linux-kernel - [PATCH kvmtool v4 07/15] arm64: Expose ARM64_CORE

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Message-ID: <20250930103130.197534-9-suzuki.poulose@arm.com>
Date: Tue, 30 Sep 2025 11:31:22 +0100
From: Suzuki K Poulose <suzuki.poulose@....com>
To: kvmarm@...ts.linux.dev
Cc: kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	will@...nel.org,
	oliver.upton@...ux.dev,
	maz@...nel.org,
	alexandru.elisei@....com,
	aneesh.kumar@...nel.org,
	steven.price@....com,
	tabba@...gle.com,
	Suzuki K Poulose <suzuki.poulose@....com>
Subject: [PATCH kvmtool v4 07/15] arm64: Expose ARM64_CORE_REG() for general use

From: Oliver Upton <oliver.upton@...ux.dev>

Expose the macro such that it may be used to get SMCCC arguments in a
future change.

Signed-off-by: Oliver Upton <oliver.upton@...ux.dev>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
---
 arm64/include/kvm/kvm-cpu-arch.h | 16 ++++++++++++++++
 arm64/kvm-cpu.c                  | 16 ----------------
 2 files changed, 16 insertions(+), 16 deletions(-)

diff --git a/arm64/include/kvm/kvm-cpu-arch.h b/arm64/include/kvm/kvm-cpu-arch.h
index 2f189abc..dbd90647 100644
--- a/arm64/include/kvm/kvm-cpu-arch.h
+++ b/arm64/include/kvm/kvm-cpu-arch.h
@@ -67,4 +67,20 @@ unsigned long kvm_cpu__get_vcpu_mpidr(struct kvm_cpu *vcpu);
 int kvm_cpu__setup_pvtime(struct kvm_cpu *vcpu);
 int kvm_cpu__teardown_pvtime(struct kvm *kvm);
 
+static inline __u64 __core_reg_id(__u64 offset)
+{
+	__u64 id = KVM_REG_ARM64 | KVM_REG_ARM_CORE | offset;
+
+	if (offset < KVM_REG_ARM_CORE_REG(fp_regs))
+		id |= KVM_REG_SIZE_U64;
+	else if (offset < KVM_REG_ARM_CORE_REG(fp_regs.fpsr))
+		id |= KVM_REG_SIZE_U128;
+	else
+		id |= KVM_REG_SIZE_U32;
+
+	return id;
+}
+
+#define ARM64_CORE_REG(x) __core_reg_id(KVM_REG_ARM_CORE_REG(x))
+
 #endif /* ARM_COMMON__KVM_CPU_ARCH_H */
diff --git a/arm64/kvm-cpu.c b/arm64/kvm-cpu.c
index c7286484..f8e08b5d 100644
--- a/arm64/kvm-cpu.c
+++ b/arm64/kvm-cpu.c
@@ -238,22 +238,6 @@ void kvm_cpu__show_page_tables(struct kvm_cpu *vcpu)
 {
 }
 
-static __u64 __core_reg_id(__u64 offset)
-{
-	__u64 id = KVM_REG_ARM64 | KVM_REG_ARM_CORE | offset;
-
-	if (offset < KVM_REG_ARM_CORE_REG(fp_regs))
-		id |= KVM_REG_SIZE_U64;
-	else if (offset < KVM_REG_ARM_CORE_REG(fp_regs.fpsr))
-		id |= KVM_REG_SIZE_U128;
-	else
-		id |= KVM_REG_SIZE_U32;
-
-	return id;
-}
-
-#define ARM64_CORE_REG(x) __core_reg_id(KVM_REG_ARM_CORE_REG(x))
-
 unsigned long kvm_cpu__get_vcpu_mpidr(struct kvm_cpu *vcpu)
 {
 	struct kvm_one_reg reg;
-- 
2.43.0