From mboxrd@z Thu Jan 1 00:00:00 1970 From: Alex =?utf-8?Q?Benn=C3=A9e?= Subject: Re: [Qemu-devel] Could not boot a guest vm from kvm mode based on APM X-Gene Host and latest qemu Date: Thu, 17 Sep 2015 08:44:50 +0100 Message-ID: <87r3lxebgt.fsf@linaro.org> References: <55F76064.8010504@hpe.com> <87y4g6mo0l.fsf@linaro.org> <55FA0320.1040701@hpe.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id E9B02423B1 for ; Thu, 17 Sep 2015 03:43:53 -0400 (EDT) Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id mk9vJ5XcJV+d for ; Thu, 17 Sep 2015 03:43:52 -0400 (EDT) Received: from mail-wi0-f179.google.com (mail-wi0-f179.google.com [209.85.212.179]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id AA5BD41451 for ; Thu, 17 Sep 2015 03:43:52 -0400 (EDT) Received: by wiclk2 with SMTP id lk2so11718513wic.0 for ; Thu, 17 Sep 2015 00:44:53 -0700 (PDT) In-reply-to: <55FA0320.1040701@hpe.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu To: liang yan Cc: Marc Zyngier , qemu-devel@nongnu.org, kvmarm@lists.cs.columbia.edu List-Id: kvmarm@lists.cs.columbia.edu CmxpYW5nIHlhbiA8bGlhbmd5QGhwZS5jb20+IHdyaXRlczoKCj4gT24gMDkvMTYvMjAxNSAwODoz NCBBTSwgQWxleCBCZW5uw6llIHdyb3RlOgo+PiBsaWFuZyB5YW4gPGxpYW5neUBocGUuY29tPiB3 cml0ZXM6Cj4+Cj4+PiBIZWxsbywgQWxsLAo+Pj4KPj4+IEkgYW0gdHJ5aW5nIHRvIGVuYWJsZSBr dm0gZm9yIGEgZ3Vlc3Qgdm0gb24gYW4gQVBNIFgtR2VuZSBIb3N0IHdpdGgKPj4+IGxhdGVzdCBx ZW11LCBidXQgY291bGQgbm90IG1ha2UgaXQgd29yay4KPj4+Cj4+PiBUaGUgaG9zdCBpcyBBUE0g WC1HZW5lIDgtY29yZSwgTGludXgga2VybmVsIGlzIDQuMS4wLXJjNy0xLWFybTY0LAo+Pj4KPj4+ IEd1ZXN0IGtlcm5lbCBpcyBsaW51eC0zLjE2cmMzCj4+Pgo+Pj4gUUVNVSBpcyBsYXRlc3QgdmVy 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(envelope-from ) id 1ZcTsL-0005I9-97 for qemu-devel@nongnu.org; Thu, 17 Sep 2015 03:45:07 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZcTsD-000298-UY for qemu-devel@nongnu.org; Thu, 17 Sep 2015 03:45:01 -0400 Received: from mail-wi0-f181.google.com ([209.85.212.181]:38637) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZcTsD-00028m-MU for qemu-devel@nongnu.org; Thu, 17 Sep 2015 03:44:53 -0400 Received: by wiclk2 with SMTP id lk2so15550402wic.1 for ; Thu, 17 Sep 2015 00:44:53 -0700 (PDT) References: <55F76064.8010504@hpe.com> <87y4g6mo0l.fsf@linaro.org> <55FA0320.1040701@hpe.com> From: Alex =?utf-8?Q?Benn=C3=A9e?= In-reply-to: <55FA0320.1040701@hpe.com> Date: Thu, 17 Sep 2015 08:44:50 +0100 Message-ID: <87r3lxebgt.fsf@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Subject: Re: [Qemu-devel] Could not boot a guest vm from kvm mode based on APM X-Gene Host and latest qemu List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: liang yan Cc: Marc Zyngier , qemu-devel@nongnu.org, Christoffer Dall , kvmarm@lists.cs.columbia.edu liang yan writes: > On 09/16/2015 08:34 AM, Alex Bennée wrote: >> liang yan writes: >> >>> Hello, All, >>> >>> I am trying to enable kvm for a guest vm on an APM X-Gene Host with >>> latest qemu, but could not make it work. >>> >>> The host is APM X-Gene 8-core, Linux kernel is 4.1.0-rc7-1-arm64, >>> >>> Guest kernel is linux-3.16rc3 >>> >>> QEMU is latest version >>> >>> Host has these dmesg info >>> [ 2.708259] kvm [1]: GICH base=0x780c0000, GICV base=0x780e0000, IRQ=25 >>> [ 2.708327] kvm [1]: timer IRQ30 >>> [ 2.708335] kvm [1]: Hyp mode initialized successfully >>> >>> Host has dev/kvm. >>> >>> command-line is >>> aarch64-softmmu/qemu-system-aarch64 -machine virt,kernel_irqchip=off >>> -cpu cortex-a57 -machine accel=kvm -nographic -smp 1 -m 2048 -kernel >>> aarch64-linux-3.16rc3-buildroot.img --append "console=ttyAMA0" >> I thought I recognised one of my images ;-) >> >> Why are you running with kernel_irqchip=off? > > > Hello, Alex, > > Thanks for your reply and your pre-boot image. Very helpful. > > The reason I ran with "kernel_irqchip=off" is because it showed the > error "Create kernel irqchip failed: No such device" > are you familiar with it? No but I suspect it is a kernel configuration issue. Are you running a defconfig? > > I did not try kernel 4.3.x yet, have you released on your linaro website > now? That's running directly from Linus' tree so it's pure mainline. > Thanks for your log file, it shows something wrong with the vcpu, I am > gonna check the kvm code from host kernel now. > Will let you know the update. Mark Zyngier pointed out that's a know bug that there are patches in-flight for. > > > Best, > Liang > >> Without it I can boot the image fine on my APM running 4.3.0-rc1-ajb but >> with it I helpfully seg the kernel: > ============================================= >> >> [16035.990518] Bad mode in Synchronous Abort handler detected, code 0x86000006 -- IABT (current EL) > ============================================= >> [16035.997970] CPU: 1 PID: 21328 Comm: qemu-system-aar Not tainted 4.3.0-rc1-ajb #446 >> [16036.004203] Hardware name: APM X-Gene Mustang board (DT) >> [16036.008191] task: ffffffc3ecea8000 ti: ffffffc3d8078000 task.ti: ffffffc3d8078000 >> [16036.014338] PC is at 0x0 >> [16036.015564] LR is at kvm_vgic_map_resources+0x30/0x3c >> [16036.019291] pc : [<0000000000000000>] lr : [] pstate: 00000145 >> [16036.025350] sp : ffffffc3d807bb20 >> [16036.027348] x29: ffffffc3d807bb20 x28: ffffffc3d8078000 >> [16036.031355] x27: ffffffc000642000 x26: 000000000000001d >> [16036.035361] x25: 000000000000011b x24: ffffffc3d80c1000 >> [16036.039368] x23: 0000000000000000 x22: 0000000000000000 >> [16036.043374] x21: ffffffc0fa240000 x20: ffffffc0fa807800 >> [16036.047380] x19: ffffffc0fa807800 x18: 0000007f97af20e0 >> [16036.051387] x17: 0000007f99c44810 x16: ffffffc0001fb030 >> [16036.055394] x15: 0000007f99cc9588 x14: 0000000000922000 >> [16036.059401] x13: 000000000097eb80 x12: 00000000004de0f0 >> [16036.063406] x11: 0000000000000038 x10: 00000000ffffffff >> [16036.067413] x9 : 0000007f97af2480 x8 : 0000000000000050 >> [16036.071419] x7 : ffffffc3ec24c840 x6 : 0000000000000000 >> [16036.075424] x5 : 0000000000000003 x4 : ffffffc3ece72080 >> [16036.079430] x3 : ffffffc3ece72080 x2 : 0000000000000000 >> [16036.083436] x1 : ffffffc000a26260 x0 : ffffffc0fa807800 > ==================================== >> [16036.087628] Internal error: Oops - bad mode: 0 [#1] SMP > ==================================== > >> [16036.091528] Modules linked in: >> [16036.093278] CPU: 1 PID: 21328 Comm: qemu-system-aar Not tainted 4.3.0-rc1-ajb #446 >> [16036.099510] Hardware name: APM X-Gene Mustang board (DT) >> [16036.103497] task: ffffffc3ecea8000 ti: ffffffc3d8078000 task.ti: ffffffc3d8078000 >> [16036.109642] PC is at 0x0 >> [16036.110864] LR is at kvm_vgic_map_resources+0x30/0x3c >> [16036.114590] pc : [<0000000000000000>] lr : [] pstate: 00000145 >> [16036.120649] sp : ffffffc3d807bb20 >> [16036.122648] x29: ffffffc3d807bb20 x28: ffffffc3d8078000 >> [16036.126654] x27: ffffffc000642000 x26: 000000000000001d >> [16036.130659] x25: 000000000000011b x24: ffffffc3d80c1000 >> [16036.134666] x23: 0000000000000000 x22: 0000000000000000 >> [16036.138671] x21: ffffffc0fa240000 x20: ffffffc0fa807800 >> [16036.142678] x19: ffffffc0fa807800 x18: 0000007f97af20e0 >> [16036.146685] x17: 0000007f99c44810 x16: ffffffc0001fb030 >> [16036.150690] x15: 0000007f99cc9588 x14: 0000000000922000 >> [16036.154696] x13: 000000000097eb80 x12: 00000000004de0f0 >> [16036.158701] x11: 0000000000000038 x10: 00000000ffffffff >> [16036.162706] x9 : 0000007f97af2480 x8 : 0000000000000050 >> [16036.166712] x7 : ffffffc3ec24c840 x6 : 0000000000000000 >> [16036.170719] x5 : 0000000000000003 x4 : ffffffc3ece72080 >> [16036.174725] x3 : ffffffc3ece72080 x2 : 0000000000000000 >> [16036.178731] x1 : ffffffc000a26260 x0 : ffffffc0fa807800 >> >>> >>> when using cpu "cortex-a57", got the error "kvm_init_vcpu failed: >>> Invalid argument" >>> when using cpu "host", got the error "Failed to retrieve host CPU features!" >>> >>> By the way, all the command line works well under "tcg" mode. >>> Anyone has a quick idea? Thanks in advance. >>> >>> Best, >>> Liang -- Alex Bennée