diff options
| 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/xen/enlighten.c | |
| parent | 338b9bb3adac0d2c5a1e180491d9b001d624c402 (diff) | |
| download | lwn-38ffbe66d59051fd9cfcfc8545f164700e2fa3bc.tar.gz lwn-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/xen/enlighten.c')
| -rw-r--r-- | arch/x86/xen/enlighten.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index 9ff6e3cbf08f..06219e60e9c8 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -325,6 +325,26 @@ static unsigned long xen_store_tr(void) return 0; } +static void xen_alloc_ldt(struct desc_struct *ldt, unsigned entries) +{ + unsigned pages = roundup(entries * LDT_ENTRY_SIZE, PAGE_SIZE); + void *v = ldt; + int i; + + for(i = 0; i < pages; i += PAGE_SIZE) + make_lowmem_page_readonly(v + i); +} + +static void xen_free_ldt(struct desc_struct *ldt, unsigned entries) +{ + unsigned pages = roundup(entries * LDT_ENTRY_SIZE, PAGE_SIZE); + void *v = ldt; + int i; + + for(i = 0; i < pages; i += PAGE_SIZE) + make_lowmem_page_readwrite(v + i); +} + static void xen_set_ldt(const void *addr, unsigned entries) { struct mmuext_op *op; @@ -1220,6 +1240,9 @@ static const struct pv_cpu_ops xen_cpu_ops __initdata = { .load_gs_index = xen_load_gs_index, #endif + .alloc_ldt = xen_alloc_ldt, + .free_ldt = xen_free_ldt, + .store_gdt = native_store_gdt, .store_idt = native_store_idt, .store_tr = xen_store_tr, |