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Sun, 7 Jul 2019 15:03:48 +0000 (UTC) Subject: Re: [PATCH v7 6/6] vfio/type1: remove duplicate retrieval of reserved regions To: Shameer Kolothum , alex.williamson@redhat.com, pmorel@linux.vnet.ibm.com References: <20190626151248.11776-1-shameerali.kolothum.thodi@huawei.com> <20190626151248.11776-7-shameerali.kolothum.thodi@huawei.com> From: Auger Eric Message-ID: <7e4fd6c4-ac01-1378-cf8d-35ef490fe7ca@redhat.com> Date: Sun, 7 Jul 2019 17:03:47 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <20190626151248.11776-7-shameerali.kolothum.thodi@huawei.com> Content-Language: en-US X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Sun, 07 Jul 2019 15:03:53 +0000 (UTC) Cc: kevin.tian@intel.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, xuwei5@hisilicon.com, linuxarm@huawei.com, iommu@lists.linux-foundation.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: iommu-bounces@lists.linux-foundation.org Errors-To: iommu-bounces@lists.linux-foundation.org Hi Shameer, On 6/26/19 5:12 PM, Shameer Kolothum wrote: > As we now already have the reserved regions list, just pass that into > vfio_iommu_has_sw_msi() fn. > > Signed-off-by: Shameer Kolothum Reviewed-by: Eric Auger Thanks Eric > --- > drivers/vfio/vfio_iommu_type1.c | 15 ++++++--------- > 1 file changed, 6 insertions(+), 9 deletions(-) > > diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c > index 450081802dcd..43b1e68ebce9 100644 > --- a/drivers/vfio/vfio_iommu_type1.c > +++ b/drivers/vfio/vfio_iommu_type1.c > @@ -1308,15 +1308,13 @@ static struct vfio_group *find_iommu_group(struct vfio_domain *domain, > return NULL; > } > > -static bool vfio_iommu_has_sw_msi(struct iommu_group *group, phys_addr_t *base) > +static bool vfio_iommu_has_sw_msi(struct list_head *group_resv_regions, > + phys_addr_t *base) > { > - struct list_head group_resv_regions; > - struct iommu_resv_region *region, *next; > + struct iommu_resv_region *region; > bool ret = false; > > - INIT_LIST_HEAD(&group_resv_regions); > - iommu_get_group_resv_regions(group, &group_resv_regions); > - list_for_each_entry(region, &group_resv_regions, list) { > + list_for_each_entry(region, group_resv_regions, list) { > /* > * The presence of any 'real' MSI regions should take > * precedence over the software-managed one if the > @@ -1332,8 +1330,7 @@ static bool vfio_iommu_has_sw_msi(struct iommu_group *group, phys_addr_t *base) > ret = true; > } > } > - list_for_each_entry_safe(region, next, &group_resv_regions, list) > - kfree(region); > + > return ret; > } > > @@ -1774,7 +1771,7 @@ static int vfio_iommu_type1_attach_group(void *iommu_data, > if (ret) > goto out_detach; > > - resv_msi = vfio_iommu_has_sw_msi(iommu_group, &resv_msi_base); > + resv_msi = vfio_iommu_has_sw_msi(&group_resv_regions, &resv_msi_base); > > INIT_LIST_HEAD(&domain->group_list); > list_add(&group->next, &domain->group_list); 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