[PATCH v2 10/10] kvm: arm64: Remove unnecessary hyp mappings
From: David Brazdil <hidden>
Date: 2020-09-03 09:18:36
Also in:
kvmarm, linux-arch, lkml
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
With all nVHE per-CPU variables being part of the hyp per-CPU region, mapping them individual is not necessary any longer. They are mapped to hyp as part of the overall per-CPU region. Signed-off-by: David Brazdil <redacted> --- arch/arm64/include/asm/kvm_mmu.h | 25 +++++++------------------ arch/arm64/kvm/arm.c | 17 +---------------- 2 files changed, 8 insertions(+), 34 deletions(-)
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h
index 9db93da35606..bbe9df76ff42 100644
--- a/arch/arm64/include/asm/kvm_mmu.h
+++ b/arch/arm64/include/asm/kvm_mmu.h@@ -531,28 +531,17 @@ static inline int kvm_map_vectors(void) DECLARE_PER_CPU_READ_MOSTLY(u64, arm64_ssbd_callback_required); DECLARE_KVM_NVHE_PER_CPU(u64, arm64_ssbd_callback_required); -static inline int hyp_init_aux_data(void) +static inline void hyp_init_aux_data(void) { - int cpu, err; + int cpu; - for_each_possible_cpu(cpu) { - u64 *ptr; - - ptr = per_cpu_ptr_nvhe(arm64_ssbd_callback_required, cpu); - err = create_hyp_mappings(ptr, ptr + 1, PAGE_HYP); - if (err) - return err; - - /* Copy value from kernel to hyp. */ - *ptr = per_cpu(arm64_ssbd_callback_required, cpu); - } - return 0; + /* Copy arm64_ssbd_callback_required values from kernel to hyp. */ + for_each_possible_cpu(cpu) + *(per_cpu_ptr_nvhe(arm64_ssbd_callback_required, cpu)) = + per_cpu(arm64_ssbd_callback_required, cpu); } #else -static inline int hyp_init_aux_data(void) -{ - return 0; -} +static inline void hyp_init_aux_data(void) {} #endif #define kvm_phys_to_vttbr(addr) phys_to_ttbr(addr)
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index df7d133056ce..dfe1baa5bbb7 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c@@ -1631,22 +1631,7 @@ static int init_hyp_mode(void) } } - for_each_possible_cpu(cpu) { - kvm_host_data_t *cpu_data; - - cpu_data = per_cpu_ptr_hyp(kvm_host_data, cpu); - err = create_hyp_mappings(cpu_data, cpu_data + 1, PAGE_HYP); - - if (err) { - kvm_err("Cannot map host CPU state: %d\n", err); - goto out_err; - } - } - - err = hyp_init_aux_data(); - if (err) - kvm_err("Cannot map host auxiliary data: %d\n", err); - + hyp_init_aux_data(); return 0; out_err:
--
2.28.0.402.g5ffc5be6b7-goog
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