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x86/entry: Rename SYSENTER_stack to CPU_ENTRY_AREA_entry_stack

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If the kernel oopses while on the trampoline stack, it will print
"<SYSENTER>" even if SYSENTER is not involved.  That is rather confusing.

The "SYSENTER" stack is used for a lot more than SYSENTER now.  Give it a
better string to display in stack dumps, and rename the kernel code to
match.

Also move the 32-bit code over to the new naming even though it still uses
the entry stack only for SYSENTER.

Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bp@suse.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Dave Hansen
2017-12-04 17:25:07 -08:00
committed by Ingo Molnar
parent e8ffe96e59
commit 4fe2d8b11a
11 changed files with 44 additions and 38 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
arch/x86/kernel/dumpstack.c
View File

@@ -43,9 +43,9 @@ bool in_task_stack(unsigned long *stack, struct task_struct *task,
return true;
}
bool in_sysenter_stack(unsigned long *stack, struct stack_info *info)
bool in_entry_stack(unsigned long *stack, struct stack_info *info)
{
struct SYSENTER_stack *ss = cpu_SYSENTER_stack(smp_processor_id());
struct entry_stack *ss = cpu_entry_stack(smp_processor_id());
void *begin = ss;
void *end = ss + 1;
@@ -53,7 +53,7 @@ bool in_sysenter_stack(unsigned long *stack, struct stack_info *info)
if ((void *)stack < begin || (void *)stack >= end)
return false;
info->type = STACK_TYPE_SYSENTER;
info->type = STACK_TYPE_ENTRY;
info->begin = begin;
info->end = end;
info->next_sp = NULL;
@@ -111,13 +111,13 @@ void show_trace_log_lvl(struct task_struct *task, struct pt_regs *regs,
* - task stack
* - interrupt stack
* - HW exception stacks (double fault, nmi, debug, mce)
* - SYSENTER stack
* - entry stack
*
* x86-32 can have up to four stacks:
* - task stack
* - softirq stack
* - hardirq stack
* - SYSENTER stack
* - entry stack
*/
for (regs = NULL; stack; stack = PTR_ALIGN(stack_info.next_sp, sizeof(long))) {
const char *stack_name;