[v2,10/20] arm: Generalize execution state specific VM initialization

Commit Message

Oliver Upton June 20, 2023, 4:33 p.m. UTC

The current state of MTE initialization sticks out a bit: an
MTE-specific init routine is implemented for both aarch32 and aarch64.
Generalize on the notion of execution state specific VM initialization
in preparation for SMCCC filter creation, as the feature is only present
on aarch64.

Signed-off-by: Oliver Upton <[e-mail]>
---
 arm/aarch32/include/kvm/kvm-arch.h | 2 +-
 arm/aarch64/include/kvm/kvm-arch.h | 1 -
 arm/aarch64/kvm.c                  | 7 ++++++-
 arm/include/arm-common/kvm-arch.h  | 2 ++
 arm/kvm.c                          | 2 +-
 5 files changed, 10 insertions(+), 4 deletions(-)

Patch

diff --git a/arm/aarch32/include/kvm/kvm-arch.h b/arm/aarch32/include/kvm/kvm-arch.h
index 467fb09..c02fbea 100644
--- a/arm/aarch32/include/kvm/kvm-arch.h
+++ b/arm/aarch32/include/kvm/kvm-arch.h
@@ -6,7 +6,7 @@ 
 #define kvm__arch_get_kern_offset(...)	0x8000
 
 struct kvm;
-static inline void kvm__arch_enable_mte(struct kvm *kvm) {}
+static inline void __kvm__arm_init(struct kvm *kvm) {}
 
 #define MAX_PAGE_SIZE	SZ_4K
 
diff --git a/arm/aarch64/include/kvm/kvm-arch.h b/arm/aarch64/include/kvm/kvm-arch.h
index 02d09a4..0d3b169 100644
--- a/arm/aarch64/include/kvm/kvm-arch.h
+++ b/arm/aarch64/include/kvm/kvm-arch.h
@@ -6,7 +6,6 @@ 
 struct kvm;
 unsigned long long kvm__arch_get_kern_offset(struct kvm *kvm, int fd);
 int kvm__arch_get_ipa_limit(struct kvm *kvm);
-void kvm__arch_enable_mte(struct kvm *kvm);
 
 #define MAX_PAGE_SIZE	SZ_64K
 
diff --git a/arm/aarch64/kvm.c b/arm/aarch64/kvm.c
index 54200c9..848e690 100644
--- a/arm/aarch64/kvm.c
+++ b/arm/aarch64/kvm.c
@@ -134,7 +134,7 @@  int kvm__get_vm_type(struct kvm *kvm)
 	return KVM_VM_TYPE_ARM_IPA_SIZE(ipa_bits);
 }
 
-void kvm__arch_enable_mte(struct kvm *kvm)
+static void kvm__arch_enable_mte(struct kvm *kvm)
 {
 	struct kvm_enable_cap cap = {
 		.cap = KVM_CAP_ARM_MTE,
@@ -160,3 +160,8 @@  void kvm__arch_enable_mte(struct kvm *kvm)
 
 	pr_debug("MTE capability enabled");
 }
+
+void __kvm__arm_init(struct kvm *kvm)
+{
+	kvm__arch_enable_mte(kvm);
+}
diff --git a/arm/include/arm-common/kvm-arch.h b/arm/include/arm-common/kvm-arch.h
index 60eec02..00c4b74 100644
--- a/arm/include/arm-common/kvm-arch.h
+++ b/arm/include/arm-common/kvm-arch.h
@@ -110,4 +110,6 @@  struct kvm_arch {
 	cpu_set_t *vcpu_affinity_cpuset;
 };
 
+void __kvm__arm_init(struct kvm *kvm);
+
 #endif /* ARM_COMMON__KVM_ARCH_H */
diff --git a/arm/kvm.c b/arm/kvm.c
index 9f95823..7042d09 100644
--- a/arm/kvm.c
+++ b/arm/kvm.c
@@ -93,7 +93,7 @@  void kvm__arch_init(struct kvm *kvm)
 	if (gic__create(kvm, kvm->cfg.arch.irqchip))
 		die("Failed to create virtual GIC");
 
-	kvm__arch_enable_mte(kvm);
+	__kvm__arm_init(kvm);
 }
 
 #define FDT_ALIGN	SZ_2M