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| author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-12-17 17:17:32 (GMT) |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2011-07-18 22:43:27 (GMT) |
| commit | dcf7435cfe617c9d9f3dd501d3f5ed4d0b30c218 (patch) | |
| tree | 7fe6ea1d049d33f5a4ac31c4a8b66e2a1ea0d851 /arch/x86 | |
| parent | c8eed1719afb337472c5ef31ec590d549770b173 (diff) | |
| download | linux-dcf7435cfe617c9d9f3dd501d3f5ed4d0b30c218.tar.xz | |
xen/mmu: use extend_args for more mmuext updates
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/xen/mmu.c | 42 |
1 files changed, 27 insertions, 15 deletions
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index c3abba1..eb91126 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -229,6 +229,24 @@ static void xen_extend_mmu_update(const struct mmu_update *update) *u = *update; } +static void xen_extend_mmuext_op(const struct mmuext_op *op) +{ + struct multicall_space mcs; + struct mmuext_op *u; + + mcs = xen_mc_extend_args(__HYPERVISOR_mmuext_op, sizeof(*u)); + + if (mcs.mc != NULL) { + mcs.mc->args[1]++; + } else { + mcs = __xen_mc_entry(sizeof(*u)); + MULTI_mmuext_op(mcs.mc, mcs.args, 1, NULL, DOMID_SELF); + } + + u = mcs.args; + *u = *op; +} + static void xen_set_pmd_hyper(pmd_t *ptr, pmd_t val) { struct mmu_update u; @@ -810,14 +828,12 @@ static void xen_pte_unlock(void *v) static void xen_do_pin(unsigned level, unsigned long pfn) { - struct mmuext_op *op; - struct multicall_space mcs; + struct mmuext_op op; - mcs = __xen_mc_entry(sizeof(*op)); - op = mcs.args; - op->cmd = level; - op->arg1.mfn = pfn_to_mfn(pfn); - MULTI_mmuext_op(mcs.mc, op, 1, NULL, DOMID_SELF); + op.cmd = level; + op.arg1.mfn = pfn_to_mfn(pfn); + + xen_extend_mmuext_op(&op); } static int xen_pin_page(struct mm_struct *mm, struct page *page, @@ -1307,8 +1323,7 @@ static void set_current_cr3(void *v) static void __xen_write_cr3(bool kernel, unsigned long cr3) { - struct mmuext_op *op; - struct multicall_space mcs; + struct mmuext_op op; unsigned long mfn; trace_xen_mmu_write_cr3(kernel, cr3); @@ -1320,13 +1335,10 @@ static void __xen_write_cr3(bool kernel, unsigned long cr3) WARN_ON(mfn == 0 && kernel); - mcs = __xen_mc_entry(sizeof(*op)); + op.cmd = kernel ? MMUEXT_NEW_BASEPTR : MMUEXT_NEW_USER_BASEPTR; + op.arg1.mfn = mfn; - op = mcs.args; - op->cmd = kernel ? MMUEXT_NEW_BASEPTR : MMUEXT_NEW_USER_BASEPTR; - op->arg1.mfn = mfn; - - MULTI_mmuext_op(mcs.mc, op, 1, NULL, DOMID_SELF); + xen_extend_mmuext_op(&op); if (kernel) { percpu_write(xen_cr3, cr3); |