Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
63 lines
1.3 KiB
C
63 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/* Copyright (C) 2024 Raspberry Pi */
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#include <linux/fs.h>
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#include <linux/mount.h>
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#include <linux/fs_context.h>
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#include <drm/drm_print.h>
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#include "v3d_drv.h"
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void v3d_gemfs_init(struct v3d_dev *v3d)
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{
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struct file_system_type *type;
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struct fs_context *fc;
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struct vfsmount *gemfs;
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int ret;
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/*
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* By creating our own shmemfs mountpoint, we can pass in
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* mount flags that better match our usecase. However, we
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* only do so on platforms which benefit from it.
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*/
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if (!IS_ENABLED(CONFIG_TRANSPARENT_HUGEPAGE))
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goto err;
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/* The user doesn't want to enable Super Pages */
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if (!super_pages)
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goto err;
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type = get_fs_type("tmpfs");
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if (!type)
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goto err;
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fc = fs_context_for_mount(type, SB_KERNMOUNT);
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if (IS_ERR(fc))
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goto err;
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ret = vfs_parse_fs_string(fc, "source", "tmpfs");
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if (!ret)
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ret = vfs_parse_fs_string(fc, "huge", "within_size");
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if (!ret)
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gemfs = fc_mount_longterm(fc);
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put_fs_context(fc);
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if (ret)
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goto err;
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v3d->gemfs = gemfs;
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drm_info(&v3d->drm, "Using Transparent Hugepages\n");
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return;
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err:
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v3d->gemfs = NULL;
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drm_notice(&v3d->drm,
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"Transparent Hugepage support is recommended for optimal performance on this platform!\n");
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}
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void v3d_gemfs_fini(struct v3d_dev *v3d)
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{
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if (v3d->gemfs)
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kern_unmount(v3d->gemfs);
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}
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