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Re: [PATCH 2/2] x86/cpu: Handle GUEST_MAXPHYADDR < HOST_MAXPHYADDR for h
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From: |
Jim Mattson |
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Subject: |
Re: [PATCH 2/2] x86/cpu: Handle GUEST_MAXPHYADDR < HOST_MAXPHYADDR for hosts that don't support it |
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Date: |
Thu, 9 Jul 2020 10:00:59 -0700 |
On Thu, Jul 9, 2020 at 2:44 AM Gerd Hoffmann <kraxel@redhat.com> wrote:
> (2) GUEST_MAXPHYADDR < HOST_MAXPHYADDR
>
> Mostly fine. Some edge cases, like different page fault errors for
> addresses above GUEST_MAXPHYADDR and below HOST_MAXPHYADDR. Which I
> think Mohammed fixed in the kernel recently.
Doesn't this require intercepting MOV-to-CR3 when the guest is in PAE
mode, so that the hypervisor can validate the high bits in the PDPTEs?
- Re: [PATCH 2/2] x86/cpu: Handle GUEST_MAXPHYADDR < HOST_MAXPHYADDR for hosts that don't support it, Eduardo Habkost, 2020/07/08
- Re: [PATCH 2/2] x86/cpu: Handle GUEST_MAXPHYADDR < HOST_MAXPHYADDR for hosts that don't support it, Daniel P . Berrangé, 2020/07/08
- Re: [PATCH 2/2] x86/cpu: Handle GUEST_MAXPHYADDR < HOST_MAXPHYADDR for hosts that don't support it, Gerd Hoffmann, 2020/07/09
- Re: [PATCH 2/2] x86/cpu: Handle GUEST_MAXPHYADDR < HOST_MAXPHYADDR for hosts that don't support it,
Jim Mattson <=
- Re: [PATCH 2/2] x86/cpu: Handle GUEST_MAXPHYADDR < HOST_MAXPHYADDR for hosts that don't support it, Eduardo Habkost, 2020/07/09
- Re: [PATCH 2/2] x86/cpu: Handle GUEST_MAXPHYADDR < HOST_MAXPHYADDR for hosts that don't support it, Paolo Bonzini, 2020/07/10
- Re: [PATCH 2/2] x86/cpu: Handle GUEST_MAXPHYADDR < HOST_MAXPHYADDR for hosts that don't support it, Eduardo Habkost, 2020/07/10
- Re: [PATCH 2/2] x86/cpu: Handle GUEST_MAXPHYADDR < HOST_MAXPHYADDR for hosts that don't support it, Paolo Bonzini, 2020/07/10
- Re: [PATCH 2/2] x86/cpu: Handle GUEST_MAXPHYADDR < HOST_MAXPHYADDR for hosts that don't support it, Paolo Bonzini, 2020/07/10