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Merge tag 'powerpc-5.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

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Pull powerpc fixes from Michael Ellerman:

 - One fix for the interrupt rework we did last release which broke
   KVM-PR

 - Three commits fixing some fallout from the READ_ONCE() changes
   interacting badly with our 8xx 16K pages support, which uses a pte_t
   that is a structure of 4 actual PTEs

 - A cleanup of the 8xx pte_update() to use the newly added pmd_off()

 - A fix for a crash when handling an oops if CONFIG_DEBUG_VIRTUAL is
   enabled

 - A minor fix for the SPU syscall generation

Thanks to Aneesh Kumar K.V, Christian Zigotzky, Christophe Leroy, Mike
Rapoport, Nicholas Piggin.

* tag 'powerpc-5.8-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/8xx: Provide ptep_get() with 16k pages
  mm: Allow arches to provide ptep_get()
  mm/gup: Use huge_ptep_get() in gup_hugepte()
  powerpc/syscalls: Use the number when building SPU syscall table
  powerpc/8xx: use pmd_off() to access a PMD entry in pte_update()
  powerpc/64s: Fix KVM interrupt using wrong save area
  powerpc: Fix kernel crash in show_instructions() w/DEBUG_VIRTUAL
This commit is contained in:
Linus Torvalds
2020-06-21 10:02:53 -07:00
parent 93bbca271a c0e1c8c22b
commit 7561393908
7 changed files with 37 additions and 20 deletions
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18
arch/powerpc/include/asm/nohash/32/pgtable.h
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@@ -205,10 +205,6 @@ static inline void pmd_clear(pmd_t *pmdp)
*pmdp = __pmd(0);
}
/* to find an entry in a page-table-directory */
#define pgd_index(address) ((address) >> PGDIR_SHIFT)
#define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
/*
* PTE updates. This function is called whenever an existing
* valid PTE is updated. This does -not- include set_pte_at()
@@ -230,6 +226,8 @@ static inline void pmd_clear(pmd_t *pmdp)
* For other page sizes, we have a single entry in the table.
*/
#ifdef CONFIG_PPC_8xx
static pmd_t *pmd_off(struct mm_struct *mm, unsigned long addr);
static inline pte_basic_t pte_update(struct mm_struct *mm, unsigned long addr, pte_t *p,
unsigned long clr, unsigned long set, int huge)
{
@@ -237,7 +235,7 @@ static inline pte_basic_t pte_update(struct mm_struct *mm, unsigned long addr, p
pte_basic_t old = pte_val(*p);
pte_basic_t new = (old & ~(pte_basic_t)clr) | set;
int num, i;
pmd_t *pmd = pmd_offset(pud_offset(p4d_offset(pgd_offset(mm, addr), addr), addr), addr);
pmd_t *pmd = pmd_off(mm, addr);
if (!huge)
num = PAGE_SIZE / SZ_4K;
@@ -286,6 +284,16 @@ static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
return __pte(pte_update(mm, addr, ptep, ~0, 0, 0));
}
#if defined(CONFIG_PPC_8xx) && defined(CONFIG_PPC_16K_PAGES)
#define __HAVE_ARCH_PTEP_GET
static inline pte_t ptep_get(pte_t *ptep)
{
pte_t pte = {READ_ONCE(ptep->pte), 0, 0, 0};
return pte;
}
#endif
#define __HAVE_ARCH_PTEP_SET_WRPROTECT
static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
pte_t *ptep)