From: Sean Christopherson <seanjc@google.com>
To: Michael Kelley <mikelley@microsoft.com>
Cc: Vineeth Pillai <viremana@linux.microsoft.com>,
Tianyu Lan <Tianyu.Lan@microsoft.com>,
Paolo Bonzini <pbonzini@redhat.com>,
vkuznets <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>,
"H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
KY Srinivasan <kys@microsoft.com>,
"x86@kernel.org" <x86@kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>
Subject: Re: [PATCH 1/7] hyperv: Detect Nested virtualization support for SVM
Date: Wed, 7 Apr 2021 22:48:44 +0000 [thread overview]
Message-ID: <YG42zNYA9uCC25In@google.com> (raw)
In-Reply-To: <MWHPR21MB159327E855DAC5BEE4B8A38DD7759@MWHPR21MB1593.namprd21.prod.outlook.com>
On Wed, Apr 07, 2021, Michael Kelley wrote:
> From: Vineeth Pillai <viremana@linux.microsoft.com> Sent: Wednesday, April 7, 2021 7:41 AM
> >
> > Detect nested features exposed by Hyper-V if SVM is enabled.
> >
> > Signed-off-by: Vineeth Pillai <viremana@linux.microsoft.com>
> > ---
> > arch/x86/kernel/cpu/mshyperv.c | 10 +++++++++-
> > 1 file changed, 9 insertions(+), 1 deletion(-)
> >
> > diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
> > index 3546d3e21787..4d364acfe95d 100644
> > --- a/arch/x86/kernel/cpu/mshyperv.c
> > +++ b/arch/x86/kernel/cpu/mshyperv.c
> > @@ -325,9 +325,17 @@ static void __init ms_hyperv_init_platform(void)
> > ms_hyperv.isolation_config_a, ms_hyperv.isolation_config_b);
> > }
> >
> > - if (ms_hyperv.hints & HV_X64_ENLIGHTENED_VMCS_RECOMMENDED) {
> > + /*
> > + * AMD does not need enlightened VMCS as VMCB is already a
> > + * datastructure in memory. We need to get the nested
> > + * features if SVM is enabled.
> > + */
> > + if (boot_cpu_has(X86_FEATURE_SVM) ||
> > + ms_hyperv.hints & HV_X64_ENLIGHTENED_VMCS_RECOMMENDED) {
> > ms_hyperv.nested_features =
> > cpuid_eax(HYPERV_CPUID_NESTED_FEATURES);
> > + pr_info("Hyper-V nested_features: 0x%x\n",
>
> Nit: Most other similar lines put the colon in a different place:
>
> pr_info("Hyper-V: nested features 0x%x\n",
>
> One of these days, I'm going to fix the ones that don't follow this
> pattern. :-)
Any reason not to use pr_fmt?
next prev parent reply other threads:[~2021-04-07 22:48 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 [this message]
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
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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