void my_xen_l2_entry_update(pmd_t *ptr, pmd_t val)
{
if(aim!=xen_l2_entry_update_id || signal==0) jprobe_return();
if(leave==1) {BUG_ON(HYPERVISOR_mmu_update(&mmuupdateop, 1, NULL, DOMID_SELF) < 0);leave=0;}
//if((strcmp(current->comm,"xm")==0)||(strcmp(current->comm,"xend")==0)) printk("Fortune: %s\n",current->comm); else jprobe_return();
if(time>0) --time; else {signal=0;printk("Done.\n");jprobe_return();}
printk("Fortune: xen_l2_entry_update from %s\n",current->comm);
printk("Fortune: pmd=0x%llx\tval=0x%llx\n",ptr->pmd,val.pmd);
printk("Fortune: ptr real=0x%llx\n",virt_to_machine(ptr));
mmuupdateop.ptr = virt_to_machine(ptr);
mmuupdateop.val = pmd_val_ma(val);
if(fault==0)
{
getrando(64);
mmuupdateop.ptr ^= (1 << rando);
printk("Fortune: change ptr to 0x%llx\n",mmuupdateop.ptr);
leave=1;
}
if(fault==1)
{
getrando(64);
ptr->pmd ^= (1 << rando);
printk("Fortune: change pmd to 0x%llx\n",ptr->pmd);
//not need to leave=1
}
if(fault==2)
{
getrando(64);
mmuupdateop.val ^= (1 << rando);
printk("Fortune: change val to 0x%llx\n",mmuupdateop.val);
leave=1;
}
jprobe_return();
}
void xen_l2_entry_update(pmd_t *ptr, pmd_t val)
{
mmu_update_t u;
u.ptr = virt_to_machine(ptr);
u.val = pmd_val_ma(val);
BUG_ON(HYPERVISOR_mmu_update(&u, 1, NULL, DOMID_SELF) < 0);
}
void xen_set_pmd(pmd_t *ptr, pmd_t val)
{
struct multicall_space mcs;
struct mmu_update *u;
preempt_disable();
mcs = xen_mc_entry(sizeof(*u));
u = mcs.args;
u->ptr = virt_to_machine(ptr).maddr;
u->val = pmd_val_ma(val);
MULTI_mmu_update(mcs.mc, u, 1, NULL, DOMID_SELF);
xen_mc_issue(PARAVIRT_LAZY_MMU);
preempt_enable();
}
static void xen_set_pmd_hyper(pmd_t *ptr, pmd_t val)
{
struct mmu_update u;
preempt_disable();
xen_mc_batch();
/* ptr may be ioremapped for 64-bit pagetable setup */
u.ptr = arbitrary_virt_to_machine(ptr).maddr;
u.val = pmd_val_ma(val);
xen_extend_mmu_update(&u);
xen_mc_issue(PARAVIRT_LAZY_MMU);
preempt_enable();
}
