diff options
| author | David Brazdil <dbrazdil@google.com> | 2020-09-22 23:49:09 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2020-09-30 10:37:14 +0300 |
| commit | 30c953911c4370bfb622ee1c2fcc7e78c84df800 (patch) | |
| tree | 525991f0ee45ff0992dae3b2858030d5f622b1d2 /arch/arm64/include/asm/kvm_asm.h | |
| parent | 2a1198c9b436402582f7beed57028044b819329c (diff) | |
| download | linux-30c953911c4370bfb622ee1c2fcc7e78c84df800.tar.xz | |
kvm: arm64: Set up hyp percpu data for nVHE
Add hyp percpu section to linker script and rename the corresponding ELF
sections of hyp/nvhe object files. This moves all nVHE-specific percpu
variables to the new hyp percpu section.
Allocate sufficient amount of memory for all percpu hyp regions at global KVM
init time and create corresponding hyp mappings.
The base addresses of hyp percpu regions are kept in a dynamically allocated
array in the kernel.
Add NULL checks in PMU event-reset code as it may run before KVM memory is
initialized.
Signed-off-by: David Brazdil <dbrazdil@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20200922204910.7265-10-dbrazdil@google.com
Diffstat (limited to 'arch/arm64/include/asm/kvm_asm.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_asm.h | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h index 911d91787fa0..863f669d4dc8 100644 --- a/arch/arm64/include/asm/kvm_asm.h +++ b/arch/arm64/include/asm/kvm_asm.h @@ -66,8 +66,19 @@ #define CHOOSE_VHE_SYM(sym) sym #define CHOOSE_NVHE_SYM(sym) kvm_nvhe_sym(sym) -#define this_cpu_ptr_nvhe_sym(sym) this_cpu_ptr(&kvm_nvhe_sym(sym)) -#define per_cpu_ptr_nvhe_sym(sym, cpu) per_cpu_ptr(&kvm_nvhe_sym(sym), cpu) +/* + * Compute pointer to a symbol defined in nVHE percpu region. + * Returns NULL if percpu memory has not been allocated yet. + */ +#define this_cpu_ptr_nvhe_sym(sym) per_cpu_ptr_nvhe_sym(sym, smp_processor_id()) +#define per_cpu_ptr_nvhe_sym(sym, cpu) \ + ({ \ + unsigned long base, off; \ + base = kvm_arm_hyp_percpu_base[cpu]; \ + off = (unsigned long)&CHOOSE_NVHE_SYM(sym) - \ + (unsigned long)&CHOOSE_NVHE_SYM(__per_cpu_start); \ + base ? (typeof(CHOOSE_NVHE_SYM(sym))*)(base + off) : NULL; \ + }) #ifndef __KVM_NVHE_HYPERVISOR__ /* @@ -117,6 +128,10 @@ DECLARE_KVM_HYP_SYM(__kvm_hyp_vector); #define __kvm_hyp_init CHOOSE_NVHE_SYM(__kvm_hyp_init) #define __kvm_hyp_vector CHOOSE_HYP_SYM(__kvm_hyp_vector) +extern unsigned long kvm_arm_hyp_percpu_base[NR_CPUS]; +DECLARE_KVM_NVHE_SYM(__per_cpu_start); +DECLARE_KVM_NVHE_SYM(__per_cpu_end); + #ifdef CONFIG_KVM_INDIRECT_VECTORS extern atomic_t arm64_el2_vector_last_slot; DECLARE_KVM_HYP_SYM(__bp_harden_hyp_vecs); |