linux-kernel - [PATCH 4/6] x86/irq: merge common code in DEFINE_IDTENTRY_SYSVEC[

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Mon, 10 May 2021 17:55:29 -0700
From:   "H. Peter Anvin" <hpa@...or.com>
To:     Ingo Molnar <mingo@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        Andy Lutomirski <luto@...nel.org>
Cc:     Steve Wahl <steve.wahl@....com>, Mike Travis <mike.travis@....com>,
        Dimitri Sivanich <dimitri.sivanich@....com>,
        Russ Anderson <russ.anderson@....com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "H. Peter Anvin (Intel)" <hpa@...or.com>
Subject: [PATCH 4/6] x86/irq: merge common code in DEFINE_IDTENTRY_SYSVEC[_SIMPLE]

From: "H. Peter Anvin (Intel)" <hpa@...or.com>

Move the common code in DEFINE_IDTENTRY_SYSVEC[_SIMPLE] into a common
macro.

Signed-off-by: H. Peter Anvin (Intel) <hpa@...or.com>
---
 arch/x86/include/asm/idtentry.h | 35 ++++++++++++++++++---------------
 1 file changed, 19 insertions(+), 16 deletions(-)

diff --git a/arch/x86/include/asm/idtentry.h b/arch/x86/include/asm/idtentry.h
index c03a18cac78e..de3727db021a 100644
--- a/arch/x86/include/asm/idtentry.h
+++ b/arch/x86/include/asm/idtentry.h
@@ -219,6 +219,23 @@ static noinline void __##func(struct pt_regs *regs, u32 vector)
 #define DECLARE_IDTENTRY_SYSVEC(vector, func)				\
 	DECLARE_IDTENTRY(vector, func)
 
+/**
+ * IDTENTRY_INVOKE_SYSVEC - Common code for system vector IDT entry points
+ * @what:	What should be called
+ *
+ * Common code for DEFINE_IDTENTRY_SYSVEC and _SYSVEC_SIMPLE
+ */
+#define IDTENTRY_INVOKE_SYSVEC(what)					\
+do {									\
+	irqentry_state_t state = irqentry_enter(regs);			\
+									\
+	instrumentation_begin();					\
+	kvm_set_cpu_l1tf_flush_l1d();					\
+	what;								\
+	instrumentation_end();						\
+	irqentry_exit(regs, state);					\
+} while (0)								\
+
 /**
  * DEFINE_IDTENTRY_SYSVEC - Emit code for system vector IDT entry points
  * @func:	Function name of the entry point
@@ -233,13 +250,7 @@ static void __##func(struct pt_regs *regs);				\
 									\
 __visible noinstr void func(struct pt_regs *regs)			\
 {									\
-	irqentry_state_t state = irqentry_enter(regs);			\
-									\
-	instrumentation_begin();					\
-	kvm_set_cpu_l1tf_flush_l1d();					\
-	run_sysvec_on_irqstack_cond(__##func, regs);			\
-	instrumentation_end();						\
-	irqentry_exit(regs, state);					\
+	IDTENTRY_INVOKE_SYSVEC(run_sysvec_on_irqstack_cond(__##func, regs)); \
 }									\
 									\
 static noinline void __##func(struct pt_regs *regs)
@@ -260,15 +271,7 @@ static __always_inline void __##func(struct pt_regs *regs);		\
 									\
 __visible noinstr void func(struct pt_regs *regs)			\
 {									\
-	irqentry_state_t state = irqentry_enter(regs);			\
-									\
-	instrumentation_begin();					\
-	__irq_enter_raw();						\
-	kvm_set_cpu_l1tf_flush_l1d();					\
-	__##func (regs);						\
-	__irq_exit_raw();						\
-	instrumentation_end();						\
-	irqentry_exit(regs, state);					\
+	IDTENTRY_INVOKE_SYSVEC(__irq_enter_raw(); __##func(regs); __irq_exit_raw()); \
 }									\
 									\
 static __always_inline void __##func(struct pt_regs *regs)
-- 
2.31.1