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    Subject[PATCH 23/37] x86/mm/legacy: Populate the user page-table with user pgd's
    Date
    From: Joerg Roedel <jroedel@suse.de>

    Also populate the user-spage pgd's in the user page-table.

    Signed-off-by: Joerg Roedel <jroedel@suse.de>
    ---
    arch/x86/include/asm/pgtable-2level.h | 9 +++++++++
    1 file changed, 9 insertions(+)

    diff --git a/arch/x86/include/asm/pgtable-2level.h b/arch/x86/include/asm/pgtable-2level.h
    index 685ffe8..c399ea5 100644
    --- a/arch/x86/include/asm/pgtable-2level.h
    +++ b/arch/x86/include/asm/pgtable-2level.h
    @@ -19,6 +19,9 @@ static inline void native_set_pte(pte_t *ptep , pte_t pte)

    static inline void native_set_pmd(pmd_t *pmdp, pmd_t pmd)
    {
    +#ifdef CONFIG_PAGE_TABLE_ISOLATION
    + pmd.pud.p4d.pgd = pti_set_user_pgtbl(&pmdp->pud.p4d.pgd, pmd.pud.p4d.pgd);
    +#endif
    *pmdp = pmd;
    }

    @@ -58,6 +61,9 @@ static inline pte_t native_ptep_get_and_clear(pte_t *xp)
    #ifdef CONFIG_SMP
    static inline pmd_t native_pmdp_get_and_clear(pmd_t *xp)
    {
    +#ifdef CONFIG_PAGE_TABLE_ISOLATION
    + pti_set_user_pgtbl(&xp->pud.p4d.pgd, __pgd(0));
    +#endif
    return __pmd(xchg((pmdval_t *)xp, 0));
    }
    #else
    @@ -67,6 +73,9 @@ static inline pmd_t native_pmdp_get_and_clear(pmd_t *xp)
    #ifdef CONFIG_SMP
    static inline pud_t native_pudp_get_and_clear(pud_t *xp)
    {
    +#ifdef CONFIG_PAGE_TABLE_ISOLATION
    + pti_set_user_pgtbl(&xp->p4d.pgd, __pgd(0));
    +#endif
    return __pud(xchg((pudval_t *)xp, 0));
    }
    #else
    --
    2.7.4
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