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Diffstat (limited to 'arch/mips/include/asm/pgtable.h')
-rw-r--r--arch/mips/include/asm/pgtable.h139
1 files changed, 93 insertions, 46 deletions
diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h
index 65bf2c065..7d44e8881 100644
--- a/arch/mips/include/asm/pgtable.h
+++ b/arch/mips/include/asm/pgtable.h
@@ -23,18 +23,19 @@
struct mm_struct;
struct vm_area_struct;
-#define PAGE_NONE __pgprot(_PAGE_PRESENT | _CACHE_CACHABLE_NONCOHERENT)
-#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_WRITE | _PAGE_READ | \
+#define PAGE_NONE __pgprot(_PAGE_PRESENT | _PAGE_NO_READ | \
_page_cachable_default)
-#define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_NO_EXEC | \
+#define PAGE_SHARED __pgprot(_PAGE_PRESENT | _PAGE_WRITE | \
_page_cachable_default)
-#define PAGE_READONLY __pgprot(_PAGE_PRESENT | _PAGE_READ | \
+#define PAGE_COPY __pgprot(_PAGE_PRESENT | _PAGE_NO_EXEC | \
+ _page_cachable_default)
+#define PAGE_READONLY __pgprot(_PAGE_PRESENT | \
_page_cachable_default)
#define PAGE_KERNEL __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \
_PAGE_GLOBAL | _page_cachable_default)
#define PAGE_KERNEL_NC __pgprot(_PAGE_PRESENT | __READABLE | __WRITEABLE | \
_PAGE_GLOBAL | _CACHE_CACHABLE_NONCOHERENT)
-#define PAGE_USERIO __pgprot(_PAGE_PRESENT | _PAGE_READ | _PAGE_WRITE | \
+#define PAGE_USERIO __pgprot(_PAGE_PRESENT | _PAGE_WRITE | \
_page_cachable_default)
#define PAGE_KERNEL_UNCACHED __pgprot(_PAGE_PRESENT | __READABLE | \
__WRITEABLE | _PAGE_GLOBAL | _CACHE_UNCACHED)
@@ -132,7 +133,12 @@ static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
#if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32)
-#define pte_none(pte) (!(((pte).pte_high) & ~_PAGE_GLOBAL))
+#ifdef CONFIG_XPA
+# define pte_none(pte) (!(((pte).pte_high) & ~_PAGE_GLOBAL))
+#else
+# define pte_none(pte) (!(((pte).pte_low | (pte).pte_high) & ~_PAGE_GLOBAL))
+#endif
+
#define pte_present(pte) ((pte).pte_low & _PAGE_PRESENT)
#define pte_no_exec(pte) ((pte).pte_low & _PAGE_NO_EXEC)
@@ -142,14 +148,21 @@ static inline void set_pte(pte_t *ptep, pte_t pte)
smp_wmb();
ptep->pte_low = pte.pte_low;
+#ifdef CONFIG_XPA
if (pte.pte_high & _PAGE_GLOBAL) {
+#else
+ if (pte.pte_low & _PAGE_GLOBAL) {
+#endif
pte_t *buddy = ptep_buddy(ptep);
/*
* Make sure the buddy is global too (if it's !none,
* it better already be global)
*/
- if (pte_none(*buddy))
+ if (pte_none(*buddy)) {
+ if (!config_enabled(CONFIG_XPA))
+ buddy->pte_low |= _PAGE_GLOBAL;
buddy->pte_high |= _PAGE_GLOBAL;
+ }
}
}
@@ -159,8 +172,13 @@ static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *pt
htw_stop();
/* Preserve global status for the pair */
- if (ptep_buddy(ptep)->pte_high & _PAGE_GLOBAL)
- null.pte_high = _PAGE_GLOBAL;
+ if (config_enabled(CONFIG_XPA)) {
+ if (ptep_buddy(ptep)->pte_high & _PAGE_GLOBAL)
+ null.pte_high = _PAGE_GLOBAL;
+ } else {
+ if (ptep_buddy(ptep)->pte_low & _PAGE_GLOBAL)
+ null.pte_low = null.pte_high = _PAGE_GLOBAL;
+ }
set_pte_at(mm, addr, ptep, null);
htw_start();
@@ -191,30 +209,42 @@ static inline void set_pte(pte_t *ptep, pte_t pteval)
* For SMP, multiple CPUs can race, so we need to do
* this atomically.
*/
-#ifdef CONFIG_64BIT
-#define LL_INSN "lld"
-#define SC_INSN "scd"
-#else /* CONFIG_32BIT */
-#define LL_INSN "ll"
-#define SC_INSN "sc"
-#endif
unsigned long page_global = _PAGE_GLOBAL;
unsigned long tmp;
- __asm__ __volatile__ (
- " .set push\n"
- " .set noreorder\n"
- "1: " LL_INSN " %[tmp], %[buddy]\n"
- " bnez %[tmp], 2f\n"
- " or %[tmp], %[tmp], %[global]\n"
- " " SC_INSN " %[tmp], %[buddy]\n"
- " beqz %[tmp], 1b\n"
- " nop\n"
- "2:\n"
- " .set pop"
- : [buddy] "+m" (buddy->pte),
- [tmp] "=&r" (tmp)
+ if (kernel_uses_llsc && R10000_LLSC_WAR) {
+ __asm__ __volatile__ (
+ " .set arch=r4000 \n"
+ " .set push \n"
+ " .set noreorder \n"
+ "1:" __LL "%[tmp], %[buddy] \n"
+ " bnez %[tmp], 2f \n"
+ " or %[tmp], %[tmp], %[global] \n"
+ __SC "%[tmp], %[buddy] \n"
+ " beqzl %[tmp], 1b \n"
+ " nop \n"
+ "2: \n"
+ " .set pop \n"
+ " .set mips0 \n"
+ : [buddy] "+m" (buddy->pte), [tmp] "=&r" (tmp)
: [global] "r" (page_global));
+ } else if (kernel_uses_llsc) {
+ __asm__ __volatile__ (
+ " .set "MIPS_ISA_ARCH_LEVEL" \n"
+ " .set push \n"
+ " .set noreorder \n"
+ "1:" __LL "%[tmp], %[buddy] \n"
+ " bnez %[tmp], 2f \n"
+ " or %[tmp], %[tmp], %[global] \n"
+ __SC "%[tmp], %[buddy] \n"
+ " beqz %[tmp], 1b \n"
+ " nop \n"
+ "2: \n"
+ " .set pop \n"
+ " .set mips0 \n"
+ : [buddy] "+m" (buddy->pte), [tmp] "=&r" (tmp)
+ : [global] "r" (page_global));
+ }
#else /* !CONFIG_SMP */
if (pte_none(*buddy))
pte_val(*buddy) = pte_val(*buddy) | _PAGE_GLOBAL;
@@ -289,6 +319,8 @@ static inline int pte_young(pte_t pte) { return pte.pte_low & _PAGE_ACCESSED; }
static inline pte_t pte_wrprotect(pte_t pte)
{
pte.pte_low &= ~_PAGE_WRITE;
+ if (!config_enabled(CONFIG_XPA))
+ pte.pte_low &= ~_PAGE_SILENT_WRITE;
pte.pte_high &= ~_PAGE_SILENT_WRITE;
return pte;
}
@@ -296,6 +328,8 @@ static inline pte_t pte_wrprotect(pte_t pte)
static inline pte_t pte_mkclean(pte_t pte)
{
pte.pte_low &= ~_PAGE_MODIFIED;
+ if (!config_enabled(CONFIG_XPA))
+ pte.pte_low &= ~_PAGE_SILENT_WRITE;
pte.pte_high &= ~_PAGE_SILENT_WRITE;
return pte;
}
@@ -303,6 +337,8 @@ static inline pte_t pte_mkclean(pte_t pte)
static inline pte_t pte_mkold(pte_t pte)
{
pte.pte_low &= ~_PAGE_ACCESSED;
+ if (!config_enabled(CONFIG_XPA))
+ pte.pte_low &= ~_PAGE_SILENT_READ;
pte.pte_high &= ~_PAGE_SILENT_READ;
return pte;
}
@@ -310,24 +346,33 @@ static inline pte_t pte_mkold(pte_t pte)
static inline pte_t pte_mkwrite(pte_t pte)
{
pte.pte_low |= _PAGE_WRITE;
- if (pte.pte_low & _PAGE_MODIFIED)
+ if (pte.pte_low & _PAGE_MODIFIED) {
+ if (!config_enabled(CONFIG_XPA))
+ pte.pte_low |= _PAGE_SILENT_WRITE;
pte.pte_high |= _PAGE_SILENT_WRITE;
+ }
return pte;
}
static inline pte_t pte_mkdirty(pte_t pte)
{
pte.pte_low |= _PAGE_MODIFIED;
- if (pte.pte_low & _PAGE_WRITE)
+ if (pte.pte_low & _PAGE_WRITE) {
+ if (!config_enabled(CONFIG_XPA))
+ pte.pte_low |= _PAGE_SILENT_WRITE;
pte.pte_high |= _PAGE_SILENT_WRITE;
+ }
return pte;
}
static inline pte_t pte_mkyoung(pte_t pte)
{
pte.pte_low |= _PAGE_ACCESSED;
- if (pte.pte_low & _PAGE_READ)
+ if (!(pte.pte_low & _PAGE_NO_READ)) {
+ if (!config_enabled(CONFIG_XPA))
+ pte.pte_low |= _PAGE_SILENT_READ;
pte.pte_high |= _PAGE_SILENT_READ;
+ }
return pte;
}
#else
@@ -372,13 +417,8 @@ static inline pte_t pte_mkdirty(pte_t pte)
static inline pte_t pte_mkyoung(pte_t pte)
{
pte_val(pte) |= _PAGE_ACCESSED;
-#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6)
if (!(pte_val(pte) & _PAGE_NO_READ))
pte_val(pte) |= _PAGE_SILENT_READ;
- else
-#endif
- if (pte_val(pte) & _PAGE_READ)
- pte_val(pte) |= _PAGE_SILENT_READ;
return pte;
}
@@ -430,19 +470,29 @@ static inline pgprot_t pgprot_writecombine(pgprot_t _prot)
*/
#define mk_pte(page, pgprot) pfn_pte(page_to_pfn(page), (pgprot))
-#if defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32)
+#if defined(CONFIG_XPA)
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
pte.pte_low &= (_PAGE_MODIFIED | _PAGE_ACCESSED | _PFNX_MASK);
pte.pte_high &= (_PFN_MASK | _CACHE_MASK);
pte.pte_low |= pgprot_val(newprot) & ~_PFNX_MASK;
- pte.pte_high |= pgprot_val(newprot) & ~_PFN_MASK;
+ pte.pte_high |= pgprot_val(newprot) & ~(_PFN_MASK | _CACHE_MASK);
+ return pte;
+}
+#elif defined(CONFIG_PHYS_ADDR_T_64BIT) && defined(CONFIG_CPU_MIPS32)
+static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
+{
+ pte.pte_low &= _PAGE_CHG_MASK;
+ pte.pte_high &= (_PFN_MASK | _CACHE_MASK);
+ pte.pte_low |= pgprot_val(newprot);
+ pte.pte_high |= pgprot_val(newprot) & ~(_PFN_MASK | _CACHE_MASK);
return pte;
}
#else
static inline pte_t pte_modify(pte_t pte, pgprot_t newprot)
{
- return __pte((pte_val(pte) & _PAGE_CHG_MASK) | pgprot_val(newprot));
+ return __pte((pte_val(pte) & _PAGE_CHG_MASK) |
+ (pgprot_val(newprot) & ~_PAGE_CHG_MASK));
}
#endif
@@ -484,6 +534,7 @@ static inline int io_remap_pfn_range(struct vm_area_struct *vma,
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
+#define has_transparent_hugepage has_transparent_hugepage
extern int has_transparent_hugepage(void);
static inline int pmd_trans_huge(pmd_t pmd)
@@ -558,13 +609,8 @@ static inline pmd_t pmd_mkyoung(pmd_t pmd)
{
pmd_val(pmd) |= _PAGE_ACCESSED;
-#if defined(CONFIG_CPU_MIPSR2) || defined(CONFIG_CPU_MIPSR6)
if (!(pmd_val(pmd) & _PAGE_NO_READ))
pmd_val(pmd) |= _PAGE_SILENT_READ;
- else
-#endif
- if (pmd_val(pmd) & _PAGE_READ)
- pmd_val(pmd) |= _PAGE_SILENT_READ;
return pmd;
}
@@ -587,7 +633,8 @@ static inline struct page *pmd_page(pmd_t pmd)
static inline pmd_t pmd_modify(pmd_t pmd, pgprot_t newprot)
{
- pmd_val(pmd) = (pmd_val(pmd) & _PAGE_CHG_MASK) | pgprot_val(newprot);
+ pmd_val(pmd) = (pmd_val(pmd) & (_PAGE_CHG_MASK | _PAGE_HUGE)) |
+ (pgprot_val(newprot) & ~_PAGE_CHG_MASK);
return pmd;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-30 18:28:44 +0000