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    Subject[PATCH v6 2/5] x86/mm: fix sme_populate_pgd() to update page flags
    Date
    Fix sme_populate_pgd() to update page flags if the PMD/PTE entry
    already exists.

    Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
    Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
    Cc: Tom Lendacky <thomas.lendacky@amd.com>
    Cc: kvm@vger.kernel.org
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Borislav Petkov <bp@suse.de>
    Cc: "H. Peter Anvin" <hpa@zytor.com>
    Cc: linux-kernel@vger.kernel.org
    Cc: Paolo Bonzini <pbonzini@redhat.com>
    Cc: Sean Christopherson <sean.j.christopherson@intel.com>
    Cc: kvm@vger.kernel.org
    Cc: "Radim Krčmář" <rkrcmar@redhat.com>
    ---
    arch/x86/mm/mem_encrypt_identity.c | 6 +-----
    1 file changed, 1 insertion(+), 5 deletions(-)

    diff --git a/arch/x86/mm/mem_encrypt_identity.c b/arch/x86/mm/mem_encrypt_identity.c
    index 92265d3..7659e65 100644
    --- a/arch/x86/mm/mem_encrypt_identity.c
    +++ b/arch/x86/mm/mem_encrypt_identity.c
    @@ -154,9 +154,6 @@ static void __init sme_populate_pgd_large(struct sme_populate_pgd_data *ppd)
    return;

    pmd = pmd_offset(pud, ppd->vaddr);
    - if (pmd_large(*pmd))
    - return;
    -
    set_pmd(pmd, __pmd(ppd->paddr | ppd->pmd_flags));
    }

    @@ -182,8 +179,7 @@ static void __init sme_populate_pgd(struct sme_populate_pgd_data *ppd)
    return;

    pte = pte_offset_map(pmd, ppd->vaddr);
    - if (pte_none(*pte))
    - set_pte(pte, __pte(ppd->paddr | ppd->pte_flags));
    + set_pte(pte, __pte(ppd->paddr | ppd->pte_flags));
    }

    static void __init __sme_map_range_pmd(struct sme_populate_pgd_data *ppd)
    --
    2.7.4
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