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| author |   James Morse <james.morse@arm.com> | 2018-01-08 15:38:04 +0000 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2018-01-13 10:44:14 +0000 |
| commit | 36989e7fd386a9a5822c48691473863f8fbb404d (patch) | |
| tree | 3691d9acbc79860ecc7878e6d2d7d3a6f3b27ca4 /virt | |
| parent | KVM: arm64: Store vcpu on the stack during __guest_enter() (diff) | |
| download | linux-dev-36989e7fd386a9a5822c48691473863f8fbb404d.tar.xz linux-dev-36989e7fd386a9a5822c48691473863f8fbb404d.zip | |
KVM: arm/arm64: Convert kvm_host_cpu_state to a static per-cpu allocation
kvm_host_cpu_state is a per-cpu allocation made from kvm_arch_init()
used to store the host EL1 registers when KVM switches to a guest.
Make it easier for ASM to generate pointers into this per-cpu memory
by making it a static allocation.
Signed-off-by: James Morse <james.morse@arm.com>
Acked-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/arm/arm.c | 18 |
1 files changed, 3 insertions, 15 deletions
diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c index 2df6a5c42f77..2fc6009a766c 100644 --- a/virt/kvm/arm/arm.c +++ b/virt/kvm/arm/arm.c @@ -53,8 +53,8 @@ __asm__(".arch_extension virt"); #endif +DEFINE_PER_CPU(kvm_cpu_context_t, kvm_host_cpu_state); static DEFINE_PER_CPU(unsigned long, kvm_arm_hyp_stack_page); -static kvm_cpu_context_t __percpu *kvm_host_cpu_state; /* Per-CPU variable containing the currently running vcpu. */ static DEFINE_PER_CPU(struct kvm_vcpu *, kvm_arm_running_vcpu); @@ -354,7 +354,7 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) } vcpu->cpu = cpu; - vcpu->arch.host_cpu_context = this_cpu_ptr(kvm_host_cpu_state); + vcpu->arch.host_cpu_context = this_cpu_ptr(&kvm_host_cpu_state); kvm_arm_set_running_vcpu(vcpu); kvm_vgic_load(vcpu); @@ -1272,19 +1272,8 @@ static inline void hyp_cpu_pm_exit(void) } #endif -static void teardown_common_resources(void) -{ - free_percpu(kvm_host_cpu_state); -} - static int init_common_resources(void) { - kvm_host_cpu_state = alloc_percpu(kvm_cpu_context_t); - if (!kvm_host_cpu_state) { - kvm_err("Cannot allocate host CPU state\n"); - return -ENOMEM; - } - /* set size of VMID supported by CPU */ kvm_vmid_bits = kvm_get_vmid_bits(); kvm_info("%d-bit VMID\n", kvm_vmid_bits); @@ -1426,7 +1415,7 @@ static int init_hyp_mode(void) for_each_possible_cpu(cpu) { kvm_cpu_context_t *cpu_ctxt; - cpu_ctxt = per_cpu_ptr(kvm_host_cpu_state, cpu); + cpu_ctxt = per_cpu_ptr(&kvm_host_cpu_state, cpu); err = create_hyp_mappings(cpu_ctxt, cpu_ctxt + 1, PAGE_HYP); if (err) { @@ -1550,7 +1539,6 @@ out_hyp: if (!in_hyp_mode) teardown_hyp_mode(); out_err: - teardown_common_resources(); return err; } |