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xen/mmu: use extend_args for more mmuext updates 

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
This commit is contained in:
Jeremy Fitzhardinge 2010-12-17 09:17:32 -08:00
parent c8eed1719a
commit dcf7435cfe
1 changed files with 27 additions and 15 deletions
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42
arch/x86/xen/mmu.c
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@ -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);