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Re: [Xen-devel] [PATCH] x86/vmx: Fixup removals from MSR load-lists

To: Igor Druzhinin <igor.druzhinin@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>

From: "Tian, Kevin" <kevin.tian@xxxxxxxxx>

Date: Tue, 9 Apr 2019 03:03:37 +0000

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Cc: "andrew.cooper3@xxxxxxxxxx" <andrew.cooper3@xxxxxxxxxx>, "wei.liu2@xxxxxxxxxx" <wei.liu2@xxxxxxxxxx>, "Nakajima, Jun" <jun.nakajima@xxxxxxxxx>, "jbeulich@xxxxxxxx" <jbeulich@xxxxxxxx>, "roger.pau@xxxxxxxxxx" <roger.pau@xxxxxxxxxx>

Delivery-date: Tue, 09 Apr 2019 03:03:49 +0000

Dlp-product: dlpe-windows

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Dlp-version: 11.0.400.15

List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

Thread-index: AQHU6vSlNwC9RuX2LUiKFdcNaHP04KYzK0fw

Thread-topic: [PATCH] x86/vmx: Fixup removals from MSR load-lists

> From: Igor Druzhinin [mailto:igor.druzhinin@xxxxxxxxxx] > Sent: Thursday, April 4, 2019 10:42 PM > > Commit fd32dcfe ("x86/vmx: Don't leak EFER.NXE into guest context") > introduced a regression on Harpertown and earlier cores (Gen 1 VT-x) > where as soon as guest EFER becomes equal to Xen EFER > (almost any 64-bit VM) stale version of EFER is incorrectly > loaded into a guest causing almost immediate guest failure. > > Signed-off-by: Igor Druzhinin <igor.druzhinin@xxxxxxxxxx> Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx> _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel

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