Re: [linux-sunxi] [RFC PATCH 8/8] sunxi: enable PSCI for A83T SoC
Hello! First of all I would like to thank you all for your amazing contribution! More I dive into understanding the kernel, more I appreciate your work and more I learn. As Marc Zyngier said: "Now, if someone could try and run guests on this turd and report whether this works correctly or not, that'd be an interesting data point. Because in the absence of a TEE running on the secure side, virtualization is basically the only thing you gain from running on the non-secure side. " I am that "someone" who wants to run Xen on a A83T chipset. I managed to build the latest kernel 4.15, the Xen hypervisor and got stuck on compiling the u-boot kernel with virtualization, HYP enabled and boot non secure: bool "sun8i (Allwinner A83T)" select CPU_V7 +select CPU_V7_HAS_NONSEC +select CPU_V7_HAS_VIRT +select ARCH_SUPPORT_PSCI select SUNXI_GEN_SUN6I select SUPPORT_SPL +select ARMV7_BOOT_SEC_DEFAULT if OLD_SUNXI_KERNEL_COMPAT Not knowing if A83T supports virtualization and the above mentioned features, I tried to enable these in Kconfig and build the latest u-boot kernel. Unfortunatelly even if it compiled, I have a strange loop at boot...I think it is related to the CPU allocation... As you can see I am a noob in terms of kernel hacking, but I want, with your help, to achieve this implementation of Xen. In this regard I would appreciate your help and guidance. Can you provide the files/patches and/or a tutorial on how I could accomplish my goal? Many thanks! Alex -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [linux-sunxi] [RFC PATCH 8/8] sunxi: enable PSCI for A83T SoC
This is the loop I was talking about: U-Boot 2018.03-rc1-00078-gb215307-dirty (Feb 05 2018 - 12:50:50 +) Loading Environment from FAT... Unable to use mmc 1:0... Failed (-5) Loading Environment from MMC... *** Warning - bad CRC, using default environment Failed (-5) In:serial Out: serial Err: serial Net: No ethernet found. starting USB... USB0: data abort pc : [] lr : [] reloc pc : [<4a01ba3a>]lr : [<4a01ba1d>] sp : bbf4ec40 ip : bbf584ec fp : 0002 r10: bffb577c r9 : bbf50ee8 r8 : r7 : r6 : bbf5773c r5 : bffb39a4 r4 : bbf57550 r3 : r2 : 01c4 r1 : 3f8f r0 : Flags: nZCv IRQs off FIQs off Mode SVC_32 Resetting CPU ... Any hints? Thank you! -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [linux-sunxi] [RFC PATCH 8/8] sunxi: enable PSCI for A83T SoC
Thank you all for your help! I really appreciate your feedback! Following your advice I booted XEN ... Yeeeyyy BUT got stuck here: Xen 4.11-unstable (XEN) Xen version 4.11-unstable (@) (arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705) debug=y Fri Feb 2 16:48:36 UTC 2018 (XEN) Latest ChangeSet: Fri Nov 3 16:43:02 2017 + git:4c7e478 (XEN) Processor: 410fc075: "ARM Limited", variant: 0x0, part 0xc07, rev 0x5 (XEN) 32-bit Execution: (XEN) Processor Features: 1131:00011011 (XEN) Instruction Sets: AArch32 A32 Thumb Thumb-2 ThumbEE Jazelle (XEN) Extensions: GenericTimer Security (XEN) Debug Features: 02010555 (XEN) Auxiliary Features: (XEN) Memory Model Features: 10101105 4000 0124 02102211 (XEN) ISA Features: 02101110 13112111 21232041 2131 10011142 (XEN) Using PSCI-0.1 for SMP bringup (XEN) SMP: Allowing 8 CPUs (XEN) Generic Timer IRQ: phys=30 hyp=26 virt=27 Freq: 24000 KHz (XEN) GICv2 initialization: (XEN) gic_dist_addr=01c81000 (XEN) gic_cpu_addr=01c82000 (XEN) gic_hyp_addr=01c84000 (XEN) gic_vcpu_addr=01c86000 (XEN) gic_maintenance_irq=25 (XEN) GICv2: 224 lines, 8 cpus, secure (IID 0200143b). (XEN) Using scheduler: SMP Credit Scheduler (credit) (XEN) Allocated console ring of 64 KiB. (XEN) VFP implementer 0x41 architecture 2 part 0x30 variant 0x7 rev 0x5 (XEN) Bringing up CPU1 I am trying to recompile Xen and see if I can get further... I will keep you updated with my progress... :) Please let me know your opinion on this! Is it feasible? Thank you guys! Alex -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [linux-sunxi] [RFC PATCH 8/8] sunxi: enable PSCI for A83T SoC
Hi Guys, I think I reached a dead end... Can you please tell me why does it hang on "(XEN) Bringing up CPU1"? I compiled many xen version, but my feeling is that in the u-boot is sth. that makes Xen hang... Any suggestions? Thank you in advance! = Xen 4.11-unstable (XEN) Xen version 4.11-unstable (@) (arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705) debug=y Fri Feb 2 16:48:36 UTC 2018 (XEN) Latest ChangeSet: Fri Nov 3 16:43:02 2017 + git:4c7e478 (XEN) Processor: 410fc075: "ARM Limited", variant: 0x0, part 0xc07, rev 0x5 (XEN) 32-bit Execution: (XEN) Processor Features: 1131:00011011 (XEN) Instruction Sets: AArch32 A32 Thumb Thumb-2 ThumbEE Jazelle (XEN) Extensions: GenericTimer Security (XEN) Debug Features: 02010555 (XEN) Auxiliary Features: (XEN) Memory Model Features: 10101105 4000 0124 02102211 (XEN) ISA Features: 02101110 13112111 21232041 2131 10011142 (XEN) Using PSCI-0.1 for SMP bringup (XEN) SMP: Allowing 8 CPUs (XEN) Generic Timer IRQ: phys=30 hyp=26 virt=27 Freq: 24000 KHz (XEN) GICv2 initialization: (XEN) gic_dist_addr=01c81000 (XEN) gic_cpu_addr=01c82000 (XEN) gic_hyp_addr=01c84000 (XEN) gic_vcpu_addr=01c86000 (XEN) gic_maintenance_irq=25 (XEN) GICv2: 224 lines, 8 cpus, secure (IID 0200143b). (XEN) Using scheduler: SMP Credit Scheduler (credit) (XEN) Allocated console ring of 64 KiB. (XEN) VFP implementer 0x41 architecture 2 part 0x30 variant 0x7 rev 0x5 (XEN) Bringing up CPU1- HERE IT HANGS - -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [linux-sunxi] [RFC PATCH 8/8] sunxi: enable PSCI for A83T SoC
Hi Icenowy, Thank you for your reply! I worked much and got this close, so I really want to make this thing work :) Do you have any suggestions/patches/directions? This "ugly hack" is there somewhere? :) I think the issue resides on the "switching" to the next cpu... Thank you in advance! Alex On Wednesday, February 7, 2018 at 8:04:41 PM UTC+2, Icenowy Zheng wrote: > > > > 于 2018年2月8日 GMT+08:00 上午2:02:39, "Mr. Fülöp" > 写到: > >Hi Guys, > > > >I think I reached a dead end... > >Can you please tell me why does it hang on "(XEN) Bringing up CPU1"? > >I compiled many xen version, but my feeling is that in the u-boot is > >sth. that makes Xen hang... > > > >Any suggestions? > > > >Thank you in advance! > > > >= > > > > Xen 4.11-unstable > >(XEN) Xen version 4.11-unstable (@) (arm-linux-gnueabi-gcc (Debian > >6.1.1-9) 6.1.1 20160705) debug=y Fri Feb 2 16:48:36 UTC 2018 > >(XEN) Latest ChangeSet: Fri Nov 3 16:43:02 2017 + git:4c7e478 > >(XEN) Processor: 410fc075: "ARM Limited", variant: 0x0, part 0xc07, rev > >0x5 > >(XEN) 32-bit Execution: > >(XEN) Processor Features: 1131:00011011 > >(XEN) Instruction Sets: AArch32 A32 Thumb Thumb-2 ThumbEE Jazelle > >(XEN) Extensions: GenericTimer Security > >(XEN) Debug Features: 02010555 > >(XEN) Auxiliary Features: > >(XEN) Memory Model Features: 10101105 4000 0124 02102211 > >(XEN) ISA Features: 02101110 13112111 21232041 2131 10011142 > > > >(XEN) Using PSCI-0.1 for SMP bringup > >(XEN) SMP: Allowing 8 CPUs > >(XEN) Generic Timer IRQ: phys=30 hyp=26 virt=27 Freq: 24000 KHz > >(XEN) GICv2 initialization: > >(XEN) gic_dist_addr=01c81000 > >(XEN) gic_cpu_addr=01c82000 > >(XEN) gic_hyp_addr=01c84000 > >(XEN) gic_vcpu_addr=01c86000 > >(XEN) gic_maintenance_irq=25 > >(XEN) GICv2: 224 lines, 8 cpus, secure (IID 0200143b). > >(XEN) Using scheduler: SMP Credit Scheduler (credit) > >(XEN) Allocated console ring of 64 KiB. > >(XEN) VFP implementer 0x41 architecture 2 part 0x30 variant 0x7 rev 0x5 > >(XEN) Bringing up CPU1- HERE IT HANGS - > > I think you just met the bug we mentioned in this thread. > With this patchset applied a Linux kernel will also hang > here without ugly hack. > > -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [linux-sunxi] [RFC PATCH 8/8] sunxi: enable PSCI for A83T SoC
Thanks! I will try it out and let you know the result! -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
