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From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: x86@kernel.org, Steven Rostedt <rostedt@goodmis.org>,
	Brian Gerst <brgerst@gmail.com>, Juergen Gross <jgross@suse.com>,
	Frederic Weisbecker <frederic@kernel.org>,
	Alexandre Chartre <alexandre.chartre@oracle.com>
Subject: [patch part-III V2 14/23] x86/entry: Provide IDTENTRY_ERRORCODE
Date: Mon, 09 Mar 2020 00:14:24 +0100	[thread overview]
Message-ID: <20200308231719.826515681@linutronix.de> (raw)
In-Reply-To: 20200308231410.905396057@linutronix.de

From: Thomas Gleixner <tglx@linutronix.de>

Same as IDTENTRY but the C entry point has an error code argument.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

---
 arch/x86/include/asm/idtentry.h |   45 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

--- a/arch/x86/include/asm/idtentry.h
+++ b/arch/x86/include/asm/idtentry.h
@@ -72,6 +72,48 @@ NOKPROBE_SYMBOL(func);							\
 									\
 static __always_inline void __##func(struct pt_regs *regs)
 
+/**
+ * DECLARE_IDTENTRY_ERRORCODE - Declare functions for simple IDT entry points
+ *				Error code pushed by hardware
+ * @vector:	Vector number (ignored for C)
+ * @func:	Function name of the entry point
+ *
+ * Declares three functions:
+ * - The ASM entry point: asm_##func
+ * - The XEN PV trap entry point: xen_##func (maybe unused)
+ * - The C handler called from the ASM entry point
+ *
+ * Same as DECLARE_IDTENTRY, but has an extra error_code argument for the
+ * C-handler.
+ */
+#define DECLARE_IDTENTRY_ERRORCODE(vector, func)			\
+	asmlinkage void asm_##func(void);				\
+	asmlinkage void xen_asm_##func(void);				\
+	__visible void func(struct pt_regs *regs, unsigned long error_code)
+
+/**
+ * DEFINE_IDTENTRY_ERRORCODE - Emit code for simple IDT entry points
+ *			       Error code pushed by hardware
+ * @func:	Function name of the entry point
+ *
+ * Same as DEFINE_IDTENTRY, but has an extra error_code argument
+ */
+#define DEFINE_IDTENTRY_ERRORCODE(func)					\
+static __always_inline void __##func(struct pt_regs *regs,		\
+				     unsigned long error_code);		\
+									\
+__visible notrace void func(struct pt_regs *regs,			\
+			    unsigned long error_code)			\
+{									\
+	idtentry_enter(regs);						\
+	__##func (regs, error_code);					\
+	idtentry_exit(regs);						\
+}									\
+NOKPROBE_SYMBOL(func);							\
+									\
+static __always_inline void __##func(struct pt_regs *regs,		\
+				     unsigned long error_code)
+
 #else /* !__ASSEMBLY__ */
 
 /*
@@ -80,6 +122,9 @@ static __always_inline void __##func(str
 #define DECLARE_IDTENTRY(vector, func)					\
 	idtentry vector asm_##func func has_error_code=0
 
+#define DECLARE_IDTENTRY_ERRORCODE(vector, func)			\
+	idtentry vector asm_##func func has_error_code=1
+
 #endif /* __ASSEMBLY__ */
 
 /*


  parent reply	other threads:[~2020-03-08 23:25 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-08 23:14 [patch part-III V2 00/23] x86/entry: Consolidation - Part III (simple exceptions) Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 01/23] x86/traps: Split trap numbers out in a seperate header Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 02/23] x86/entry/64: Avoid pointless code when CONTEXT_TRACKING=n Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 03/23] x86/entry/64: Reorder idtentries Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 04/23] x86/entry: Distangle idtentry Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 05/23] x86/entry/32: Provide macro to emit IDT entry stubs Thomas Gleixner
2020-03-09  5:08   ` Brian Gerst
2020-03-09  7:01     ` Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 06/23] x86/idtentry: Provide macros to define/declare IDT entry points Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 07/23] x86/traps: Prepare for using DEFINE_IDTENTRY Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 08/23] x86/entry: Convert Divide Error to IDTENTRY Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 09/23] x86/entry: Convert Overflow exception " Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 10/23] x86/entry: Convert Bounds " Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 11/23] x86/entry: Convert Invalid Opcode " Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 12/23] x86/entry: Convert Device not available " Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 13/23] x86/entry: Convert Coprocessor segment overrun " Thomas Gleixner
2020-03-08 23:14 ` Thomas Gleixner [this message]
2020-03-08 23:14 ` [patch part-III V2 15/23] x86/entry: Convert Invalid TSS " Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 16/23] x86/entry: Convert Segment not present " Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 17/23] x86/entry: Convert Stack segment " Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 18/23] x86/entry: Convert General protection " Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 19/23] x86/entry: Convert Spurious interrupt bug " Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 20/23] x86/entry: Convert Coprocessor error " Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 21/23] x86/entry: Convert Alignment check " Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 22/23] x86/entry: Convert SIMD coprocessor error " Thomas Gleixner
2020-03-08 23:14 ` [patch part-III V2 23/23] x86/entry/32: Convert IRET exception to IDTENTRY_SW Thomas Gleixner
2020-03-09  9:32 ` [patch part-III V2 00/23] x86/entry: Consolidation - Part III (simple exceptions) Jürgen Groß

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