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    Subject[PATCH v19 010/130] KVM: x86: Pass is_private to gmem hook of gmem_max_level
    Date
    From: Isaku Yamahata <isaku.yamahata@intel.com>

    TDX wants to know the faulting address is shared or private so that the max
    level is limited by Secure-EPT or not. Because fault->gfn doesn't include
    shared bit, gfn doesn't tell if the faulting address is shared or not.
    Pass is_private for TDX case.

    TDX logic will be if (!is_private) return 0; else return PG_LEVEL_4K.

    Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
    ---
    arch/x86/include/asm/kvm_host.h | 3 ++-
    arch/x86/kvm/mmu/mmu.c | 3 ++-
    2 files changed, 4 insertions(+), 2 deletions(-)

    diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
    index d15f5b4b1656..57ce89fc2740 100644
    --- a/arch/x86/include/asm/kvm_host.h
    +++ b/arch/x86/include/asm/kvm_host.h
    @@ -1797,7 +1797,8 @@ struct kvm_x86_ops {

    gva_t (*get_untagged_addr)(struct kvm_vcpu *vcpu, gva_t gva, unsigned int flags);

    - int (*gmem_max_level)(struct kvm *kvm, kvm_pfn_t pfn, gfn_t gfn, u8 *max_level);
    + int (*gmem_max_level)(struct kvm *kvm, kvm_pfn_t pfn, gfn_t gfn,
    + bool is_private, u8 *max_level);
    };

    struct kvm_x86_nested_ops {
    diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
    index 1e5e12d2707d..22db1a9f528a 100644
    --- a/arch/x86/kvm/mmu/mmu.c
    +++ b/arch/x86/kvm/mmu/mmu.c
    @@ -4324,7 +4324,8 @@ static int kvm_faultin_pfn_private(struct kvm_vcpu *vcpu,

    max_level = kvm_max_level_for_order(max_order);
    r = static_call(kvm_x86_gmem_max_level)(vcpu->kvm, fault->pfn,
    - fault->gfn, &max_level);
    + fault->gfn, fault->is_private,
    + &max_level);
    if (r) {
    kvm_release_pfn_clean(fault->pfn);
    return r;
    --
    2.25.1

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