linux-kernel - [tip: x86/cpu] KVM: VMX: Allow KVM_INTEL when building for Centaur and/or Zhaoxin CPUs

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Message-ID: <157899701088.1022.10241551646411306885.tip-bot2@tip-bot2>
Date:   Tue, 14 Jan 2020 10:16:50 -0000
From:   "tip-bot2 for Sean Christopherson" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Sean Christopherson <sean.j.christopherson@...el.com>,
        Borislav Petkov <bp@...e.de>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tip: x86/cpu] KVM: VMX: Allow KVM_INTEL when building for Centaur
 and/or Zhaoxin CPUs

The following commit has been merged into the x86/cpu branch of tip:

Commit-ID:     8f63aaf5c493c6502a058585cdfa3c71cdf8c44a
Gitweb:        https://git.kernel.org/tip/8f63aaf5c493c6502a058585cdfa3c71cdf8c44a
Author:        Sean Christopherson <sean.j.christopherson@...el.com>
AuthorDate:    Fri, 20 Dec 2019 20:45:13 -08:00
Committer:     Borislav Petkov <bp@...e.de>
CommitterDate: Mon, 13 Jan 2020 19:35:33 +01:00

KVM: VMX: Allow KVM_INTEL when building for Centaur and/or Zhaoxin CPUs

Change the dependency for KVM_INTEL, i.e. KVM w/ VMX, from Intel CPUs to
any CPU that supports the IA32_FEAT_CTL MSR and thus VMX functionality.
This effectively allows building KVM_INTEL for Centaur and Zhaoxin CPUs.

Signed-off-by: Sean Christopherson <sean.j.christopherson@...el.com>
Signed-off-by: Borislav Petkov <bp@...e.de>
Link: https://lkml.kernel.org/r/20191221044513.21680-20-sean.j.christopherson@intel.com
---
 arch/x86/kvm/Kconfig | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
index 840e125..991019d 100644
--- a/arch/x86/kvm/Kconfig
+++ b/arch/x86/kvm/Kconfig
@@ -60,13 +60,11 @@ config KVM
 	  If unsure, say N.
 
 config KVM_INTEL
-	tristate "KVM for Intel processors support"
-	depends on KVM
-	# for perf_guest_get_msrs():
-	depends on CPU_SUP_INTEL
+	tristate "KVM for Intel (and compatible) processors support"
+	depends on KVM && IA32_FEAT_CTL
 	---help---
-	  Provides support for KVM on Intel processors equipped with the VT
-	  extensions.
+	  Provides support for KVM on processors equipped with Intel's VT
+	  extensions, a.k.a. Virtual Machine Extensions (VMX).
 
 	  To compile this as a module, choose M here: the module
 	  will be called kvm-intel.