Re: [PATCH] Check CPL for break 0x80001 case. Re: [Xen-ia64-devel] [Q]ltrace and do_ssc
On Wed, 2006-11-29 at 20:07 +0900, Atsushi SAKAI wrote: Hi, All This is a patch which intends for fixing ltrace problem. When I execute a command ltrace ps on dom0, it makes dom0 hung. It comes from break 0x80001 is shared by ltrace(CPL=3) and hpsim(CPL=2). To avoid this problem, I just add check CPL in ia64_break_fault code. Applied, thanks, Alex -- Alex Williamson HP Open Source Linux Org. ___ Xen-ia64-devel mailing list Xen-ia64-devel@lists.xensource.com http://lists.xensource.com/xen-ia64-devel
Re: [PATCH] Check CPL for break 0x80001 case. Re: [Xen-ia64-devel] [Q]ltrace and do_ssc
On Wed, 2006-11-29 at 23:54 +0900, Isaku Yamahata wrote: This patch is incomplete. If the guest kernel issues break 0x80001 or 0x80002 with an unknown SSC command, xen shouldn't fall in infinit loop. It should panic domain (not xen) or return error. Hi Isaku, I assume you objection to this patch is satisfied with the additional do_ssc() patch you submitted, correct? Thanks, Alex On Wed, Nov 29, 2006 at 08:07:36PM +0900, Atsushi SAKAI wrote: Hi, All This is a patch which intends for fixing ltrace problem. When I execute a command ltrace ps on dom0, it makes dom0 hung. It comes from break 0x80001 is shared by ltrace(CPL=3) and hpsim(CPL=2). To avoid this problem, I just add check CPL in ia64_break_fault code. References Yamahata mail http://lists.xensource.com/archives/html/xen-ia64-devel/2006-11/msg00319.html Alex mail http://lists.xensource.com/archives/html/xen-ia64-devel/2006-11/msg00318.html -- Alex Williamson HP Open Source Linux Org. ___ Xen-ia64-devel mailing list Xen-ia64-devel@lists.xensource.com http://lists.xensource.com/xen-ia64-devel
Re: [PATCH] Check CPL for break 0x80001 case. Re: [Xen-ia64-devel] [Q]ltrace and do_ssc
On Thu, Nov 30, 2006 at 04:49:48PM -0700, Alex Williamson wrote: I assume you objection to this patch is satisfied with the additional do_ssc() patch you submitted, correct? Thanks, Right. Please apply this patch too. -- yamahata ___ Xen-ia64-devel mailing list Xen-ia64-devel@lists.xensource.com http://lists.xensource.com/xen-ia64-devel
Re: [PATCH] Check CPL for break 0x80001 case. Re: [Xen-ia64-devel] [Q]ltrace and do_ssc
This patch is incomplete. If the guest kernel issues break 0x80001 or 0x80002 with an unknown SSC command, xen shouldn't fall in infinit loop. It should panic domain (not xen) or return error. On Wed, Nov 29, 2006 at 08:07:36PM +0900, Atsushi SAKAI wrote: Hi, All This is a patch which intends for fixing ltrace problem. When I execute a command ltrace ps on dom0, it makes dom0 hung. It comes from break 0x80001 is shared by ltrace(CPL=3) and hpsim(CPL=2). To avoid this problem, I just add check CPL in ia64_break_fault code. References Yamahata mail http://lists.xensource.com/archives/html/xen-ia64-devel/2006-11/msg00319.html Alex mail http://lists.xensource.com/archives/html/xen-ia64-devel/2006-11/msg00318.html Signed-off-by: Atsushi SAKAI [EMAIL PROTECTED] Thanks Atsushi SAKAI Hi, Alex Thank you for your comments With this following fixes it seems running. Thanks Atsushi SAKAI On Wed, 2006-11-29 at 11:27 +0900, Atsushi SAKAI wrote: Hi, Alex I am trying ltrace ps on IA64. It makes dom0 hung. From the serial console messages, (XEN) ia64_handle_break: bad ssc code 4001c480, iip=0x40002140, b0=0x40002380... spinning It seems come from following system call. [EMAIL PROTECTED]/arch/ia64/hp/sim/hpsim.S Do you have any idea to solve this problem? I'd guess you happened to hit a break value that overlaps with the ones chosen for trapping into ski. You might try getting rid of the first test in handle_break() that calls do_ssc(). Alex -- Alex Williamson HP Open Source Linux Org. ___ Xen-ia64-devel mailing list Xen-ia64-devel@lists.xensource.com http://lists.xensource.com/xen-ia64-devel ___ Xen-ia64-devel mailing list Xen-ia64-devel@lists.xensource.com http://lists.xensource.com/xen-ia64-devel -- yamahata ___ Xen-ia64-devel mailing list Xen-ia64-devel@lists.xensource.com http://lists.xensource.com/xen-ia64-devel
Re: [PATCH] Check CPL for break 0x80001 case. Re: [Xen-ia64-devel] [Q]ltrace and do_ssc
Hi, Isaku Thank you for your comments. I am just caring ltrace problem. I just check dom0 boot and ltrace command. If any suggestions, please fix it. (Since I have no idea on this.) Thanks Atsushi SAKAI This patch is incomplete. If the guest kernel issues break 0x80001 or 0x80002 with an unknown SSC command, xen shouldn't fall in infinit loop. It should panic domain (not xen) or return error. On Wed, Nov 29, 2006 at 08:07:36PM +0900, Atsushi SAKAI wrote: Hi, All This is a patch which intends for fixing ltrace problem. When I execute a command ltrace ps on dom0, it makes dom0 hung. It comes from break 0x80001 is shared by ltrace(CPL=3) and hpsim(CPL=2). To avoid this problem, I just add check CPL in ia64_break_fault code. References Yamahata mail http://lists.xensource.com/archives/html/xen-ia64-devel/2006-11/msg00319.html Alex mail http://lists.xensource.com/archives/html/xen-ia64-devel/2006-11/msg00318.html Signed-off-by: Atsushi SAKAI [EMAIL PROTECTED] Thanks Atsushi SAKAI Hi, Alex Thank you for your comments With this following fixes it seems running. Thanks Atsushi SAKAI On Wed, 2006-11-29 at 11:27 +0900, Atsushi SAKAI wrote: Hi, Alex I am trying ltrace ps on IA64. It makes dom0 hung. From the serial console messages, (XEN) ia64_handle_break: bad ssc code 4001c480, iip=0x40002140, b0=0x40002380... spinning It seems come from following system call. [EMAIL PROTECTED]/arch/ia64/hp/sim/hpsim.S Do you have any idea to solve this problem? I'd guess you happened to hit a break value that overlaps with the ones chosen for trapping into ski. You might try getting rid of the first test in handle_break() that calls do_ssc(). Alex -- Alex Williamson HP Open Source Linux Org. ___ Xen-ia64-devel mailing list Xen-ia64-devel@lists.xensource.com http://lists.xensource.com/xen-ia64-devel ___ Xen-ia64-devel mailing list Xen-ia64-devel@lists.xensource.com http://lists.xensource.com/xen-ia64-devel -- yamahata ___ Xen-ia64-devel mailing list Xen-ia64-devel@lists.xensource.com http://lists.xensource.com/xen-ia64-devel
[Xen-ia64-devel] [Q]ltrace and do_ssc
Hi, Alex I am trying ltrace ps on IA64. It makes dom0 hung. From the serial console messages, (XEN) ia64_handle_break: bad ssc code 4001c480, iip=0x40002140, b0=0x40002380... spinning It seems come from following system call. [EMAIL PROTECTED]/arch/ia64/hp/sim/hpsim.S Do you have any idea to solve this problem? Thanks Atsushi SAKAI ___ Xen-ia64-devel mailing list Xen-ia64-devel@lists.xensource.com http://lists.xensource.com/xen-ia64-devel
Re: [Xen-ia64-devel] [Q]ltrace and do_ssc
Hi, This issue is strange. Why do codes of hpsim is used? Best Regards, Akio Takebe Hi, Alex I am trying ltrace ps on IA64. It makes dom0 hung. From the serial console messages, (XEN) ia64_handle_break: bad ssc code 4001c480, iip= 0x40002140, b0=0x40002380... spinning It seems come from following system call. [EMAIL PROTECTED]/arch/ia64/hp/sim/hpsim.S Do you have any idea to solve this problem? Thanks Atsushi SAKAI ___ Xen-ia64-devel mailing list Xen-ia64-devel@lists.xensource.com http://lists.xensource.com/xen-ia64-devel ___ Xen-ia64-devel mailing list Xen-ia64-devel@lists.xensource.com http://lists.xensource.com/xen-ia64-devel
Re: [Xen-ia64-devel] [Q]ltrace and do_ssc
On Wed, 2006-11-29 at 11:27 +0900, Atsushi SAKAI wrote: Hi, Alex I am trying ltrace ps on IA64. It makes dom0 hung. From the serial console messages, (XEN) ia64_handle_break: bad ssc code 4001c480, iip=0x40002140, b0=0x40002380... spinning It seems come from following system call. [EMAIL PROTECTED]/arch/ia64/hp/sim/hpsim.S Do you have any idea to solve this problem? I'd guess you happened to hit a break value that overlaps with the ones chosen for trapping into ski. You might try getting rid of the first test in handle_break() that calls do_ssc(). Alex -- Alex Williamson HP Open Source Linux Org. ___ Xen-ia64-devel mailing list Xen-ia64-devel@lists.xensource.com http://lists.xensource.com/xen-ia64-devel
Re: [Xen-ia64-devel] [Q]ltrace and do_ssc
What immidate for break instruction does ltrace use? Anyway, xen/ia64 should check privilege level before calling do_ssc(). On Wed, Nov 29, 2006 at 11:27:42AM +0900, Atsushi SAKAI wrote: Hi, Alex I am trying ltrace ps on IA64. It makes dom0 hung. From the serial console messages, (XEN) ia64_handle_break: bad ssc code 4001c480, iip=0x40002140, b0=0x40002380... spinning It seems come from following system call. [EMAIL PROTECTED]/arch/ia64/hp/sim/hpsim.S Do you have any idea to solve this problem? Thanks Atsushi SAKAI ___ Xen-ia64-devel mailing list Xen-ia64-devel@lists.xensource.com http://lists.xensource.com/xen-ia64-devel -- yamahata ___ Xen-ia64-devel mailing list Xen-ia64-devel@lists.xensource.com http://lists.xensource.com/xen-ia64-devel
