diff options
Diffstat (limited to 'arch/arm64/kvm/hyp/nvhe/hyp-smp.c')
| -rw-r--r-- | arch/arm64/kvm/hyp/nvhe/hyp-smp.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp/nvhe/hyp-smp.c b/arch/arm64/kvm/hyp/nvhe/hyp-smp.c new file mode 100644 index 000000000..9f54833af --- /dev/null +++ b/arch/arm64/kvm/hyp/nvhe/hyp-smp.c @@ -0,0 +1,38 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2020 - Google LLC + * Author: David Brazdil <dbrazdil@google.com> + */ + +#include <asm/kvm_asm.h> +#include <asm/kvm_hyp.h> +#include <asm/kvm_mmu.h> + +/* + * nVHE copy of data structures tracking available CPU cores. + * Only entries for CPUs that were online at KVM init are populated. + * Other CPUs should not be allowed to boot because their features were + * not checked against the finalized system capabilities. + */ +u64 __ro_after_init hyp_cpu_logical_map[NR_CPUS] = { [0 ... NR_CPUS-1] = INVALID_HWID }; + +u64 cpu_logical_map(unsigned int cpu) +{ + BUG_ON(cpu >= ARRAY_SIZE(hyp_cpu_logical_map)); + + return hyp_cpu_logical_map[cpu]; +} + +unsigned long __hyp_per_cpu_offset(unsigned int cpu) +{ + unsigned long *cpu_base_array; + unsigned long this_cpu_base; + unsigned long elf_base; + + BUG_ON(cpu >= ARRAY_SIZE(kvm_arm_hyp_percpu_base)); + + cpu_base_array = (unsigned long *)&kvm_arm_hyp_percpu_base; + this_cpu_base = kern_hyp_va(cpu_base_array[cpu]); + elf_base = (unsigned long)&__per_cpu_start; + return this_cpu_base - elf_base; +} |