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powerpc/e500: switch to 64 bits PGD on 85xx (32 bits)

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At the time being when CONFIG_PTE_64BIT is selected, PTE entries are 64
bits but PGD entries are still 32 bits.

In order to allow leaf PMD entries, switch the PGD to 64 bits entries.

Link: https://lkml.kernel.org/r/ca85397df02564e5edc3a3c27b55cf43af3e4ef3.1719928057.git.christophe.leroy@csgroup.eu
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Peter Xu <peterx@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Christophe Leroy 2024-07-02 15:51:28 +02:00 committed by Andrew Morton
parent e081c14744
commit 6b0e82791b
2 changed files with 10 additions and 4 deletions
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4
arch/powerpc/include/asm/pgtable-types.h
View File

@ -49,7 +49,11 @@ static inline unsigned long pud_val(pud_t x)
#endif /* CONFIG_PPC64 */
/* PGD level */
#if defined(CONFIG_PPC_E500) && defined(CONFIG_PTE_64BIT)
typedef struct { unsigned long long pgd; } pgd_t;
#else
typedef struct { unsigned long pgd; } pgd_t;
#endif
#define __pgd(x) ((pgd_t) { (x) })
static inline unsigned long pgd_val(pgd_t x)
{

10
arch/powerpc/kernel/head_85xx.S
View File

@ -307,8 +307,9 @@ set_ivor:
#ifdef CONFIG_PTE_64BIT
#ifdef CONFIG_HUGETLB_PAGE
#define FIND_PTE \
rlwinm r12, r10, 13, 19, 29; /* Compute pgdir/pmd offset */ \
lwzx r11, r12, r11; /* Get pgd/pmd entry */ \
rlwinm r12, r10, 14, 18, 28; /* Compute pgdir/pmd offset */ \
add r12, r11, r12; \
lwz r11, 4(r12); /* Get pgd/pmd entry */ \
rlwinm. r12, r11, 0, 0, 20; /* Extract pt base address */ \
blt 1000f; /* Normal non-huge page */ \
beq 2f; /* Bail if no table */ \
@ -321,8 +322,9 @@ set_ivor:
1001: lwz r11, 4(r12); /* Get pte entry */
#else
#define FIND_PTE \
rlwinm r12, r10, 13, 19, 29; /* Compute pgdir/pmd offset */ \
lwzx r11, r12, r11; /* Get pgd/pmd entry */ \
rlwinm r12, r10, 14, 18, 28; /* Compute pgdir/pmd offset */ \
add r12, r11, r12; \
lwz r11, 4(r12); /* Get pgd/pmd entry */ \
rlwinm. r12, r11, 0, 0, 20; /* Extract pt base address */ \
beq 2f; /* Bail if no table */ \
rlwimi r12, r10, 23, 20, 28; /* Compute pte address */ \