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book3s64/hash: Add hash_debug_pagealloc_add_slot() function

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This adds hash_debug_pagealloc_add_slot() function instead of open
coding that in htab_bolt_mapping(). This is required since we will be
separating kfence functionality to not depend upon debug_pagealloc.

No functionality change in this patch.

Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://patch.msgid.link/026f0aaa1dddd89154dc8d20ceccfca4f63ccf79.1729271995.git.ritesh.list@gmail.com
This commit is contained in:
Ritesh Harjani (IBM) 2024-10-18 22:59:45 +05:30 committed by Michael Ellerman
parent 8b1085523f
commit cc5734481b
1 changed files with 10 additions and 3 deletions
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13
arch/powerpc/mm/book3s64/hash_utils.c
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@ -328,6 +328,14 @@ static void kernel_unmap_linear_page(unsigned long vaddr, unsigned long lmi)
mmu_kernel_ssize, 0);
}
static inline void hash_debug_pagealloc_add_slot(phys_addr_t paddr, int slot)
{
if (!debug_pagealloc_enabled())
return;
if ((paddr >> PAGE_SHIFT) < linear_map_hash_count)
linear_map_hash_slots[paddr >> PAGE_SHIFT] = slot | 0x80;
}
int hash__kernel_map_pages(struct page *page, int numpages, int enable)
{
unsigned long flags, vaddr, lmi;
@ -353,6 +361,7 @@ int hash__kernel_map_pages(struct page *page, int numpages,
{
return 0;
}
static inline void hash_debug_pagealloc_add_slot(phys_addr_t paddr, int slot) {}
#endif /* CONFIG_DEBUG_PAGEALLOC */
/*
@ -513,9 +522,7 @@ int htab_bolt_mapping(unsigned long vstart, unsigned long vend,
break;
cond_resched();
if (debug_pagealloc_enabled() &&
(paddr >> PAGE_SHIFT) < linear_map_hash_count)
linear_map_hash_slots[paddr >> PAGE_SHIFT] = ret | 0x80;
hash_debug_pagealloc_add_slot(paddr, ret);
}
return ret < 0 ? ret : 0;
}