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x86/entry: Convert Debug exception to IDTENTRY_DB

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Convert #DB to IDTENTRY_ERRORCODE:
  - Implement the C entry point with DEFINE_IDTENTRY_DB
  - Emit the ASM stub with DECLARE_IDTENTRY
  - Remove the ASM idtentry in 64bit
  - Remove the open coded ASM entry code in 32bit
  - Fixup the XEN/PV code
  - Remove the old prototypes

No functional change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/20200505135314.900297476@linutronix.de
This commit is contained in:
Thomas Gleixner
2020-02-25 23:33:26 +01:00
parent 9f58fdde95
commit 2bbc68f837
8 changed files with 24 additions and 30 deletions
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2
arch/x86/xen/enlighten_pv.c
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@@ -615,7 +615,7 @@ struct trap_array_entry {
.ist_okay = ist_ok }
static struct trap_array_entry trap_array[] = {
{ debug, xen_xendebug, true },
TRAP_ENTRY_REDIR(exc_debug, exc_xendebug, true ),
{ double_fault, xen_double_fault, true },
#ifdef CONFIG_X86_MCE
TRAP_ENTRY(exc_machine_check, true ),