From nobody Mon Feb 9 16:33:40 2026 Received: from bali.collaboradmins.com (bali.collaboradmins.com [148.251.105.195]) (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 B30693A5E67; Thu, 13 Nov 2025 17:00:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.251.105.195 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763053220; cv=none; b=tmZcVxLcnnRY1kRLwJmvu95KUzNSS6MdQ7++5VvqCGdjTXoznJ/7uyLU/1Hh44ojVdBSnB4mNusPKV30vKTggEUXjN74vkTQ7B2gy8L4jWfw5k5/Od+WcqXix9hCgJV/HCqKXtvR6q8wgqz6vkkCbAL0t0A7Oi5r/PvscDB23UU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763053220; c=relaxed/simple; bh=v6OFrxSoAyYpbjHM20r9xFnmPba+agNd9y5f3ZRnldE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Tz9yo+TMUZI9zU8o9hgoTuwfyqH18zfBvlcbol8hgbaIEGD+qdeq9M6FCZp462F1DobVylk/IgIMUbLDU2cDaug+a1vj6XNoOX8aXGdADXnN163AZq+i+d6/X/Jrq6HRwDhy2ZbZco7cXY6OgMMGS2qCmZ+yUNxsLx8VSTCLT8U= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b=Iv924Bly; arc=none smtp.client-ip=148.251.105.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b="Iv924Bly" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1763053217; bh=v6OFrxSoAyYpbjHM20r9xFnmPba+agNd9y5f3ZRnldE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Iv924BlysCuYVXp9dzNJuYONWp6IS5gK6U9qiyL1IOg11OZW3tnBevE037LSg/YRD eV1YPYkLXt/qsW2ckdkVz9IWt8LiHkCU6Ui1paOKjBm6E+thJIgrEclNxxDBNPPsny mFH+ziwp07u2WGklPcFuhGB0EmHYIMKHgn3NMVDzfj+6EtwVpVtYKKuj+3SZutaaUF Chk2MH6gOgyOEun8HTPaNm4cie8iJJ0XHpuBksAOjX197BTAzk10+dt21sva9whn6N +QQW3eObP6pV95dbYlX198rCpBxcJcrlhoVYDLUm8G8oKA8UUmbiHirKJfgjnm4Gr7 35HVIuyRPRljQ== Received: from debian-rockchip-rock5b-rk3588.. (unknown [IPv6:2a01:e0a:5e3:6100:826d:bc07:e98c:84a]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: loicmolinari) by bali.collaboradmins.com (Postfix) with ESMTPSA id 2398617E151F; Thu, 13 Nov 2025 18:00:16 +0100 (CET) From: =?UTF-8?q?Lo=C3=AFc=20Molinari?= To: Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , Boris Brezillon , Rob Herring , Steven Price , Liviu Dudau , Melissa Wen , =?UTF-8?q?Ma=C3=ADra=20Canal?= , Hugh Dickins , Baolin Wang , Andrew Morton , =?UTF-8?q?Lo=C3=AFc=20Molinari?= , Al Viro , =?UTF-8?q?Miko=C5=82aj=20Wasiak?= , Christian Brauner , Nitin Gote , Andi Shyti , Jonathan Corbet , Christopher Healy , Matthew Wilcox , Bagas Sanjaya Cc: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, linux-mm@kvack.org, linux-doc@vger.kernel.org, kernel@collabora.com Subject: [PATCH v8 06/11] drm/v3d: Use huge tmpfs mountpoint helpers Date: Thu, 13 Nov 2025 18:00:02 +0100 Message-ID: <20251113170008.79587-7-loic.molinari@collabora.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20251113170008.79587-1-loic.molinari@collabora.com> References: <20251113170008.79587-1-loic.molinari@collabora.com> 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 Make use of the new drm_gem_huge_mnt_create() and drm_gem_has_huge_mnt() helpers to avoid code duplication. Now that it's just a few lines long, the single function in v3d_gemfs.c is moved into v3d_gem.c. v3: - use huge tmpfs mountpoint in drm_device - move v3d_gemfs.c into v3d_gem.c v4: - clean up mountpoint creation error handling v5: - fix CONFIG_TRANSPARENT_HUGEPAGE check - use drm_gem_has_huge_mnt() helper v8: - don't access huge_mnt field with CONFIG_TRANSPARENT_HUGEPAGE=3Dn Signed-off-by: Lo=C3=AFc Molinari --- drivers/gpu/drm/v3d/Makefile | 3 +- drivers/gpu/drm/v3d/v3d_bo.c | 9 +++-- drivers/gpu/drm/v3d/v3d_drv.c | 2 +- drivers/gpu/drm/v3d/v3d_drv.h | 11 +----- drivers/gpu/drm/v3d/v3d_gem.c | 27 ++++++++++++-- drivers/gpu/drm/v3d/v3d_gemfs.c | 62 --------------------------------- 6 files changed, 34 insertions(+), 80 deletions(-) delete mode 100644 drivers/gpu/drm/v3d/v3d_gemfs.c diff --git a/drivers/gpu/drm/v3d/Makefile b/drivers/gpu/drm/v3d/Makefile index fcf710926057..b7d673f1153b 100644 --- a/drivers/gpu/drm/v3d/Makefile +++ b/drivers/gpu/drm/v3d/Makefile @@ -13,8 +13,7 @@ v3d-y :=3D \ v3d_trace_points.o \ v3d_sched.o \ v3d_sysfs.o \ - v3d_submit.o \ - v3d_gemfs.o + v3d_submit.o =20 v3d-$(CONFIG_DEBUG_FS) +=3D v3d_debugfs.o =20 diff --git a/drivers/gpu/drm/v3d/v3d_bo.c b/drivers/gpu/drm/v3d/v3d_bo.c index d9547f5117b9..3bc714ea6392 100644 --- a/drivers/gpu/drm/v3d/v3d_bo.c +++ b/drivers/gpu/drm/v3d/v3d_bo.c @@ -114,7 +114,7 @@ v3d_bo_create_finish(struct drm_gem_object *obj) if (IS_ERR(sgt)) return PTR_ERR(sgt); =20 - if (!v3d->gemfs) + if (!drm_gem_has_huge_mnt(obj->dev)) align =3D SZ_4K; else if (obj->size >=3D SZ_1M) align =3D SZ_1M; @@ -150,12 +150,15 @@ struct v3d_bo *v3d_bo_create(struct drm_device *dev, = struct drm_file *file_priv, size_t unaligned_size) { struct drm_gem_shmem_object *shmem_obj; - struct v3d_dev *v3d =3D to_v3d_dev(dev); struct v3d_bo *bo; int ret; =20 +#ifdef CONFIG_TRANSPARENT_HUGEPAGE shmem_obj =3D drm_gem_shmem_create_with_mnt(dev, unaligned_size, - v3d->gemfs); + dev->huge_mnt); +#else + shmem_obj =3D drm_gem_shmem_create(dev, unaligned_size); +#endif if (IS_ERR(shmem_obj)) return ERR_CAST(shmem_obj); bo =3D to_v3d_bo(&shmem_obj->base); diff --git a/drivers/gpu/drm/v3d/v3d_drv.c b/drivers/gpu/drm/v3d/v3d_drv.c index e8a46c8bad8a..30b55a00eeda 100644 --- a/drivers/gpu/drm/v3d/v3d_drv.c +++ b/drivers/gpu/drm/v3d/v3d_drv.c @@ -107,7 +107,7 @@ static int v3d_get_param_ioctl(struct drm_device *dev, = void *data, args->value =3D v3d->perfmon_info.max_counters; return 0; case DRM_V3D_PARAM_SUPPORTS_SUPER_PAGES: - args->value =3D !!v3d->gemfs; + args->value =3D drm_gem_has_huge_mnt(dev); return 0; case DRM_V3D_PARAM_GLOBAL_RESET_COUNTER: mutex_lock(&v3d->reset_lock); diff --git a/drivers/gpu/drm/v3d/v3d_drv.h b/drivers/gpu/drm/v3d/v3d_drv.h index 1884686985b8..99a39329bb85 100644 --- a/drivers/gpu/drm/v3d/v3d_drv.h +++ b/drivers/gpu/drm/v3d/v3d_drv.h @@ -158,11 +158,6 @@ struct v3d_dev { struct drm_mm mm; spinlock_t mm_lock; =20 - /* - * tmpfs instance used for shmem backed objects - */ - struct vfsmount *gemfs; - struct work_struct overflow_mem_work; =20 struct v3d_queue_state queue[V3D_MAX_QUEUES]; @@ -569,6 +564,7 @@ extern const struct dma_fence_ops v3d_fence_ops; struct dma_fence *v3d_fence_create(struct v3d_dev *v3d, enum v3d_queue q); =20 /* v3d_gem.c */ +extern bool super_pages; int v3d_gem_init(struct drm_device *dev); void v3d_gem_destroy(struct drm_device *dev); void v3d_reset_sms(struct v3d_dev *v3d); @@ -576,11 +572,6 @@ void v3d_reset(struct v3d_dev *v3d); void v3d_invalidate_caches(struct v3d_dev *v3d); void v3d_clean_caches(struct v3d_dev *v3d); =20 -/* v3d_gemfs.c */ -extern bool super_pages; -void v3d_gemfs_init(struct v3d_dev *v3d); -void v3d_gemfs_fini(struct v3d_dev *v3d); - /* v3d_submit.c */ void v3d_job_cleanup(struct v3d_job *job); void v3d_job_put(struct v3d_job *job); diff --git a/drivers/gpu/drm/v3d/v3d_gem.c b/drivers/gpu/drm/v3d/v3d_gem.c index 5a180dc6c452..f316f67364d2 100644 --- a/drivers/gpu/drm/v3d/v3d_gem.c +++ b/drivers/gpu/drm/v3d/v3d_gem.c @@ -259,6 +259,30 @@ v3d_invalidate_caches(struct v3d_dev *v3d) v3d_invalidate_slices(v3d, 0); } =20 +static void +v3d_huge_mnt_init(struct v3d_dev *v3d) +{ + int err =3D 0; + + /* + * By using a huge shmemfs mountpoint when the user wants to + * enable Super Pages, we can pass in mount flags that better + * match our usecase. + */ + + if (IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE) && super_pages) + err =3D drm_gem_huge_mnt_create(&v3d->drm, "within_size"); + + if (drm_gem_has_huge_mnt(&v3d->drm)) + drm_info(&v3d->drm, "Using Transparent Hugepages\n"); + else if (err) + drm_warn(&v3d->drm, "Can't use Transparent Hugepages (%d)\n", + err); + else + drm_notice(&v3d->drm, + "Transparent Hugepage support is recommended for optimal performance= on this platform!\n"); +} + int v3d_gem_init(struct drm_device *dev) { @@ -310,7 +334,7 @@ v3d_gem_init(struct drm_device *dev) v3d_init_hw_state(v3d); v3d_mmu_set_page_table(v3d); =20 - v3d_gemfs_init(v3d); + v3d_huge_mnt_init(v3d); =20 ret =3D v3d_sched_init(v3d); if (ret) { @@ -330,7 +354,6 @@ v3d_gem_destroy(struct drm_device *dev) enum v3d_queue q; =20 v3d_sched_fini(v3d); - v3d_gemfs_fini(v3d); =20 /* Waiting for jobs to finish would need to be done before * unregistering V3D. diff --git a/drivers/gpu/drm/v3d/v3d_gemfs.c b/drivers/gpu/drm/v3d/v3d_gemf= s.c deleted file mode 100644 index bf351fc0d488..000000000000 --- a/drivers/gpu/drm/v3d/v3d_gemfs.c +++ /dev/null @@ -1,62 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0+ -/* Copyright (C) 2024 Raspberry Pi */ - -#include -#include -#include - -#include - -#include "v3d_drv.h" - -void v3d_gemfs_init(struct v3d_dev *v3d) -{ - struct file_system_type *type; - struct fs_context *fc; - struct vfsmount *gemfs; - int ret; - - /* - * By creating our own shmemfs mountpoint, we can pass in - * mount flags that better match our usecase. However, we - * only do so on platforms which benefit from it. - */ - if (!IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE)) - goto err; - - /* The user doesn't want to enable Super Pages */ - if (!super_pages) - goto err; - - type =3D get_fs_type("tmpfs"); - if (!type) - goto err; - - fc =3D fs_context_for_mount(type, SB_KERNMOUNT); - if (IS_ERR(fc)) - goto err; - ret =3D vfs_parse_fs_string(fc, "source", "tmpfs"); - if (!ret) - ret =3D vfs_parse_fs_string(fc, "huge", "within_size"); - if (!ret) - gemfs =3D fc_mount_longterm(fc); - put_fs_context(fc); - if (ret) - goto err; - - v3d->gemfs =3D gemfs; - drm_info(&v3d->drm, "Using Transparent Hugepages\n"); - - return; - -err: - v3d->gemfs =3D NULL; - drm_notice(&v3d->drm, - "Transparent Hugepage support is recommended for optimal performance = on this platform!\n"); -} - -void v3d_gemfs_fini(struct v3d_dev *v3d) -{ - if (v3d->gemfs) - kern_unmount(v3d->gemfs); -} --=20 2.47.3