linux.git/arch/x86/kernel/mpparse.c, branch v4.12

x86/boot/e820: Rename early_reserve_e820() to e820__memblock_alloc() and document it

2017-01-28T13:42:30+00:00

early_reserve_e820() is an early hack for kexec that does a limited fixup of the
mptable and passes it to the kexec kernel as if it was the real thing.

For this it needs to allocate memory - but no memory allocator is available yet
beyond the memblock allocator, so early_reserve_e820() is really a wrapper
around memblock_alloc() plus a hack to update the e820_table_firmware entries.

The name 'reserve' is really a bit of a misnomer, as 'reserved' memory typically
means memory completely inaccessible to the kernel - while here what we want to do
is a special RAM allocation for our own purposes and insert that as RAM_RESERVED.

Rename the function to e820__memblock_alloc_reserved() to better signal this dual
purpose, plus document it better, which was omitted when it was merged. The barely
comprehensible and cryptic comment:

  /*
   * pre allocated 4k and reserved it in memblock and e820_table_firmware
   */
  u64 __init e820__memblock_alloc_reserved(u64 size, u64 align)

... does not count as documentation, replace it with:

  /*
   * Allocate the requested number of bytes with the requsted alignment
   * and return (the physical address) to the caller. Also register this
   * range in the 'firmware' E820 table.
   *
   * This allows kexec to fake a new mptable, as if it came from the real
   * system.
   */
  u64 __init e820__memblock_alloc_reserved(u64 size, u64 align)

No change in functionality.

Cc: Alex Thorlton 
Cc: Andy Lutomirski 
Cc: Borislav Petkov 
Cc: Brian Gerst 
Cc: Dan Williams 
Cc: Denys Vlasenko 
Cc: H. Peter Anvin 
Cc: Huang, Ying 
Cc: Josh Poimboeuf 
Cc: Juergen Gross 
Cc: Linus Torvalds 
Cc: Paul Jackson 
Cc: Peter Zijlstra 
Cc: Rafael J. Wysocki 
Cc: Tejun Heo 
Cc: Thomas Gleixner 
Cc: Wei Yang 
Cc: Yinghai Lu 
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar

x86/boot/e820: Move asm/e820.h to asm/e820/api.h

2017-01-28T08:31:13+00:00

In line with asm/e820/types.h, move the e820 API declarations to
asm/e820/api.h and update all usage sites.

This is just a mechanical, obviously correct move & replace patch,
there will be subsequent changes to clean up the code and to make
better use of the new header organization.

Cc: Alex Thorlton 
Cc: Andy Lutomirski 
Cc: Borislav Petkov 
Cc: Brian Gerst 
Cc: Dan Williams 
Cc: Denys Vlasenko 
Cc: H. Peter Anvin 
Cc: Huang, Ying 
Cc: Josh Poimboeuf 
Cc: Juergen Gross 
Cc: Linus Torvalds 
Cc: Paul Jackson 
Cc: Peter Zijlstra 
Cc: Rafael J. Wysocki 
Cc: Tejun Heo 
Cc: Thomas Gleixner 
Cc: Wei Yang 
Cc: Yinghai Lu 
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar

x86/mm/numa: Open code function early_get_boot_cpu_id()

2016-08-15T06:51:54+00:00

Previously early_acpi_boot_init() was called in early_get_boot_cpu_id()
to get the value for boot_cpu_physical_apicid. Now early_acpi_boot_init()
has been taken out and moved to setup_arch(), the name of
early_get_boot_cpu_id() doesn't match its implementation anymore, and
only the getting boot-time SMP configuration code was left.

So in this patch we open code it.

Also move the smp_found_config check into default_get_smp_config to
simplify code, because both early_get_smp_config() and get_smp_config()
call x86_init.mpparse.get_smp_config().

Also remove the redundent CONFIG_X86_MPPARSE #ifdef check when we call
early_get_smp_config().

Signed-off-by: Baoquan He 
Cc: Andy Lutomirski 
Cc: Borislav Petkov 
Cc: Brian Gerst 
Cc: Denys Vlasenko 
Cc: H. Peter Anvin 
Cc: Josh Poimboeuf 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Cc: linux-acpi@vger.kernel.org
Cc: rjw@rjwysocki.net
Link: http://lkml.kernel.org/r/1470985033-22493-1-git-send-email-bhe@redhat.com
Signed-off-by: Ingo Molnar

x86/kernel: Audit and remove any unnecessary uses of module.h

2016-07-14T13:06:41+00:00

Historically a lot of these existed because we did not have
a distinction between what was modular code and what was providing
support to modules via EXPORT_SYMBOL and friends.  That changed
when we forked out support for the latter into the export.h file.

This means we should be able to reduce the usage of module.h
in code that is obj-y Makefile or bool Kconfig.  The advantage
in doing so is that module.h itself sources about 15 other headers;
adding significantly to what we feed cpp, and it can obscure what
headers we are effectively using.

Since module.h was the source for init.h (for __init) and for
export.h (for EXPORT_SYMBOL) we consider each obj-y/bool instance
for the presence of either and replace as needed.  Build testing
revealed some implicit header usage that was fixed up accordingly.

Note that some bool/obj-y instances remain since module.h is
the header for some exception table entry stuff, and for things
like __init_or_module (code that is tossed when MODULES=n).

Signed-off-by: Paul Gortmaker 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Link: http://lkml.kernel.org/r/20160714001901.31603-4-paul.gortmaker@windriver.com
Signed-off-by: Ingo Molnar

x86/cpufeature: Use enum cpuid_leafs instead of magic numbers

2016-02-01T09:46:48+00:00

Most of the magic numbers in x86_capability[] have been converted to
'enum cpuid_leafs', and this patch updates the remaining part.

Signed-off-by: Huaitong Han 
Signed-off-by: Borislav Petkov 
Cc: Alexander Kuleshov 
Cc: Andrew Morton 
Cc: Andy Lutomirski 
Cc: Boris Ostrovsky 
Cc: Borislav Petkov 
Cc: Brian Gerst 
Cc: David Vrabel 
Cc: Denys Vlasenko 
Cc: H. Peter Anvin 
Cc: Hector Marco-Gisbert 
Cc: Jiang Liu 
Cc: Kees Cook 
Cc: Konrad Rzeszutek Wilk 
Cc: Linus Torvalds 
Cc: Peter Zijlstra 
Cc: Rusty Russell 
Cc: Thomas Gleixner 
Cc: Tony Luck 
Cc: Viresh Kumar 
Cc: lguest@lists.ozlabs.org
Cc: xen-devel@lists.xenproject.org
Link: http://lkml.kernel.org/r/1453750913-4781-3-git-send-email-bp@alien8.de
Signed-off-by: Ingo Molnar

x86: Cleanup irq_domain ops

2015-04-24T13:36:55+00:00

We have 3 identical copies of the ioapic domain ops for acpi, mpparse,
and sfi. Have a global one in the io_apic code and be done with it.

To avoid include hell in io_apic.h, create a private irqdomain header
and include the generic irqdomain header from there.

Signed-off-by: Thomas Gleixner 
Signed-off-by: Jiang Liu 
Cc: Konrad Rzeszutek Wilk 
Cc: David Cohen 
Cc: Sander Eikelenboom 
Cc: David Vrabel 
Cc: Tony Luck 
Cc: Joerg Roedel 
Cc: Greg Kroah-Hartman 
Cc: sfi-devel@simplefirmware.org
Cc: Bjorn Helgaas 
Cc: Benjamin Herrenschmidt 
Cc: Rafael J. Wysocki 
Cc: Randy Dunlap 
Cc: Yinghai Lu 
Cc: Borislav Petkov 
Cc: Dimitri Sivanich 
Cc: Len Brown 
Cc: Pavel Machek 
Cc: Grant Likely 
Cc: Rob Herring 
Cc: x86@kernel.org
Link: http://lkml.kernel.org/r/1428978610-28986-32-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner

x86/irq: Convert IOAPIC to use hierarchical irqdomain interfaces

2015-04-24T13:36:51+00:00

Convert IOAPIC driver to support and use hierarchical irqdomain
interfaces.  It's a little big, but would break bisecting if we split
it into multiple patches.

Fold in a patch from Andy Shevchenko 
to make it bisectable.
http://lkml.org/lkml/2014/12/10/622

Signed-off-by: Jiang Liu 
Tested-by: Joerg Roedel 
Cc: Konrad Rzeszutek Wilk 
Cc: Sander Eikelenboom 
Cc: David Vrabel 
Cc: Tony Luck 
Cc: Joerg Roedel 
Cc: Greg Kroah-Hartman 
Cc: Andy Shevchenko 
Cc: sfi-devel@simplefirmware.org
Cc: Bjorn Helgaas 
Cc: Benjamin Herrenschmidt 
Cc: Rafael J. Wysocki 
Cc: Randy Dunlap 
Cc: Yinghai Lu 
Cc: Borislav Petkov 
Cc: Dimitri Sivanich 
Cc: Len Brown 
Cc: Pavel Machek 
Cc: Grant Likely 
Cc: Rob Herring 
Cc: David Rientjes 
Cc: David Cohen 
Link: http://lkml.kernel.org/r/1428905519-23704-38-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner

x86, apic: Remove mps_oem_check callback

2014-07-31T15:05:42+00:00

Since commit b5660ba76b41 ("x86, platforms: Remove NUMAQ") removed NUMAQ,
the mps_oem_check() apic callback has been obsolete.  Remove it.

This allows generic_mps_oem_check() to be removed as well.

Signed-off-by: David Rientjes 
Link: http://lkml.kernel.org/r/alpine.DEB.2.02.1407302349390.17503@chino.kir.corp.google.com
Signed-off-by: H. Peter Anvin

x86, irq, mpparse: Release IOAPIC pin when PCI device is disabled

2014-06-21T21:05:44+00:00

Release IOAPIC pin associated with PCI device when the PCI device
is disabled.

Signed-off-by: Jiang Liu 
Cc: Konrad Rzeszutek Wilk 
Cc: Tony Luck 
Cc: Joerg Roedel 
Cc: Paul Gortmaker 
Cc: Greg Kroah-Hartman 
Cc: Benjamin Herrenschmidt 
Cc: Grant Likely 
Cc: Rafael J. Wysocki 
Cc: Bjorn Helgaas 
Cc: Randy Dunlap 
Cc: Yinghai Lu 
Link: http://lkml.kernel.org/r/1402302011-23642-40-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner

x86, irq, mpparse: Use common irqdomain map interface to program IOAPIC pins

2014-06-21T21:05:43+00:00

Refine mpparse to use common irqdomain map interface to program IOAPIC pins,
so we can unify the callsite to progam IOAPIC pins.

Signed-off-by: Jiang Liu 
Cc: Konrad Rzeszutek Wilk 
Cc: Tony Luck 
Cc: Joerg Roedel 
Cc: Paul Gortmaker 
Cc: Greg Kroah-Hartman 
Cc: Benjamin Herrenschmidt 
Cc: Grant Likely 
Cc: Rafael J. Wysocki 
Cc: Bjorn Helgaas 
Cc: Randy Dunlap 
Cc: Yinghai Lu 
Link: http://lkml.kernel.org/r/1402302011-23642-32-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner