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Groups > linux.kernel > #1719255
| From | Paolo Bonzini <pbonzini@redhat.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v3 2/5] KVM: MMU: check guest CR3 reserved bits based on its physical address width. |
| Date | 2017-08-24 15:50 +0200 |
| Message-ID | <ui0Gf-7fv-27@gated-at.bofh.it> (permalink) |
| References | <uhZTP-6H8-5@gated-at.bofh.it> <uhZTQ-6H8-25@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 24/08/2017 14:27, Yu Zhang wrote:
> diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h
> index 3ed6192..67e7ec2 100644
> --- a/arch/x86/kvm/mmu.h
> +++ b/arch/x86/kvm/mmu.h
> @@ -48,6 +48,9 @@
>
> static inline u64 rsvd_bits(int s, int e)
> {
> + if (e < s)
> + return 0;
> +
> return ((1ULL << (e - s + 1)) - 1) << s;
> }
e = s - 1 is already supported; why do you need e <= s - 2?
Paolo
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[PATCH v3 0/5] KVM: MMU: 5 level EPT/shadow support Yu Zhang <yu.c.zhang@linux.intel.com> - 2017-08-24 15:00 +0200
[PATCH v3 4/5] KVM: MMU: Add 5 level EPT & Shadow page table support. Yu Zhang <yu.c.zhang@linux.intel.com> - 2017-08-24 15:00 +0200
Re: [PATCH v3 4/5] KVM: MMU: Add 5 level EPT & Shadow page table support. Paolo Bonzini <pbonzini@redhat.com> - 2017-08-24 15:50 +0200
[PATCH v3 1/5] KVM: x86: Add return value to kvm_cpuid(). Yu Zhang <yu.c.zhang@linux.intel.com> - 2017-08-24 15:00 +0200
[PATCH v3 5/5] KVM: MMU: Expose the LA57 feature to VM. Yu Zhang <yu.c.zhang@linux.intel.com> - 2017-08-24 15:00 +0200
[PATCH v3 2/5] KVM: MMU: check guest CR3 reserved bits based on its physical address width. Yu Zhang <yu.c.zhang@linux.intel.com> - 2017-08-24 15:00 +0200
Re: [PATCH v3 2/5] KVM: MMU: check guest CR3 reserved bits based on its physical address width. Paolo Bonzini <pbonzini@redhat.com> - 2017-08-24 15:50 +0200
Re: [PATCH v3 2/5] KVM: MMU: check guest CR3 reserved bits based on its physical address width. Yu Zhang <yu.c.zhang@linux.intel.com> - 2017-08-24 17:50 +0200
Re: [PATCH v3 2/5] KVM: MMU: check guest CR3 reserved bits based on its physical address width. Paolo Bonzini <pbonzini@redhat.com> - 2017-08-24 18:00 +0200
Re: [PATCH v3 2/5] KVM: MMU: check guest CR3 reserved bits based on its physical address width. Yu Zhang <yu.c.zhang@linux.intel.com> - 2017-08-24 18:10 +0200
Re: [PATCH v3 2/5] KVM: MMU: check guest CR3 reserved bits based on its physical address width. Paolo Bonzini <pbonzini@redhat.com> - 2017-08-24 18:30 +0200
Re: [PATCH v3 2/5] KVM: MMU: check guest CR3 reserved bits based on its physical address width. Yu Zhang <yu.c.zhang@linux.intel.com> - 2017-08-24 18:50 +0200
Re: [PATCH v3 2/5] KVM: MMU: check guest CR3 reserved bits based on its physical address width. Paolo Bonzini <pbonzini@redhat.com> - 2017-08-24 19:00 +0200
Re: [PATCH v3 0/5] KVM: MMU: 5 level EPT/shadow support Paolo Bonzini <pbonzini@redhat.com> - 2017-08-24 15:50 +0200
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