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Mon, 5 Oct 2020 15:43:32 +0000 (UTC) Received: from localhost (ovpn-112-117.ams2.redhat.com [10.36.112.117]) by smtp.corp.redhat.com (Postfix) with ESMTP id 72D3555764; Mon, 5 Oct 2020 15:43:29 +0000 (UTC) From: Stefan Hajnoczi To: qemu-devel@nongnu.org, Peter Maydell Subject: [PULL v2 01/17] util/vfio-helpers: Pass page protections to qemu_vfio_pci_map_bar() Date: Mon, 5 Oct 2020 16:43:07 +0100 Message-Id: <20201005154323.31347-2-stefanha@redhat.com> In-Reply-To: <20201005154323.31347-1-stefanha@redhat.com> References: <20201005154323.31347-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=stefanha@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=63.128.21.124; envelope-from=stefanha@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/05 01:25:11 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.733, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Fam Zheng , Eduardo Habkost , qemu-block@nongnu.org, Max Reitz , Stefan Hajnoczi , Cleber Rosa , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Philippe Mathieu-Daudé Pages are currently mapped READ/WRITE. To be able to use different protections, add a new argument to qemu_vfio_pci_map_bar(). Signed-off-by: Philippe Mathieu-Daudé Signed-off-by: Stefan Hajnoczi Message-Id: <20200922083821.578519-2-philmd@redhat.com> --- include/qemu/vfio-helpers.h | 2 +- block/nvme.c | 3 ++- util/vfio-helpers.c | 4 ++-- 3 files changed, 5 insertions(+), 4 deletions(-) diff --git a/include/qemu/vfio-helpers.h b/include/qemu/vfio-helpers.h index 1f057c2b9e..4491c8e1a6 100644 --- a/include/qemu/vfio-helpers.h +++ b/include/qemu/vfio-helpers.h @@ -22,7 +22,7 @@ int qemu_vfio_dma_map(QEMUVFIOState *s, void *host, size_t size, int qemu_vfio_dma_reset_temporary(QEMUVFIOState *s); void qemu_vfio_dma_unmap(QEMUVFIOState *s, void *host); void *qemu_vfio_pci_map_bar(QEMUVFIOState *s, int index, - uint64_t offset, uint64_t size, + uint64_t offset, uint64_t size, int prot, Error **errp); void qemu_vfio_pci_unmap_bar(QEMUVFIOState *s, int index, void *bar, uint64_t offset, uint64_t size); diff --git a/block/nvme.c b/block/nvme.c index f4f27b6da7..5a4dc6a722 100644 --- a/block/nvme.c +++ b/block/nvme.c @@ -712,7 +712,8 @@ static int nvme_init(BlockDriverState *bs, const char *device, int namespace, goto out; } - s->regs = qemu_vfio_pci_map_bar(s->vfio, 0, 0, NVME_BAR_SIZE, errp); + s->regs = qemu_vfio_pci_map_bar(s->vfio, 0, 0, NVME_BAR_SIZE, + PROT_READ | PROT_WRITE, errp); if (!s->regs) { ret = -EINVAL; goto out; diff --git a/util/vfio-helpers.c b/util/vfio-helpers.c index 583bdfb36f..9ac307e3d4 100644 --- a/util/vfio-helpers.c +++ b/util/vfio-helpers.c @@ -146,13 +146,13 @@ static int qemu_vfio_pci_init_bar(QEMUVFIOState *s, int index, Error **errp) * Map a PCI bar area. */ void *qemu_vfio_pci_map_bar(QEMUVFIOState *s, int index, - uint64_t offset, uint64_t size, + uint64_t offset, uint64_t size, int prot, Error **errp) { void *p; assert_bar_index_valid(s, index); p = mmap(NULL, MIN(size, s->bar_region_info[index].size - offset), - PROT_READ | PROT_WRITE, MAP_SHARED, + prot, MAP_SHARED, s->device, s->bar_region_info[index].offset + offset); if (p == MAP_FAILED) { error_setg_errno(errp, errno, "Failed to map BAR region");