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spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:59232 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jiiKL-00065r-5v for qemu-devel@archiver.kernel.org; Tue, 09 Jun 2020 13:46:21 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:53906) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jihyN-0000y4-K6; Tue, 09 Jun 2020 13:23:39 -0400 Received: from mout.kundenserver.de ([212.227.126.133]:42999) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jihyM-0002b2-Ir; Tue, 09 Jun 2020 13:23:39 -0400 Received: from [192.168.100.1] ([82.252.135.106]) by mrelayeu.kundenserver.de (mreue010 [213.165.67.103]) with ESMTPSA (Nemesis) id 1MEFjJ-1jqA64230f-00AGpo; Tue, 09 Jun 2020 19:23:33 +0200 Subject: Re: [PATCH v2] hw/vfio/common: Trace in which mode an IOMMU is opened To: =?UTF-8?Q?Philippe_Mathieu-Daud=c3=a9?= , qemu-devel@nongnu.org References: <20200527155555.6833-1-philmd@redhat.com> From: Laurent Vivier Autocrypt: addr=laurent@vivier.eu; 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envelope-from=laurent@vivier.eu; helo=mout.kundenserver.de X-detected-operating-system: by eggs.gnu.org: First seen = 2020/06/09 12:51:12 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001 autolearn=_AUTOLEARN 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: qemu-trivial@nongnu.org, Eric Auger , Alex Williamson , Cornelia Huck , Peter Xu Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Le 27/05/2020 à 17:55, Philippe Mathieu-Daudé a écrit : > One might want to check which IOMMU version the host kernel > provide. Add a trace event to see in which mode we opened > our container. > > Reviewed-by: Cornelia Huck > Signed-off-by: Philippe Mathieu-Daudé > --- > v2: Only display string description (Eric) > > Supersedes: <20200526173542.28710-1-philmd@redhat.com> > --- > hw/vfio/common.c | 19 ++++++++++++++----- > hw/vfio/trace-events | 1 + > 2 files changed, 15 insertions(+), 5 deletions(-) > > diff --git a/hw/vfio/common.c b/hw/vfio/common.c > index 0b3593b3c0..f24450472e 100644 > --- a/hw/vfio/common.c > +++ b/hw/vfio/common.c > @@ -1157,15 +1157,24 @@ static void vfio_put_address_space(VFIOAddressSpace *space) > static int vfio_get_iommu_type(VFIOContainer *container, > Error **errp) > { > - int iommu_types[] = { VFIO_TYPE1v2_IOMMU, VFIO_TYPE1_IOMMU, > - VFIO_SPAPR_TCE_v2_IOMMU, VFIO_SPAPR_TCE_IOMMU }; > + static const struct { > + int type; > + const char *name; > + } iommu[] = { > + {VFIO_TYPE1v2_IOMMU, "Type1 (v2)"}, > + {VFIO_TYPE1_IOMMU, "Type1 (v1)"}, > + {VFIO_SPAPR_TCE_v2_IOMMU, "sPAPR TCE (v2)"}, > + {VFIO_SPAPR_TCE_IOMMU, "sPAPR TCE (v1)"} > + }; > int i; > > - for (i = 0; i < ARRAY_SIZE(iommu_types); i++) { > - if (ioctl(container->fd, VFIO_CHECK_EXTENSION, iommu_types[i])) { > - return iommu_types[i]; > + for (i = 0; i < ARRAY_SIZE(iommu); i++) { > + if (ioctl(container->fd, VFIO_CHECK_EXTENSION, iommu[i].type)) { > + trace_vfio_get_iommu_type(iommu[i].name); > + return iommu[i].type; > } > } > + trace_vfio_get_iommu_type("Not available or not supported"); > error_setg(errp, "No available IOMMU models"); > return -EINVAL; > } > diff --git a/hw/vfio/trace-events b/hw/vfio/trace-events > index b1ef55a33f..d3f1e48618 100644 > --- a/hw/vfio/trace-events > +++ b/hw/vfio/trace-events > @@ -115,6 +115,7 @@ vfio_region_sparse_mmap_header(const char *name, int index, int nr_areas) "Devic > vfio_region_sparse_mmap_entry(int i, unsigned long start, unsigned long end) "sparse entry %d [0x%lx - 0x%lx]" > vfio_get_dev_region(const char *name, int index, uint32_t type, uint32_t subtype) "%s index %d, %08x/%0x8" > vfio_dma_unmap_overflow_workaround(void) "" > +vfio_get_iommu_type(const char *type) "IOMMU type: %s" > > # platform.c > vfio_platform_base_device_init(char *name, int groupid) "%s belongs to group #%d" > Applied to my trivial-patches branch. Thanks, Laurent