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From: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
To: <linux-arm-kernel@lists.infradead.org>,
	<kvmarm@lists.cs.columbia.edu>, <linux-kernel@vger.kernel.org>
Cc: <maz@kernel.org>, <will@kernel.org>, <catalin.marinas@arm.com>,
	<james.morse@arm.com>, <julien.thierry.kdev@gmail.com>,
	<suzuki.poulose@arm.com>, <jean-philippe@linaro.org>,
	<Alexandru.Elisei@arm.com>, <qperret@google.com>,
	<linuxarm@huawei.com>
Subject: [PATCH v3 2/4] KVM: arm64: Make VMID bits accessible outside of allocator
Date: Thu, 29 Jul 2021 11:40:07 +0100	[thread overview]
Message-ID: <20210729104009.382-3-shameerali.kolothum.thodi@huawei.com> (raw)
In-Reply-To: <20210729104009.382-1-shameerali.kolothum.thodi@huawei.com>

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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  parent reply	other threads:[~2021-07-29 10:46 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-29 10:40 [PATCH v3 0/4] kvm/arm: New VMID allocator based on asid Shameer Kolothum
2021-07-29 10:40 ` [PATCH v3 1/4] KVM: arm64: Introduce a new VMID allocator for KVM Shameer Kolothum
2021-08-03 11:38   ` Will Deacon
2021-08-03 12:12     ` Shameerali Kolothum Thodi
2021-07-29 10:40 ` Shameer Kolothum [this message]
2021-07-29 10:40 ` [PATCH v3 3/4] KVM: arm64: Align the VMID allocation with the arm64 ASID one Shameer Kolothum
2021-07-29 10:40 ` [PATCH v3 4/4] KVM: arm64: Clear active_vmids on vCPU schedule out Shameer Kolothum
2021-08-03 11:40   ` Will Deacon
2021-08-03 12:55     ` Shameerali Kolothum Thodi
2021-08-03 15:30       ` Will Deacon
2021-08-03 15:56         ` Shameerali Kolothum Thodi
2021-08-06 12:24         ` Shameerali Kolothum Thodi
2021-08-09 13:09           ` Will Deacon
2021-08-09 13:48             ` Shameerali Kolothum Thodi
2021-08-11  8:47         ` Shameerali Kolothum Thodi
2021-10-11  6:06         ` Shameerali Kolothum Thodi

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