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Subject[PATCH v3 2/4] KVM: arm64: Make VMID bits accessible outside of allocator
Date
Since we already set the kvm_arm_vmid_bits in the VMID allocator
init function, make it accessible outside as well so that it can
be used in the subsequent patch.

Suggested-by: Will Deacon <will@kernel.org>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
---
arch/arm64/include/asm/kvm_host.h | 1 +
arch/arm64/kernel/image-vars.h | 3 +++
arch/arm64/kvm/vmid.c | 2 +-
3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 9df15811e7df..ee0de63396ec 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -685,6 +685,7 @@ int kvm_arm_pvtime_get_attr(struct kvm_vcpu *vcpu,
int kvm_arm_pvtime_has_attr(struct kvm_vcpu *vcpu,
struct kvm_device_attr *attr);

+extern unsigned int kvm_arm_vmid_bits;
int kvm_arm_vmid_alloc_init(void);
void kvm_arm_vmid_alloc_free(void);
void kvm_arm_vmid_update(struct kvm_vmid *kvm_vmid);
diff --git a/arch/arm64/kernel/image-vars.h b/arch/arm64/kernel/image-vars.h
index c96a9a0043bf..c12963c3a055 100644
--- a/arch/arm64/kernel/image-vars.h
+++ b/arch/arm64/kernel/image-vars.h
@@ -79,6 +79,9 @@ KVM_NVHE_ALIAS(__hyp_stub_vectors);
/* Kernel symbol used by icache_is_vpipt(). */
KVM_NVHE_ALIAS(__icache_flags);

+/* VMID bits set by the KVM VMID allocator */
+KVM_NVHE_ALIAS(kvm_arm_vmid_bits);
+
/* Kernel symbols needed for cpus_have_final/const_caps checks. */
KVM_NVHE_ALIAS(arm64_const_caps_ready);
KVM_NVHE_ALIAS(cpu_hwcap_keys);
diff --git a/arch/arm64/kvm/vmid.c b/arch/arm64/kvm/vmid.c
index b2dc12549405..5584e84aed95 100644
--- a/arch/arm64/kvm/vmid.c
+++ b/arch/arm64/kvm/vmid.c
@@ -16,7 +16,7 @@
#include <asm/kvm_asm.h>
#include <asm/kvm_mmu.h>

-static unsigned int kvm_arm_vmid_bits;
+unsigned int kvm_arm_vmid_bits;
static DEFINE_RAW_SPINLOCK(cpu_vmid_lock);

static atomic64_t vmid_generation;
--
2.17.1
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