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powerpc/nohash: Move 8xx version of pte_update() into pte-8xx.h

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No point in having 8xx special pte_update() in common header,
move it into pte-8xx.h

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/17e209b1a1a43ed219e9e1f2947ec594ed4f9394.1695659959.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy 2023-09-25 20:31:24 +02:00 committed by Michael Ellerman
parent 7835006979
commit 4c1a89d983
2 changed files with 58 additions and 56 deletions
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57
arch/powerpc/include/asm/nohash/32/pgtable.h
View File

@ -219,63 +219,8 @@ static inline void pmd_clear(pmd_t *pmdp)
* that an executable user mapping was modified, which is needed
* to properly flush the virtually tagged instruction cache of
* those implementations.
*
* On the 8xx, the page tables are a bit special. For 16k pages, we have
* 4 identical entries. For 512k pages, we have 128 entries as if it was
* 4k pages, but they are flagged as 512k pages for the hardware.
* 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 int hugepd_ok(hugepd_t hpd);
static int number_of_cells_per_pte(pmd_t *pmd, pte_basic_t val, int huge)
{
if (!huge)
return PAGE_SIZE / SZ_4K;
else if (hugepd_ok(*((hugepd_t *)pmd)))
return 1;
else if (IS_ENABLED(CONFIG_PPC_4K_PAGES) && !(val & _PAGE_HUGE))
return SZ_16K / SZ_4K;
else
return SZ_512K / SZ_4K;
}
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)
{
pte_basic_t *entry = (pte_basic_t *)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_off(mm, addr);
num = number_of_cells_per_pte(pmd, new, huge);
for (i = 0; i < num; i += PAGE_SIZE / SZ_4K, new += PAGE_SIZE) {
*entry++ = new;
if (IS_ENABLED(CONFIG_PPC_16K_PAGES) && num != 1) {
*entry++ = new;
*entry++ = new;
*entry++ = new;
}
}
return old;
}
#ifdef CONFIG_PPC_16K_PAGES
#define ptep_get ptep_get
static inline pte_t ptep_get(pte_t *ptep)
{
pte_basic_t val = READ_ONCE(ptep->pte);
pte_t pte = {val, val, val, val};
return pte;
}
#endif /* CONFIG_PPC_16K_PAGES */
#else
#ifndef pte_update
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)
{

57
arch/powerpc/include/asm/nohash/32/pte-8xx.h
View File

@ -187,6 +187,63 @@ static inline unsigned long pte_leaf_size(pte_t pte)
#define pte_leaf_size pte_leaf_size
/*
* On the 8xx, the page tables are a bit special. For 16k pages, we have
* 4 identical entries. For 512k pages, we have 128 entries as if it was
* 4k pages, but they are flagged as 512k pages for the hardware.
* For other page sizes, we have a single entry in the table.
*/
static pmd_t *pmd_off(struct mm_struct *mm, unsigned long addr);
static int hugepd_ok(hugepd_t hpd);
static inline int number_of_cells_per_pte(pmd_t *pmd, pte_basic_t val, int huge)
{
if (!huge)
return PAGE_SIZE / SZ_4K;
else if (hugepd_ok(*((hugepd_t *)pmd)))
return 1;
else if (IS_ENABLED(CONFIG_PPC_4K_PAGES) && !(val & _PAGE_HUGE))
return SZ_16K / SZ_4K;
else
return SZ_512K / SZ_4K;
}
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)
{
pte_basic_t *entry = (pte_basic_t *)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_off(mm, addr);
num = number_of_cells_per_pte(pmd, new, huge);
for (i = 0; i < num; i += PAGE_SIZE / SZ_4K, new += PAGE_SIZE) {
*entry++ = new;
if (IS_ENABLED(CONFIG_PPC_16K_PAGES) && num != 1) {
*entry++ = new;
*entry++ = new;
*entry++ = new;
}
}
return old;
}
#define pte_update pte_update
#ifdef CONFIG_PPC_16K_PAGES
#define ptep_get ptep_get
static inline pte_t ptep_get(pte_t *ptep)
{
pte_basic_t val = READ_ONCE(ptep->pte);
pte_t pte = {val, val, val, val};
return pte;
}
#endif /* CONFIG_PPC_16K_PAGES */
#endif
#endif /* __KERNEL__ */