From: Auger Eric <eric.auger@redhat.com> To: Peter Xu <peterx@redhat.com> Cc: peter.maydell@linaro.org, kevin.tian@intel.com, mst@redhat.com, tn@semihalf.com, qemu-devel@nongnu.org, alex.williamson@redhat.com, qemu-arm@nongnu.org, jean-philippe@linaro.org, bharat.bhushan@nxp.com, eric.auger.pro@gmail.com Subject: Re: [Qemu-devel] [PATCH for-4.2 v10 07/15] virtio-iommu: Implement attach/detach command Date: Thu, 29 Aug 2019 16:24:24 +0200 Message-ID: <2cf934e9-ff47-72b6-d22c-1fc01c17500e@redhat.com> (raw) In-Reply-To: <20190816042749.GC3114@xz-x1> Hi Peter, On 8/16/19 6:27 AM, Peter Xu wrote: > On Tue, Jul 30, 2019 at 07:21:29PM +0200, Eric Auger wrote: >> This patch implements the endpoint attach/detach to/from >> a domain. >> >> Signed-off-by: Eric Auger <eric.auger@redhat.com> >> >> --- >> --- >> hw/virtio/virtio-iommu.c | 40 ++++++++++++++++++++++++++++++++++------ >> 1 file changed, 34 insertions(+), 6 deletions(-) >> >> diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c >> index 77dccecc0a..5ea0930cc2 100644 >> --- a/hw/virtio/virtio-iommu.c >> +++ b/hw/virtio/virtio-iommu.c >> @@ -80,8 +80,8 @@ static void virtio_iommu_detach_endpoint_from_domain(viommu_endpoint *ep) >> ep->domain = NULL; >> } >> >> -viommu_endpoint *virtio_iommu_get_endpoint(VirtIOIOMMU *s, uint32_t ep_id); >> -viommu_endpoint *virtio_iommu_get_endpoint(VirtIOIOMMU *s, uint32_t ep_id) > > These lines were just introduced in previous patch, I wanted to ask > why the definition was needed but I don't know whether it'll be used > in follow up patches. Looks like it wasn't really used. > > I would prefer patches like these to be squashed together not only to > avoid the maintainance of diffs like this between patches, but also as > a reviewer it'll be easier too when with all the contexts together. > But I won't ask for it because it can be a personal preference only... Yes that's a tradeoff. I tried to split the series to ease the review; helpers were introduced separately in previous patch but not yet used. Here I introduce call sites and they become static. > >> +static viommu_endpoint *virtio_iommu_get_endpoint(VirtIOIOMMU *s, >> + uint32_t ep_id) >> { >> viommu_endpoint *ep; >> >> @@ -110,8 +110,8 @@ static void virtio_iommu_put_endpoint(gpointer data) >> g_free(ep); >> } >> >> -viommu_domain *virtio_iommu_get_domain(VirtIOIOMMU *s, uint32_t domain_id); >> -viommu_domain *virtio_iommu_get_domain(VirtIOIOMMU *s, uint32_t domain_id) >> +static viommu_domain *virtio_iommu_get_domain(VirtIOIOMMU *s, >> + uint32_t domain_id) >> { >> viommu_domain *domain; >> >> @@ -187,10 +187,27 @@ static int virtio_iommu_attach(VirtIOIOMMU *s, >> { >> uint32_t domain_id = le32_to_cpu(req->domain); >> uint32_t ep_id = le32_to_cpu(req->endpoint); >> + viommu_domain *domain; >> + viommu_endpoint *ep; >> >> trace_virtio_iommu_attach(domain_id, ep_id); >> >> - return VIRTIO_IOMMU_S_UNSUPP; >> + ep = virtio_iommu_get_endpoint(s, ep_id); >> + if (ep->domain) { >> + /* >> + * the device is already attached to a domain, >> + * detach it first >> + */ >> + virtio_iommu_detach_endpoint_from_domain(ep); > > Hmm... so this can be called without virtio_iommu_put_endpoint(). > Then I think we'd better move: > > g_tree_unref(ep->domain->mappings); > > From virtio_iommu_put_endpoint() to inside > virtio_iommu_detach_endpoint_from_domain() otherwise domain refs might > leak? I agree with you. I Also removed g_tree_destroy from virtio_iommu_put_domain as detaching all its end points should now do the job. Thanks Eric > >> + } >> + >> + domain = virtio_iommu_get_domain(s, domain_id); >> + QLIST_INSERT_HEAD(&domain->endpoint_list, ep, next); >> + >> + ep->domain = domain; >> + g_tree_ref(domain->mappings); >> + >> + return VIRTIO_IOMMU_S_OK; >> } > > Regards, >
next prev parent reply index Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-07-30 17:21 [Qemu-devel] [PATCH for-4.2 v10 00/15] VIRTIO-IOMMU device Eric Auger 2019-07-30 17:21 ` [Qemu-devel] [PATCH for-4.2 v10 01/15] update-linux-headers: Import virtio_iommu.h Eric Auger 2019-07-30 17:21 ` [Qemu-devel] [PATCH for-4.2 v10 02/15] linux-headers: update against 5.3-rc2 Eric Auger 2019-07-30 17:21 ` [Qemu-devel] [PATCH for-4.2 v10 03/15] virtio-iommu: Add skeleton Eric Auger 2019-08-15 13:54 ` Peter Xu 2019-08-29 12:18 ` Auger Eric 2019-08-30 1:26 ` Peter Xu 2019-08-30 8:12 ` Auger Eric 2019-07-30 17:21 ` [Qemu-devel] [PATCH for-4.2 v10 04/15] virtio-iommu: Decode the command payload Eric Auger 2019-07-30 17:21 ` [Qemu-devel] [PATCH for-4.2 v10 05/15] virtio-iommu: Add the iommu regions Eric Auger 2019-08-16 4:00 ` Peter Xu 2019-08-29 12:51 ` Auger Eric 2019-07-30 17:21 ` [Qemu-devel] [PATCH for-4.2 v10 06/15] virtio-iommu: Endpoint and domains structs and helpers Eric Auger 2019-08-16 4:17 ` Peter Xu 2019-11-04 18:31 ` Jean-Philippe Brucker 2019-11-25 13:14 ` Auger Eric 2019-07-30 17:21 ` [Qemu-devel] [PATCH for-4.2 v10 07/15] virtio-iommu: Implement attach/detach command Eric Auger 2019-08-16 4:27 ` Peter Xu 2019-08-29 14:24 ` Auger Eric [this message] 2019-07-30 17:21 ` [Qemu-devel] [PATCH for-4.2 v10 08/15] virtio-iommu: Implement map/unmap Eric Auger 2019-08-19 8:11 ` Peter Xu 2019-09-03 11:37 ` Auger Eric 2019-09-04 1:44 ` Peter Xu 2019-09-04 4:23 ` Tian, Kevin 2019-09-04 5:37 ` Peter Xu 2019-09-04 5:46 ` Tian, Kevin 2019-09-04 7:54 ` Auger Eric 2019-09-04 8:32 ` Peter Xu 2019-07-30 17:21 ` [Qemu-devel] [PATCH for-4.2 v10 09/15] virtio-iommu: Implement translate Eric Auger 2019-08-19 8:24 ` Peter Xu 2019-09-03 11:45 ` Auger Eric 2019-09-04 1:58 ` Peter Xu 2019-07-30 17:21 ` [Qemu-devel] [PATCH for-4.2 v10 10/15] virtio-iommu: Implement probe request Eric Auger 2019-08-19 12:08 ` Peter Xu 2019-09-03 12:23 ` Auger Eric 2019-07-30 17:21 ` [Qemu-devel] [PATCH for-4.2 v10 11/15] virtio-iommu: Expose the IOAPIC MSI reserved region when relevant Eric Auger 2019-07-30 19:38 ` Michael S. Tsirkin 2019-07-30 23:20 ` Tian, Kevin 2019-07-31 9:05 ` Auger Eric 2019-07-31 19:25 ` Michael S. Tsirkin 2019-07-31 19:44 ` Auger Eric 2019-07-31 23:23 ` Tian, Kevin 2019-07-30 17:21 ` [Qemu-devel] [PATCH for-4.2 v10 12/15] virtio-iommu: Implement fault reporting Eric Auger 2019-07-30 17:21 ` [Qemu-devel] [PATCH for-4.2 v10 13/15] virtio_iommu: Handle reserved regions in translation process Eric Auger 2019-08-19 12:44 ` Peter Xu 2019-09-01 6:38 ` Michael S. Tsirkin 2019-07-30 17:21 ` [Qemu-devel] [PATCH for-4.2 v10 14/15] virtio-iommu-pci: Add virtio iommu pci support Eric Auger 2019-07-30 19:35 ` Michael S. Tsirkin 2019-08-01 12:15 ` Auger Eric 2019-08-01 13:06 ` Michael S. Tsirkin 2019-08-01 13:49 ` Auger Eric 2019-09-01 6:40 ` Michael S. Tsirkin 2019-09-04 14:19 ` Auger Eric 2019-09-04 21:36 ` Michael S. Tsirkin 2019-07-30 17:21 ` [Qemu-devel] [PATCH for-4.2 v10 15/15] hw/arm/virt: Add the virtio-iommu device tree mappings Eric Auger
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