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Tue, 04 Aug 2020 07:45:00 -0700 (PDT) Received: from zen.linaroharston ([51.148.130.216]) by smtp.gmail.com with ESMTPSA id z11sm29149417wrw.93.2020.08.04.07.44.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 04 Aug 2020 07:44:59 -0700 (PDT) Received: from zen (localhost [127.0.0.1]) by zen.linaroharston (Postfix) with ESMTP id A1F311FF7E; Tue, 4 Aug 2020 15:44:58 +0100 (BST) References: <20200804124417.27102-1-alex.bennee@linaro.org> <20200804124417.27102-4-alex.bennee@linaro.org> User-agent: mu4e 1.5.5; emacs 28.0.50 From: Alex =?utf-8?Q?Benn=C3=A9e?= To: Marc Zyngier Subject: Re: [PATCH v1 3/3] kernel/configs: don't include PCI_QUIRKS in KVM guest configs In-reply-to: Date: Tue, 04 Aug 2020 15:44:58 +0100 Message-ID: <87r1smmpw5.fsf@linaro.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200804_104502_147031_90506BE8 X-CRM114-Status: GOOD ( 15.74 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: christoffer.dall@arm.com, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; 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Tue, 04 Aug 2020 07:45:00 -0700 (PDT) Received: from zen.linaroharston ([51.148.130.216]) by smtp.gmail.com with ESMTPSA id z11sm29149417wrw.93.2020.08.04.07.44.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 04 Aug 2020 07:44:59 -0700 (PDT) Received: from zen (localhost [127.0.0.1]) by zen.linaroharston (Postfix) with ESMTP id A1F311FF7E; Tue, 4 Aug 2020 15:44:58 +0100 (BST) References: <20200804124417.27102-1-alex.bennee@linaro.org> <20200804124417.27102-4-alex.bennee@linaro.org> User-agent: mu4e 1.5.5; emacs 28.0.50 From: Alex =?utf-8?Q?Benn=C3=A9e?= To: Marc Zyngier Cc: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kvmarm@lists.cs.columbia.edu, christoffer.dall@arm.com Subject: Re: [PATCH v1 3/3] kernel/configs: don't include PCI_QUIRKS in KVM guest configs In-reply-to: Date: Tue, 04 Aug 2020 15:44:58 +0100 Message-ID: <87r1smmpw5.fsf@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Marc Zyngier writes: > On 2020-08-04 13:44, Alex Benn=C3=A9e wrote: >> The VIRTIO_PCI support is an idealised PCI bus, we don't need a bunch >> of bloat for real world hardware for a VirtIO guest. > > Who says this guest will only have virtio devices? This is true - although what is the point of kvm_guest.config? We certainly turn on a whole bunch of virt optimised pathways with PARAVIRT and HYPERVISOR_GUEST along with the rest of VirtIO. > Or even, virtio devices without bugs? Given that said device can > come from any VMM, I'm not sure this is the right thing to do. Perhaps this patch is one too far. I don't mind dropping it as long as I can still slim down the kernels I know don't need the extra bloat. > > Thanks, > > M. > >>=20 >> Signed-off-by: Alex Benn=C3=A9e >> --- >> kernel/configs/kvm_guest.config | 1 + >> 1 file changed, 1 insertion(+) >>=20 >> diff --git a/kernel/configs/kvm_guest.config=20 >> b/kernel/configs/kvm_guest.config >> index 208481d91090..672863a2fdf1 100644 >> --- a/kernel/configs/kvm_guest.config >> +++ b/kernel/configs/kvm_guest.config >> @@ -13,6 +13,7 @@ CONFIG_IP_PNP_DHCP=3Dy >> CONFIG_BINFMT_ELF=3Dy >> CONFIG_PCI=3Dy >> CONFIG_PCI_MSI=3Dy >> +CONFIG_PCI_QUIRKS=3Dn >> CONFIG_DEBUG_KERNEL=3Dy >> CONFIG_VIRTUALIZATION=3Dy >> CONFIG_HYPERVISOR_GUEST=3Dy --=20 Alex Benn=C3=A9e