Re: [Xen-devel] [PATCH v6 24/29] xen/x86: allow HVM guests to use hypercalls to bring up vCPUs

To: Jan Beulich <JBeulich@xxxxxxxx>, Roger Pau Monne <roger.pau@xxxxxxxxxx>
From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Date: Fri, 25 Sep 2015 16:16:30 +0100
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, Stefano Stabellini <stefano.stabellini@xxxxxxxxxx>, Ian Campbell <ian.campbell@xxxxxxxxxx>
Delivery-date: Fri, 25 Sep 2015 15:16:37 +0000
List-id: Xen developer discussion <xen-devel.lists.xen.org>


On 21/09/15 16:44, Jan Beulich wrote:

+    uint32_t cr0;
+    uint32_t cr3;
+    uint32_t cr4;
+    uint64_t efer;

What again was the point of having EFER here?

EFER.NX must match what the BSP chose to set up in the pagetablespointed to in %cr3, or a triple fault will occur.


~Andrew

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Follow-Ups:
- Re: [Xen-devel] [PATCH v6 24/29] xen/x86: allow HVM guests to use hypercalls to bring up vCPUs
  - From: Jan Beulich

References:
- [Xen-devel] [PATCH v6 00/29] Introduce HVM without dm and new boot ABI
  - From: Roger Pau Monne
- [Xen-devel] [PATCH v6 24/29] xen/x86: allow HVM guests to use hypercalls to bring up vCPUs
  - From: Roger Pau Monne
- Re: [Xen-devel] [PATCH v6 24/29] xen/x86: allow HVM guests to use hypercalls to bring up vCPUs
  - From: Jan Beulich

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