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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-07-23 14:21:18 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-24 12:30:06 +0200 |
| commit | 38ffbe66d59051fd9cfcfc8545f164700e2fa3bc (patch) | |
| tree | 37e76db49cc86b3da550a62f36d101c7269d262e /arch/x86/kernel/ldt.c | |
| parent | 338b9bb3adac0d2c5a1e180491d9b001d624c402 (diff) | |
| download | blackbird-op-linux-38ffbe66d59051fd9cfcfc8545f164700e2fa3bc.tar.gz blackbird-op-linux-38ffbe66d59051fd9cfcfc8545f164700e2fa3bc.zip | |
x86/paravirt/xen: properly fill out the ldt ops
LTP testing showed that Xen does not properly implement
sys_modify_ldt(). This patch does the final little bits needed to
make the ldt work properly.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/ldt.c')
| -rw-r--r-- | arch/x86/kernel/ldt.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/arch/x86/kernel/ldt.c b/arch/x86/kernel/ldt.c index 3fee2aa50f3f..4895e0634d22 100644 --- a/arch/x86/kernel/ldt.c +++ b/arch/x86/kernel/ldt.c @@ -51,6 +51,8 @@ static int alloc_ldt(mm_context_t *pc, int mincount, int reload) memset(newldt + oldsize * LDT_ENTRY_SIZE, 0, (mincount - oldsize) * LDT_ENTRY_SIZE); + paravirt_alloc_ldt(newldt, mincount); + #ifdef CONFIG_X86_64 /* CHECKME: Do we really need this ? */ wmb(); @@ -75,6 +77,7 @@ static int alloc_ldt(mm_context_t *pc, int mincount, int reload) #endif } if (oldsize) { + paravirt_free_ldt(oldldt, oldsize); if (oldsize * LDT_ENTRY_SIZE > PAGE_SIZE) vfree(oldldt); else @@ -86,10 +89,13 @@ static int alloc_ldt(mm_context_t *pc, int mincount, int reload) static inline int copy_ldt(mm_context_t *new, mm_context_t *old) { int err = alloc_ldt(new, old->size, 0); + int i; if (err < 0) return err; - memcpy(new->ldt, old->ldt, old->size * LDT_ENTRY_SIZE); + + for(i = 0; i < old->size; i++) + write_ldt_entry(new->ldt, i, old->ldt + i * LDT_ENTRY_SIZE); return 0; } @@ -126,6 +132,7 @@ void destroy_context(struct mm_struct *mm) if (mm == current->active_mm) clear_LDT(); #endif + paravirt_free_ldt(mm->context.ldt, mm->context.size); if (mm->context.size * LDT_ENTRY_SIZE > PAGE_SIZE) vfree(mm->context.ldt); else |
