[RFC PATCH v7 03/28] KVM: arm64: Add CONFIG_KVM_ARM_SPE Kconfig option

[Alexandru Elisei <alexandru.elisei@arm.com>]

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

1. The SPE driver maintains a cpumask of physical CPUs that support SPE,
   and that 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.

The option will become user selectable after SPE support in KVM is
implemented.

Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
---
 arch/arm64/kvm/Kconfig | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig
index 449154f9a485..fece4c02b97c 100644
--- a/arch/arm64/kvm/Kconfig
+++ b/arch/arm64/kvm/Kconfig
@@ -103,5 +103,14 @@ config PKVM_STACKTRACE
 	  If unsure, or not using protected nVHE (pKVM), say N.
 
 endif # NVHE_EL2_DEBUG
+
+config KVM_ARM_SPE
+	bool
+	depends on KVM && ARM_SPE_PMU
+	default n
+	help
+	  Adds support for Statistical Profiling Extension (SPE) in virtual
+	  machines.
+
 endif # KVM
 endif # VIRTUALIZATION
-- 
2.43.0