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powerpc fixes for 4.5 #3

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- eeh: Fix partial hotplug criterion from Gavin Shan
  - mm: Clear the invalid slot information correctly from Aneesh Kumar K.V
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Merge tag 'powerpc-4.5-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 - eeh: Fix partial hotplug criterion from Gavin Shan
 - mm: Clear the invalid slot information correctly from Aneesh Kumar K.V

* tag 'powerpc-4.5-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/mm/hash: Clear the invalid slot information correctly
  powerpc/eeh: Fix partial hotplug criterion
This commit is contained in:
Linus Torvalds 2016-02-25 19:41:53 -08:00
commit 9aca90a7ca
3 changed files with 19 additions and 4 deletions
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3
arch/powerpc/kernel/eeh_driver.c
View File

@ -418,8 +418,7 @@ static void *eeh_rmv_device(void *data, void *userdata)
eeh_pcid_put(dev);
if (driver->err_handler &&
driver->err_handler->error_detected &&
driver->err_handler->slot_reset &&
driver->err_handler->resume)
driver->err_handler->slot_reset)
return NULL;
}

8
arch/powerpc/mm/hash64_64k.c
View File

@ -111,7 +111,13 @@ int __hash_page_4K(unsigned long ea, unsigned long access, unsigned long vsid,
*/
if (!(old_pte & _PAGE_COMBO)) {
flush_hash_page(vpn, rpte, MMU_PAGE_64K, ssize, flags);
old_pte &= ~_PAGE_HASHPTE | _PAGE_F_GIX | _PAGE_F_SECOND;
/*
* clear the old slot details from the old and new pte.
* On hash insert failure we use old pte value and we don't
* want slot information there if we have a insert failure.
*/
old_pte &= ~(_PAGE_HASHPTE | _PAGE_F_GIX | _PAGE_F_SECOND);
new_pte &= ~(_PAGE_HASHPTE | _PAGE_F_GIX | _PAGE_F_SECOND);
goto htab_insert_hpte;
}
/*

12
arch/powerpc/mm/hugepage-hash64.c
View File

@ -78,9 +78,19 @@ int __hash_page_thp(unsigned long ea, unsigned long access, unsigned long vsid,
* base page size. This is because demote_segment won't flush
* hash page table entries.
*/
if ((old_pmd & _PAGE_HASHPTE) && !(old_pmd & _PAGE_COMBO))
if ((old_pmd & _PAGE_HASHPTE) && !(old_pmd & _PAGE_COMBO)) {
flush_hash_hugepage(vsid, ea, pmdp, MMU_PAGE_64K,
ssize, flags);
/*
* With THP, we also clear the slot information with
* respect to all the 64K hash pte mapping the 16MB
* page. They are all invalid now. This make sure we
* don't find the slot valid when we fault with 4k
* base page size.
*
*/
memset(hpte_slot_array, 0, PTE_FRAG_SIZE);
}
}
valid = hpte_valid(hpte_slot_array, index);