From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg Roedel Subject: Re: [PATCH v2 1/3] iommu/virtio: Add topology description to virtio-iommu config space Date: Wed, 4 Mar 2020 22:50:02 +0100 Message-ID: <20200304215001.GD3315@8bytes.org> References: <20200228172537.377327-1-jean-philippe@linaro.org> <20200228172537.377327-2-jean-philippe@linaro.org> <20200302161611.GD7829@8bytes.org> <9004f814-2f7c-9024-3465-6f9661b97b7a@redhat.com> <20200303130155.GA13185@8bytes.org> <20200303084753-mutt-send-email-mst@kernel.org> <20200303155318.GA3954@8bytes.org> <20200303105523-mutt-send-email-mst@kernel.org> <20200304133707.GB4177@8bytes.org> <20200304142838-mutt-send-email-mst@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20200304142838-mutt-send-email-mst@kernel.org> Sender: linux-pci-owner@vger.kernel.org To: "Michael S. Tsirkin" Cc: Auger Eric , Jean-Philippe Brucker , iommu@lists.linux-foundation.org, virtualization@lists.linux-foundation.org, linux-pci@vger.kernel.org, bhelgaas@google.com, jasowang@redhat.com, kevin.tian@intel.com, sebastien.boeuf@intel.com, jacob.jun.pan@intel.com, robin.murphy@arm.com List-Id: virtualization@lists.linuxfoundation.org On Wed, Mar 04, 2020 at 02:34:33PM -0500, Michael S. Tsirkin wrote: > All these extra levels of indirection is one of the reasons > hypervisors such as kata try to avoid ACPI. Platforms that don't use ACPI need another hardware detection mechanism, which can also be supported. But the first step here is to enable the general case, and for x86 platforms this means ACPI. Regards, Joerg