- 29 1月, 2013 1 次提交
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由 H. Peter Anvin 提交于
Use the new sentinel field to detect bootloaders which fail to follow protocol and don't initialize fields in struct boot_params that they do not explicitly initialize to zero. Based on an original patch and research by Yinghai Lu. Changed by hpa to be invoked both in the decompression path and in the kernel proper; the latter for the case where a bootloader takes over decompression. Originally-by: NYinghai Lu <yinghai@kernel.org> Link: http://lkml.kernel.org/r/1359058816-7615-26-git-send-email-yinghai@kernel.orgSigned-off-by: NH. Peter Anvin <hpa@linux.intel.com>
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- 09 5月, 2012 1 次提交
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由 Jarkko Sakkinen 提交于
Migrated ACPI wakeup code to the real-mode blob. Code existing in .x86_trampoline can be completely removed. Static descriptor table in wakeup_asm.S is courtesy of H. Peter Anvin. Signed-off-by: NJarkko Sakkinen <jarkko.sakkinen@intel.com> Link: http://lkml.kernel.org/r/1336501366-28617-7-git-send-email-jarkko.sakkinen@intel.com Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Len Brown <len.brown@intel.com> Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com>
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- 09 12月, 2011 1 次提交
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由 Tejun Heo 提交于
memblock_init() initializes arrays for regions and memblock itself; however, all these can be done with struct initializers and memblock_init() can be removed. This patch kills memblock_init() and initializes memblock with struct initializer. The only difference is that the first dummy entries don't have .nid set to MAX_NUMNODES initially. This doesn't cause any behavior difference. Signed-off-by: NTejun Heo <tj@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Michal Simek <monstr@monstr.eu> Cc: Paul Mundt <lethal@linux-sh.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Cc: "H. Peter Anvin" <hpa@zytor.com>
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- 15 7月, 2011 1 次提交
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由 Tejun Heo 提交于
Other than sanity check and debug message, the x86 specific version of memblock reserve/free functions are simple wrappers around the generic versions - memblock_reserve/free(). This patch adds debug messages with caller identification to the generic versions and replaces x86 specific ones and kills them. arch/x86/include/asm/memblock.h and arch/x86/mm/memblock.c are empty after this change and removed. Signed-off-by: NTejun Heo <tj@kernel.org> Link: http://lkml.kernel.org/r/1310462166-31469-14-git-send-email-tj@kernel.org Cc: Yinghai Lu <yinghai@kernel.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com>
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- 20 3月, 2011 1 次提交
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由 Yinghai Lu 提交于
Now cleanup_highmap actually is in two steps: one is early in head64.c and only clears above _end; a second one is in init_memory_mapping() and tries to clean from _brk_end to _end. It should check if those boundaries are PMD_SIZE aligned but currently does not. Also init_memory_mapping() is called several times for numa or memory hotplug, so we really should not handle initial kernel mappings there. This patch moves cleanup_highmap() down after _brk_end is settled so we can do everything in one step. Also we honor max_pfn_mapped in the implementation of cleanup_highmap. Signed-off-by: NYinghai Lu <yinghai@kernel.org> Signed-off-by: NStefano Stabellini <stefano.stabellini@eu.citrix.com> LKML-Reference: <alpine.DEB.2.00.1103171739050.3382@kaball-desktop> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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- 14 10月, 2010 1 次提交
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由 Jeremy Fitzhardinge 提交于
head_64.S maps up to 512 MiB, but that is not necessarity true for other entry paths, such as Xen. Thus, co-locate the setting of max_pfn_mapped with the code to actually set up the page tables in head_64.S. The 32-bit code is already so co-located. (The Xen code already sets max_pfn_mapped correctly for its own use case.) -v2: Yinghai fixed the following bug in this patch: | | max_pfn_mapped is in .bss section, so we need to set that | after bss get cleared. Without that we crash on bootup. | | That is safe because Xen does not call x86_64_start_kernel(). | Signed-off-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Fixed-by: NYinghai Lu <yinghai@kernel.org> Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com> LKML-Reference: <4CB6AB24.9020504@kernel.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 28 8月, 2010 2 次提交
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由 Yinghai Lu 提交于
1.include linux/memblock.h directly. so later could reduce e820.h reference. 2 this patch is done by sed scripts mainly -v2: use MEMBLOCK_ERROR instead of -1ULL or -1UL Signed-off-by: NYinghai Lu <yinghai@kernel.org> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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由 Yinghai Lu 提交于
1. replace find_e820_area with memblock_find_in_range 2. replace reserve_early with memblock_x86_reserve_range 3. replace free_early with memblock_x86_free_range. 4. NO_BOOTMEM will switch to use memblock too. 5. use _e820, _early wrap in the patch, in following patch, will replace them all 6. because memblock_x86_free_range support partial free, we can remove some special care 7. Need to make sure that memblock_find_in_range() is called after memblock_x86_fill() so adjust some calling later in setup.c::setup_arch() -- corruption_check and mptable_update -v2: Move reserve_brk() early Before fill_memblock_area, to avoid overlap between brk and memblock_find_in_range() that could happen We have more then 128 RAM entry in E820 tables, and memblock_x86_fill() could use memblock_find_in_range() to find a new place for memblock.memory.region array. and We don't need to use extend_brk() after fill_memblock_area() So move reserve_brk() early before fill_memblock_area(). -v3: Move find_smp_config early To make sure memblock_find_in_range not find wrong place, if BIOS doesn't put mptable in right place. -v4: Treat RESERVED_KERN as RAM in memblock.memory. and they are already in memblock.reserved already.. use __NOT_KEEP_MEMBLOCK to make sure memblock related code could be freed later. -v5: Generic version __memblock_find_in_range() is going from high to low, and for 32bit active_region for 32bit does include high pages need to replace the limit with memblock.default_alloc_limit, aka get_max_mapped() -v6: Use current_limit instead -v7: check with MEMBLOCK_ERROR instead of -1ULL or -1L -v8: Set memblock_can_resize early to handle EFI with more RAM entries -v9: update after kmemleak changes in mainline Suggested-by: NDavid S. Miller <davem@davemloft.net> Suggested-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Suggested-by: NThomas Gleixner <tglx@linutronix.de> Signed-off-by: NYinghai Lu <yinghai@kernel.org> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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- 30 3月, 2010 1 次提交
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由 Yinghai Lu 提交于
When CONFIG_NO_BOOTMEM=y, it could use memory more effiently, or in a more compact fashion. Example: Allocated new RAMDISK: 00ec2000 - 0248ce57 Move RAMDISK from 000000002ea04000 - 000000002ffcee56 to 00ec2000 - 0248ce56 The new RAMDISK's end is not page aligned. Last page could be shared with other users. When free_init_pages are called for initrd or .init, the page could be freed and we could corrupt other data. code segment in free_init_pages(): | for (; addr < end; addr += PAGE_SIZE) { | ClearPageReserved(virt_to_page(addr)); | init_page_count(virt_to_page(addr)); | memset((void *)(addr & ~(PAGE_SIZE-1)), | POISON_FREE_INITMEM, PAGE_SIZE); | free_page(addr); | totalram_pages++; | } last half page could be used as one whole free page. So page align the boundaries. -v2: make the original initramdisk to be aligned, according to Johannes, otherwise we have the chance to lose one page. we still need to keep initrd_end not aligned, otherwise it could confuse decompressor. -v3: change to WARN_ON instead, suggested by Johannes. -v4: use PAGE_ALIGN, suggested by Johannes. We may fix that macro name later to PAGE_ALIGN_UP, and PAGE_ALIGN_DOWN Add comments about assuming ramdisk start is aligned in relocate_initrd(), change to re get ramdisk_image instead of save it to make diff smaller. Add warning for wrong range, suggested by Johannes. -v6: remove one WARN() We need to align beginning in free_init_pages() do not copy more than ramdisk_size, noticed by Johannes Reported-by: NStanislaw Gruszka <sgruszka@redhat.com> Tested-by: NStanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: NYinghai Lu <yinghai@kernel.org> Acked-by: NJohannes Weiner <hannes@cmpxchg.org> Cc: David Miller <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <1269830604-26214-3-git-send-email-yinghai@kernel.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 11 12月, 2009 1 次提交
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由 Yinghai Lu 提交于
Jens found the following crash/regression: [ 0.000000] found SMP MP-table at [ffff8800000fdd80] fdd80 [ 0.000000] Kernel panic - not syncing: Overlapping early reservations 12-f011 MP-table mpc to 0-fff BIOS data page and [ 0.000000] Kernel panic - not syncing: Overlapping early reservations 12-f011 MP-table mpc to 6000-7fff TRAMPOLINE and bisected it to b24c2a92 ("x86: Move find_smp_config() earlier and avoid bootmem usage"). It turns out the BIOS is using the first 64k for mptable, without reserving it. So try to find good range for the real-mode trampoline instead of hard coding it, in case some bios tries to use that range for sth. Reported-by: NJens Axboe <jens.axboe@oracle.com> Signed-off-by: NYinghai Lu <yinghai@kernel.org> Tested-by: NJens Axboe <jens.axboe@oracle.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> LKML-Reference: <4B21630A.6000308@kernel.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 31 8月, 2009 1 次提交
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由 Thomas Gleixner 提交于
Platforms like Moorestown require early setup and want to avoid the call to reserve_ebda_region. The x86_init override is too late when the MRST detection happens in setup_arch. Move the default i386 x86_init overrides and the call to reserve_ebda_region into a separate function which is called as the default of a switch case depending on the hardware_subarch id in boot params. This allows us to add a case for MRST and let MRST have its own early setup function. Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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- 27 8月, 2009 1 次提交
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由 Thomas Gleixner 提交于
reserve_ebda_region needs to be called befor start_kernel. Moorestown needs to override it. Make it a x86_init_ops function and initialize it with the default reserve_ebda_region. Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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- 15 3月, 2009 1 次提交
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由 Jeremy Fitzhardinge 提交于
Impact: new interface Add a brk()-like allocator which effectively extends the bss in order to allow very early code to do dynamic allocations. This is better than using statically allocated arrays for data in subsystems which may never get used. The space for brk allocations is in the bss ELF segment, so that the space is mapped properly by the code which maps the kernel, and so that bootloaders keep the space free rather than putting a ramdisk or something into it. The bss itself, delimited by __bss_stop, ends before the brk area (__brk_base to __brk_limit). The kernel text, data and bss is reserved up to __bss_stop. Any brk-allocated data is reserved separately just before the kernel pagetable is built, as that code allocates from unreserved spaces in the e820 map, potentially allocating from any unused brk memory. Ultimately any unused memory in the brk area is used in the general kernel memory pool. Initially the brk space is set to 1MB, which is probably much larger than any user needs (the largest current user is i386 head_32.S's code to build the pagetables to map the kernel, which can get fairly large with a big kernel image and no PSE support). So long as the system has sufficient memory for the bootloader to reserve the kernel+1MB brk, there are no bad effects resulting from an over-large brk. Signed-off-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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- 20 1月, 2009 1 次提交
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由 Brian Gerst 提交于
Impact: cleanup Copy the code to cpu_init() to satisfy the requirement that the cpu be reinitialized. Remove all other calls, since the segments are already initialized in head_64.S. Signed-off-by: NBrian Gerst <brgerst@gmail.com> Signed-off-by: NTejun Heo <tj@kernel.org>
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- 16 1月, 2009 7 次提交
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由 Tejun Heo 提交于
Do the following cleanups: * kill x86_64_init_pda() which now is equivalent to pda_init() * use per_cpu_offset() instead of cpu_pda() when initializing initial_gs Signed-off-by: NTejun Heo <tj@kernel.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Tejun Heo 提交于
[ Based on original patch from Christoph Lameter and Mike Travis. ] As pda is now allocated in percpu area, it can easily be made a proper percpu variable. Make it so by defining per cpu symbol from linker script and declaring it in C code for SMP and simply defining it for UP. This change cleans up code and brings SMP and UP closer a bit. Signed-off-by: NTejun Heo <tj@kernel.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Tejun Heo 提交于
Now that pda is allocated as part of percpu, percpu doesn't need to be accessed through pda. Unify x86_64 SMP percpu access with x86_32 SMP one. Other than the segment register, operand size and the base of percpu symbols, they behave identical now. This patch replaces now unnecessary pda->data_offset with a dummy field which is necessary to keep stack_canary at its place. This patch also moves per_cpu_offset initialization out of init_gdt() into setup_per_cpu_areas(). Note that this change also necessitates explicit per_cpu_offset initializations in voyager_smp.c. With this change, x86_OP_percpu()'s are as efficient on x86_64 as on x86_32 and also x86_64 can use assembly PER_CPU macros. Signed-off-by: NTejun Heo <tj@kernel.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Tejun Heo 提交于
[ Based on original patch from Christoph Lameter and Mike Travis. ] Currently pdas and percpu areas are allocated separately. %gs points to local pda and percpu area can be reached using pda->data_offset. This patch folds pda into percpu area. Due to strange gcc requirement, pda needs to be at the beginning of the percpu area so that pda->stack_canary is at %gs:40. To achieve this, a new percpu output section macro - PERCPU_VADDR_PREALLOC() - is added and used to reserve pda sized chunk at the start of the percpu area. After this change, for boot cpu, %gs first points to pda in the data.init area and later during setup_per_cpu_areas() gets updated to point to the actual pda. This means that setup_per_cpu_areas() need to reload %gs for CPU0 while clearing pda area for other cpus as cpu0 already has modified it when control reaches setup_per_cpu_areas(). This patch also removes now unnecessary get_local_pda() and its call sites. A lot of this patch is taken from Mike Travis' "x86_64: Fold pda into per cpu area" patch. Signed-off-by: NTejun Heo <tj@kernel.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Tejun Heo 提交于
_cpu_pda array first uses statically allocated storage in data.init and then switches to allocated bootmem to conserve space. However, after folding pda area into percpu area, _cpu_pda array will be removed completely. Drop the reallocation part to simplify the code for soon-to-follow changes. Signed-off-by: NTejun Heo <tj@kernel.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Tejun Heo 提交于
[ Based on original patch from Christoph Lameter and Mike Travis. ] CPU startup code in head_64.S loaded address of a zero page into %gs for temporary use till pda is loaded but address to the actual pda is available at the point. Load the real address directly instead. This will help unifying percpu and pda handling later on. This patch is mostly taken from Mike Travis' "x86_64: Fold pda into per cpu area" patch. Signed-off-by: NTejun Heo <tj@kernel.org>
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由 Tejun Heo 提交于
[ Based on original patch from Christoph Lameter and Mike Travis. ] This patch makes percpu symbols zerobased on x86_64 SMP by adding PERCPU_VADDR() to vmlinux.lds.h which helps setting explicit vaddr on the percpu output section and using it in vmlinux_64.lds.S. A new PHDR is added as existing ones cannot contain sections near address zero. PERCPU_VADDR() also adds a new symbol __per_cpu_load which always points to the vaddr of the loaded percpu data.init region. The following adjustments have been made to accomodate the address change. * code to locate percpu gdt_page in head_64.S is updated to add the load address to the gdt_page offset. * __per_cpu_load is used in places where access to the init data area is necessary. * pda->data_offset is initialized soon after C code is entered as zero value doesn't work anymore. This patch is mostly taken from Mike Travis' "x86_64: Base percpu variables at zero" patch. Signed-off-by: NTejun Heo <tj@kernel.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 03 1月, 2009 1 次提交
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由 Ravikiran G Thirumalai 提交于
The pda rework (commit 3461b0af) to remove static boot cpu pdas introduced a performance bug. _boot_cpu_pda is the actual pda used by the boot cpu and is definitely not "__read_mostly" and ended up polluting the read mostly section with writes. This bug caused regression of about 8-10% on certain syscall intensive workloads. Signed-off-by: NRavikiran Thirumalai <kiran@scalex86.org> Acked-by: NMike Travis <travis@sgi.com> Cc: <stable@kernel.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 08 12月, 2008 1 次提交
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由 Rafael J. Wysocki 提交于
Impact: fix trampoline sizing bug, save space While debugging a suspend-to-RAM related issue it occured to me that if the trampoline code had grown past 4 KB, we would have been allocating too little memory for it, since the 4 KB size of the trampoline is hardcoded into arch/x86/kernel/e820.c . Change that by making the kernel compute the trampoline size and allocate as much memory as necessary. Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 29 9月, 2008 1 次提交
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由 dcg 提交于
Honour "quiet" boot parameter in early_printk() calls Signed-off-by: NDiego Calleja <diegocg@gmail.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 25 9月, 2008 1 次提交
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由 Bill Nottingham 提交于
Remove mostly useless message on every boot. Signed-off-by: NBill Nottingham <notting@redhat.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 15 8月, 2008 1 次提交
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由 Jan Beulich 提交于
Plus add a build time check so this doesn't go unnoticed again. Signed-off-by: NJan Beulich <jbeulich@novell.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 16 7月, 2008 1 次提交
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由 Jeremy Fitzhardinge 提交于
As a stopgap until Mike Travis's x86-64 gs-based percpu patches are ready, provide workaround functions for x86_read/write_percpu for Xen's use. Specifically, this means that we can't really make use of vcpu placement, because we can't use a single gs-based memory access to get to vcpu fields. So disable all that for now. Signed-off-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 08 7月, 2008 4 次提交
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由 Yinghai Lu 提交于
Ying Huang would like setup_data to be reserved, but not included in the no save range. Here we try to modify the e820 table to reserve that range early. also add that in early_res in case bootloader messes up with the ramdisk. other solution would be 1. add early_res_to_highmem... 2. early_res_to_e820... but they could reserve another type memory wrongly, if early_res has some resource reserved early, and not needed later, but it is not removed from early_res in time. Like the RAMDISK (already handled). Signed-off-by: NYinghai Lu <yhlu.kernel@gmail.com> Cc: andi@firstfloor.org Tested-by: NHuang, Ying <ying.huang@intel.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Jeremy Fitzhardinge 提交于
Split x86_64_start_kernel() into two pieces: The first essentially cleans up after head_64.S. It clears the bss, zaps low identity mappings, sets up some early exception handlers. The second part preserves the boot data, reserves the kernel's text/data/bss, pagetables and ramdisk, and then starts the kernel proper. This split is so that Xen can call the second part to do the set up it needs done. It doesn't need any of the first part setups, because it doesn't boot via head_64.S, and its redundant or actively damaging. Signed-off-by: NJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: xen-devel <xen-devel@lists.xensource.com> Cc: Stephen Tweedie <sct@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> Cc: Mark McLoughlin <markmc@redhat.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Mike Travis 提交于
Ingo Molnar wrote: ... > they crashed after about 3 randconfig iterations with: > > early res: 4 [8000-afff] PGTABLE > early res: 5 [b000-b87f] MEMNODEMAP > PANIC: early exception 0e rip 10:ffffffff8077a150 error 2 cr2 37 > Pid: 0, comm: swapper Not tainted 2.6.25-sched-devel.git-x86-latest.git #14 > > Call Trace: > [<ffffffff81466196>] early_idt_handler+0x56/0x6a > [<ffffffff8077a150>] ? numa_set_node+0x30/0x60 > [<ffffffff8077a129>] ? numa_set_node+0x9/0x60 > [<ffffffff8147a543>] numa_init_array+0x93/0xf0 > [<ffffffff8147b039>] acpi_scan_nodes+0x3b9/0x3f0 > [<ffffffff8147a496>] numa_initmem_init+0x136/0x150 > [<ffffffff8146da5f>] setup_arch+0x48f/0x700 > [<ffffffff802566ea>] ? clockevents_register_notifier+0x3a/0x50 > [<ffffffff81466a87>] start_kernel+0xd7/0x440 > [<ffffffff81466422>] x86_64_start_kernel+0x222/0x280 ... Here's the fixup... This one should follow the previous patches. Thanks, Mike Signed-off-by: NIngo Molnar <mingo@elte.hu> Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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由 Mike Travis 提交于
* Remove the boot_cpu_pda array and pointer table from the data section. Allocate the pointer table and array during init. do_boot_cpu() will reallocate the pda in node local memory and if the cpu is being brought up before the bootmem array is released (after_bootmem = 0), then it will free the initial pda. This will happen for all cpus present at system startup. This removes 512k + 32k bytes from the data section. For inclusion into sched-devel/latest tree. Based on: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git + sched-devel/latest .../mingo/linux-2.6-sched-devel.git Signed-off-by: NMike Travis <travis@sgi.com> Signed-off-by: NIngo Molnar <mingo@elte.hu> Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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- 05 6月, 2008 2 次提交
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由 Huang, Ying 提交于
This patch adds linked list of struct setup_data supported for i386. Signed-off-by: NHuang Ying <ying.huang@intel.com> Cc: andi@firstfloor.org Cc: mingo@redhat.com Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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由 Huang, Ying 提交于
This patch extracts the common part of head32.c and head64.c into head.c. Signed-off-by: NHuang Ying <ying.huang@intel.com> Cc: andi@firstfloor.org Cc: mingo@redhat.com Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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- 27 4月, 2008 1 次提交
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由 Huang, Ying 提交于
This patch adds a field of 64-bit physical pointer to NULL terminated single linked list of struct setup_data to real-mode kernel header. This is used as a more extensible boot parameters passing mechanism. Signed-off-by: NHuang Ying <ying.huang@intel.com> Signed-off-by: NIngo Molnar <mingo@elte.hu> Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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- 26 4月, 2008 1 次提交
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由 Akinobu Mita 提交于
Use get_bios_ebda(). Signed-off-by: NAkinobu Mita <akinobu.mita@gmail.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 20 4月, 2008 1 次提交
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由 Yinghai Lu 提交于
ramdisk is reserved via reserve_early in x86_64_start_kernel, later early_res_to_bootmem() will convert to reservation in bootmem. so don't need to reserve that again. Signed-off-by: NYinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: NIngo Molnar <mingo@elte.hu> Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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- 17 4月, 2008 4 次提交
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由 Andi Kleen 提交于
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: NAndi Kleen <ak@suse.de> Cc: mingo@elte.hu Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Alexander van Heukelum 提交于
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: NAlexander van Heukelum <heukelum@fastmail.fm> Acked-by: NH. Peter Anvin <hpa@zytor.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Alexander van Heukelum 提交于
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: NAlexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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由 Alexander van Heukelum 提交于
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: NAlexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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