Re: [PATCH 1/2] powerpc/asm-offset: Remove unused items related to paca

[Christophe Leroy]

Le 04/05/2021 à 12:40, Christophe Leroy a écrit :
> Le 04/05/2021 à 12:14, Nicholas Piggin a écrit :
> > Excerpts from Christophe Leroy's message of May 4, 2021 2:46 am:
> > > PACA_SIZE, PACACONTEXTID, PACALOWSLICESPSIZE, PACAHIGHSLICEPSIZE,
> > > PACA_SLB_ADDR_LIMIT, MMUPSIZEDEFSIZE, PACASLBCACHE, PACASLBCACHEPTR,
> > > PACASTABRR, PACAVMALLOCSLLP, MMUPSIZESLLP, PACACONTEXTSLLP,
> > > PACALPPACAPTR, LPPACA_DTLIDX and PACA_DTL_RIDX are not used anymore
> > > by ASM code.
> >
> > Reviewed-by: Nicholas Piggin <npiggin@xxxxxxxxx>
> >
> > Also I think SIGSEGV, NMI_MASK, THREAD_DBCR0, KUAP?, TI_FLAGS,
> > TI_PREEMPT, [ID]CACHEL1*, STACK_REGS_KUAP, EXC_LVL_SIZE, KVM_NEED_FLUSH,
> > KVM_FWNMI, VCPU_DEC, VCPU_SPMC, HSTATE_XICS_PHYS, HSTATE_SAVED_XIRR,
> > PPC_DBELL_MSGTYPE I think. While we're cleaning it up.
>
> Yes, thanks for checking.
>
> I think we can safely remove KUAP.
>
> But we can't remove EXC_LVL_SIZE, it is used in kernel/head_booke.h which is probably included in 
> head_44x.S and head_fsl_booke.S

DCACHEL1*BLOCKSIZE are also still used.

Christophe


> Christophe