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From: Adrian Hunter <adrian.hunter@intel.com> To: Thomas Gleixner <tglx@linutronix.de>, Arnaldo Carvalho de Melo <acme@kernel.org> Cc: Ingo Molnar <mingo@redhat.com>, Peter Zijlstra <peterz@infradead.org>, Andy Lutomirski <luto@kernel.org>, "H. Peter Anvin" <hpa@zytor.com>, Andi Kleen <ak@linux.intel.com>, Alexander Shishkin <alexander.shishkin@linux.intel.com>, Dave Hansen <dave.hansen@linux.intel.com>, Joerg Roedel <joro@8bytes.org>, Jiri Olsa <jolsa@redhat.com>, linux-kernel@vger.kernel.org, x86@kernel.org Subject: [PATCH V2 03/20] x86: Add entry trampolines to kcore Date: Thu, 17 May 2018 12:21:51 +0300 [thread overview] Message-ID: <1526548928-20790-4-git-send-email-adrian.hunter@intel.com> (raw) In-Reply-To: <1526548928-20790-1-git-send-email-adrian.hunter@intel.com> From: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> --- arch/x86/mm/cpu_entry_area.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/x86/mm/cpu_entry_area.c b/arch/x86/mm/cpu_entry_area.c index d1da5cf4b2de..fb1fbc8538fa 100644 --- a/arch/x86/mm/cpu_entry_area.c +++ b/arch/x86/mm/cpu_entry_area.c @@ -3,6 +3,7 @@ #include <linux/spinlock.h> #include <linux/percpu.h> #include <linux/kallsyms.h> +#include <linux/kcore.h> #include <asm/cpu_entry_area.h> #include <asm/pgtable.h> @@ -14,6 +15,7 @@ #ifdef CONFIG_X86_64 static DEFINE_PER_CPU_PAGE_ALIGNED(char, exception_stacks [(N_EXCEPTION_STACKS - 1) * EXCEPTION_STKSZ + DEBUG_STKSZ]); +static DEFINE_PER_CPU(struct kcore_list, kcore_entry_trampoline); #endif struct cpu_entry_area *get_cpu_entry_area(int cpu) @@ -147,6 +149,9 @@ static void __init setup_cpu_entry_area(int cpu) cea_set_pte(&get_cpu_entry_area(cpu)->entry_trampoline, __pa_symbol(_entry_trampoline), PAGE_KERNEL_RX); + kclist_add(&per_cpu(kcore_entry_trampoline, cpu), + &get_cpu_entry_area(cpu)->entry_trampoline, PAGE_SIZE, + KCORE_TEXT); #endif percpu_setup_debug_store(cpu); } -- 1.9.1
next prev parent reply other threads:[~2018-05-17 9:23 UTC|newest] Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-05-17 9:21 [PATCH V2 00/20] perf tools and x86 PTI entry trampolines Adrian Hunter 2018-05-17 9:21 ` [PATCH V2 01/20] kallsyms: Simplify update_iter_mod() Adrian Hunter 2018-05-17 9:21 ` [PATCH V2 02/20] kallsyms, x86: Export addresses of syscall trampolines Adrian Hunter 2018-05-17 9:21 ` Adrian Hunter [this message] 2018-05-17 17:52 ` [PATCH V2 03/20] x86: Add entry trampolines to kcore Dave Hansen 2018-05-17 18:09 ` Arnaldo Carvalho de Melo 2018-05-17 9:21 ` [PATCH V2 04/20] x86: kcore: Give entry trampolines all the same offset in kcore Adrian Hunter 2018-05-17 17:54 ` Dave Hansen 2018-05-17 9:21 ` [PATCH V2 05/20] perf tools: Add machine__is() to identify machine arch Adrian Hunter 2018-05-19 11:47 ` [tip:perf/core] perf machine: " tip-bot for Adrian Hunter 2018-05-17 9:21 ` [PATCH V2 06/20] perf tools: Fix kernel_start for PTI on x86 Adrian Hunter 2018-05-19 11:48 ` [tip:perf/core] " tip-bot for Adrian Hunter 2018-05-17 9:21 ` [PATCH V2 07/20] perf tools: Add machine__nr_cpus_avail() Adrian Hunter 2018-05-17 9:21 ` [PATCH V2 08/20] perf tools: Workaround missing maps for x86 PTI entry trampolines Adrian Hunter 2018-05-17 9:21 ` [PATCH V2 09/20] perf tools: Fix map_groups__split_kallsyms() for entry trampoline symbols Adrian Hunter 2018-05-17 9:21 ` [PATCH V2 10/20] perf tools: Allow for extra kernel maps Adrian Hunter 2018-05-17 9:21 ` [PATCH V2 11/20] perf tools: Create maps for x86 PTI entry trampolines Adrian Hunter 2018-05-17 9:22 ` [PATCH V2 12/20] perf tools: Synthesize and process mmap events " Adrian Hunter 2018-05-17 9:22 ` [PATCH V2 13/20] perf buildid-cache: kcore_copy: Keep phdr data in a list Adrian Hunter 2018-05-17 9:22 ` [PATCH V2 14/20] perf buildid-cache: kcore_copy: Keep a count of phdrs Adrian Hunter 2018-05-17 9:22 ` [PATCH V2 15/20] perf buildid-cache: kcore_copy: Calculate offset from phnum Adrian Hunter 2018-05-17 9:22 ` [PATCH V2 16/20] perf buildid-cache: kcore_copy: Layout sections Adrian Hunter 2018-05-17 9:22 ` [PATCH V2 17/20] perf buildid-cache: kcore_copy: Iterate phdrs Adrian Hunter 2018-05-17 9:22 ` [PATCH V2 18/20] perf buildid-cache: kcore_copy: Get rid of kernel_map Adrian Hunter 2018-05-17 9:22 ` [PATCH V2 19/20] perf buildid-cache: kcore_copy: Copy x86 PTI entry trampoline sections Adrian Hunter 2018-05-17 9:22 ` [PATCH V2 20/20] perf buildid-cache: kcore_copy: Amend the offset of sections that remap kernel text Adrian Hunter
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