From nobody Mon Oct 6 10:18:51 2025 Received: from sender4-op-o15.zoho.com (sender4-op-o15.zoho.com [136.143.188.15]) (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 0925E288524 for ; Tue, 22 Jul 2025 11:21:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.15 ARC-Seal: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753183307; cv=pass; b=O8L9pLrD3rm6UuAqofy5CtScdYO/JPJn5BEK+IqHwve4BaLnfLizkfuFNV4ko7KCxgLunRn6JVpYUTJ/Z1eyVB3AJWHdjZD4YbKQ6FcUHmJ2Oaa5t1JwtVi7K6KBP0wnTEYkFLFdGSutgvCQLZGsRa4AV99jh7l2WU4bQBzWb7I= ARC-Message-Signature: i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1753183307; c=relaxed/simple; bh=IOe/omysrzOZBfroVlR5LysntqapPOAEaNMogJ0WCo0=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=RYtD54OKMwZiyo2MzuuBOeAH6jplY3GHMOn4P75lmuE/i8ZF7OAG/sjecpGmGE5nhDNNV/5pRxUSKHtjHWZZ2FWf8GjWrwbCYD3h82xH7vxdQSEoccf9Lhgd53qjoEBeeGcDZUw2DM6ZncbyrEOzd1aF9znTrCwf3lvD/BnjnXE= ARC-Authentication-Results: i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=icenowy.me; spf=pass smtp.mailfrom=icenowy.me; dkim=pass (2048-bit key) header.d=icenowy.me header.i=uwu@icenowy.me header.b=TZ6myj7n; arc=pass smtp.client-ip=136.143.188.15 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=icenowy.me Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=icenowy.me Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=icenowy.me header.i=uwu@icenowy.me header.b="TZ6myj7n" ARC-Seal: i=1; a=rsa-sha256; t=1753183273; cv=none; d=zohomail.com; s=zohoarc; b=Gv9oGH68zKdRkIgjVM1zHmhUNikzYByusvfpbbSI3qQrbR6dy7qMYYwdrP+vfVtzjqSY3lUQygV2QTV/Hu1Ti5IJpeQ8rKdG22+0BAYZr0tNvlz9JqyAZ2y3T+rbZe50Mi4MhWEO14deO3OcSdCjzpt1BDVU2sZDspacWWB7heg= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1753183273; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:MIME-Version:Message-ID:Subject:Subject:To:To:Message-Id:Reply-To; bh=FmEk2snejcbJWJ/01YuvjfvZovqB2NJooCH4yUHlJEc=; b=B24BUEmKFJAz5yfFZeg5er2Np9zSmQYtrHTHcIqcQYsKrwpBi9jthCB1aH6NLfP4KhDQaCqUOCBndWWI7Dqq5GoTehMGhU3aQGETCOCjahgK9BGvZqk+P3460BfoA1nGGNLGBB1p1KTuBTHVTozOORhc6563ExzGPRN1d9cc5tk= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=icenowy.me; spf=pass smtp.mailfrom=uwu@icenowy.me; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1753183273; s=zmail2; d=icenowy.me; i=uwu@icenowy.me; h=From:From:To:To:Cc:Cc:Subject:Subject:Date:Date:Message-ID:MIME-Version:Content-Transfer-Encoding:Message-Id:Reply-To; bh=FmEk2snejcbJWJ/01YuvjfvZovqB2NJooCH4yUHlJEc=; b=TZ6myj7noYo/vloSK0+qJn14TElPvDkOLnV5/7kic+HAO8Qdthw7GMjZEZUJJdFi qJJkpLbCew9GtF4j3OBAD/EGxtlgqClS9ltt3MBSM9G9vlJOXqXdZEUOM2DANShjwF7 wibTDBRYgilWN6uiJ9RDRtQDh91rdmrG/UzFcbEC/+Un8X5Pc+VkmXnuTB3OCZtF2o7 xFQkdSYwDrlaT63t9a0R+dH5TenGOie2A50uNZl56lSj7hRUScy78fNMR5wSyFOHkDV sQZ4bnGxMt9GxW22cVKDGfEaUAHnPcE/EuIio2MJ9gjZavtajc7SNeF70S8TpHczmwY sjw4Lxro0g== Received: by mx.zohomail.com with SMTPS id 1753183268062183.51689612735777; Tue, 22 Jul 2025 04:21:08 -0700 (PDT) From: Icenowy Zheng To: Christian Koenig , Huang Rui , Matthew Auld , Matthew Brost , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Han Gao , Vivian Wang , Inochi Amaoto , Yao Zi , Icenowy Zheng Subject: [PATCH] drm/ttm: add pgprot handling for RISC-V Date: Tue, 22 Jul 2025 19:20:50 +0800 Message-ID: <20250722112050.909616-1-uwu@icenowy.me> X-Mailer: git-send-email 2.50.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMailClient: External Content-Type: text/plain; charset="utf-8" The RISC-V Svpbmt privileged extension provides support for overriding page memory coherency attributes, and, along with vendor extensions like Xtheadmae, supports pgprot_{writecombine,noncached} on RISC-V. Adapt the codepath that maps ttm_write_combined to pgprot_writecombine and ttm_noncached to pgprot_noncached to RISC-V, to allow proper page access attributes. Signed-off-by: Icenowy Zheng Tested-by: Han Gao --- drivers/gpu/drm/ttm/ttm_module.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/ttm/ttm_module.c b/drivers/gpu/drm/ttm/ttm_mod= ule.c index b3fffe7b5062..aa137ead5cc5 100644 --- a/drivers/gpu/drm/ttm/ttm_module.c +++ b/drivers/gpu/drm/ttm/ttm_module.c @@ -74,7 +74,8 @@ pgprot_t ttm_prot_from_caching(enum ttm_caching caching, = pgprot_t tmp) #endif /* CONFIG_UML */ #endif /* __i386__ || __x86_64__ */ #if defined(__ia64__) || defined(__arm__) || defined(__aarch64__) || \ - defined(__powerpc__) || defined(__mips__) || defined(__loongarch__) + defined(__powerpc__) || defined(__mips__) || defined(__loongarch__) || \ + defined(__riscv) if (caching =3D=3D ttm_write_combined) tmp =3D pgprot_writecombine(tmp); else --=20 2.50.1