From: "tip-bot2 for Thomas Gleixner" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Alexandre Chartre <alexandre.chartre@oracle.com>,
Peter Zijlstra <peterz@infradead.org>,
Andy Lutomirski <luto@kernel.org>, x86 <x86@kernel.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: [tip: x86/entry] x86/idtentry: Provide IDTRENTRY_NOIST variants for #DB and #MC
Date: Tue, 19 May 2020 19:58:20 -0000 [thread overview]
Message-ID: <158991830005.17951.1353363997980016294.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20200505135315.084882104@linutronix.de>
The following commit has been merged into the x86/entry branch of tip:
Commit-ID: 97f4e8b75a99efc7376b6c7b5bc2a3124f609bc1
Gitweb: https://git.kernel.org/tip/97f4e8b75a99efc7376b6c7b5bc2a3124f609bc1
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Tue, 25 Feb 2020 23:33:28 +01:00
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Tue, 19 May 2020 16:04:12 +02:00
x86/idtentry: Provide IDTRENTRY_NOIST variants for #DB and #MC
Provide NOIST entry point macros which allows to implement NOIST variants
of the C entry points. These are invoked when #DB or #MC enter from user
space. This allows explicit handling of the difference between user mode
and kernel mode entry later.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/20200505135315.084882104@linutronix.de
---
arch/x86/include/asm/idtentry.h | 19 +++++++++++++++++--
1 file changed, 17 insertions(+), 2 deletions(-)
diff --git a/arch/x86/include/asm/idtentry.h b/arch/x86/include/asm/idtentry.h
index fcd4230..060f9e3 100644
--- a/arch/x86/include/asm/idtentry.h
+++ b/arch/x86/include/asm/idtentry.h
@@ -138,10 +138,12 @@ __visible noinstr void func(struct pt_regs *regs)
* @vector: Vector number (ignored for C)
* @func: Function name of the entry point
*
- * Maps to DECLARE_IDTENTRY_RAW
+ * Maps to DECLARE_IDTENTRY_RAW, but declares also the NOIST C handler
+ * which is called from the ASM entry point on user mode entry
*/
#define DECLARE_IDTENTRY_IST(vector, func) \
- DECLARE_IDTENTRY_RAW(vector, func)
+ DECLARE_IDTENTRY_RAW(vector, func); \
+ __visible void noist_##func(struct pt_regs *regs)
/**
* DEFINE_IDTENTRY_IST - Emit code for IST entry points
@@ -152,6 +154,17 @@ __visible noinstr void func(struct pt_regs *regs)
#define DEFINE_IDTENTRY_IST(func) \
DEFINE_IDTENTRY_RAW(func)
+/**
+ * DEFINE_IDTENTRY_NOIST - Emit code for NOIST entry points which
+ * belong to a IST entry point (MCE, DB)
+ * @func: Function name of the entry point. Must be the same as
+ * the function name of the corresponding IST variant
+ *
+ * Maps to DEFINE_IDTENTRY_RAW().
+ */
+#define DEFINE_IDTENTRY_NOIST(func) \
+ DEFINE_IDTENTRY_RAW(noist_##func)
+
#else /* CONFIG_X86_64 */
/* Maps to a regular IDTENTRY on 32bit for now */
# define DECLARE_IDTENTRY_IST DECLARE_IDTENTRY
@@ -161,12 +174,14 @@ __visible noinstr void func(struct pt_regs *regs)
/* C-Code mapping */
#define DECLARE_IDTENTRY_MCE DECLARE_IDTENTRY_IST
#define DEFINE_IDTENTRY_MCE DEFINE_IDTENTRY_IST
+#define DEFINE_IDTENTRY_MCE_USER DEFINE_IDTENTRY_NOIST
#define DECLARE_IDTENTRY_NMI DECLARE_IDTENTRY_IST
#define DEFINE_IDTENTRY_NMI DEFINE_IDTENTRY_IST
#define DECLARE_IDTENTRY_DEBUG DECLARE_IDTENTRY_IST
#define DEFINE_IDTENTRY_DEBUG DEFINE_IDTENTRY_IST
+#define DEFINE_IDTENTRY_DEBUG_USER DEFINE_IDTENTRY_NOIST
/**
* DECLARE_IDTENTRY_XEN - Declare functions for XEN redirect IDT entry points
next prev parent reply other threads:[~2020-05-19 19:58 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-05 13:49 [patch V4 part 4 00/24] x86/entry: Entry/exception code rework, nasty exceptions Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 01/24] x86/int3: Ensure that poke_int3_handler() is not traced Thomas Gleixner
2020-05-14 4:57 ` Andy Lutomirski
2020-05-19 19:58 ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 02/24] x86/int3: Avoid atomic instrumentation Thomas Gleixner
2020-05-08 13:27 ` Masami Hiramatsu
2020-05-14 4:57 ` Andy Lutomirski
2020-05-14 9:32 ` Peter Zijlstra
2020-05-14 12:51 ` Thomas Gleixner
2020-05-14 13:15 ` Peter Zijlstra
2020-05-14 14:55 ` Andy Lutomirski
2020-05-14 15:06 ` Thomas Gleixner
2020-05-14 15:08 ` Andy Lutomirski
2020-05-14 15:10 ` Peter Zijlstra
2020-05-19 19:58 ` [tip: x86/entry] " tip-bot2 for Peter Zijlstra
2020-05-05 13:49 ` [patch V4 part 4 03/24] lib/bsearch: Provide __always_inline variant Thomas Gleixner
2020-05-14 4:58 ` Andy Lutomirski
2020-05-19 19:58 ` [tip: x86/entry] " tip-bot2 for Peter Zijlstra
2020-05-05 13:49 ` [patch V4 part 4 04/24] x86/int3: Inline bsearch() Thomas Gleixner
2020-05-14 4:58 ` Andy Lutomirski
2020-05-19 19:58 ` [tip: x86/entry] " tip-bot2 for Peter Zijlstra
2020-05-05 13:49 ` [patch V4 part 4 05/24] x86/entry: Provide IDTENTRY_RAW Thomas Gleixner
2020-05-14 4:59 ` Andy Lutomirski
2020-05-19 19:58 ` [tip: x86/entry] x86/idtentry: " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 06/24] x86/entry: Convert INT3 exception to IDTENTRY_RAW Thomas Gleixner
2020-05-14 5:01 ` Andy Lutomirski
2020-05-19 19:58 ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 07/24] x86/traps: Split int3 handler up Thomas Gleixner
2020-05-14 5:03 ` Andy Lutomirski
2020-05-14 9:39 ` Peter Zijlstra
2020-05-19 19:58 ` [tip: x86/entry] " tip-bot2 for Peter Zijlstra
2020-05-05 13:49 ` [patch V4 part 4 08/24] x86/entry: Provide IDTENTRY_IST Thomas Gleixner
2020-05-14 16:39 ` Andy Lutomirski
2020-05-14 18:44 ` Thomas Gleixner
2020-05-19 19:58 ` [tip: x86/entry] x86/idtentry: " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 09/24] x86/mce: Move nmi_enter/exit() into the entry point Thomas Gleixner
2020-05-15 5:23 ` Andy Lutomirski
2020-05-19 19:58 ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 10/24] x86/entry: Convert Machine Check to IDTENTRY_IST Thomas Gleixner
2020-05-15 5:24 ` Andy Lutomirski
2020-05-19 19:58 ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 11/24] x86/mce: Use untraced rd/wrmsr in the MCE offline/crash check Thomas Gleixner
2020-05-15 5:24 ` Andy Lutomirski
2020-05-19 19:58 ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 12/24] x86/idtentry: Provide IDTENTRY_XEN for XEN/PV Thomas Gleixner
2020-05-15 5:25 ` Andy Lutomirski
2020-05-19 19:58 ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 13/24] x86/entry: Convert NMI to IDTENTRY_NMI Thomas Gleixner
2020-05-15 5:26 ` Andy Lutomirski
2020-05-19 19:58 ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 14/24] x86/nmi: Protect NMI entry against instrumentation Thomas Gleixner
2020-05-15 5:26 ` Andy Lutomirski
2020-05-19 19:58 ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 15/24] x86/db: Split out dr6/7 handling Thomas Gleixner
2020-05-07 17:18 ` Alexandre Chartre
2020-05-08 8:59 ` Peter Zijlstra
2020-05-08 11:58 ` Thomas Gleixner
2020-05-08 12:45 ` Peter Zijlstra
2020-05-14 2:24 ` Mathieu Desnoyers
2020-05-14 17:28 ` Thomas Gleixner
2020-05-14 17:46 ` Mathieu Desnoyers
2020-05-15 14:32 ` Thomas Gleixner
2020-05-14 18:06 ` Steven Rostedt
2020-05-15 5:37 ` Andy Lutomirski
2020-05-19 19:58 ` [tip: x86/entry] " tip-bot2 for Peter Zijlstra
2020-05-05 13:49 ` [patch V4 part 4 16/24] x86/entry: Convert Debug exception to IDTENTRY_DB Thomas Gleixner
2020-05-15 5:27 ` Andy Lutomirski
2020-05-19 19:58 ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 17/24] x86/entry/64: Remove error code clearing from #DB and #MCE ASM stub Thomas Gleixner
2020-05-15 5:27 ` Andy Lutomirski
2020-05-19 19:58 ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 18/24] x86/entry: Provide IDTRENTRY_NOIST variants for #DB and #MC Thomas Gleixner
2020-05-15 5:29 ` Andy Lutomirski
2020-05-19 19:58 ` tip-bot2 for Thomas Gleixner [this message]
2020-05-05 13:49 ` [patch V4 part 4 19/24] x86/entry: Implement user mode C entry points for #DB and #MCE Thomas Gleixner
2020-05-15 5:32 ` Andy Lutomirski
2020-05-19 19:58 ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 20/24] x86/traps: Restructure #DB handling Thomas Gleixner
2020-05-15 5:39 ` Andy Lutomirski
2020-05-19 19:58 ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 21/24] x86/traps: Address objtool noinstr complaints in #DB Thomas Gleixner
2020-05-15 5:39 ` Andy Lutomirski
2020-05-19 19:58 ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 22/24] x86/mce: Address objtools noinstr complaints Thomas Gleixner
2020-05-15 5:40 ` Andy Lutomirski
2020-05-19 19:58 ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 23/24] x86/entry: Provide IDTENTRY_DF Thomas Gleixner
2020-05-15 5:41 ` Andy Lutomirski
2020-05-15 15:01 ` Thomas Gleixner
2020-05-19 19:58 ` [tip: x86/entry] x86/idtentry: " tip-bot2 for Thomas Gleixner
2020-05-19 19:58 ` [tip: x86/entry] x86/entry: Convert double fault exception to IDTENTRY_DF tip-bot2 for Thomas Gleixner
2020-05-05 13:49 ` [patch V4 part 4 24/24] " Thomas Gleixner
2020-05-07 19:55 ` Alexandre Chartre
2020-05-15 5:42 ` Andy Lutomirski
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