linux-kernel - [RFC PATCH v4 13/39] KVM: arm64: Add CONFIG_KVM_ARM

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Message-Id: <20210825161815.266051-14-alexandru.elisei@arm.com>
Date:   Wed, 25 Aug 2021 17:17:49 +0100
From:   Alexandru Elisei <alexandru.elisei@....com>
To:     maz@...nel.org, james.morse@....com, suzuki.poulose@....com,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        will@...nel.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH v4 13/39] KVM: arm64: Add CONFIG_KVM_ARM_SPE Kconfig option

Add a new configuration option that will be used for KVM SPE emulation.
CONFIG_KVM_ARM_SPE depends on the SPE driver being builtin because:

1. The cpumask of physical CPUs that support SPE will be used by KVM to
   emulate SPE on heterogeneous systems.

2. KVM will rely on the SPE driver enabling the SPE interrupt at the GIC
   level.

Signed-off-by: Alexandru Elisei <alexandru.elisei@....com>
---
 arch/arm64/kvm/Kconfig | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig
index a4eba0908bfa..c6ad5a05efb3 100644
--- a/arch/arm64/kvm/Kconfig
+++ b/arch/arm64/kvm/Kconfig
@@ -46,6 +46,14 @@ if KVM
 
 source "virt/kvm/Kconfig"
 
+config KVM_ARM_SPE
+	bool "Virtual Statistical Profiling Extension (SPE) support"
+	depends on ARM_SPE_PMU=y
+	default y
+	help
+	  Adds support for Statistical Profiling Extension (SPE) in virtual
+	  machines.
+
 endif # KVM
 
 endif # VIRTUALIZATION
-- 
2.33.0