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[10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 67E2AC0587F9; Thu, 13 Dec 2018 13:13:30 +0000 (UTC) Received: from [10.36.112.30] (ovpn-112-30.ams2.redhat.com [10.36.112.30]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 98CE15D756; Thu, 13 Dec 2018 13:13:23 +0000 (UTC) Subject: Re: [PATCH v8 0/7] KVM: x86: Allow Qemu/KVM to use PVH entry point To: Maran Wilson , x86@kernel.org, xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, jgross@suse.com Cc: boris.ostrovsky@oracle.com, bp@suse.de, dave.hansen@linux.intel.com, davem@davemloft.net, gregkh@linuxfoundation.org, hpa@zytor.com, jpoimboe@redhat.com, kirill.shutemov@linux.intel.com, luto@kernel.org, mchehab@kernel.org, mingo@redhat.com, rdunlap@infradead.org, tglx@linutronix.de, thomas.lendacky@amd.com, hch@infradead.org, roger.pau@citrix.com, rkrcmar@redhat.com References: <1544076152-21637-1-git-send-email-maran.wilson@oracle.com> From: Paolo Bonzini Openpgp: preference=signencrypt Autocrypt: addr=pbonzini@redhat.com; prefer-encrypt=mutual; keydata= mQHhBFRCcBIBDqDGsz4K0zZun3jh+U6Z9wNGLKQ0kSFyjN38gMqU1SfP+TUNQepFHb/Gc0E2 CxXPkIBTvYY+ZPkoTh5xF9oS1jqI8iRLzouzF8yXs3QjQIZ2SfuCxSVwlV65jotcjD2FTN04 hVopm9llFijNZpVIOGUTqzM4U55sdsCcZUluWM6x4HSOdw5F5Utxfp1wOjD/v92Lrax0hjiX DResHSt48q+8FrZzY+AUbkUS+Jm34qjswdrgsC5uxeVcLkBgWLmov2kMaMROT0YmFY6A3m1S P/kXmHDXxhe23gKb3dgwxUTpENDBGcfEzrzilWueOeUWiOcWuFOed/C3SyijBx3Av/lbCsHU Vx6pMycNTdzU1BuAroB+Y3mNEuW56Yd44jlInzG2UOwt9XjjdKkJZ1g0P9dwptwLEgTEd3Fo UdhAQyRXGYO8oROiuh+RZ1lXp6AQ4ZjoyH8WLfTLf5g1EKCTc4C1sy1vQSdzIRu3rBIjAvnC tGZADei1IExLqB3uzXKzZ1BZ+Z8hnt2og9hb7H0y8diYfEk2w3R7wEr+Ehk5NQsT2MPI2QBd wEv1/Aj1DgUHZAHzG1QN9S8wNWQ6K9DqHZTBnI1hUlkp22zCSHK/6FwUCuYp1zcAEQEAAbQj UGFvbG8gQm9uemluaSA8cGJvbnppbmlAcmVkaGF0LmNvbT6JAg0EEwECACMFAlRCcBICGwMH CwkIBwMCAQYVCAIJCgsEFgIDAQIeAQIXgAAKCRB+FRAMzTZpsbceDp9IIN6BIA0Ol7MoB15E 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Y+W1eTIhMD3aeAKY90drozWEyHhENf4l/V+Ja5vOnW+gCDQkGt2Y1lJAPPSIqZKvHzGShdh8 DduC0U3xYkfbGAUvbxeepjgzp0uEnBXfPTy09JGpgWbg0w91GyfT/ujKaGd4vxG2Ei+MMNDm S1SMx7wu0evvQ5kT9NPzyq8R2GIhVSiAd2jioGuTjX6AZCFv3ToO53DliFMkVTecLptsXaes uUHgL9dKIfvpm+rNXRn9wAwGjk0X/A== Message-ID: <64b4fc44-d3f5-ed4e-ee4c-38e78313d979@redhat.com> Date: Thu, 13 Dec 2018 14:13:21 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit 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 [10.5.110.32]); Thu, 13 Dec 2018 13:13:30 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/12/18 19:09, Maran Wilson wrote: > On 12/6/2018 1:21 PM, Paolo Bonzini wrote: >> On 06/12/18 07:02, Maran Wilson wrote: >>> For certain applications it is desirable to rapidly boot a KVM virtual >>> machine. In cases where legacy hardware and software support within the >>> guest is not needed, Qemu should be able to boot directly into the >>> uncompressed Linux kernel binary without the need to run firmware. >>> >>> There already exists an ABI to allow this for Xen PVH guests and the ABI >>> is supported by Linux and FreeBSD: >>> >>>     https://xenbits.xen.org/docs/unstable/misc/pvh.html >>> >>> This patch series would enable Qemu to use that same entry point for >>> booting KVM guests. >> Thanks!  I should be able to post a Tested-by next Monday.  Boris, are >> you going to pick it up for 4.21? > > Hi Paolo, > > Are you still planning on running some testing of your own for these > patches? Should Boris wait to hear from you before moving forward? He can go ahead with v9, I was just curious about it. Paolo