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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
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8
arch/x86/include/asm/fixmap.h
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@@ -56,10 +56,10 @@ struct cpu_entry_area {
char gdt[PAGE_SIZE];
/*
* The GDT is just below SYSENTER_stack and thus serves (on x86_64) as
* The GDT is just below entry_stack and thus serves (on x86_64) as
* a a read-only guard page.
*/
struct SYSENTER_stack_page SYSENTER_stack_page;
struct entry_stack_page entry_stack_page;
/*
* On x86_64, the TSS is mapped RO. On x86_32, it's mapped RW because
@@ -250,9 +250,9 @@ static inline struct cpu_entry_area *get_cpu_entry_area(int cpu)
return (struct cpu_entry_area *)__fix_to_virt(__get_cpu_entry_area_page_index(cpu, 0));
}
static inline struct SYSENTER_stack *cpu_SYSENTER_stack(int cpu)
static inline struct entry_stack *cpu_entry_stack(int cpu)
{
return &get_cpu_entry_area(cpu)->SYSENTER_stack_page.stack;
return &get_cpu_entry_area(cpu)->entry_stack_page.stack;
}
#endif /* !__ASSEMBLY__ */