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[159.2.239.150]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-91b54e80353sm71122656d6.1.2026.10.11.06.25.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 11 Oct 2026 06:25:58 -0700 (PDT) Received: from jgg by wakko with local (Exim 4.97) (envelope-from ) id 1xFtYs-00000003FEK-1U1k; Sun, 11 Oct 2026 10:25:58 -0300 Date: Sun, 11 Oct 2026 10:25:58 -0300 From: Jason Gunthorpe To: Jose Ignacio Tornos Martinez Cc: alex@shazbot.org, bhelgaas@google.com, jjohnson@kernel.org, johannes@sipsolutions.net, mani@kernel.org, yishaih@nvidia.com, skolothumtho@nvidia.com, kevin.tian@intel.com, linux-pci@vger.kernel.org, kvm@vger.kernel.org, linux-wireless@vger.kernel.org, ath11k@lists.infradead.org, ath12k@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH 0/7] Enable Qualcomm WiFi PCIe passthrough to VMs Message-ID: <20261011132558.GD14213@ziepe.ca> References: <20260930140833.576941-1-jtornosm@redhat.com> <20261011075425.516927-1-jtornosm@redhat.com> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20261011075425.516927-1-jtornosm@redhat.com> On Sun, Oct 11, 2026 at 09:54:25AM +0200, Jose Ignacio Tornos Martinez wrote: > Hi, > > Since no further feedback was received after the last discussion, > I proceeded with v2 addressing review findings (Sashiko): > https://lore.kernel.org/all/20261011074514.515894-1-jtornosm@redhat.com/ > > I remain open to suggestions and happy to iterate further if needed > to get this acceptable. IMHO this is not OK, building a new crazy hypervisor interface that only works with the broken driver design we have today is not OK. This is not some "quirk", it is a permanent new ABI between VMM and kernel that has real compatibility implications. Go tell an AI to convert it to platform_device_msi_init_and_alloc_irqs() and then solve for that so at least we are not getting trapped into a completely broken ABI by all the hacks here. The whole "MSI Caching" concept is fully wrong to be an ABI to a VM. Jason