KVM: SVM: Sync efer back into nested vmcb
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From: Avi Kivity on 27 Jul 2010 15:10 On 07/27/2010 07:14 PM, Joerg Roedel wrote: > This patch fixes a bug in a nested hypervisor that heavily > switches between real-mode and long-mode. The problem is > fixed by syncing back efer into the guest vmcb on emulated > vmexit. This is vmware? IIRC their old kernel was 32-bit, so they need to switch all the time. -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Roedel, Joerg on 28 Jul 2010 04:00
On Tue, Jul 27, 2010 at 03:07:32PM -0400, Avi Kivity wrote: > On 07/27/2010 07:14 PM, Joerg Roedel wrote: > > This patch fixes a bug in a nested hypervisor that heavily > > switches between real-mode and long-mode. The problem is > > fixed by syncing back efer into the guest vmcb on emulated > > vmexit. > > This is vmware? IIRC their old kernel was 32-bit, so they need to > switch all the time. No, it is a small interal research hypervisor. But if this fixes vmware too its fine :-) Joerg -- Joerg Roedel - AMD Operating System Research Center Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach General Managers: Alberto Bozzo, Andrew Bowd Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |