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support remap_file_pages(2)

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fixes #21
This commit is contained in:
NAKAMURA Gou
2014-06-23 18:43:16 +09:00
parent bb3756dc74
commit 90aaf9dc9c
5 changed files with 187 additions and 0 deletions
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22
arch/x86/kernel/include/arch-memory.h
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@ -185,6 +185,28 @@ static inline off_t pte_get_off(pte_t *ptep, size_t pgsize)
return (off_t)(*ptep & PAGE_MASK);
}
static inline void pte_make_fileoff(off_t off,
enum ihk_mc_pt_attribute ptattr, size_t pgsize, pte_t *ptep)
{
uint64_t attr;
attr = ptattr & ~PAGE_MASK;
switch (pgsize) {
case PTL1_SIZE: attr |= PFL1_FILEOFF; break;
case PTL2_SIZE: attr |= PFL2_FILEOFF | PFL2_SIZE; break;
case PTL3_SIZE: attr |= PFL3_FILEOFF | PFL3_SIZE; break;
default:
#if 0 /* XXX: workaround. cannot use panic() here */
panic("pte_make_fileoff");
#else
attr |= PTATTR_FILEOFF;
#endif
break;
}
*ptep = (off & PAGE_MASK) | attr;
}
#if 0 /* XXX: workaround. cannot use panic() here */
static inline void pte_xchg(pte_t *ptep, pte_t *valp)
{

1
arch/x86/kernel/include/syscall_list.h
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@ -75,6 +75,7 @@ SYSCALL_DELEGATED(201, time)
SYSCALL_HANDLED(202, futex)
SYSCALL_HANDLED(203, sched_setaffinity)
SYSCALL_HANDLED(204, sched_getaffinity)
SYSCALL_HANDLED(216, remap_file_pages)
SYSCALL_DELEGATED(217, getdents64)
SYSCALL_HANDLED(218, set_tid_address)
SYSCALL_HANDLED(231, exit_group)