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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] PAT-related crash booting Linux 4.4 + Xen 4.5 on VMware ESXi
On Fri, May 20, 2016 at 04:58:09PM -0700, Ed Swierk wrote: > I've encountered two problems booting a Linux 4.4 dom0 on recent > stable xen 4.5 on VMware ESXi 5.5.0. > > One has the same "ata_piix: probe of 0000:00:07.1 failed with error > -22" symptom discussed some time ago, and prevents the kernel from > seeing any of the virtual IDE drives exposed by VMware. This problem > is fixed by applying Stefano's patch > (https://lkml.org/lkml/2016/4/20/345). > > Another problem occurs very early during boot: > > (XEN) Xen version 4.5.4-pre ( 4.5.4~pre-1skyport2) > (eswierk@xxxxxxxxxxxxxxxxxx) (gcc (Debian 5.2.1-19.1skyport1) 5.2.1 20150930) > debug=n Thu May 19 12:06:20 PDT 2016 > (XEN) Bootloader: SYSLINUX 4.05 20140113 > (XEN) Command line: xen console=com1,vga com1=115200 no-bootscrub > dom0_mem=2048M,max:2048M ignore_loglevel > (XEN) Video information: > (XEN) VGA is text mode 80x25, font 8x16 > (XEN) Disc information: > (XEN) Found 1 MBR signatures > (XEN) Found 1 EDD information structures > (XEN) Xen-e820 RAM map: > (XEN) 0000000000000000 - 000000000009f800 (usable) > (XEN) 000000000009f800 - 00000000000a0000 (reserved) > (XEN) 00000000000dc000 - 0000000000100000 (reserved) > (XEN) 0000000000100000 - 00000000bfef0000 (usable) > (XEN) 00000000bfef0000 - 00000000bfeff000 (ACPI data) > (XEN) 00000000bfeff000 - 00000000bff00000 (ACPI NVS) > (XEN) 00000000bff00000 - 00000000c0000000 (usable) > (XEN) 00000000f0000000 - 00000000f8000000 (reserved) > (XEN) 00000000fec00000 - 00000000fec10000 (reserved) > (XEN) 00000000fee00000 - 00000000fee01000 (reserved) > (XEN) 00000000fffe0000 - 0000000100000000 (reserved) > (XEN) 0000000100000000 - 00000001c0000000 (usable) > (XEN) ACPI: RSDP 000F6B80, 0024 (r2 PTLTD ) > (XEN) ACPI: XSDT BFEF0F70, 0054 (r1 INTEL 440BX 6040000 VMW 1324272) > (XEN) ACPI: FACP BFEFEE73, 00F4 (r4 INTEL 440BX 6040000 PTL F4240) > (XEN) ACPI: DSDT BFEF1252, DC21 (r1 PTLTD Custom 6040000 MSFT 3000001) > (XEN) ACPI: FACS BFEFFFC0, 0040 > (XEN) ACPI: BOOT BFEF122A, 0028 (r1 PTLTD $SBFTBL$ 6040000 LTP 1) > (XEN) ACPI: APIC BFEF1194, 0096 (r1 PTLTD APIC 6040000 LTP 0) > (XEN) ACPI: MCFG BFEF1158, 003C (r1 PTLTD $PCITBL$ 6040000 LTP 1) > (XEN) ACPI: SRAT BFEF1028, 0130 (r2 VMWARE MEMPLUG 6040000 VMW 1) > (XEN) ACPI: WAET BFEF1000, 0028 (r1 VMWARE VMW WAET 6040000 VMW 1) > (XEN) System RAM: 6143MB (6291004kB) > (XEN) Domain heap initialised > (XEN) Processor #0 7:15 APIC version 21 > (XEN) Processor #2 7:15 APIC version 21 > (XEN) Processor #4 7:15 APIC version 21 > (XEN) Processor #6 7:15 APIC version 21 > (XEN) Processor #8 7:15 APIC version 21 > (XEN) Processor #10 7:15 APIC version 21 > (XEN) IOAPIC[0]: apic_id 1, version 17, address 0xfec00000, GSI 0-23 > (XEN) Enabling APIC mode: Flat. Using 1 I/O APICs > (XEN) Not enabling x2APIC: depends on iommu_supports_eim. > (XEN) Using scheduler: SMP Credit Scheduler (credit) > (XEN) Detected 2299.474 MHz processor. > (XEN) Initing memory sharing. > (XEN) xstate_init: using cntxt_size: 0x340 and states: 0x7 > (XEN) I/O virtualisation disabled > (XEN) ENABLING IO-APIC IRQs > (XEN) -> Using new ACK method > (XEN) Platform timer is 3.579MHz ACPI PM Timer > (XEN) Allocated console ring of 16 KiB. > (XEN) VMX: Supported advanced features: > (XEN) - APIC TPR shadow > (XEN) - Extended Page Tables (EPT) > (XEN) - Virtual-Processor Identifiers (VPID) > (XEN) - Virtual NMI > (XEN) - MSR direct-access bitmap > (XEN) - Unrestricted Guest > (XEN) HVM: ASIDs enabled. > (XEN) HVM: VMX enabled > (XEN) HVM: Hardware Assisted Paging (HAP) not detected > (XEN) Brought up 6 CPUs > (XEN) Dom0 has maximum 600 PIRQs > (XEN) *** LOADING DOMAIN 0 *** > (XEN) Xen kernel: 64-bit, lsb, compat32 > (XEN) Dom0 kernel: 64-bit, PAE, lsb, paddr 0x1000000 -> 0x3000000 > (XEN) PHYSICAL MEMORY ARRANGEMENT: > (XEN) Dom0 alloc.: 00000001b0000000->00000001b4000000 (504002 pages to be > allocated) > (XEN) Init. ramdisk: 00000001bf0c2000->00000001bffffe00 > (XEN) VIRTUAL MEMORY ARRANGEMENT: > (XEN) Loaded kernel: ffffffff81000000->ffffffff83000000 > (XEN) Init. ramdisk: 0000000000000000->0000000000000000 > (XEN) Phys-Mach map: 0000008000000000->0000008000400000 > (XEN) Start info: ffffffff83000000->ffffffff830004b4 > (XEN) Page tables: ffffffff83001000->ffffffff8301e000 > (XEN) Boot stack: ffffffff8301e000->ffffffff8301f000 > (XEN) TOTAL: ffffffff80000000->ffffffff83400000 > (XEN) ENTRY ADDRESS: ffffffff8200d1f0 > (XEN) Dom0 has maximum 6 VCPUs > (XEN) Std. Loglevel: Errors and warnings > (XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings) > (XEN) Xen is relinquishing VGA console. > (XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to > Xen) > (XEN) Freed 308kB init memory. > mapping kernel into physical memory > (XEN) traps.c:459:d0v0 Unhandled invalid opcode fault/trap [#6] on VCPU 0 > [ec=0000] > (XEN) domain_crash_sync called from entry.S: fault at ffff82d0802286c3 > create_bounce_frame+0x12b/0x13a > (XEN) Domain 0 (vcpu#0) crashed on cpu#0: > (XEN) ----[ Xen-4.5.4-pre x86_64 debug=n Not tainted ]---- > (XEN) CPU: 0 > (XEN) RIP: e033:[<ffffffff81053cbd>] > (XEN) RFLAGS: 0000000000000206 EM: 1 CONTEXT: pv guest (d0v0) > (XEN) rax: 0000000000000022 rbx: 00000000ffffffff rcx: 0000000000000000 > (XEN) rdx: 0000000000000022 rsi: 0000000000000003 rdi: 0000000000000000 > (XEN) rbp: ffffffff81b67ea8 rsp: ffffffff81b67e68 r8: 0000000000000001 > (XEN) r9: 0000000000000001 r10: ffffffff81b67f20 r11: 6c61765f74617020 > (XEN) r12: 0000000000000000 r13: 0000000000000003 r14: 0000000000000000 > (XEN) r15: ffffffff81b67ebb cr0: 000000008005003b cr4: 00000000001526b0 > (XEN) cr3: 00000001b16eb000 cr2: 0000000000000000 > (XEN) ds: 0000 es: 0000 fs: 0000 gs: 0000 ss: e02b cs: e033 > (XEN) Guest stack trace from rsp=ffffffff81b67e68: > (XEN) 0000000000000000 6c61765f74617020 ffffffff81053cbd 000000010000e030 > (XEN) 0000000000010006 ffffffff81b67ea8 000000000000e02b ffffffff81b67f20 > (XEN) ffffffff81b67f10 ffffffff8105b339 55ffffff81b67f10 5520204355202043 > (XEN) 5520204355202043 5520204355202043 0020204355202043 0000000000000000 > (XEN) 0000000000000000 ffffffff81b67f38 0000000000000000 0000000000000000 > (XEN) 0000000000000000 ffffffff81b67ff0 ffffffff82010d0a 0000000000000000 > (XEN) 000306f200000000 fed8320300010800 0000000000000000 0000000000000000 > (XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > (XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > (XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > (XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000 > (XEN) 0000000000000000 ffffffff81b68008 0000000000000000 0000000000000000 > (XEN) 0000000000000000 0000000000000000 00000000fffedb08 > (XEN) Domain 0 crashed: rebooting machine in 5 seconds. > (XEN) Resetting with ACPI MEMORY or I/O RESET_REG. > > The crash occurs in pat_init_cache_modes(), called by > xen_start_kernel(). The pat value from MSR_IA32_CR_PAT is 0. > Strangely, the same kernel and Xen boot just fine on VMware Fusion > 8.1.1, even though the MSR is 0 there as well. > > Anyway, guessing that it's pointless to call pat_init_cache_modes() > when the CPU doesn't support PAT, I added a check for cpu_has_pat. > This resolves the problem on ESXi and doesn't seem to break real > hardware, though I'm not sure how to verify PAT functionality. So > this is just an RFC. Cc-ing maintainers. > > diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c > index 9a29803..209f680 100644 > --- a/arch/x86/xen/enlighten.c > +++ b/arch/x86/xen/enlighten.c > @@ -1633,8 +1633,12 @@ asmlinkage __visible void __init xen_start_kernel(void) > * Modify the cache mode translation tables to match Xen's PAT > * configuration. > */ > - rdmsrl(MSR_IA32_CR_PAT, pat); > - pat_init_cache_modes(pat); > + if (cpu_has_pat) { > + rdmsrl(MSR_IA32_CR_PAT, pat); > + pat_init_cache_modes(pat); > + } else { > + xen_raw_console_write("CPU does not support PAT\n"); > + } > > /* keep using Xen gdt for now; no urgent need to change it */ > > > --Ed > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxx > http://lists.xen.org/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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