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authorJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>2010-12-17 09:17:32 -0800
committerJeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>2011-07-18 15:43:27 -0700
commitdcf7435cfe617c9d9f3dd501d3f5ed4d0b30c218 (patch)
tree7fe6ea1d049d33f5a4ac31c4a8b66e2a1ea0d851 /arch/x86/xen
parentc8eed1719afb337472c5ef31ec590d549770b173 (diff)
xen/mmu: use extend_args for more mmuext updates
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Diffstat (limited to 'arch/x86/xen')
-rw-r--r--arch/x86/xen/mmu.c42
1 files changed, 27 insertions, 15 deletions
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index c3abba17ab0..eb9112687ce 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);