long hmi_exception_realmode(struct pt_regs *regs)
{
__this_cpu_inc(irq_stat.hmi_exceptions);
wait_for_subcore_guest_exit();
if (ppc_md.hmi_exception_early)
ppc_md.hmi_exception_early(regs);
wait_for_tb_resync();
return 0;
}
long hmi_exception_realmode(struct pt_regs *regs)
{
__this_cpu_inc(irq_stat.hmi_exceptions);
#ifdef CONFIG_PPC_BOOK3S_64
/* Workaround for P9 vector CI loads (see p9_hmi_special_emu) */
if (pvr_version_is(PVR_POWER9)) {
unsigned long hmer = mfspr(SPRN_HMER);
/* Do we have the debug bit set */
if (hmer & PPC_BIT(17)) {
hmer &= ~PPC_BIT(17);
mtspr(SPRN_HMER, hmer);
/*
* Now to avoid problems with soft-disable we
* only do the emulation if we are coming from
* user space
*/
if (user_mode(regs))
local_paca->hmi_p9_special_emu = 1;
/*
* Don't bother going to OPAL if that's the
* only relevant bit.
*/
if (!(hmer & mfspr(SPRN_HMEER)))
return local_paca->hmi_p9_special_emu;
}
}
#endif /* CONFIG_PPC_BOOK3S_64 */
wait_for_subcore_guest_exit();
if (ppc_md.hmi_exception_early)
ppc_md.hmi_exception_early(regs);
wait_for_tb_resync();
return 1;
}
