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add pte_get_attr()

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NAKAMURA Gou
2016-03-28 14:28:27 +09:00
parent a2c29e8abf
commit c760a01a79
2 changed files with 32 additions and 7 deletions
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37
arch/x86/kernel/include/arch-memory.h
View File

@@ -67,6 +67,8 @@
#define PF_PRESENT ((pte_t)0x01) /* entry is valid */
#define PF_WRITABLE ((pte_t)0x02)
#define PFLX_PWT ((pte_t)0x08)
#define PFLX_PCD ((pte_t)0x10)
#define PF_SIZE ((pte_t)0x80) /* entry points large page */
#define PFL4_PRESENT ((pte_t)0x01)
@@ -76,8 +78,8 @@
#define PFL3_PRESENT ((pte_t)0x01)
#define PFL3_WRITABLE ((pte_t)0x02)
#define PFL3_USER ((pte_t)0x04)
#define PFL3_PWT ((pte_t)0x08)
#define PFL3_PCD ((pte_t)0x10)
#define PFL3_PWT PFLX_PWT
#define PFL3_PCD PFLX_PCD
#define PFL3_ACCESSED ((pte_t)0x20)
#define PFL3_DIRTY ((pte_t)0x40)
#define PFL3_SIZE ((pte_t)0x80) /* Used in 1G page */
@@ -88,8 +90,8 @@
#define PFL2_PRESENT ((pte_t)0x01)
#define PFL2_WRITABLE ((pte_t)0x02)
#define PFL2_USER ((pte_t)0x04)
#define PFL2_PWT ((pte_t)0x08)
#define PFL2_PCD ((pte_t)0x10)
#define PFL2_PWT PFLX_PWT
#define PFL2_PCD PFLX_PCD
#define PFL2_ACCESSED ((pte_t)0x20)
#define PFL2_DIRTY ((pte_t)0x40)
#define PFL2_SIZE ((pte_t)0x80) /* Used in 2M page */
@@ -100,8 +102,8 @@
#define PFL1_PRESENT ((pte_t)0x01)
#define PFL1_WRITABLE ((pte_t)0x02)
#define PFL1_USER ((pte_t)0x04)
#define PFL1_PWT ((pte_t)0x08)
#define PFL1_PCD ((pte_t)0x10)
#define PFL1_PWT PFLX_PWT
#define PFL1_PCD PFLX_PCD
#define PFL1_ACCESSED ((pte_t)0x20)
#define PFL1_DIRTY ((pte_t)0x40)
#define PFL1_IGNORED_11 ((pte_t)1 << 11)
@@ -154,6 +156,8 @@ enum ihk_mc_pt_attribute {
PTATTR_WRITE_COMBINED = 0x40000,
};
enum ihk_mc_pt_attribute attr_mask;
static inline int pte_is_null(pte_t *ptep)
{
return (*ptep == PTE_NULL);
@@ -209,6 +213,27 @@ static inline off_t pte_get_off(pte_t *ptep, size_t pgsize)
return (off_t)(*ptep & PAGE_MASK);
}
static inline enum ihk_mc_pt_attribute pte_get_attr(pte_t *ptep, size_t pgsize)
{
enum ihk_mc_pt_attribute attr;
attr = *ptep & attr_mask;
if (*ptep & PFLX_PWT) {
if (*ptep & PFLX_PCD) {
attr |= PTATTR_UNCACHABLE;
}
else {
attr |= PTATTR_WRITE_COMBINED;
}
}
if (((pgsize == PTL2_SIZE) && (*ptep & PFL2_SIZE))
|| ((pgsize == PTL3_SIZE) && (*ptep & PFL3_SIZE))) {
attr |= PTATTR_LARGEPAGE;
}
return attr;
} /* pte_get_attr() */
static inline void pte_make_null(pte_t *ptep, size_t pgsize)
{
*ptep = PTE_NULL;

2
arch/x86/kernel/memory.c
View File

@@ -223,7 +223,7 @@ static struct page_table *__alloc_new_pt(enum ihk_mc_ap_flag ap_flag)
* but L2 and L1 do not!
*/
static enum ihk_mc_pt_attribute attr_mask
enum ihk_mc_pt_attribute attr_mask
= 0
| PTATTR_FILEOFF
| PTATTR_WRITABLE