From mboxrd@z Thu Jan 1 00:00:00 1970 From: Laurent Vivier Subject: Re: [kvm-unit-tests PATCH v2 00/14] ppc64: initial drop Date: Thu, 11 Feb 2016 18:47:22 +0100 Message-ID: <56BCC92A.4060108@redhat.com> References: <1454957594-30601-1-git-send-email-drjones@redhat.com> <56BC8E79.7050409@redhat.com> <20160211152951.ydfr5xqpcbkzu27y@hawk.localdomain> <56BCBA50.6080900@redhat.com> <20160211172210.xcwrvz3dfp7kdnzi@hawk.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, thuth@redhat.com, dgibson@redhat.com, david@gibson.dropbear.id.au, agraf@suse.de, pbonzini@redhat.com To: Andrew Jones Return-path: Received: from mx1.redhat.com ([209.132.183.28]:46557 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751528AbcBKRr1 (ORCPT ); Thu, 11 Feb 2016 12:47:27 -0500 In-Reply-To: <20160211172210.xcwrvz3dfp7kdnzi@hawk.localdomain> Sender: kvm-owner@vger.kernel.org List-ID: On 11/02/2016 18:22, Andrew Jones wrote: > On Thu, Feb 11, 2016 at 05:44:00PM +0100, Laurent Vivier wrote: >> >> >> On 11/02/2016 16:29, Andrew Jones wrote: >>> On Thu, Feb 11, 2016 at 02:36:57PM +0100, Laurent Vivier wrote: >> >>>> >>>> - On fedora 23 on PowerMac G5 (ppc64) kvm_pr, it doesn't work at all: >>>> >>>> lib/powerpc/setup.c:60: assert failed >>>> 59 assert(freemem_start >= mem_start && freemem_start < mem_end); >>>> >>>> The values I have are: >>>> freemem_start 434000 mem_start 8000000 mem_end 10000000 >>> >>> That's interesting. I might know what the problem is though. If >>> the spapr machine divides memory up into multiple regions in some >>> kvm use cases, then I'll need to look at all of regions to either a) >>> choose the one I want to use, or b) map them all for use. On that >>> machine, can you run >>> >>> $ /usr/libexec/qemu-kvm -machine pseries,accel=kvm -machine dumpdtb=dtb >>> $ dtc -I dtb -O dts dtb | less >>> >>> and then check if there are multiple memory regions? >> >> No output... fc23 has qemu-2.4.1, so this commit is missing: >> ad440b4 spapr: add dumpdtb support >> >> So I've recompiled master (PPC970MP is not as fast as POWER8...), and: >> >> memory@0000000010000000 { >> ibm,associativity = <0x4 0x0 0x0 0x0 0x0>; >> reg = <0x0 0x10000000 0x0 0x10000000>; >> device_type = "memory"; >> }; >> >> memory@0000000008000000 { >> ibm,associativity = <0x4 0x0 0x0 0x0 0x0>; >> reg = <0x0 0x8000000 0x0 0x8000000>; >> device_type = "memory"; >> }; >> >> memory@0000000000000000 { >> ibm,associativity = <0x4 0x0 0x0 0x0 0x0>; >> reg = <0x0 0x0 0x0 0x8000000>; >> device_type = "memory"; >> }; > > OK, I can fix memory region mapping for v3 pretty easily. > >> >> But master doesn't have the "assert()", it hangs, and in kernel logs: >> >> [ 438.503410] kvmppc_handle_exit_pr: emulation at 700 failed (00000000) >> [ 438.503412] Couldn't emulate instruction 0x00000000 (op 0 xop 0) > > That 700 is what I got when I tried compiling with gcc-5.2, before > changing the toc alignment. I guess that just means "we've gone off > in the weeds." Unfortunately I don't have any idea why this time, > assuming we've got the toc patched kvm-unit-tests. Does everything > run except the rtas-poweroff command? If you comment the call to it > out of exit(), and then just use ^C to quit, does it seem happy? Yes, it seems happy: nothing is displayed in terminal nor in the kernel logs. Laurent