- 17 Apr, 2008 40 commits
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Glauber Costa authored
This patch creates smpcommon.c with functions that are equal between architectures. The i386-only init_gdt is ifdef'd. Note that smpcommon.o figures twice in the Makefile: this is because sub-architectures like voyager that does not use the normal smp_$(BITS) files also have to access them Signed-off-by:
Glauber Costa <gcosta@redhat.com> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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Glauber Costa authored
there's already a warning in the topmost function Signed-off-by:
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Glauber Costa authored
with this removal, exports for both i386 and x86_64, regarding the "smp_call_function" series are now the same. Signed-off-by:
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Glauber Costa authored
this patches moves prefill_possible_map() to smpboot.c Right now it is x86_64-specific, but nothing intrinsically prevents it to be used by i386 Signed-off-by:
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Glauber Costa authored
this patch allows a cpu to be marked as present but disabled in i386, just as x86_64 currently does. Signed-off-by:
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Glauber Costa authored
disabled_cpus is (up to now) a x86_64-only contruction. But it's extern declaration can be moved to common header anyway Signed-off-by:
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Glauber Costa authored
definition is moved to common header. x86_64 version is now called native_smp_cpus_done Signed-off-by:
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Glauber Costa authored
definition is moved to common header. x86_64 version is now called native_smp_prepare_cpus Signed-off-by:
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Glauber Costa authored
definition is moved to common header. x86_64 version is now called native_prepare_boot_cpu Signed-off-by:
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Glauber Costa authored
function definition is moved to common header. x86_64 version is now called native_cpu_up Signed-off-by:
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Glauber Costa authored
definition is moved to common header, x86_64 function name now is native_smp_call_function_mask Signed-off-by:
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Glauber Costa authored
function definition is moved to common header, x86_64 version is now called native_smp_send_reschedule Signed-off-by:
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Glauber Costa authored
the smp_ops symbol is temporarily defined in smp_64.c, but it will soon be unified Signed-off-by:
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Glauber Costa authored
x86_64 will benefit from it Signed-off-by:
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Glauber Costa authored
move extern definitions that are the same between smp_{32,64}.h to smp.h Signed-off-by: -
Glauber Costa authored
move extern function definitions that are the same between smp_{32,64}.h to smp.h Signed-off-by: -
Glauber Costa authored
this is the first step of integrating smp.h between x86_64 and i386 Signed-off-by:
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Ingo Molnar authored
Liu Pingfan noticed that switch_to() clobbers more registers than its asm constraints specify. We get away with this due to luck mostly - schedule() by its nature only has 'local' state which gets reloaded automatically. Fix it nevertheless, we could hit this anytime. it turns out that with the extra constraints gcc manages to make schedule() even more compact: text data bss dec hex filename 28626 684 2640 31950 7cce sched.o.before 28613 684 2640 31937 7cc1 sched.o.after Reported-by:
Liu Pingfan <kernelfans@gmail.com> Signed-off-by:
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Ingo Molnar authored
Make the code more readable and more hackable: - use symbolic asm parameters - use readable indentation - add comments that explains the details No code changed: kernel/sched.o: text data bss dec hex filename 28626 684 2640 31950 7cce sched.o.before 28626 684 2640 31950 7cce sched.o.after md5: 2823d406c18b781975cdb2e7cfea0059 sched.o.before.asm 2823d406c18b781975cdb2e7cfea0059 sched.o.after.asm Signed-off-by: -
Alexander van Heukelum authored
Jeremy Fitzhardinge pointed out that looking at the boot_params struct to determine if the system is running in a paravirtual environment is not reliable for the Xen case, currently. He also points out that there already exists a function to determine if the system is running in a paravirtual environment. So let's use that instead. This gets rid of the preprocessor test too. Signed-off-by:
Alexander van Heukelum <heukelum@fastmail.fm> Acked-by:
H. Peter Anvin <hpa@zytor.com> Signed-off-by:
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Alexander van Heukelum authored
Jeremy Fitzhardinge pointed out that looking at the boot_params struct to determine if the system is running in a paravirtual environment is not reliable for the Xen case, currently. He also points out that there already exists a function to determine if the system is running in a paravirtual environment. So let's use that instead. This gets rid of the preprocessor test too. Signed-off-by:
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Pavel Machek authored
Comment says wmb is a nop, but it is implemented as lock addl below... Should it be compiled to nop if we know we are running on "good" Intel cpu? At least remove confusing comment for now. Signed-off-by:
Pavel Machek <pavel@suse.cz> Signed-off-by:
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Rusty Russell authored
The current tsc_init() clears the TSC feature bit if the TSC khz cannot be calculated, causing us to panic in arch/x86/kernel/cpu/bugs.c check_config(). We should simply mark it unstable. Frankly, someone should take an axe to this code. mark_tsc_unstable() not only marks it unstable, but sets tsc_enabled to 0, which seems redundant but is actually important here because means it won't be used by sched_clock() either. Perhaps a tristate enum "UNUSABLE, UNSTABLE, OK" would be clearer, and separate mark_tsc_unstable() and mark_tsc_broken() functions? Signed-off-by:
Rusty Russell <rusty@rustcorp.com.au> Signed-off-by:
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Ingo Molnar authored
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Ingo Molnar authored
redo commit cded932b. Signed-off-by:
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Ingo Molnar authored
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Alexander van Heukelum authored
This patch is an add-on to the 64-bit ebda patch. It makes the functions reserve_ebda_region (renamed from reserve_ebda) and copy_e820_map equal to the 32-bit versions of the previous patch. Changes: Use u64 and u32 for local variables in copy_e820_map. The amount of conventional memory and the start of the EBDA are detected by reading the BIOS data area directly. Paravirtual environments do not provide this area, so we bail out early in that case. They will just have to set up a correct memory map to start with. Add a safety net for zeroed out BIOS data area. Signed-off-by:
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Alexander van Heukelum authored
Explicitly reserve_early the whole address range from the end of conventional memory as reported by the bios data area up to the 1Mb mark. Regard the info retrieved from the BIOS data area with a bit of paranoia, though, because some biosses forget to register the EBDA correctly. Signed-off-by:
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Alexander van Heukelum authored
This patch adds explicit detection of the EBDA and reservation of the rom and adapter address space 0xa0000-0x100000 to the i386 kernels. Before this patch, the EBDA size was hardcoded as 4Kb. Also, the reservation of the adapter range was done by modifying the e820 map which is now not necessary any longer, and that code is removed from copy_e820_map. The amount of conventional memory and the start of the EBDA are detected by reading the BIOS data area directly. Paravirtual environments do not provide this area, so we bail out early in that case. They will just have to set up a correct memory map to start with. Signed-off-by:
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Roman Zippel authored
The proper dependency check uncovered a few dependency problems, the subarchitecture used a mixture of selects and depends on SMP and PCI dependency was messed up. Signed-off-by:
Roman Zippel <zippel@linux-m68k.org> Signed-off-by:
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Jeremy Fitzhardinge authored
Change iret implementation to not be dependent on direct-access vcpu structure. Signed-off-by:
Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by:
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Paolo Ciarrocchi authored
Depends on: [PATCH 2/3] x86: coding style fixes to arch/x86/kernel/early_printk.c Remove two: ERROR: do not initialise statics to 0 or NULL paolo@paolo-desktop:/tmp/c$ size * text data bss dec hex filename 1172 280 12 1464 5b8 early_printk.o.after 1172 280 12 1464 5b8 early_printk.o.before This patch is changing the binary output: paolo@paolo-desktop:/tmp/c$ md5sum * dad9a9a881e0eeda62cc5645bd3d7cad early_printk.o.after da32f5cd8f248970e4809e1005393e95 early_printk.o.before because the two variables moved to another section. No change in functionality. Signed-off-by:
Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com> Signed-off-by:
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Paolo Ciarrocchi authored
Before: total: 17 errors, 3 warnings, 254 lines checked After: total: 2 errors, 3 warnings, 254 lines checked paolo@paolo-desktop:/tmp/b$ md5sum * da32f5cd8f248970e4809e1005393e95 early_printk.o.after da32f5cd8f248970e4809e1005393e95 early_printk.o.before paolo@paolo-desktop:/tmp/b$ size * text data bss dec hex filename 1172 280 12 1464 5b8 early_printk.o.after 1172 280 12 1464 5b8 early_printk.o.befor Signed-off-by:
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Paolo Ciarrocchi authored
Before: total: 63 errors, 2 warnings, 878 lines checked After: total: 0 errors, 2 warnings, 878 lines checked Compile tested, no change in the binary output: text data bss dec hex filename 3231 0 0 3231 c9f usercopy_32.o.after 3231 0 0 3231 c9f usercopy_32.o.before md5sum: 9f9a3eb43970359ae7cecfd1c9e7cf42 usercopy_32.o.after 9f9a3eb43970359ae7cecfd1c9e7cf42 usercopy_32.o.before Signed-off-by:
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Ingo Molnar authored
Suggested by Jan Beulich. Signed-off-by:
Jan Beulich <jbeulich@novell.com>
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Hiroshi Shimamoto authored
X86_HT is used for hyperthreading or multicore on 32-bit. The X86_HT on 64-bit is different from 32-bit, it means hyperthreading only. And X86_HT is not used on 64-bit except from cpu/initel_cacheinfo.c. Unify X86_HT for hyperthreading or multicore. Turn X86_HT on when X86_64 and SMP are enabled. Signed-off-by:
Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by:
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Thomas Gleixner authored
Roland Dreier reported in http://lkml.org/lkml/2008/2/27/194 [ 8425.915139] BUG: unable to handle kernel paging request at ffffc20001a0a000 [ 8425.919087] IP: [<ffffffff8021dacc>] clflush_cache_range+0xc/0x25 [ 8425.919087] PGD 1bf80e067 PUD 1bf80f067 PMD 1bb497067 PTE 80000047000ee17b This is on a Intel machine with 36bit physical address space. The PTE entry references 47000ee000, which is outside of it. Add a check for the physical address space and warn/printk about the stupid caller. Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
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Markus Armbruster authored
This makes the Xen console just work. Before, you had to ask for it on the kernel command line with console=hvc0 Signed-off-by:
Markus Armbruster <armbru@redhat.com> Signed-off-by:
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Ingo Molnar authored
notrace signals that a function should not be traced. Most of the time this is used by tracers to annotate code that cannot be traced - it's in a volatile state (such as in user vdso context or NMI context) or it's in the tracer internals. Signed-off-by: -
Alexey Dobriyan authored
Signed-off-by:
Alexey Dobriyan <adobriyan@sw.ru> Signed-off-by:
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