[PATCH 67/70] x86/head/64: Rename start_cpu0

Joerg Roedel
2020-03-19T09:15:46Z

From: Joerg Roedel <jroedel@suse.de>

For SEV-ES this entry point will be used for restarting APs after they
have been offlined. Remove the '0' from the name to reflect that.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
arch/x86/include/asm/cpu.h | 2 +-
arch/x86/kernel/head_32.S | 4 ++--
arch/x86/kernel/head_64.S | 6 +++---
arch/x86/kernel/smpboot.c | 4 ++--
4 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/x86/include/asm/cpu.h b/arch/x86/include/asm/cpu.h
index adc6cc86b062..00668daf8991 100644
--- a/arch/x86/include/asm/cpu.h
+++ b/arch/x86/include/asm/cpu.h
@@ -29,7 +29,7 @@ struct x86_cpu {
#ifdef CONFIG_HOTPLUG_CPU
extern int arch_register_cpu(int num);
extern void arch_unregister_cpu(int);
-extern void start_cpu0(void);
+extern void start_cpu(void);
#ifdef CONFIG_DEBUG_HOTPLUG_CPU0
extern int _debug_hotplug_cpu(int cpu, int action);
#endif
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
index 3923ab4630d7..1a280152bd10 100644
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -180,12 +180,12 @@ SYM_CODE_END(startup_32)
* up already except stack. We just set up stack here. Then call
* start_secondary().
*/
-SYM_FUNC_START(start_cpu0)
+SYM_FUNC_START(start_cpu)
movl initial_stack, %ecx
movl %ecx, %esp
call *(initial_code)
1: jmp 1b
-SYM_FUNC_END(start_cpu0)
+SYM_FUNC_END(start_cpu)
#endif

/*
diff --git a/arch/x86/kernel/head_64.S b/arch/x86/kernel/head_64.S
index c935d6d07393..f2e793213fa7 100644
--- a/arch/x86/kernel/head_64.S
+++ b/arch/x86/kernel/head_64.S
@@ -299,15 +299,15 @@ SYM_CODE_END(secondary_startup_64)

#ifdef CONFIG_HOTPLUG_CPU
/*
- * Boot CPU0 entry point. It's called from play_dead(). Everything has been set
+ * CPU entry point. It's called from play_dead(). Everything has been set
* up already except stack. We just set up stack here. Then call
* start_secondary() via .Ljump_to_C_code.
*/
-SYM_CODE_START(start_cpu0)
+SYM_CODE_START(start_cpu)
UNWIND_HINT_EMPTY
movq initial_stack(%rip), %rsp
jmp .Ljump_to_C_code
-SYM_CODE_END(start_cpu0)
+SYM_CODE_END(start_cpu)
#endif

/* Both SMP bootup and ACPI suspend change these variables */
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 69881b2d446c..19aa18f1e307 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1717,7 +1717,7 @@ static inline void mwait_play_dead(void)
* If NMI wants to wake up CPU0, start CPU0.
*/
if (wakeup_cpu0())
- start_cpu0();
+ start_cpu();
}
}

@@ -1732,7 +1732,7 @@ void hlt_play_dead(void)
* If NMI wants to wake up CPU0, start CPU0.
*/
if (wakeup_cpu0())
- start_cpu0();
+ start_cpu();
}
}

--
2.17.1