[79/89] KVM: arm64: Add is_pkvm_initialized() helper

Commit Message

Will Deacon May 19, 2022, 1:41 p.m. UTC

From: Quentin Perret <[e-mail]>

Add a helper allowing to check when the pkvm static key is enabled to
ease the introduction of pkvm hooks in other parts of the code.

Signed-off-by: Quentin Perret <[e-mail]>
---
 arch/arm64/include/asm/virt.h | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

Patch

diff --git a/arch/arm64/include/asm/virt.h b/arch/arm64/include/asm/virt.h
index 0e80db4327b6..3d5bfcdb49aa 100644
--- a/arch/arm64/include/asm/virt.h
+++ b/arch/arm64/include/asm/virt.h
@@ -74,6 +74,12 @@  void __hyp_reset_vectors(void);
 
 DECLARE_STATIC_KEY_FALSE(kvm_protected_mode_initialized);
 
+static inline bool is_pkvm_initialized(void)
+{
+	return IS_ENABLED(CONFIG_KVM) &&
+	       static_branch_likely(&kvm_protected_mode_initialized);
+}
+
 /* Reports the availability of HYP mode */
 static inline bool is_hyp_mode_available(void)
 {
@@ -81,8 +87,7 @@  static inline bool is_hyp_mode_available(void)
 	 * If KVM protected mode is initialized, all CPUs must have been booted
 	 * in EL2. Avoid checking __boot_cpu_mode as CPUs now come up in EL1.
 	 */
-	if (IS_ENABLED(CONFIG_KVM) &&
-	    static_branch_likely(&kvm_protected_mode_initialized))
+	if (is_pkvm_initialized())
 		return true;
 
 	return (__boot_cpu_mode[0] == BOOT_CPU_MODE_EL2 &&
@@ -96,8 +101,7 @@  static inline bool is_hyp_mode_mismatched(void)
 	 * If KVM protected mode is initialized, all CPUs must have been booted
 	 * in EL2. Avoid checking __boot_cpu_mode as CPUs now come up in EL1.
 	 */
-	if (IS_ENABLED(CONFIG_KVM) &&
-	    static_branch_likely(&kvm_protected_mode_initialized))
+	if (is_pkvm_initialized())
 		return false;
 
 	return __boot_cpu_mode[0] != __boot_cpu_mode[1];