From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 69185C3ABCD for ; Mon, 12 May 2025 12:34:40 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0417D10E3CF; Mon, 12 May 2025 12:34:36 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.b="ZJq+mvy0"; dkim-atps=neutral Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6EDF810E3D8 for ; Mon, 12 May 2025 12:34:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1747053273; 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=hrbmXyUL7HXGUWgagRU2heQ2lgkOZ/iJWMnvv1t5buw=; b=ZJq+mvy0ZvefcuZmdyp5+Ui0gRr8WkpSKT50kAy38LViqzN3J1US0nIMFE5yBf7hXilS4C s3VP5/PK1/KEG8VtUALrm0QeJ0/fERZUzq8AQ+Pt4p8U1q4TMnjy1J1G4ni+vcMPl+6PPF o7O0p2Frt0qt61wBdyzUV8POw72MAJE= Received: from mail-wm1-f70.google.com (mail-wm1-f70.google.com [209.85.128.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-447-PUL2WvUwPb2Ij2KCrmGS2A-1; Mon, 12 May 2025 08:34:30 -0400 X-MC-Unique: PUL2WvUwPb2Ij2KCrmGS2A-1 X-Mimecast-MFC-AGG-ID: PUL2WvUwPb2Ij2KCrmGS2A_1747053269 Received: by mail-wm1-f70.google.com with SMTP id 5b1f17b1804b1-43cf44b66f7so24844805e9.1 for ; Mon, 12 May 2025 05:34:30 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1747053269; x=1747658069; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=hrbmXyUL7HXGUWgagRU2heQ2lgkOZ/iJWMnvv1t5buw=; b=iz9ri9E9Cevodoci7jGBCC1Sh7Ry/U38XlVQm2Zp39jo7Bs4E6NH3Zg5+CiYtFmXzy whhRy+l2lfF5oj0DvRiz8Dt5Hg4Pof+AG/R5yKk1PUcy+UMjJGqi8WAOo541eJpu92OP cWgO/mQoBrdWgaI4bab6XexQTXsNrymDJy7tE4WsP1O0RzzsLGuhl9fMODlBvWIiS5gv DxKpRISbzCahtW/bvGukwdP2RQkcdvAKMAsMsAZBw90pEmX/GtMnngIvw2brCExN4DpS SLfCl6bJIHV6vbyyCjXVffFoSrgBOlb9JQA9WxVrSjiYb6z2gCkNS9x4m97uv8DRgfdm Fhrg== X-Forwarded-Encrypted: i=1; AJvYcCWTyDq0Eoflk+tBGgNHnrZUOsjr64YLcy35eHLVzIWee8B9lAiXkviqGrNSG/P0a0GofWRKwKCp7qo=@lists.freedesktop.org X-Gm-Message-State: AOJu0Ywym8YVwEUtL7N46sp2Q3WTG7JpAFOtWeWXZay9M1YgOxmSFypA o4gfncjV0f/b4ENyLmeIcMp30x8SvjKKB8LeqC+Tnoef0l8ojUB7EP89vNTiQEHLA8qJ7sEr8cd AneVbeO+uR4OC8xqw94xgP5DpZ7wvzbO3L8z+nA2Yk1P7UXVJXH00DPUFIfjPq8cPXA== X-Gm-Gg: ASbGnct5vAfCma18PwCQdhgwKpcLXXnXJQtyEdvjvuEcETQZINhphy+aTYDmSle8rz3 zHgwmQhpYoeqPReXJ0FjmcKWZZqgo+V0dWMwce81GBmXLk8xX/qHWNq//szJ8UBfkLWd+JpLelN Ex2DX/L4BM7ij+9hr4gihLoxaJDJJxf1fHT+/l/uEEEm5TFknLrjk6e4bn60omCMT7ks1msVD51 WsuYV48+5aanOPSPMUARlwF0Rh3xlss9xigzpmF7jlzYYFbAb16zRRNJ+5yAfr36bvUXZeW+FI2 gOU+ECnZANj+Gb7If/y3yYrsEJMxAvtv/Xh9nBDxq2g/fHOaNWYIC5Bukbt0F285MxzHwupb X-Received: by 2002:a05:600c:444c:b0:43d:5ec:b2f4 with SMTP id 5b1f17b1804b1-442d6d3dcc8mr126249975e9.10.1747053269222; Mon, 12 May 2025 05:34:29 -0700 (PDT) X-Google-Smtp-Source: AGHT+IF7YFyagUZ9y+fevUV3BzP4ffMO+2lnku0MMlhrkvHNYDdbfZ5KLiwSKLyxUHWcSulKlrGmcw== X-Received: by 2002:a05:600c:444c:b0:43d:5ec:b2f4 with SMTP id 5b1f17b1804b1-442d6d3dcc8mr126249585e9.10.1747053268821; Mon, 12 May 2025 05:34:28 -0700 (PDT) Received: from localhost (p200300d82f4a5800f1ae8e20d7f451b0.dip0.t-ipconnect.de. [2003:d8:2f4a:5800:f1ae:8e20:d7f4:51b0]) by smtp.gmail.com with UTF8SMTPSA id 5b1f17b1804b1-442d687adc0sm123327975e9.35.2025.05.12.05.34.27 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 12 May 2025 05:34:28 -0700 (PDT) From: David Hildenbrand To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, x86@kernel.org, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-trace-kernel@vger.kernel.org, David Hildenbrand , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" , Jani Nikula , Joonas Lahtinen , Rodrigo Vivi , Tvrtko Ursulin , David Airlie , Simona Vetter , Andrew Morton , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , "Liam R. Howlett" , Lorenzo Stoakes , Vlastimil Babka , Jann Horn , Pedro Falcato , Peter Xu , Ingo Molnar Subject: [PATCH v2 01/11] x86/mm/pat: factor out setting cachemode into pgprot_set_cachemode() Date: Mon, 12 May 2025 14:34:14 +0200 Message-ID: <20250512123424.637989-2-david@redhat.com> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250512123424.637989-1-david@redhat.com> References: <20250512123424.637989-1-david@redhat.com> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: LDLJ0VnThsBLuh4qGoFh7Z3BPKYOF7nxecfLPB50nFo_1747053269 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Let's factor it out to make the code easier to grasp. Drop one comment where it is now rather obvious what is happening. Use it also in pgprot_writecombine()/pgprot_writethrough() where clearing the old cachemode might not be required, but given that we are already doing a function call, no need to care about this micro-optimization. Reviewed-by: Lorenzo Stoakes Acked-by: Ingo Molnar # x86 bits Signed-off-by: David Hildenbrand --- arch/x86/mm/pat/memtype.c | 33 +++++++++++++++------------------ 1 file changed, 15 insertions(+), 18 deletions(-) diff --git a/arch/x86/mm/pat/memtype.c b/arch/x86/mm/pat/memtype.c index 72d8cbc611583..edec5859651d6 100644 --- a/arch/x86/mm/pat/memtype.c +++ b/arch/x86/mm/pat/memtype.c @@ -800,6 +800,12 @@ static inline int range_is_allowed(unsigned long pfn, unsigned long size) } #endif /* CONFIG_STRICT_DEVMEM */ +static inline void pgprot_set_cachemode(pgprot_t *prot, enum page_cache_mode pcm) +{ + *prot = __pgprot((pgprot_val(*prot) & ~_PAGE_CACHE_MASK) | + cachemode2protval(pcm)); +} + int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn, unsigned long size, pgprot_t *vma_prot) { @@ -811,8 +817,7 @@ int phys_mem_access_prot_allowed(struct file *file, unsigned long pfn, if (file->f_flags & O_DSYNC) pcm = _PAGE_CACHE_MODE_UC_MINUS; - *vma_prot = __pgprot((pgprot_val(*vma_prot) & ~_PAGE_CACHE_MASK) | - cachemode2protval(pcm)); + pgprot_set_cachemode(vma_prot, pcm); return 1; } @@ -880,9 +885,7 @@ static int reserve_pfn_range(u64 paddr, unsigned long size, pgprot_t *vma_prot, (unsigned long long)paddr, (unsigned long long)(paddr + size - 1), cattr_name(pcm)); - *vma_prot = __pgprot((pgprot_val(*vma_prot) & - (~_PAGE_CACHE_MASK)) | - cachemode2protval(pcm)); + pgprot_set_cachemode(vma_prot, pcm); } return 0; } @@ -907,9 +910,7 @@ static int reserve_pfn_range(u64 paddr, unsigned long size, pgprot_t *vma_prot, * We allow returning different type than the one requested in * non strict case. */ - *vma_prot = __pgprot((pgprot_val(*vma_prot) & - (~_PAGE_CACHE_MASK)) | - cachemode2protval(pcm)); + pgprot_set_cachemode(vma_prot, pcm); } if (memtype_kernel_map_sync(paddr, size, pcm) < 0) { @@ -1060,9 +1061,7 @@ int track_pfn_remap(struct vm_area_struct *vma, pgprot_t *prot, return -EINVAL; } - *prot = __pgprot((pgprot_val(*prot) & (~_PAGE_CACHE_MASK)) | - cachemode2protval(pcm)); - + pgprot_set_cachemode(prot, pcm); return 0; } @@ -1073,10 +1072,8 @@ void track_pfn_insert(struct vm_area_struct *vma, pgprot_t *prot, pfn_t pfn) if (!pat_enabled()) return; - /* Set prot based on lookup */ pcm = lookup_memtype(pfn_t_to_phys(pfn)); - *prot = __pgprot((pgprot_val(*prot) & (~_PAGE_CACHE_MASK)) | - cachemode2protval(pcm)); + pgprot_set_cachemode(prot, pcm); } /* @@ -1115,15 +1112,15 @@ void untrack_pfn_clear(struct vm_area_struct *vma) pgprot_t pgprot_writecombine(pgprot_t prot) { - return __pgprot(pgprot_val(prot) | - cachemode2protval(_PAGE_CACHE_MODE_WC)); + pgprot_set_cachemode(&prot, _PAGE_CACHE_MODE_WC); + return prot; } EXPORT_SYMBOL_GPL(pgprot_writecombine); pgprot_t pgprot_writethrough(pgprot_t prot) { - return __pgprot(pgprot_val(prot) | - cachemode2protval(_PAGE_CACHE_MODE_WT)); + pgprot_set_cachemode(&prot, _PAGE_CACHE_MODE_WT); + return prot; } EXPORT_SYMBOL_GPL(pgprot_writethrough); -- 2.49.0