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bh=tx7PPL5IZ0TX3/fiyMAXN29HmQFckjsJgmoCzOjgIW4=; b=e6ayxjnSgcL1Qk9GQHngQKb1wiUkZmuuZz/YvohRPeAYwuidpkABG3ZPuX5yB5q578rVbv PRThks0+8P/N2QfUBMurvdB37Ki8edP8RrtV/zuDsoRTP+5XIvpdu/VE+6nKYqwKOXJbs2 RuLBHkjUjOd6zrAitrSpcXm7u6yIQuE= X-MC-Unique: W3jJ68cUMYS7JxCH3JbXTw-1 From: Stefan Hajnoczi To: Peter Maydell , qemu-devel@nongnu.org Subject: [PULL 01/17] util/vfio-helpers: Pass page protections to qemu_vfio_pci_map_bar() Date: Wed, 30 Sep 2020 11:12:49 +0100 Message-Id: <20200930101305.305302-2-stefanha@redhat.com> In-Reply-To: <20200930101305.305302-1-stefanha@redhat.com> References: <20200930101305.305302-1-stefanha@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 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 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; 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charset="utf-8" From: Philippe Mathieu-Daud=C3=A9 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-Daud=C3=A9 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; } =20 - s->regs =3D qemu_vfio_pci_map_bar(s->vfio, 0, 0, NVME_BAR_SIZE, errp); + s->regs =3D qemu_vfio_pci_map_bar(s->vfio, 0, 0, NVME_BAR_SIZE, + PROT_READ | PROT_WRITE, errp); if (!s->regs) { ret =3D -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, i= nt 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 =3D 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 =3D=3D MAP_FAILED) { error_setg_errno(errp, errno, "Failed to map BAR region"); --=20 2.26.2