From 8a856ad6da0a664e7152aadbd7a1aee84ec3eedc Mon Sep 17 00:00:00 2001 From: Shameer Kolothum Date: Mon, 22 Nov 2021 12:18:42 +0000 Subject: [PATCH] UPSTREAM: KVM: arm64: Make VMID bits accessible outside of allocator 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 Signed-off-by: Shameer Kolothum Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20211122121844.867-3-shameerali.kolothum.thodi@huawei.com (cherry picked from commit f8051e960922a9de8e42159103d5d9c697ef17ec) Signed-off-by: Will Deacon Bug: 233587962 Bug: 233588291 Change-Id: Ic7c2ce90a07de86aee9c4961809e5420ccd67199 --- 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 3b61625e68d0..22c0fcde57c1 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -695,6 +695,7 @@ 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 55a1ced8eb77..241c86b67d01 100644 --- a/arch/arm64/kernel/image-vars.h +++ b/arch/arm64/kernel/image-vars.h @@ -83,6 +83,9 @@ 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 aa01c97f7df0..9aff692b6b7d 100644 --- a/arch/arm64/kvm/vmid.c +++ b/arch/arm64/kvm/vmid.c @@ -16,7 +16,7 @@ #include #include -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;