- 17 Apr, 2008 40 commits
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venkatesh.pallipadi@intel.com authored
Add a set_memory_wc interface(), similar to set_memory_uc interface. Callers has to call set_memory_uc, set_memory_wb and set_memory_wc, set_memory_wb as pairs. Signed-off-by:
Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by:
Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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venkatesh.pallipadi@intel.com authored
Add reserve_memtype and free_memtype wrapper for pci_mmap_page_range. Free is called on unmap, but identity map continues to be mapped as per pci_mmap_page_range request, until next request for the same region calls ioremap_change_attr(), which will go through without conflict. This way of mapping is identical to one used in ioremap/iounmap. Signed-off-by:
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venkatesh.pallipadi@intel.com authored
Use reserve_memtype and free_memtype interfaces in set_memory_uc/set_memory_wb interfaces to avoid aliasing. Usage model of set_memory_uc and set_memory_wb is for RAM memory and users will first call set_memory_uc and call set_memory_wb after use to reset the attribute. Signed-off-by:
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venkatesh.pallipadi@intel.com authored
Use reserve_memtype and free_memtype interfaces in ioremap/iounmap to avoid aliasing. If there is an existing alias for the region, inherit the memory type from the alias. If there are conflicting aliases for the entire region, then fail ioremap. Signed-off-by:
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venkatesh.pallipadi@intel.com authored
Make ioremap_change_attr() non-static and use prot_val in place of ioremap_mode. This interface is used in subsequent PAT patches. Signed-off-by:
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Ingo Molnar authored
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venkatesh.pallipadi@intel.com authored
Sets up pat_init() infrastructure. PAT MSR has following setting. PAT |PCD ||PWT ||| 000 WB _PAGE_CACHE_WB 001 WC _PAGE_CACHE_WC 010 UC- _PAGE_CACHE_UC_MINUS 011 UC _PAGE_CACHE_UC We are effectively changing WT from boot time setting to WC. UC_MINUS is used to provide backward compatibility to existing /dev/mem users(X). reserve_memtype and free_memtype are new interfaces for maintaining alias-free mapping. It is currently implemented in a simple way with a linked list and not optimized. reserve and free tracks the effective memory type, as a result of PAT and MTRR setting rather than what is actually requested in PAT. pat_init piggy backs on mtrr_init as the rules for setting both pat and mtrr are same. Signed-off-by:
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venkatesh.pallipadi@intel.com authored
Documentation about PAT related interfaces, intended usage and memory attribute relationship. Signed-off-by:
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Pavel Machek authored
Initializing to zero is generally bad idea, I hope it is right for __init data, too. Signed-off-by:
Pavel Machek <pavel@suse.cz> Signed-off-by:
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Yinghai Lu authored
don't need to allocate that one by one Signed-off-by:
Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by:
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Yinghai Lu authored
do simple memtest after init_memory_mapping use find_e820_area_size to find all ram range that is not reserved. and do some simple bits test to find some bad ram. if find some bad ram, use reserve_early to exclude that range. Signed-off-by:
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Cyrill Gorcunov authored
This patch replaces numeric constant with an appropriate macro Also 0x800000000000UL is changed to bit shifting which is complement to the code comment (thanks hpa for notice) Signed-off-by:
Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by:
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Robert P. J. Day authored
After an experimental cleanup of <linux/percpu.h>, these files were exposed as invoking kmalloc() without including <linux/slab.h>. Signed-off-by:
Robert P. J. Day <rpjday@crashcourse.ca> Signed-off-by:
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Jan Beulich authored
There really is no need for a redundant implementation here, just keep the alternative name for allowing consumers to use consistent naming. Signed-off-by:
Jan Beulich <jbeulich@novell.com> Signed-off-by:
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Yakov Lerner authored
I was trying to get the address of instruction to be executed next after the kprobed instruction. But regs->eip in post_handler() contains value which is useless to the user. It's pre-corrected value. This value is difficult to use without access to resume_execution(), which is not exported anyway. I moved the invocation of post_handler() to *after* resume_execution(). Now regs->eip contains meaningful value in post_handler(). I do not think this change breaks any backward-compatibility. To make meaning of the old value, post_handler() would need access to resume_execution() which is not exported. I have difficulty to believe that previous, uncorrected, regs->eip can be meaningfully used in post_handler(). Signed-off-by:
Yakov Lerner <iler.ml@gmail.com> Acked-by:
Ananth N Mavinakayanahalli <ananth@in.ibm.com> Acked-by:
Masami Hiramatsu <mhiramat@redhat.com> Signed-off-by:
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Roland McGrath authored
Use force_sig in handle_vm86_trap like other machine traps do. Signed-off-by:
Roland McGrath <roland@redhat.com> Signed-off-by:
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Roland McGrath authored
The PT_DTRACE flag is meaningless and obsolete. Don't touch it. Signed-off-by:
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Roland McGrath authored
The previous "x86_64 ia32 ptrace vs -ENOSYS" fix only covered the int $0x80 system call entries. This does the same fix for the sysenter and syscall instruction paths. Signed-off-by:
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Roland McGrath authored
When we're stopped at syscall entry tracing, ptrace can change the %rax value from -ENOSYS to something else. If no system call is actually made because the syscall number (now in orig_rax) is bad, then we now always reset %rax to -ENOSYS again. This changes it to leave the return value alone after entry tracing. That way, the %rax value set by ptrace is there to be seen in user mode (or in syscall exit tracing). This is consistent with what the 32-bit kernel does. Signed-off-by:
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Roland McGrath authored
When we're stopped at syscall entry tracing, ptrace can change the %eax value from -ENOSYS to something else. If no system call is actually made because the syscall number (now in orig_eax) is bad, then the %eax value set by ptrace should be returned to the user. But, instead it gets reset to -ENOSYS again. This is a regression from the native 32-bit kernel. This change fixes it by leaving the return value alone after entry tracing. Signed-off-by:
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Adrian Bunk authored
This patch removes the write-only timer_uses_ioapic_pin_0 (gsi can't be <= 15 in the line of it's fake usage in mpparse_32.c). Spotted by the GNU C compiler. Signed-off-by:
Adrian Bunk <bunk@kernel.org> Signed-off-by:
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Ingo Molnar authored
code got a bit smaller: arch/x86/kernel/vsmp_64.o: text data bss dec hex filename 205 4 0 209 d1 vsmp_64.o.before 181 4 0 185 b9 vsmp_64.o.after Signed-off-by: -
Ravikiran G Thirumalai authored
Indicate TSCs are unreliable as time sources if the platform is a multi chassi ScaleMP vSMPowered machine. Signed-off-by:
Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by:
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Ravikiran G Thirumalai authored
Re-arrange set_vsmp_pv_ops so that pv_ops are set only if the platform has capability to support paravirtualized irq ops Signed-off-by:
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Ravikiran G Thirumalai authored
- Fix the the build breakage when PARAVIRT is defined but PCI is not This fixes problem reported at: http://marc.info/?l=linux-kernel&m=120525966600698&w=2 - Make is_vsmp_box() available even when PARAVIRT is not defined. This is needed to determine if tsc's are reliable as a time source even when PARAVIRT is not defined. - split vsmp_init to use is_vsmp_box() and set_vsmp_pv_ops() set_vsmp_pv_ops will do nothing if PCI is not enabled in the config. Signed-off-by:
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Ravikiran G Thirumalai authored
is_vsmp_box() currently does not work on vSMPowered systems, as pci cfg space is not read correctly -- This patch fixes it. Signed-off-by:
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Alexey Starikovskiy authored
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Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by:
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Alexey Starikovskiy authored
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Alexey Starikovskiy authored
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Alexey Starikovskiy authored
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Alexey Starikovskiy authored
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Alexey Starikovskiy authored
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Alexey Starikovskiy authored
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Alexey Starikovskiy authored
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Alexey Starikovskiy authored
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Alexey Starikovskiy authored
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Glauber de Oliveira Costa authored
Remove the last leftovers from the files. Move the ones that are still used to the files they belong, the others that grep can't reach, simply throw away. Merge comments ontop of file and that's it: smpboot integrated Signed-off-by:
Glauber Costa <gcosta@redhat.com> Signed-off-by:
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Glauber de Oliveira Costa authored
They are i386 specific (the x86_64 definitions live elsewhere, and should remain there), so are enclosed around an ifdef Signed-off-by:
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Glauber de Oliveira Costa authored
this is the last remaining function in smpboot_32.c Since it is i386 specific, move it around an ifdef to smpboot.c Signed-off-by:
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Glauber de Oliveira Costa authored
With the previous changes, code for native_smp_prepare_cpus() in i386 and x86_64 now look very similar. merge them into smpboot.c. Minor differences are inside ifdef Signed-off-by:
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