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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

  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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