From: Paolo Bonzini <pbonzini@redhat.com>
To: Vineeth Pillai <viremana@linux.microsoft.com>,
Lan Tianyu <Tianyu.Lan@microsoft.com>,
Michael Kelley <mikelley@microsoft.com>,
Sean Christopherson <seanjc@google.com>,
Vitaly Kuznetsov <vkuznets@redhat.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>
Cc: "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 4/7] KVM: SVM: hyper-v: Nested enlightenments in VMCB
Date: Thu, 8 Apr 2021 17:44:59 +0200 [thread overview]
Message-ID: <5927967d-c5a2-6df9-9aff-4b92c207df09@redhat.com> (raw)
In-Reply-To: <e9de12a81ab31613fb55d5c1308ca0ca050ced4c.1617804573.git.viremana@linux.microsoft.com>
On 07/04/21 16:41, Vineeth Pillai wrote:
> +#define VMCB_ALL_CLEAN_MASK (__CLEAN_MASK | (1U << VMCB_HV_NESTED_ENLIGHTENMENTS))
> +#else
> +#define VMCB_ALL_CLEAN_MASK __CLEAN_MASK
> +#endif
I think this should depend on whether KVM is running on top of Hyper-V;
not on whether KVM is *compiled* with Hyper-V support.
So you should turn VMCB_ALL_CLEAN_MASK into a __read_mostly variable.
Paolo
> /* TPR and CR2 are always written before VMRUN */
> #define VMCB_ALWAYS_DIRTY_MASK ((1U << VMCB_INTR) | (1U << VMCB_CR2))
>
> @@ -230,7 +251,7 @@ static inline void vmcb_mark_all_dirty(struct vmcb *vmcb)
>
> static inline void vmcb_mark_all_clean(struct vmcb *vmcb)
> {
> - vmcb->control.clean = ((1 << VMCB_DIRTY_MAX) - 1)
> + vmcb->control.clean = VMCB_ALL_CLEAN_MASK
> & ~VMCB_ALWAYS_DIRTY_MASK;
> }
next prev parent reply other threads:[~2021-04-08 15:45 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-07 14:41 [PATCH 0/7] Hyper-V nested virt enlightenments for SVM Vineeth Pillai
2021-04-07 14:41 ` [PATCH 1/7] hyperv: Detect Nested virtualization support " Vineeth Pillai
2021-04-07 16:09 ` Borislav Petkov
2021-04-07 19:55 ` Michael Kelley
2021-04-07 22:48 ` Sean Christopherson
2021-04-08 13:26 ` Vineeth Pillai
2021-04-08 11:06 ` Vitaly Kuznetsov
2021-04-08 13:15 ` Vineeth Pillai
2021-04-08 15:24 ` Sean Christopherson
2021-04-09 12:23 ` Vineeth Pillai
2021-04-07 14:41 ` [PATCH 2/7] hyperv: SVM enlightened TLB flush support flag Vineeth Pillai
2021-04-07 19:56 ` Michael Kelley
2021-04-08 13:45 ` Vineeth Pillai
2021-04-07 14:41 ` [PATCH 3/7] KVM: x86: hyper-v: Move the remote TLB flush logic out of vmx Vineeth Pillai
2021-04-08 11:14 ` Vitaly Kuznetsov
2021-04-08 13:18 ` Vineeth Pillai
2021-04-07 14:41 ` [PATCH 4/7] KVM: SVM: hyper-v: Nested enlightenments in VMCB Vineeth Pillai
2021-04-08 15:44 ` Paolo Bonzini [this message]
2021-04-09 12:24 ` Vineeth Pillai
2021-04-07 14:41 ` [PATCH 5/7] KVM: SVM: hyper-v: Remote TLB flush for SVM Vineeth Pillai
2021-04-08 11:18 ` Vitaly Kuznetsov
2021-04-08 13:19 ` Vineeth Pillai
2021-04-07 14:41 ` [PATCH 6/7] KVM: SVM: hyper-v: Enlightened MSR-Bitmap support Vineeth Pillai
2021-04-08 11:22 ` Vitaly Kuznetsov
2021-04-08 15:47 ` Paolo Bonzini
2021-04-07 14:41 ` [PATCH 7/7] KVM: SVM: hyper-v: Direct Virtual Flush support Vineeth Pillai
2021-04-08 11:25 ` Vitaly Kuznetsov
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