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Thu, 3 Nov 2022 15:14:59 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id kA2nM/PaY2PBGgAAMHmgww (envelope-from ); Thu, 03 Nov 2022 15:14:59 +0000 From: Thomas Zimmermann To: daniel@ffwll.ch, airlied@gmail.com, sam@ravnborg.org, javierm@redhat.com, mripard@kernel.org, maarten.lankhorst@linux.intel.com Cc: "linux-hyperv@vger.kernel.orglinux-hyperv"@vger.kernel.org, linux-aspeed@lists.ozlabs.org, nouveau@lists.freedesktop.org, dri-devel@lists.freedesktop.org, virtualization@lists.linux-foundation.org, linux-stm32@st-md-mailman.stormreply.com, linux-samsung-soc@vger.kernel.org, amd-gfx@lists.freedesktop.org, linux-rockchip@lists.infradead.org, xen-devel@lists.xenproject.org, linux-sunxi@lists.linux.dev, linux-arm-msm@vger.kernel.org, intel-gfx@lists.freedesktop.org, etnaviv@lists.freedesktop.org, linux-mediatek@lists.infradead.org, spice-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-mips@vger.kernel.org, linux-renesas-soc@vger.kernel.org, freedreno@lists.freedesktop.org, Thomas Zimmermann Subject: [PATCH v3 20/23] drm/fb-helper: Set flag in struct drm_fb_helper for leaking physical addresses Date: Thu, 3 Nov 2022 16:14:43 +0100 Message-Id: <20221103151446.2638-21-tzimmermann@suse.de> X-Mailer: git-send-email 2.38.0 In-Reply-To: <20221103151446.2638-1-tzimmermann@suse.de> References: <20221103151446.2638-1-tzimmermann@suse.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20221103_081510_928397_C38CD744 X-CRM114-Status: GOOD ( 13.98 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Uncouple the parameter drm_leak_fbdev_smem from the implementation by setting a flag in struct drm_fb_helper. This will help to move the generic fbdev emulation into its own source file, while keeping the parameter in drm_fb_helper.c. No functional changes. Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas --- drivers/gpu/drm/drm_fb_helper.c | 10 +++++++--- include/drm/drm_fb_helper.h | 2 ++ 2 files changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 95f389433c4a6..105d9c8fe3250 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -74,7 +74,7 @@ MODULE_PARM_DESC(drm_fbdev_overalloc, * considered as a broken and legacy behaviour from a modern fbdev device. */ #if IS_ENABLED(CONFIG_DRM_FBDEV_LEAK_PHYS_SMEM) -static bool drm_leak_fbdev_smem = false; +static bool drm_leak_fbdev_smem; module_param_unsafe(drm_leak_fbdev_smem, bool, 0600); MODULE_PARM_DESC(drm_leak_fbdev_smem, "Allow unsafe leaking fbdev physical smem address [default=false]"); @@ -1968,6 +1968,10 @@ static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, sizes.surface_height = config->max_height; } +#if IS_ENABLED(CONFIG_DRM_FBDEV_LEAK_PHYS_SMEM) + fb_helper->hint_leak_smem_start = drm_leak_fbdev_smem; +#endif + /* push down into drivers */ ret = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); if (ret < 0) @@ -2165,7 +2169,7 @@ __drm_fb_helper_initial_config_and_unlock(struct drm_fb_helper *fb_helper, info->var.pixclock = 0; /* Shamelessly allow physical address leaking to userspace */ #if IS_ENABLED(CONFIG_DRM_FBDEV_LEAK_PHYS_SMEM) - if (!drm_leak_fbdev_smem) + if (!fb_helper->hint_leak_smem_start) #endif /* don't leak any physical addresses to userspace */ info->flags |= FBINFO_HIDE_SMEM_START; @@ -2564,7 +2568,7 @@ static int drm_fb_helper_generic_probe(struct drm_fb_helper *fb_helper, * case. */ #if IS_ENABLED(CONFIG_DRM_FBDEV_LEAK_PHYS_SMEM) - if (drm_leak_fbdev_smem && fbi->fix.smem_start == 0 && + if (fb_helper->hint_leak_smem_start && fbi->fix.smem_start == 0 && !drm_WARN_ON_ONCE(dev, map.is_iomem)) fbi->fix.smem_start = page_to_phys(virt_to_page(fbi->screen_buffer)); diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h index 6581183618b89..3dfb5d1093871 100644 --- a/include/drm/drm_fb_helper.h +++ b/include/drm/drm_fb_helper.h @@ -199,6 +199,8 @@ struct drm_fb_helper { * See also: @deferred_setup */ int preferred_bpp; + + bool hint_leak_smem_start; }; static inline struct drm_fb_helper *