Message ID | 50293fea168d5252f79ee0bf160c64c72edbf270.1560339705.git.andreyknvl@google.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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[209.85.220.73]) by mx.google.com with SMTPS id v83sor9203215qkb.100.2019.06.12.04.44.11 for <linux-mm@kvack.org> (Google Transport Security); Wed, 12 Jun 2019 04:44:11 -0700 (PDT) Received-SPF: pass (google.com: domain of 3i-uaxqokcegkxn1o8ux5vqyyqvo.mywvsx47-wwu5kmu.y1q@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=UD79Ay48; spf=pass (google.com: domain of 3i-uaxqokcegkxn1o8ux5vqyyqvo.mywvsx47-wwu5kmu.y1q@flex--andreyknvl.bounces.google.com designates 209.85.220.73 as permitted sender) smtp.mailfrom=3i-UAXQoKCEgkxn1o8ux5vqyyqvo.mywvsx47-wwu5kmu.y1q@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=eb4SnUCHaoFPTU0EqMrx7H6L5ANcvzM3zwsiyq0FV40=; b=UD79Ay48r+Qt/fUB4eQQS+u7jB3BFWRYtdLCt6Qa95VfLfmvvw7Hya/RkyTUwkhx0D +1vmB8M4RBQZbJNIhwkYxv5AEL21ErrNvQCQ8+lOs4BCA4LMOTjJTuV8BlTNIfNEsvvi S8RTYx74gNWKftQMTjEJ+kHo6ZnD8masl8ZG8ezS9xy8uaiMn8te593VaiscKSGKojp2 e5Cc4FqtUoN3q8YTe+OydLtjYtDNOm5Wm5t/bbuGQhbg9sf44AZgifS6zPiIE4WlbsCF 2CX+HbBHE4vO/HCGylKIpSsIsXiK8frsZe8Lb15lkTfFpYP5OsKznhL91S0FrbJQy23X yoqw== X-Google-Smtp-Source: APXvYqziQbsGJB+s1a1ziaRcl+e8Gmo6MzSM6gFLtwRxsTnl2K0xyr2RS7DkrrH2w0nPz/f56zeYNt9ix1U3jsHZ X-Received: by 2002:ae9:f107:: with SMTP id k7mr2472892qkg.215.1560339851579; Wed, 12 Jun 2019 04:44:11 -0700 (PDT) Date: Wed, 12 Jun 2019 13:43:28 +0200 In-Reply-To: <cover.1560339705.git.andreyknvl@google.com> Message-Id: <50293fea168d5252f79ee0bf160c64c72edbf270.1560339705.git.andreyknvl@google.com> Mime-Version: 1.0 References: <cover.1560339705.git.andreyknvl@google.com> X-Mailer: git-send-email 2.22.0.rc2.383.gf4fbbf30c2-goog Subject: [PATCH v17 11/15] IB/mlx4, arm64: untag user pointers in mlx4_get_umem_mr From: Andrey Konovalov <andreyknvl@google.com> To: linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@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 Cc: Catalin Marinas <catalin.marinas@arm.com>, Vincenzo Frascino <vincenzo.frascino@arm.com>, Will Deacon <will.deacon@arm.com>, Mark Rutland <mark.rutland@arm.com>, Andrew Morton <akpm@linux-foundation.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Kees Cook <keescook@chromium.org>, Yishai Hadas <yishaih@mellanox.com>, Felix Kuehling <Felix.Kuehling@amd.com>, Alexander Deucher <Alexander.Deucher@amd.com>, Christian Koenig <Christian.Koenig@amd.com>, Mauro Carvalho Chehab <mchehab@kernel.org>, Jens Wiklander <jens.wiklander@linaro.org>, Alex Williamson <alex.williamson@redhat.com>, Leon Romanovsky <leon@kernel.org>, Luc Van Oostenryck <luc.vanoostenryck@gmail.com>, Dave Martin <Dave.Martin@arm.com>, Khalid Aziz <khalid.aziz@oracle.com>, enh <enh@google.com>, Jason Gunthorpe <jgg@ziepe.ca>, Christoph Hellwig <hch@infradead.org>, Dmitry Vyukov <dvyukov@google.com>, Kostya Serebryany <kcc@google.com>, Evgeniy Stepanov <eugenis@google.com>, Lee Smith <Lee.Smith@arm.com>, Ramana Radhakrishnan <Ramana.Radhakrishnan@arm.com>, Jacob Bramley <Jacob.Bramley@arm.com>, Ruben Ayrapetyan <Ruben.Ayrapetyan@arm.com>, Robin Murphy <robin.murphy@arm.com>, Kevin Brodsky <kevin.brodsky@arm.com>, Szabolcs Nagy <Szabolcs.Nagy@arm.com>, Andrey Konovalov <andreyknvl@google.com> 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: <linux-mm.kvack.org> X-Virus-Scanned: ClamAV using ClamSMTP |
Series |
arm64: untag user pointers passed to the kernel
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diff --git a/drivers/infiniband/hw/mlx4/mr.c b/drivers/infiniband/hw/mlx4/mr.c index 355205a28544..13d9f917f249 100644 --- a/drivers/infiniband/hw/mlx4/mr.c +++ b/drivers/infiniband/hw/mlx4/mr.c @@ -378,6 +378,7 @@ static struct ib_umem *mlx4_get_umem_mr(struct ib_udata *udata, u64 start, * again */ if (!ib_access_writable(access_flags)) { + unsigned long untagged_start = untagged_addr(start); struct vm_area_struct *vma; down_read(¤t->mm->mmap_sem); @@ -386,9 +387,9 @@ static struct ib_umem *mlx4_get_umem_mr(struct ib_udata *udata, u64 start, * cover the memory, but for now it requires a single vma to * entirely cover the MR to support RO mappings. */ - vma = find_vma(current->mm, start); - if (vma && vma->vm_end >= start + length && - vma->vm_start <= start) { + vma = find_vma(current->mm, untagged_start); + if (vma && vma->vm_end >= untagged_start + length && + vma->vm_start <= untagged_start) { if (vma->vm_flags & VM_WRITE) access_flags |= IB_ACCESS_LOCAL_WRITE; } else {
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. mlx4_get_umem_mr() 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 <andreyknvl@google.com> --- drivers/infiniband/hw/mlx4/mr.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-)