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    SubjectRe: [RFC PATCH v2 40/69] KVM: Export kvm_is_reserved_pfn() for use by TDX
    Date
    On 03/07/21 00:04, isaku.yamahata@intel.com wrote:
    > From: Sean Christopherson <sean.j.christopherson@intel.com>
    >
    > TDX will use kvm_is_reserved_pfn() to prevent installing a reserved PFN
    > int SEPT. Or rather, to prevent such an attempt, as reserved PFNs are
    > not covered by TDMRs.
    >
    > Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
    > Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
    > ---
    > virt/kvm/kvm_main.c | 1 +
    > 1 file changed, 1 insertion(+)
    >
    > diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
    > index 8b075b5e7303..dd6492b526c9 100644
    > --- a/virt/kvm/kvm_main.c
    > +++ b/virt/kvm/kvm_main.c
    > @@ -188,6 +188,7 @@ bool kvm_is_reserved_pfn(kvm_pfn_t pfn)
    >
    > return true;
    > }
    > +EXPORT_SYMBOL_GPL(kvm_is_reserved_pfn);
    >
    > bool kvm_is_transparent_hugepage(kvm_pfn_t pfn)
    > {
    >

    As before, there's no problem in squashing this in the patch that
    introduces the use of kvm_is_reserved_pfn. You could also move
    kvm_is_reserved_pfn and kvm_is_zone_device_pfn to a .h file.

    Paolo

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