>+static inline void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
>pte_t *ptep, pte_t pteval) {
>+ if ((mm != current->mm && mm != &init_mm) ||
>+ HYPERVISOR_update_va_mapping(addr, pteval, 0))
>+ set_pmd((pmd_t *)ptep, (pmd_t){__pte_val(pteval)});
>+}
Your Xen patch made no attempt at implementing L2 modifications through
update_va_mapping, so why have the guest even try?
>+static inline pte_t huge_ptep_get_and_clear(struct mm_struct *mm, unsigned
>long addr, pte_t *ptep)
>+{
>+ pte_t pte = *ptep;
>+ if (!pte_none(pte)) {
>+ if ((mm != &init_mm) ||
>+ HYPERVISOR_update_va_mapping(addr, __pte(0), 0)) {
>+ pte = *ptep;
>+ set_pmd((pmd_t *)ptep, __pmd(0));
Same here.
Jan
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