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Date:   Wed, 28 Apr 2021 13:47:28 +0000
From:   Wei Liu <wei.liu@kernel.org>
To:     Vineeth Pillai <viremana@linux.microsoft.com>
Cc:     Lan Tianyu <Tianyu.Lan@microsoft.com>,
        Michael Kelley <mikelley@microsoft.com>,
        Paolo Bonzini <pbonzini@redhat.com>,
        Sean Christopherson <seanjc@google.com>,
        Vitaly Kuznetsov <vkuznets@redhat.com>,
        Tom Lendacky <thomas.lendacky@amd.com>,
        Wanpeng Li <wanpengli@tencent.com>,
        Jim Mattson <jmattson@google.com>,
        Joerg Roedel <joro@8bytes.org>, Wei Liu <wei.liu@kernel.org>,
        Stephen Hemminger <sthemmin@microsoft.com>,
        Haiyang Zhang <haiyangz@microsoft.com>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "K. Y. Srinivasan" <kys@microsoft.com>, x86@kernel.org,
        kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-hyperv@vger.kernel.org
Subject: Re: [PATCH v4 2/7] hyperv: SVM enlightened TLB flush support flag
Message-ID: <20210428134728.jmu6bnjemhid3up7@liuwe-devbox-debian-v2>
References: <cover.1619556430.git.viremana@linux.microsoft.com>
 <cce3e52fde732ccdc7a34d2eb1e2d59917e4e5e0.1619556430.git.viremana@linux.microsoft.com>
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On Tue, Apr 27, 2021 at 08:54:51PM +0000, Vineeth Pillai wrote:
> Bit 22 of HYPERV_CPUID_FEATURES.EDX is specific to SVM and specifies
> support for enlightened TLB flush. With this enlightenment enabled,
> ASID invalidations flushes only gva->hpa entries. To flush TLB entries
> derived from NPT, hypercalls should be used
> (HvFlushGuestPhysicalAddressSpace or HvFlushGuestPhysicalAddressList)
> 
> Signed-off-by: Vineeth Pillai <viremana@linux.microsoft.com>

Acked-by: Wei Liu <wei.liu@kernel.org>