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[209.85.220.73]) by mx.google.com with SMTPS id a11sor1321772vka.18.2019.03.20.07.52.30 for (Google Transport Security); Wed, 20 Mar 2019 07:52:30 -0700 (PDT) Received-SPF: pass (google.com: domain of 3rvosxaokcigmzp3qawz7xs00sxq.o0yxuz69-yyw7mow.03s@flex--andreyknvl.bounces.google.com designates 209.85.220.73 as permitted sender) client-ip=209.85.220.73; Authentication-Results: mx.google.com; dkim=pass header.i=@google.com header.s=20161025 header.b="cS/GWV3n"; spf=pass (google.com: domain of 3rvosxaokcigmzp3qawz7xs00sxq.o0yxuz69-yyw7mow.03s@flex--andreyknvl.bounces.google.com designates 209.85.220.73 as permitted sender) smtp.mailfrom=3rVOSXAoKCIgmzp3qAwz7xs00sxq.o0yxuz69-yyw7mow.03s@flex--andreyknvl.bounces.google.com; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=google.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=m8A/eWnO1t/szRUY+Sf0prGvVhEq1OhdUwg16kciR9Y=; b=cS/GWV3n1i5lKwRxDER3D1j30wbKLrIjlKCprX6vTMe8cTVCKT78AfLte355OG84/3 9+SHdUMKMpHe6+iOH3VzHT8pjZaRW6z5pqFcAKCDTvZf0KT3SG8dydvzjoFsqtcRHpO+ s7SFViAVxLm68wpAwuS47+5QK7VNwFMa5b5lxPhRs6N/VfdBIHBgFKkHSvd9I7PtKYIh RebKnvIoWsQx14IlpHTag2G1jk9EWaN7+3KeAj9wdOKQHYUJVkQSYeiCwVLs53b9gTS2 jR0wtaevF8SL4RJoxbCrc5cwPvE9OCqov4p9AQcvaLAPdf8xImWPv+ch+hRrKoxeSje1 7BOw== X-Google-Smtp-Source: APXvYqw58aZo87dG3fwjMiai1M3z5FY5q/6ly8PoJSCWFGZ15x+DIhLzfcwRQ16QrQdSY5QNXUz25VoApSfh8lGu X-Received: by 2002:a1f:c507:: with SMTP id v7mr16491398vkf.18.1553093549995; Wed, 20 Mar 2019 07:52:29 -0700 (PDT) Date: Wed, 20 Mar 2019 15:51:28 +0100 In-Reply-To: Message-Id: <017804b2198a906463d634f84777b6087c9b4a40.1553093421.git.andreyknvl@google.com> Mime-Version: 1.0 References: X-Mailer: git-send-email 2.21.0.225.g810b269d1ac-goog Subject: [PATCH v13 14/20] drm/amdgpu, arm64: untag user pointers in amdgpu_ttm_tt_get_user_pages From: Andrey Konovalov To: Catalin Marinas , Will Deacon , Mark Rutland , Robin Murphy , Kees Cook , Kate Stewart , Greg Kroah-Hartman , Andrew Morton , Ingo Molnar , "Kirill A . Shutemov" , Shuah Khan , Vincenzo Frascino , Eric Dumazet , "David S. Miller" , Alexei Starovoitov , Daniel Borkmann , Steven Rostedt , Ingo Molnar , Peter Zijlstra , Arnaldo Carvalho de Melo , Alex Deucher , "=?UTF-8?q?Christian=20K=C3=B6nig?=" , "David (ChunMing) Zhou" , Yishai Hadas , Mauro Carvalho Chehab , Jens Wiklander , Alex Williamson , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, kvm@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Chintan Pandya , Luc Van Oostenryck , Dave Martin , Kevin Brodsky , Szabolcs Nagy , Andrey Konovalov Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: This patch is a part of a series that extends arm64 kernel ABI to allow to pass tagged user pointers (with the top byte set to something else other than 0x00) as syscall arguments. amdgpu_ttm_tt_get_user_pages() uses provided user pointers for vma lookups, which can only by done with untagged pointers. Untag user pointers in this function. Signed-off-by: Andrey Konovalov --- drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c index 73e71e61dc99..891b027fa33b 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c @@ -751,10 +751,11 @@ int amdgpu_ttm_tt_get_user_pages(struct ttm_tt *ttm, struct page **pages) * check that we only use anonymous memory to prevent problems * with writeback */ - unsigned long end = gtt->userptr + ttm->num_pages * PAGE_SIZE; + unsigned long userptr = untagged_addr(gtt->userptr); + unsigned long end = userptr + ttm->num_pages * PAGE_SIZE; struct vm_area_struct *vma; - vma = find_vma(mm, gtt->userptr); + vma = find_vma(mm, userptr); if (!vma || vma->vm_file || vma->vm_end < end) { up_read(&mm->mmap_sem); return -EPERM; -- 2.21.0.225.g810b269d1ac-goog