xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

powerpc/64s: Replace CONFIG_PPC_STD_MMU_64 with CONFIG_PPC_BOOK3S_64

Browse Source 
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
Download Patch File Download Diff File Expand all files Collapse all files

10
arch/powerpc/mm/dump_linuxpagetables.c
View File

@@ -112,7 +112,7 @@ struct flag_info {
static const struct flag_info flag_array[] = {
{
#ifdef CONFIG_PPC_STD_MMU_64
#ifdef CONFIG_PPC_BOOK3S_64
.mask = _PAGE_PRIVILEGED,
.val = 0,
#else
@@ -147,7 +147,7 @@ static const struct flag_info flag_array[] = {
.set = "present",
.clear = " ",
}, {
#ifdef CONFIG_PPC_STD_MMU_64
#ifdef CONFIG_PPC_BOOK3S_64
.mask = H_PAGE_HASHPTE,
.val = H_PAGE_HASHPTE,
#else
@@ -157,7 +157,7 @@ static const struct flag_info flag_array[] = {
.set = "hpte",
.clear = " ",
}, {
#ifndef CONFIG_PPC_STD_MMU_64
#ifndef CONFIG_PPC_BOOK3S_64
.mask = _PAGE_GUARDED,
.val = _PAGE_GUARDED,
.set = "guarded",
@@ -174,7 +174,7 @@ static const struct flag_info flag_array[] = {
.set = "accessed",
.clear = " ",
}, {
#ifndef CONFIG_PPC_STD_MMU_64
#ifndef CONFIG_PPC_BOOK3S_64
.mask = _PAGE_WRITETHRU,
.val = _PAGE_WRITETHRU,
.set = "write through",
@@ -450,7 +450,7 @@ static void populate_markers(void)
address_markers[i++].start_address = PHB_IO_END;
address_markers[i++].start_address = IOREMAP_BASE;
address_markers[i++].start_address = IOREMAP_END;
#ifdef CONFIG_PPC_STD_MMU_64
#ifdef CONFIG_PPC_BOOK3S_64
address_markers[i++].start_address = H_VMEMMAP_BASE;
#else
address_markers[i++].start_address = VMEMMAP_BASE;