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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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6727ad9e20
When doing an nmi backtrace of many cores, most of which are idle, the output is a little overwhelming and very uninformative. Suppress messages for cpus that are idling when they are interrupted and just emit one line, "NMI backtrace for N skipped: idling at pc 0xNNN". We do this by grouping all the cpuidle code together into a new .cpuidle.text section, and then checking the address of the interrupted PC to see if it lies within that section. This commit suitably tags x86 and tile idle routines, and only adds in the minimal framework for other architectures. Link: http://lkml.kernel.org/r/1472487169-14923-5-git-send-email-cmetcalf@mellanox.com Signed-off-by: Chris Metcalf <cmetcalf@mellanox.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by: Daniel Thompson <daniel.thompson@linaro.org> [arm] Tested-by: Petr Mladek <pmladek@suse.com> Cc: Aaron Tomlin <atomlin@redhat.com> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net> Cc: Russell King <linux@arm.linux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
134 lines
2.4 KiB
ArmAsm
134 lines
2.4 KiB
ArmAsm
/* ld script to make FRV Linux kernel
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* Written by Martin Mares <mj@atrey.karlin.mff.cuni.cz>;
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*/
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OUTPUT_FORMAT("elf32-frv", "elf32-frv", "elf32-frv")
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OUTPUT_ARCH(frv)
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ENTRY(_start)
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#include <asm-generic/vmlinux.lds.h>
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#include <asm/processor.h>
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#include <asm/page.h>
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#include <asm/cache.h>
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#include <asm/thread_info.h>
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jiffies = jiffies_64 + 4;
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__page_offset = CONFIG_PAGE_OFFSET; /* start of area covered by struct pages */
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__kernel_image_start = __page_offset; /* address at which kernel image resides */
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SECTIONS
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{
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. = __kernel_image_start;
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/* discardable initialisation code and data */
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. = ALIGN(PAGE_SIZE); /* Init code and data */
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__init_begin = .;
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_sinittext = .;
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.init.text : {
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HEAD_TEXT
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#ifndef CONFIG_DEBUG_INFO
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INIT_TEXT
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EXIT_TEXT
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EXIT_DATA
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*(.exitcall.exit)
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#endif
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}
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_einittext = .;
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INIT_DATA_SECTION(8)
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PERCPU_SECTION(L1_CACHE_BYTES)
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. = ALIGN(PAGE_SIZE);
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__init_end = .;
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.trap : {
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/* trap table management - read entry-table.S before modifying */
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. = ALIGN(8192);
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__trap_tables = .;
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*(.trap.user)
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*(.trap.kernel)
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. = ALIGN(4096);
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*(.trap.break)
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}
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/* Text and read-only data */
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. = ALIGN(4);
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_text = .;
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_stext = .;
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.text : {
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*(.text..start)
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*(.text..entry)
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*(.text..break)
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*(.text..tlbmiss)
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TEXT_TEXT
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SCHED_TEXT
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CPUIDLE_TEXT
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LOCK_TEXT
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#ifdef CONFIG_DEBUG_INFO
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INIT_TEXT
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EXIT_TEXT
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*(.exitcall.exit)
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#endif
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*(.fixup)
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*(.gnu.warning)
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*(.exitcall.exit)
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} = 0x9090
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_etext = .; /* End of text section */
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RODATA
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.rodata : {
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*(.trap.vector)
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/* this clause must not be modified - the ordering and adjacency are imperative */
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__trap_fixup_tables = .;
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*(.trap.fixup.user .trap.fixup.kernel)
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}
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EXCEPTION_TABLE(8)
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_sdata = .;
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.data : { /* Data */
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INIT_TASK_DATA(THREAD_SIZE)
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CACHELINE_ALIGNED_DATA(L1_CACHE_BYTES)
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DATA_DATA
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*(.data.*)
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EXIT_DATA
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CONSTRUCTORS
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}
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_edata = .; /* End of data section */
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/* GP section */
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. = ALIGN(L1_CACHE_BYTES);
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_gp = . + 2048;
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PROVIDE (gp = _gp);
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.sdata : { *(.sdata .sdata.*) }
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/* BSS */
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. = ALIGN(L1_CACHE_BYTES);
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__bss_start = .;
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.sbss : { *(.sbss .sbss.*) }
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.bss : { *(.bss .bss.*) }
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.bss..stack : { *(.bss) }
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__bss_stop = .;
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_end = . ;
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. = ALIGN(PAGE_SIZE);
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__kernel_image_end = .;
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STABS_DEBUG
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DWARF_DEBUG
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.comment 0 : { *(.comment) }
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DISCARDS
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}
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__kernel_image_size_no_bss = __bss_start - __kernel_image_start;
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