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Merge tag 'stable/for-linus-3.6-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen

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Pull Xen update from Konrad Rzeszutek Wilk:
 "Features:
   * Performance improvement to lower the amount of traps the hypervisor
     has to do 32-bit guests.  Mainly for setting PTE entries and
     updating TLS descriptors.
   * MCE polling driver to collect hypervisor MCE buffer and present
     them to /dev/mcelog.
   * Physical CPU online/offline support.  When an privileged guest is
     booted it is present with virtual CPUs, which might have an 1:1 to
     physical CPUs but usually don't.  This provides mechanism to
     offline/online physical CPUs.
  Bug-fixes for:
   * Coverity found fixes in the console and ACPI processor driver.
   * PVonHVM kexec fixes along with some cleanups.
   * Pages that fall within E820 gaps and non-RAM regions (and had been
     released to hypervisor) would be populated back, but potentially in
     non-RAM regions."

* tag 'stable/for-linus-3.6-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen: populate correct number of pages when across mem boundary (v2)
  xen PVonHVM: move shared_info to MMIO before kexec
  xen: simplify init_hvm_pv_info
  xen: remove cast from HYPERVISOR_shared_info assignment
  xen: enable platform-pci only in a Xen guest
  xen/pv-on-hvm kexec: shutdown watches from old kernel
  xen/x86: avoid updating TLS descriptors if they haven't changed
  xen/x86: add desc_equal() to compare GDT descriptors
  xen/mm: zero PTEs for non-present MFNs in the initial page table
  xen/mm: do direct hypercall in xen_set_pte() if batching is unavailable
  xen/hvc: Fix up checks when the info is allocated.
  xen/acpi: Fix potential memory leak.
  xen/mce: add .poll method for mcelog device driver
  xen/mce: schedule a workqueue to avoid sleep in atomic context
  xen/pcpu: Xen physical cpus online/offline sys interface
  xen/mce: Register native mce handler as vMCE bounce back point
  x86, MCE, AMD: Adjust initcall sequence for xen
  xen/mce: Add mcelog support for Xen platform
This commit is contained in:
Linus Torvalds
2012-07-24 13:14:03 -07:00
parent 5fecc9d8f5 c3d93f8801
commit 62c4d9afa4
23 changed files with 1514 additions and 93 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/kernel/cpu/mcheck/mce.c
View File

@@ -60,8 +60,6 @@ static DEFINE_MUTEX(mce_chrdev_read_mutex);
int mce_disabled __read_mostly;
#define MISC_MCELOG_MINOR 227
#define SPINUNIT 100 /* 100ns */
atomic_t mce_entry;
@@ -2346,7 +2344,7 @@ static __init int mcheck_init_device(void)
return err;
}
device_initcall(mcheck_init_device);
device_initcall_sync(mcheck_init_device);
/*
* Old style boot options parsing. Only for compatibility.

22
arch/x86/kernel/cpu/mcheck/mce_amd.c
View File

@@ -759,4 +759,24 @@ static __init int threshold_init_device(void)
return 0;
}
device_initcall(threshold_init_device);
/*
* there are 3 funcs which need to be _initcalled in a logic sequence:
* 1. xen_late_init_mcelog
* 2. mcheck_init_device
* 3. threshold_init_device
*
* xen_late_init_mcelog must register xen_mce_chrdev_device before
* native mce_chrdev_device registration if running under xen platform;
*
* mcheck_init_device should be inited before threshold_init_device to
* initialize mce_device, otherwise a NULL ptr dereference will cause panic.
*
* so we use following _initcalls
* 1. device_initcall(xen_late_init_mcelog);
* 2. device_initcall_sync(mcheck_init_device);
* 3. late_initcall(threshold_init_device);
*
* when running under xen, the initcall order is 1,2,3;
* on baremetal, we skip 1 and we do only 2 and 3.
*/
late_initcall(threshold_init_device);