[PATCH v1 7/7] KVM: arm64: Consolidate initializing the host data's fpsimd_state/sve in pKVM

[Fuad Tabba]

Now that we have introduced finalize_init_hyp_mode(), lets
consolidate the initializing of the host_data fpsimd_state and
sve state.

Signed-off-by: Fuad Tabba <tabba at google.com>
---
 arch/arm64/include/asm/kvm_host.h      | 10 ++++++++--
 arch/arm64/kvm/arm.c                   | 18 ++++++++++++------
 arch/arm64/kvm/hyp/include/nvhe/pkvm.h |  1 -
 arch/arm64/kvm/hyp/nvhe/pkvm.c         | 11 -----------
 arch/arm64/kvm/hyp/nvhe/setup.c        |  1 -
 5 files changed, 20 insertions(+), 21 deletions(-)

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 7b3745ef1d73..8a170f314498 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -536,8 +536,14 @@ struct kvm_cpu_context {
 struct kvm_host_data {
 	struct kvm_cpu_context host_ctxt;
 
-	struct user_fpsimd_state *fpsimd_state;	/* hyp VA */
-	struct user_sve_state *sve_state;	/* hyp VA */
+	/*
+	 * All pointers in this union are hyp VA.
+	 * sve_state is only used in pKVM and if system_supports_sve().
+	 */
+	union {
+		struct user_fpsimd_state *fpsimd_state;
+		struct user_sve_state *sve_state;
+	};
 
 	/* Ownership of the FP regs */
 	enum {
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index a9b1b0e9c319..a1c7e0ad6951 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -2445,14 +2445,20 @@ static void finalize_init_hyp_mode(void)
 {
 	int cpu;
 
-	if (!is_protected_kvm_enabled() || !system_supports_sve())
-		return;
-
 	for_each_possible_cpu(cpu) {
-		struct user_sve_state *sve_state;
+		if (system_supports_sve() && is_protected_kvm_enabled()) {
+			struct user_sve_state *sve_state;
 
-		sve_state = per_cpu_ptr_nvhe_sym(kvm_host_data, cpu)->sve_state;
-		per_cpu_ptr_nvhe_sym(kvm_host_data, cpu)->sve_state = kern_hyp_va(sve_state);
+			sve_state = per_cpu_ptr_nvhe_sym(kvm_host_data, cpu)->sve_state;
+			per_cpu_ptr_nvhe_sym(kvm_host_data, cpu)->sve_state =
+				kern_hyp_va(sve_state);
+		} else {
+			struct user_fpsimd_state *fpsimd_state;
+
+			fpsimd_state = &per_cpu_ptr_nvhe_sym(kvm_host_data, cpu)->host_ctxt.fp_regs;
+			per_cpu_ptr_nvhe_sym(kvm_host_data, cpu)->fpsimd_state =
+				kern_hyp_va(fpsimd_state);
+		}
 	}
 }
 
diff --git a/arch/arm64/kvm/hyp/include/nvhe/pkvm.h b/arch/arm64/kvm/hyp/include/nvhe/pkvm.h
index 22f374e9f532..24a9a8330d19 100644
--- a/arch/arm64/kvm/hyp/include/nvhe/pkvm.h
+++ b/arch/arm64/kvm/hyp/include/nvhe/pkvm.h
@@ -59,7 +59,6 @@ static inline bool pkvm_hyp_vcpu_is_protected(struct pkvm_hyp_vcpu *hyp_vcpu)
 }
 
 void pkvm_hyp_vm_table_init(void *tbl);
-void pkvm_host_fpsimd_state_init(void);
 
 int __pkvm_init_vm(struct kvm *host_kvm, unsigned long vm_hva,
 		   unsigned long pgd_hva);
diff --git a/arch/arm64/kvm/hyp/nvhe/pkvm.c b/arch/arm64/kvm/hyp/nvhe/pkvm.c
index feb27b4ce459..ea67fcbf8376 100644
--- a/arch/arm64/kvm/hyp/nvhe/pkvm.c
+++ b/arch/arm64/kvm/hyp/nvhe/pkvm.c
@@ -249,17 +249,6 @@ void pkvm_hyp_vm_table_init(void *tbl)
 	vm_table = tbl;
 }
 
-void pkvm_host_fpsimd_state_init(void)
-{
-	unsigned long i;
-
-	for (i = 0; i < hyp_nr_cpus; i++) {
-		struct kvm_host_data *host_data = per_cpu_ptr(&kvm_host_data, i);
-
-		host_data->fpsimd_state = &host_data->host_ctxt.fp_regs;
-	}
-}
-
 /*
  * Return the hyp vm structure corresponding to the handle.
  */
diff --git a/arch/arm64/kvm/hyp/nvhe/setup.c b/arch/arm64/kvm/hyp/nvhe/setup.c
index 5c8cd806efb9..84f766ab1810 100644
--- a/arch/arm64/kvm/hyp/nvhe/setup.c
+++ b/arch/arm64/kvm/hyp/nvhe/setup.c
@@ -324,7 +324,6 @@ void __noreturn __pkvm_init_finalise(void)
 		goto out;
 
 	pkvm_hyp_vm_table_init(vm_table_base);
-	pkvm_host_fpsimd_state_init();
 out:
 	/*
 	 * We tail-called to here from handle___pkvm_init() and will not return,
-- 
2.45.0.rc1.225.g2a3ae87e7f-goog