diff options
| author | Juergen Gross <jgross@suse.com> | 2021-01-20 14:55:42 +0100 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2021-02-10 12:07:10 +0100 |
| commit | c3d7fa6684b5b3a07a48fc379d27bfb8a96661d9 (patch) | |
| tree | 37a18039a769b210f539b315362a56dada1d674e /arch/x86/xen | |
| parent | 92bf22614b21a2706f4993b278017e437f7785b3 (diff) | |
x86/xen: Use specific Xen pv interrupt entry for MCE
Xen PV guests don't use IST. For machine check interrupts, switch to the
same model as debug interrupts.
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210120135555.32594-3-jgross@suse.com
Diffstat (limited to 'arch/x86/xen')
| -rw-r--r-- | arch/x86/xen/enlighten_pv.c | 16 | ||||
| -rw-r--r-- | arch/x86/xen/xen-asm.S | 2 |
2 files changed, 16 insertions, 2 deletions
diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c index 9a5a50cdaab5..9db1d31bd59f 100644 --- a/arch/x86/xen/enlighten_pv.c +++ b/arch/x86/xen/enlighten_pv.c @@ -590,6 +590,20 @@ DEFINE_IDTENTRY_RAW(exc_xen_unknown_trap) BUG(); } +#ifdef CONFIG_X86_MCE +DEFINE_IDTENTRY_RAW(xenpv_exc_machine_check) +{ + /* + * There's no IST on Xen PV, but we still need to dispatch + * to the correct handler. + */ + if (user_mode(regs)) + noist_exc_machine_check(regs); + else + exc_machine_check(regs); +} +#endif + struct trap_array_entry { void (*orig)(void); void (*xen)(void); @@ -610,7 +624,7 @@ static struct trap_array_entry trap_array[] = { TRAP_ENTRY_REDIR(exc_debug, true ), TRAP_ENTRY(exc_double_fault, true ), #ifdef CONFIG_X86_MCE - TRAP_ENTRY(exc_machine_check, true ), + TRAP_ENTRY_REDIR(exc_machine_check, true ), #endif TRAP_ENTRY_REDIR(exc_nmi, true ), TRAP_ENTRY(exc_int3, false ), diff --git a/arch/x86/xen/xen-asm.S b/arch/x86/xen/xen-asm.S index 53cf8aa35032..cd330ce47b82 100644 --- a/arch/x86/xen/xen-asm.S +++ b/arch/x86/xen/xen-asm.S @@ -172,7 +172,7 @@ xen_pv_trap asm_exc_spurious_interrupt_bug xen_pv_trap asm_exc_coprocessor_error xen_pv_trap asm_exc_alignment_check #ifdef CONFIG_X86_MCE -xen_pv_trap asm_exc_machine_check +xen_pv_trap asm_xenpv_exc_machine_check #endif /* CONFIG_X86_MCE */ xen_pv_trap asm_exc_simd_coprocessor_error #ifdef CONFIG_IA32_EMULATION |