- 17 Apr, 2008 40 commits
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Andi Kleen authored
When end_pfn is not aligned to 2MB (or 1GB) then the kernel might map more memory than end_pfn. Account this in max_pfn_mapped. Signed-off-by:
Andi Kleen <ak@suse.de> Cc: andreas.herrmann3@amd.com Cc: mingo@elte.hu Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
Ingo Molnar <mingo@elte.hu>
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Thomas Gleixner authored
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Andi Kleen authored
Even on 32bit 2MB pages can map more memory than is in the true max_low_pfn if end_pfn is not highmem and not aligned to 2MB. Add a end_pfn_map similar to x86-64 that accounts for this fact. This is important for code that really needs to know about all mapping aliases. Signed-off-by:
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Andi Kleen authored
Currently they are in .text.head because the rest of head_64.S. .text.head is not removed as init data, but the early exception handlers should be because they are not needed after early boot of the BP. So move them over. Signed-off-by:
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Andi Kleen authored
The early exception handlers are currently set up using a macro recursion. There is only one user left. Replace the macro with a standard loop in place. Noop patch, just a cleanup. [ tglx@linutronix.de: simplified ] Signed-off-by:
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Andi Kleen authored
All of early setup runs with interrupts disabled, so there is no need to set up early exception handlers for vectors >= 32 This saves some minor text size. Signed-off-by:
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gorcunov@gmail.com authored
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Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by:
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gorcunov@gmail.com authored
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gorcunov@gmail.com authored
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gorcunov@gmail.com authored
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Mathieu Desnoyers authored
* Ingo Molnar (mingo@elte.hu) wrote: > > * Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> wrote: > > > The shadow vmap for DEBUG_RODATA kernel text modification uses > > virt_to_page to get the pages from the pointer address. > > > > However, I think vmalloc_to_page would be required in case the page is > > used for modules. > > > > Since only the core kernel text is marked read-only, use > > kernel_text_address() to make sure we only shadow map the core kernel > > text, not modules. > > actually, i think we should mark module text readonly too. > Yes, but in the meantime, the x86 tree would need this patch to make kprobes work correctly on modules. I suspect that without this fix, with the enhanced hotplug and kprobes patch, kprobes will use text_poke to insert breakpoints in modules (vmalloced pages used), which will map the wrong pages and corrupt random kernel locations instead of updating the correct page. Work that would write protect the module pages should clearly be done, but it can come in a later time. We have to make sure we interact correctly with the page allocation debugging, as an example. Here is the patch against x86.git 2.6.25-rc5 : The shadow vmap for DEBUG_RODATA kernel text modification uses virt_to_page to get the pages from the pointer address. However, I think vmalloc_to_page would be required in case the page is used for modules. Since only the core kernel text is marked read-only, use kernel_text_address() to make sure we only shadow map the core kernel text, not modules. Signed-off-by:
Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> CC: akpm@linux-foundation.org Signed-off-by:
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Ravikiran G Thirumalai authored
vSMP detection: access pci config space early in boot to detect if the system is a vSMPowered box, and cache the result in a flag, so that is_vsmp_box() retrieves the value of the flag always. Signed-off-by:
Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by:
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Jiri Slaby authored
Some of pde bits weren't documented, add the short description to them. Signed-off-by:
Jiri Slaby <jirislaby@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Signed-off-by:
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Ingo Molnar authored
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Jeremy Fitzhardinge authored
The sysenter path tries to enable interrupts immediately. Unfortunately this doesn't work in a paravirt environment, because not enough kernel state has been set up at that point (namely, pointing %fs to the kernel percpu data segment). To fix this, defer ENABLE_INTERRUPTS until after the kernel state has been set up. Unfortunately this means that we're running with interrupts disabled for a while without calling the IRQ tracing code, but that can't be called without setting up %fs either. Signed-off-by:
Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by:
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Joe Perches authored
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Joe Perches <joe@perches.com> Signed-off-by:
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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Joe Perches authored
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