diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h index 6a682d66a6404bab8bbcd9236409b3390c16f749..6026cbd204ae9512f2e5188d3d462a4f66d83611 100644 --- a/arch/arm64/include/asm/kvm_asm.h +++ b/arch/arm64/include/asm/kvm_asm.h @@ -60,12 +60,17 @@ DECLARE_KVM_VHE_SYM(sym); \ DECLARE_KVM_NVHE_SYM(sym) -/* Translate a kernel address of @sym into its equivalent linear mapping */ -#define kvm_ksym_ref(sym) \ +#define CHOOSE_VHE_SYM(sym) sym +#define CHOOSE_NVHE_SYM(sym) kvm_nvhe_sym(sym) +#define CHOOSE_HYP_SYM(sym) (has_vhe() ? CHOOSE_VHE_SYM(sym) \ + : CHOOSE_NVHE_SYM(sym)) + +/* Translate a kernel address @ptr into its equivalent linear mapping */ +#define kvm_ksym_ref(ptr) \ ({ \ - void *val = &sym; \ + void *val = (ptr); \ if (!is_kernel_in_hyp_mode()) \ - val = lm_alias(&sym); \ + val = lm_alias((ptr)); \ val; \ }) #define kvm_ksym_ref_nvhe(sym) kvm_ksym_ref(kvm_nvhe_sym(sym)) @@ -76,7 +81,14 @@ struct kvm_vcpu; extern char __kvm_hyp_init[]; extern char __kvm_hyp_init_end[]; -extern char __kvm_hyp_vector[]; +DECLARE_KVM_HYP_SYM(__kvm_hyp_vector); +#define __kvm_hyp_vector CHOOSE_HYP_SYM(__kvm_hyp_vector) + +#ifdef CONFIG_KVM_INDIRECT_VECTORS +extern atomic_t arm64_el2_vector_last_slot; +DECLARE_KVM_HYP_SYM(__bp_harden_hyp_vecs); +#define __bp_harden_hyp_vecs CHOOSE_HYP_SYM(__bp_harden_hyp_vecs) +#endif extern void __kvm_flush_vm_context(void); extern void __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa); diff --git a/arch/arm64/include/asm/mmu.h b/arch/arm64/include/asm/mmu.h index 8444df0001813ccb681074c3f107019ffb391215..a7a5ecaa2e836b509c373feaa9c5474df38c73b9 100644 --- a/arch/arm64/include/asm/mmu.h +++ b/arch/arm64/include/asm/mmu.h @@ -45,13 +45,6 @@ struct bp_hardening_data { bp_hardening_cb_t fn; }; -#if (defined(CONFIG_HARDEN_BRANCH_PREDICTOR) || \ - defined(CONFIG_HARDEN_EL2_VECTORS)) - -extern char __bp_harden_hyp_vecs[]; -extern atomic_t arm64_el2_vector_last_slot; -#endif /* CONFIG_HARDEN_BRANCH_PREDICTOR || CONFIG_HARDEN_EL2_VECTORS */ - #ifdef CONFIG_HARDEN_BRANCH_PREDICTOR DECLARE_PER_CPU_READ_MOSTLY(struct bp_hardening_data, bp_hardening_data); diff --git a/arch/arm64/kernel/image-vars.h b/arch/arm64/kernel/image-vars.h index 36444bac6a0530d7d51764bb6fe862f182229ac5..f28da486b75afa454eb2677a53205abfc1930cb5 100644 --- a/arch/arm64/kernel/image-vars.h +++ b/arch/arm64/kernel/image-vars.h @@ -66,8 +66,17 @@ __efistub__ctype = _ctype; /* Symbols defined in debug-sr.c (not yet compiled with nVHE build rules). */ KVM_NVHE_ALIAS(__kvm_get_mdcr_el2); +/* Symbols defined in entry.S (not yet compiled with nVHE build rules). */ +KVM_NVHE_ALIAS(__guest_exit); +KVM_NVHE_ALIAS(abort_guest_exit_end); +KVM_NVHE_ALIAS(abort_guest_exit_start); + +/* Symbols defined in hyp-init.S (not yet compiled with nVHE build rules). */ +KVM_NVHE_ALIAS(__kvm_handle_stub_hvc); + /* Symbols defined in switch.c (not yet compiled with nVHE build rules). */ KVM_NVHE_ALIAS(__kvm_vcpu_run_nvhe); +KVM_NVHE_ALIAS(hyp_panic); /* Symbols defined in sysreg-sr.c (not yet compiled with nVHE build rules). */ KVM_NVHE_ALIAS(__kvm_enable_ssbs); @@ -89,6 +98,21 @@ KVM_NVHE_ALIAS(__vgic_v3_restore_aprs); KVM_NVHE_ALIAS(__vgic_v3_save_aprs); KVM_NVHE_ALIAS(__vgic_v3_write_vmcr); +/* Alternative callbacks for init-time patching of nVHE hyp code. */ +KVM_NVHE_ALIAS(arm64_enable_wa2_handling); +KVM_NVHE_ALIAS(kvm_patch_vector_branch); +KVM_NVHE_ALIAS(kvm_update_va_mask); + +/* Global kernel state accessed by nVHE hyp code. */ +KVM_NVHE_ALIAS(arm64_ssbd_callback_required); +KVM_NVHE_ALIAS(kvm_host_data); + +/* Kernel constant needed to compute idmap addresses. */ +KVM_NVHE_ALIAS(kimage_voffset); + +/* Kernel symbols used to call panic() from nVHE hyp code (via ERET). */ +KVM_NVHE_ALIAS(panic); + #endif /* CONFIG_KVM */ #endif /* __ARM64_KERNEL_IMAGE_VARS_H */ diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 90cb9056144689a2e0471c1220a7b28492e18775..34b5513851536f17067f1b95c53a9672850d0703 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -1285,7 +1285,7 @@ static void cpu_init_hyp_mode(void) * so that we can use adr_l to access per-cpu variables in EL2. */ tpidr_el2 = ((unsigned long)this_cpu_ptr(&kvm_host_data) - - (unsigned long)kvm_ksym_ref(kvm_host_data)); + (unsigned long)kvm_ksym_ref(&kvm_host_data)); pgd_ptr = kvm_mmu_get_httbr(); hyp_stack_ptr = __this_cpu_read(kvm_arm_hyp_stack_page) + PAGE_SIZE; diff --git a/arch/arm64/kvm/hyp/Makefile b/arch/arm64/kvm/hyp/Makefile index 9c5dfe6ff80b7798d8984188df8b4f4dd66109c6..8b0cf85080b566256991533ad38744b651b454a0 100644 --- a/arch/arm64/kvm/hyp/Makefile +++ b/arch/arm64/kvm/hyp/Makefile @@ -10,11 +10,11 @@ subdir-ccflags-y := -I$(incdir) \ -DDISABLE_BRANCH_PROFILING \ $(DISABLE_STACKLEAK_PLUGIN) -obj-$(CONFIG_KVM) += hyp.o nvhe/ +obj-$(CONFIG_KVM) += hyp.o vhe/ nvhe/ obj-$(CONFIG_KVM_INDIRECT_VECTORS) += smccc_wa.o hyp-y := vgic-v3-sr.o timer-sr.o aarch32.o vgic-v2-cpuif-proxy.o sysreg-sr.o \ - debug-sr.o entry.o switch.o fpsimd.o tlb.o hyp-entry.o + debug-sr.o entry.o switch.o fpsimd.o tlb.o # KVM code is run at a different exception code with a different map, so # compiler instrumentation that inserts callbacks or checks into the code may diff --git a/arch/arm64/kvm/hyp/hyp-entry.S b/arch/arm64/kvm/hyp/hyp-entry.S index d362fad97cc83e35299c5601c188075ffb9906fa..7e3c72fa634fb13c2b07daed87f0e7ffe125ebe4 100644 --- a/arch/arm64/kvm/hyp/hyp-entry.S +++ b/arch/arm64/kvm/hyp/hyp-entry.S @@ -40,6 +40,7 @@ el1_sync: // Guest trapped into EL2 ccmp x0, #ESR_ELx_EC_HVC32, #4, ne b.ne el1_trap +#ifdef __KVM_NVHE_HYPERVISOR__ mrs x1, vttbr_el2 // If vttbr is valid, the guest cbnz x1, el1_hvc_guest // called HVC @@ -74,6 +75,7 @@ el1_sync: // Guest trapped into EL2 eret sb +#endif /* __KVM_NVHE_HYPERVISOR__ */ el1_hvc_guest: /* diff --git a/arch/arm64/kvm/hyp/nvhe/Makefile b/arch/arm64/kvm/hyp/nvhe/Makefile index 955f4188e00ffad187e168cf14237ddeb51d9679..79eb8eed96a1c115872d2073e29508cd307585f2 100644 --- a/arch/arm64/kvm/hyp/nvhe/Makefile +++ b/arch/arm64/kvm/hyp/nvhe/Makefile @@ -6,7 +6,7 @@ asflags-y := -D__KVM_NVHE_HYPERVISOR__ ccflags-y := -D__KVM_NVHE_HYPERVISOR__ -obj-y := +obj-y := ../hyp-entry.o obj-y := $(patsubst %.o,%.hyp.o,$(obj-y)) extra-y := $(patsubst %.hyp.o,%.hyp.tmp.o,$(obj-y)) diff --git a/arch/arm64/kvm/hyp/vhe/Makefile b/arch/arm64/kvm/hyp/vhe/Makefile index e0437554608153aaba9616c385bb9e9962190fd4..323029e02b4e5cc30f568a720f6e25310436a1de 100644 --- a/arch/arm64/kvm/hyp/vhe/Makefile +++ b/arch/arm64/kvm/hyp/vhe/Makefile @@ -6,7 +6,7 @@ asflags-y := -D__KVM_VHE_HYPERVISOR__ ccflags-y := -D__KVM_VHE_HYPERVISOR__ -obj-y := +obj-y := ../hyp-entry.o # KVM code is run at a different exception code with a different map, so # compiler instrumentation that inserts callbacks or checks into the code may