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powerpc/64s: Replace CONFIG_PPC_STD_MMU_64 with CONFIG_PPC_BOOK3S_64

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CONFIG_PPC_STD_MMU_64 indicates support for the "standard" powerpc MMU
on 64-bit CPUs. The "standard" MMU refers to the hash page table MMU
found in "server" processors, from IBM mainly.

Currently CONFIG_PPC_STD_MMU_64 is == CONFIG_PPC_BOOK3S_64. While it's
annoying to have two symbols that always have the same value, it's not
quite annoying enough to bother removing one.

However with the arrival of Power9, we now have the situation where
CONFIG_PPC_STD_MMU_64 is enabled, but the kernel is running using the
Radix MMU - *not* the "standard" MMU. So it is now actively confusing
to use it, because it implies that code is disabled or inactive when
the Radix MMU is in use, however that is not necessarily true.

So s/CONFIG_PPC_STD_MMU_64/CONFIG_PPC_BOOK3S_64/, and do some minor
formatting updates of some of the affected lines.

This will be a pain for backports, but c'est la vie.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Michael Ellerman
2017-10-19 15:08:43 +11:00
parent c1807e3f84
commit 4e00374704
26 changed files with 68 additions and 72 deletions
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12
arch/powerpc/kernel/paca.c
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@@ -90,7 +90,7 @@ static inline void free_lppacas(void) { }
#endif /* CONFIG_PPC_BOOK3S */
#ifdef CONFIG_PPC_STD_MMU_64
#ifdef CONFIG_PPC_BOOK3S_64
/*
* 3 persistent SLBs are registered here. The buffer will be zero
@@ -135,11 +135,11 @@ static struct slb_shadow * __init init_slb_shadow(int cpu)
return s;
}
#else /* CONFIG_PPC_STD_MMU_64 */
#else /* !CONFIG_PPC_BOOK3S_64 */
static void __init allocate_slb_shadows(int nr_cpus, int limit) { }
#endif /* CONFIG_PPC_STD_MMU_64 */
#endif /* CONFIG_PPC_BOOK3S_64 */
/* The Paca is an array with one entry per processor. Each contains an
* lppaca, which contains the information shared between the
@@ -170,9 +170,9 @@ void __init initialise_paca(struct paca_struct *new_paca, int cpu)
new_paca->kexec_state = KEXEC_STATE_NONE;
new_paca->__current = &init_task;
new_paca->data_offset = 0xfeeeeeeeeeeeeeeeULL;
#ifdef CONFIG_PPC_STD_MMU_64
#ifdef CONFIG_PPC_BOOK3S_64
new_paca->slb_shadow_ptr = init_slb_shadow(cpu);
#endif /* CONFIG_PPC_STD_MMU_64 */
#endif
#ifdef CONFIG_PPC_BOOK3E
/* For now -- if we have threads this will be adjusted later */
@@ -271,7 +271,7 @@ void copy_mm_to_paca(struct mm_struct *mm)
get_paca()->mm_ctx_user_psize = context->user_psize;
get_paca()->mm_ctx_sllp = context->sllp;
#endif
#else /* CONFIG_PPC_BOOK3S */
#else /* !CONFIG_PPC_BOOK3S */
return;
#endif
}