linux-kernel - Re: [PATCH] KVM: nVMX: nested MSR auto load/restore emulation.

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Date:	Sat, 22 Nov 2014 08:31:00 +0100
From:	Jan Kiszka <jan.kiszka@....de>
To:	Wincy Van <fanwenyi0529@...il.com>,
	Paolo Bonzini <pbonzini@...hat.com>
CC:	kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
	Bandan Das <bsd@...hat.com>
Subject: Re: [PATCH] KVM: nVMX: nested MSR auto load/restore emulation.

On 2014-11-22 05:24, Wincy Van wrote:
> Some hypervisors need MSR auto load/restore feature.
> 
> We read MSRs from vm-entry MSR load area which specified by L1,
> and load them via kvm_set_msr in the nested entry.
> When nested exit occurs, we get MSRs via kvm_get_msr, writting
> them to L1`s MSR store area. After this, we read MSRs from vm-exit
> MSR load area, and load them via kvm_set_msr.
> 
> VirtualBox will work fine with this patch.

Cool! This feature is long overdue.

Patch is unfortunately misformatted which makes it very hard to read.
Please check via linux/scripts/checkpatch.pl for the proper style.

Could you also write a corresponding kvm-unit-test (see x86/vmx_tests.c)?

Jan



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