS_MALTA=3Dy +CONFIG_SERIAL_8250=3Dy +CONFIG_SERIAL_8250_CONSOLE=3Dy +CONFIG_POWER_RESET=3Dy +CONFIG_POWER_RESET_SYSCON=3Dy +''', + qemu_arch=3D'mips', + kernel_path=3D'vmlinuz', + kernel_command_line=3D'console=3DttyS0', + extra_qemu_params=3D['-M', 'malta']) diff --git a/tools/testing/kunit/qemu_configs/mips64.py b/tools/testing/kun= it/qemu_configs/mips64.py new file mode 100644 index 0000000000000000000000000000000000000000..1478aed05b94da4914f34c6a8af= fdcfe34eb88ea --- /dev/null +++ b/tools/testing/kunit/qemu_configs/mips64.py @@ -0,0 +1,19 @@ +# SPDX-License-Identifier: GPL-2.0 + +from ..qemu_config import QemuArchParams + +QEMU_ARCH =3D QemuArchParams(linux_arch=3D'mips', + kconfig=3D''' +CONFIG_CPU_MIPS64_R2=3Dy +CONFIG_64BIT=3Dy +CONFIG_CPU_BIG_ENDIAN=3Dy +CONFIG_MIPS_MALTA=3Dy +CONFIG_SERIAL_8250=3Dy +CONFIG_SERIAL_8250_CONSOLE=3Dy +CONFIG_POWER_RESET=3Dy +CONFIG_POWER_RESET_SYSCON=3Dy +''', + qemu_arch=3D'mips64', + kernel_path=3D'vmlinuz', + kernel_command_line=3D'console=3DttyS0', + extra_qemu_params=3D['-M', 'malta', '-cpu', '5K= Ec']) diff --git a/tools/testing/kunit/qemu_configs/mips64el.py b/tools/testing/k= unit/qemu_configs/mips64el.py new file mode 100644 index 0000000000000000000000000000000000000000..300c711d7a82500b2ebcb4cf146= 7b6f72b5c17aa --- /dev/null +++ b/tools/testing/kunit/qemu_configs/mips64el.py @@ -0,0 +1,19 @@ +# SPDX-License-Identifier: GPL-2.0 + +from ..qemu_config import QemuArchParams + +QEMU_ARCH =3D QemuArchParams(linux_arch=3D'mips', + kconfig=3D''' +CONFIG_CPU_MIPS64_R2=3Dy +CONFIG_64BIT=3Dy +CONFIG_CPU_LITTLE_ENDIAN=3Dy +CONFIG_MIPS_MALTA=3Dy +CONFIG_SERIAL_8250=3Dy +CONFIG_SERIAL_8250_CONSOLE=3Dy +CONFIG_POWER_RESET=3Dy +CONFIG_POWER_RESET_SYSCON=3Dy +''', + qemu_arch=3D'mips64el', + kernel_path=3D'vmlinuz', + kernel_command_line=3D'console=3DttyS0', + extra_qemu_params=3D['-M', 'malta', '-cpu', '5K= Ec']) diff --git a/tools/testing/kunit/qemu_configs/mipsel.py b/tools/testing/kun= it/qemu_configs/mipsel.py new file mode 100644 index 0000000000000000000000000000000000000000..3d3543315b45776d0e77fb5c00c= 8c0a89eafdffd --- /dev/null +++ b/tools/testing/kunit/qemu_configs/mipsel.py @@ -0,0 +1,18 @@ +# SPDX-License-Identifier: GPL-2.0 + +from ..qemu_config import QemuArchParams + +QEMU_ARCH =3D QemuArchParams(linux_arch=3D'mips', + kconfig=3D''' +CONFIG_32BIT=3Dy +CONFIG_CPU_LITTLE_ENDIAN=3Dy +CONFIG_MIPS_MALTA=3Dy +CONFIG_SERIAL_8250=3Dy +CONFIG_SERIAL_8250_CONSOLE=3Dy +CONFIG_POWER_RESET=3Dy +CONFIG_POWER_RESET_SYSCON=3Dy +''', + qemu_arch=3D'mipsel', + kernel_path=3D'vmlinuz', + kernel_command_line=3D'console=3DttyS0', + extra_qemu_params=3D['-M', 'malta']) --=20 2.48.1