1. 18 11月, 2008 1 次提交
    • Y
      x86: fix wakeup_cpu with numaq/es7000, v2 · 569712b2
      Yinghai Lu 提交于
      Impact: fix secondary-CPU wakeup/init path with numaq and es7000
      
      While looking at wakeup_secondary_cpu for WAKE_SECONDARY_VIA_NMI:
      
      |#ifdef WAKE_SECONDARY_VIA_NMI
      |/*
      | * Poke the other CPU in the eye via NMI to wake it up. Remember that the normal
      | * INIT, INIT, STARTUP sequence will reset the chip hard for us, and this
      | * won't ... remember to clear down the APIC, etc later.
      | */
      |static int __devinit
      |wakeup_secondary_cpu(int logical_apicid, unsigned long start_eip)
      |{
      |        unsigned long send_status, accept_status = 0;
      |        int maxlvt;
      |...
      |        if (APIC_INTEGRATED(apic_version[phys_apicid])) {
      |                maxlvt = lapic_get_maxlvt();
      
      I noticed that there is no warning about undefined phys_apicid...
      
      because WAKE_SECONDARY_VIA_NMI and WAKE_SECONDARY_VIA_INIT can not be
      defined at the same time. So NUMAQ is using wrong wakeup_secondary_cpu.
      
      WAKE_SECONDARY_VIA_NMI, WAKE_SECONDARY_VIA_INIT and
      WAKE_SECONDARY_VIA_MIP are variants of a weird and fragile
      preprocessor-driven "HAL" mechanisms to specify the kind of secondary-CPU
      wakeup strategy a given x86 kernel will use.
      
      The vast majority of systems want to use INIT for secondary wakeup - NUMAQ
      uses an NMI, (old-style-) ES7000 uses 'MIP' (a firmware driven in-memory
      flag to let secondaries continue).
      
      So convert these mechanisms to x86_quirks and add a
      ->wakeup_secondary_cpu() method to specify the rare exception
      to the sane default.
      
      Extend genapic accordingly as well, for 32-bit.
      
      While looking further, I noticed that functions in wakecup.h for numaq
      and es7000 are different to the default in mach_wakecpu.h - but smpboot.c
      will only use default mach_wakecpu.h with smphook.h.
      
      So we need to add mach_wakecpu.h for mach_generic, to properly support
      numaq and es7000, and vectorize the following SMP init methods:
      
      	int trampoline_phys_low;
      	int trampoline_phys_high;
      	void (*wait_for_init_deassert)(atomic_t *deassert);
      	void (*smp_callin_clear_local_apic)(void);
      	void (*store_NMI_vector)(unsigned short *high, unsigned short *low);
      	void (*restore_NMI_vector)(unsigned short *high, unsigned short *low);
      	void (*inquire_remote_apic)(int apicid);
      Signed-off-by: NYinghai Lu <yinghai@kernel.org>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      569712b2
  2. 17 4月, 2008 1 次提交
  3. 20 10月, 2007 1 次提交
  4. 11 10月, 2007 1 次提交
  5. 11 1月, 2007 1 次提交
    • V
      [PATCH] i386: make apic probe function non-init · e96763d6
      Vivek Goyal 提交于
      o struct genapic contains pointer to probe() function which is of type
        __init. Hence MODPOST generates warning if kernel is compiled with
        CONFIG_RELOCATABLE=y for i386.
      
      WARNING: vmlinux - Section mismatch: reference to .init.text: from .data between 'apic_summit' (at offset 0xc058b504) and 'apic_bigsmp'
      WARNING: vmlinux - Section mismatch: reference to .init.text: from .data between 'apic_bigsmp' (at offset 0xc058b5a4) and 'cpu.4471'
      WARNING: vmlinux - Section mismatch: reference to .init.text: from .data between 'apic_es7000' (at offset 0xc058b644) and 'apic_default'
      WARNING: vmlinux - Section mismatch: reference to .init.text: from .data between 'apic_default' (at offset 0xc058b6e4) and 'interrupt'
      
      o One of the possible options is to put special case check in MODPOST to
        not emit warnings for this case but I think it is not a very good option
        in terms of maintenance.
      
      o Another option is to make probe() function non __init. Anyway this function
        is really small so not freeing this memory after init is not a big deal.
        Secondly, from a programming perspective, probably genapic should not
        provide pointers to functions which have been freed as genapic is non
        __init and is used even after initialization is complete.
      Signed-off-by: NVivek Goyal <vgoyal@in.ibm.com>
      Signed-off-by: NAndi Kleen <ak@suse.de>
      Cc: "Eric W. Biederman" <ebiederm@xmission.com>
      Cc: Andi Kleen <ak@suse.de>
      Signed-off-by: NAndrew Morton <akpm@osdl.org>
      e96763d6
  6. 01 7月, 2006 1 次提交
  7. 17 4月, 2005 1 次提交
    • L
      Linux-2.6.12-rc2 · 1da177e4
      Linus Torvalds 提交于
      Initial git repository build. I'm not bothering with the full history,
      even though we have it. We can create a separate "historical" git
      archive of that later if we want to, and in the meantime it's about
      3.2GB when imported into git - space that would just make the early
      git days unnecessarily complicated, when we don't have a lot of good
      infrastructure for it.
      
      Let it rip!
      1da177e4