From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:58486) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fmlub-0006SX-Tg for qemu-devel@nongnu.org; Mon, 06 Aug 2018 16:15:31 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fmlua-0006uJ-NG for qemu-devel@nongnu.org; Mon, 06 Aug 2018 16:15:29 -0400 From: Eric Auger Date: Mon, 6 Aug 2018 22:14:38 +0200 Message-Id: <1533586484-5737-11-git-send-email-eric.auger@redhat.com> In-Reply-To: <1533586484-5737-1-git-send-email-eric.auger@redhat.com> References: <1533586484-5737-1-git-send-email-eric.auger@redhat.com> Subject: [Qemu-devel] [RFC v7 10/16] virtio-iommu: Add an msi_bypass property List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: eric.auger.pro@gmail.com, eric.auger@redhat.com, qemu-devel@nongnu.org, qemu-arm@nongnu.org, peter.maydell@linaro.org, alex.williamson@redhat.com, mst@redhat.com, jean-philippe.brucker@arm.com Cc: will.deacon@arm.com, kevin.tian@intel.com, drjones@redhat.com, wei@redhat.com, tn@semihalf.com, bharat.bhushan@nxp.com, peterx@redhat.com, linuc.decode@gmail.com In case the msi_bypass property is set, it means we need to register the IOAPIC MSI window as a reserved region: 0xFEE00000 - 0xFEEFFFFF. Signed-off-by: Eric Auger --- --- hw/virtio/virtio-iommu.c | 52 ++++++++++++++++++++++++++++++++++++++++ include/hw/virtio/virtio-iommu.h | 1 + 2 files changed, 53 insertions(+) diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c index 0291a04..ec0cf1e 100644 --- a/hw/virtio/virtio-iommu.c +++ b/hw/virtio/virtio-iommu.c @@ -42,6 +42,9 @@ #define VIOMMU_DEFAULT_QUEUE_SIZE 256 #define VIOMMU_PROBE_SIZE 512 +#define IOAPIC_RANGE_START (0xfee00000) +#define IOAPIC_RANGE_SIZE (0x100000) + #define SUPPORTED_PROBE_PROPERTIES (\ VIRTIO_IOMMU_PROBE_T_NONE | \ VIRTIO_IOMMU_PROBE_T_RESV_MEM) @@ -104,6 +107,25 @@ static void virtio_iommu_detach_endpoint_from_domain(viommu_endpoint *ep) ep->domain = NULL; } +static void virtio_iommu_register_resv_region(viommu_endpoint *ep, + uint8_t subtype, + uint64_t start, uint64_t end) +{ + viommu_interval *interval; + struct virtio_iommu_probe_resv_mem *reg; + + interval = g_malloc0(sizeof(*interval)); + interval->low = start; + interval->high = end; + + reg = g_malloc0(sizeof(*reg)); + reg->subtype = subtype; + reg->start = cpu_to_le64(start); + reg->end = cpu_to_le64(end); + + g_tree_insert(ep->reserved_regions, interval, reg); +} + static viommu_endpoint *virtio_iommu_get_endpoint(VirtIOIOMMU *s, uint32_t ep_id) { @@ -121,6 +143,12 @@ static viommu_endpoint *virtio_iommu_get_endpoint(VirtIOIOMMU *s, ep->reserved_regions = g_tree_new_full((GCompareDataFunc)interval_cmp, NULL, (GDestroyNotify)g_free, (GDestroyNotify)g_free); + if (s->msi_bypass) { + virtio_iommu_register_resv_region(ep, VIRTIO_IOMMU_RESV_MEM_T_MSI, + IOAPIC_RANGE_START, + IOAPIC_RANGE_SIZE); + } + return ep; } @@ -841,8 +869,32 @@ static void virtio_iommu_set_status(VirtIODevice *vdev, uint8_t status) trace_virtio_iommu_device_status(status); } +static bool virtio_iommu_get_msi_bypass(Object *obj, Error **errp) +{ + VirtIOIOMMU *s = VIRTIO_IOMMU(obj); + + return s->msi_bypass; +} + +static void virtio_iommu_set_msi_bypass(Object *obj, bool value, Error **errp) +{ + VirtIOIOMMU *s = VIRTIO_IOMMU(obj); + + s->msi_bypass = value; +} + static void virtio_iommu_instance_init(Object *obj) { + VirtIOIOMMU *s = VIRTIO_IOMMU(obj); + + object_property_add_bool(obj, "msi_bypass", virtio_iommu_get_msi_bypass, + virtio_iommu_set_msi_bypass, NULL); + object_property_set_description(obj, "msi_bypass", + "Indicates whether msis are bypassed by " + "the IOMMU. Default is YES", + NULL); + + s->msi_bypass = true; } static const VMStateDescription vmstate_virtio_iommu = { diff --git a/include/hw/virtio/virtio-iommu.h b/include/hw/virtio/virtio-iommu.h index 913e96b..aa20ba4 100644 --- a/include/hw/virtio/virtio-iommu.h +++ b/include/hw/virtio/virtio-iommu.h @@ -58,6 +58,7 @@ typedef struct VirtIOIOMMU { GTree *domains; QemuMutex mutex; GTree *endpoints; + bool msi_bypass; } VirtIOIOMMU; #endif -- 2.5.5