| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Andrew Scull | 333 | 26.37% | 6 | 8.11% |
| Marc Zyngier | 254 | 20.11% | 26 | 35.14% |
| Christoffer Dall | 185 | 14.65% | 6 | 8.11% |
| David Brazdil | 179 | 14.17% | 9 | 12.16% |
| Arnd Bergmann | 137 | 10.85% | 2 | 2.70% |
| James Morse | 63 | 4.99% | 5 | 6.76% |
| Kalesh Singh | 26 | 2.06% | 2 | 2.70% |
| Quentin Perret | 22 | 1.74% | 5 | 6.76% |
| Mario Smarduch | 19 | 1.50% | 1 | 1.35% |
| Raghavendra Rao Ananta | 13 | 1.03% | 1 | 1.35% |
| Fuad Tabba | 7 | 0.55% | 2 | 2.70% |
| Mark Rutland | 7 | 0.55% | 3 | 4.05% |
| Will Deacon | 6 | 0.48% | 2 | 2.70% |
| Ard Biesheuvel | 5 | 0.40% | 1 | 1.35% |
| Andrew Murray | 3 | 0.24% | 1 | 1.35% |
| Alex Bennée | 2 | 0.16% | 1 | 1.35% |
| Thomas Gleixner | 2 | 0.16% | 1 | 1.35% |
| Total | 1263 | 74 |
/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2012,2013 - ARM Ltd * Author: Marc Zyngier <marc.zyngier@arm.com> */ #ifndef __ARM_KVM_ASM_H__ #define __ARM_KVM_ASM_H__ #include <asm/hyp_image.h> #include <asm/insn.h> #include <asm/virt.h> #define ARM_EXIT_WITH_SERROR_BIT 31 #define ARM_EXCEPTION_CODE(x) ((x) & ~(1U << ARM_EXIT_WITH_SERROR_BIT)) #define ARM_EXCEPTION_IS_TRAP(x) (ARM_EXCEPTION_CODE((x)) == ARM_EXCEPTION_TRAP) #define ARM_SERROR_PENDING(x) !!((x) & (1U << ARM_EXIT_WITH_SERROR_BIT)) #define ARM_EXCEPTION_IRQ 0 #define ARM_EXCEPTION_EL1_SERROR 1 #define ARM_EXCEPTION_TRAP 2 #define ARM_EXCEPTION_IL 3 /* The hyp-stub will return this for any kvm_call_hyp() call */ #define ARM_EXCEPTION_HYP_GONE HVC_STUB_ERR #define kvm_arm_exception_type \ {ARM_EXCEPTION_IRQ, "IRQ" }, \ {ARM_EXCEPTION_EL1_SERROR, "SERROR" }, \ {ARM_EXCEPTION_TRAP, "TRAP" }, \ {ARM_EXCEPTION_HYP_GONE, "HYP_GONE" } /* * Size of the HYP vectors preamble. kvm_patch_vector_branch() generates code * that jumps over this. */ #define KVM_VECTOR_PREAMBLE (2 * AARCH64_INSN_SIZE) #define KVM_HOST_SMCCC_ID(id) \ ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ ARM_SMCCC_SMC_64, \ ARM_SMCCC_OWNER_VENDOR_HYP, \ (id)) #define KVM_HOST_SMCCC_FUNC(name) KVM_HOST_SMCCC_ID(__KVM_HOST_SMCCC_FUNC_##name) #define __KVM_HOST_SMCCC_FUNC___kvm_hyp_init 0 #ifndef __ASSEMBLY__ #include <linux/mm.h> enum __kvm_host_smccc_func { /* Hypercalls available only prior to pKVM finalisation */ /* __KVM_HOST_SMCCC_FUNC___kvm_hyp_init */ __KVM_HOST_SMCCC_FUNC___kvm_get_mdcr_el2 = __KVM_HOST_SMCCC_FUNC___kvm_hyp_init + 1, __KVM_HOST_SMCCC_FUNC___pkvm_init, __KVM_HOST_SMCCC_FUNC___pkvm_create_private_mapping, __KVM_HOST_SMCCC_FUNC___pkvm_cpu_set_vector, __KVM_HOST_SMCCC_FUNC___kvm_enable_ssbs, __KVM_HOST_SMCCC_FUNC___vgic_v3_init_lrs, __KVM_HOST_SMCCC_FUNC___vgic_v3_get_gic_config, __KVM_HOST_SMCCC_FUNC___pkvm_prot_finalize, /* Hypercalls available after pKVM finalisation */ __KVM_HOST_SMCCC_FUNC___pkvm_host_share_hyp, __KVM_HOST_SMCCC_FUNC___pkvm_host_unshare_hyp, __KVM_HOST_SMCCC_FUNC___kvm_adjust_pc, __KVM_HOST_SMCCC_FUNC___kvm_vcpu_run, __KVM_HOST_SMCCC_FUNC___kvm_flush_vm_context, __KVM_HOST_SMCCC_FUNC___kvm_tlb_flush_vmid_ipa, __KVM_HOST_SMCCC_FUNC___kvm_tlb_flush_vmid_ipa_nsh, __KVM_HOST_SMCCC_FUNC___kvm_tlb_flush_vmid, __KVM_HOST_SMCCC_FUNC___kvm_tlb_flush_vmid_range, __KVM_HOST_SMCCC_FUNC___kvm_flush_cpu_context, __KVM_HOST_SMCCC_FUNC___kvm_timer_set_cntvoff, __KVM_HOST_SMCCC_FUNC___vgic_v3_save_vmcr_aprs, __KVM_HOST_SMCCC_FUNC___vgic_v3_restore_vmcr_aprs, __KVM_HOST_SMCCC_FUNC___pkvm_vcpu_init_traps, __KVM_HOST_SMCCC_FUNC___pkvm_init_vm, __KVM_HOST_SMCCC_FUNC___pkvm_init_vcpu, __KVM_HOST_SMCCC_FUNC___pkvm_teardown_vm, }; #define DECLARE_KVM_VHE_SYM(sym) extern char sym[] #define DECLARE_KVM_NVHE_SYM(sym) extern char kvm_nvhe_sym(sym)[] /* * Define a pair of symbols sharing the same name but one defined in * VHE and the other in nVHE hyp implementations. */ #define DECLARE_KVM_HYP_SYM(sym) \ DECLARE_KVM_VHE_SYM(sym); \ DECLARE_KVM_NVHE_SYM(sym) #define DECLARE_KVM_VHE_PER_CPU(type, sym) \ DECLARE_PER_CPU(type, sym) #define DECLARE_KVM_NVHE_PER_CPU(type, sym) \ DECLARE_PER_CPU(type, kvm_nvhe_sym(sym)) #define DECLARE_KVM_HYP_PER_CPU(type, sym) \ DECLARE_KVM_VHE_PER_CPU(type, sym); \ DECLARE_KVM_NVHE_PER_CPU(type, sym) /* * 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_nvhe_sym(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; \ }) #if defined(__KVM_NVHE_HYPERVISOR__) #define CHOOSE_NVHE_SYM(sym) sym #define CHOOSE_HYP_SYM(sym) CHOOSE_NVHE_SYM(sym) /* The nVHE hypervisor shouldn't even try to access VHE symbols */ extern void *__nvhe_undefined_symbol; #define CHOOSE_VHE_SYM(sym) __nvhe_undefined_symbol #define this_cpu_ptr_hyp_sym(sym) (&__nvhe_undefined_symbol) #define per_cpu_ptr_hyp_sym(sym, cpu) (&__nvhe_undefined_symbol) #elif defined(__KVM_VHE_HYPERVISOR__) #define CHOOSE_VHE_SYM(sym) sym #define CHOOSE_HYP_SYM(sym) CHOOSE_VHE_SYM(sym) /* The VHE hypervisor shouldn't even try to access nVHE symbols */ extern void *__vhe_undefined_symbol; #define CHOOSE_NVHE_SYM(sym) __vhe_undefined_symbol #define this_cpu_ptr_hyp_sym(sym) (&__vhe_undefined_symbol) #define per_cpu_ptr_hyp_sym(sym, cpu) (&__vhe_undefined_symbol) #else /* * BIG FAT WARNINGS: * * - Don't be tempted to change the following is_kernel_in_hyp_mode() * to has_vhe(). has_vhe() is implemented as a *final* capability, * while this is used early at boot time, when the capabilities are * not final yet.... * * - Don't let the nVHE hypervisor have access to this, as it will * pick the *wrong* symbol (yes, it runs at EL2...). */ #define CHOOSE_HYP_SYM(sym) (is_kernel_in_hyp_mode() \ ? CHOOSE_VHE_SYM(sym) \ : CHOOSE_NVHE_SYM(sym)) #define this_cpu_ptr_hyp_sym(sym) (is_kernel_in_hyp_mode() \ ? this_cpu_ptr(&sym) \ : this_cpu_ptr_nvhe_sym(sym)) #define per_cpu_ptr_hyp_sym(sym, cpu) (is_kernel_in_hyp_mode() \ ? per_cpu_ptr(&sym, cpu) \ : per_cpu_ptr_nvhe_sym(sym, cpu)) #define CHOOSE_VHE_SYM(sym) sym #define CHOOSE_NVHE_SYM(sym) kvm_nvhe_sym(sym) #endif struct kvm_nvhe_init_params { unsigned long mair_el2; unsigned long tcr_el2; unsigned long tpidr_el2; unsigned long stack_hyp_va; unsigned long stack_pa; phys_addr_t pgd_pa; unsigned long hcr_el2; unsigned long vttbr; unsigned long vtcr; }; /* * Used by the host in EL1 to dump the nVHE hypervisor backtrace on * hyp_panic() in non-protected mode. * * @stack_base: hyp VA of the hyp_stack base. * @overflow_stack_base: hyp VA of the hyp_overflow_stack base. * @fp: hyp FP where the backtrace begins. * @pc: hyp PC where the backtrace begins. */ struct kvm_nvhe_stacktrace_info { unsigned long stack_base; unsigned long overflow_stack_base; unsigned long fp; unsigned long pc; }; /* Translate a kernel address @ptr into its equivalent linear mapping */ #define kvm_ksym_ref(ptr) \ ({ \ void *val = (ptr); \ if (!is_kernel_in_hyp_mode()) \ val = lm_alias((ptr)); \ val; \ }) #define kvm_ksym_ref_nvhe(sym) kvm_ksym_ref(kvm_nvhe_sym(sym)) struct kvm; struct kvm_vcpu; struct kvm_s2_mmu; DECLARE_KVM_NVHE_SYM(__kvm_hyp_init); 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_nvhe_sym(kvm_arm_hyp_percpu_base)[]; DECLARE_KVM_NVHE_SYM(__per_cpu_start); DECLARE_KVM_NVHE_SYM(__per_cpu_end); DECLARE_KVM_HYP_SYM(__bp_harden_hyp_vecs); #define __bp_harden_hyp_vecs CHOOSE_HYP_SYM(__bp_harden_hyp_vecs) extern void __kvm_flush_vm_context(void); extern void __kvm_flush_cpu_context(struct kvm_s2_mmu *mmu); extern void __kvm_tlb_flush_vmid_ipa(struct kvm_s2_mmu *mmu, phys_addr_t ipa, int level); extern void __kvm_tlb_flush_vmid_ipa_nsh(struct kvm_s2_mmu *mmu, phys_addr_t ipa, int level); extern void __kvm_tlb_flush_vmid_range(struct kvm_s2_mmu *mmu, phys_addr_t start, unsigned long pages); extern void __kvm_tlb_flush_vmid(struct kvm_s2_mmu *mmu); extern int __kvm_tlbi_s1e2(struct kvm_s2_mmu *mmu, u64 va, u64 sys_encoding); extern void __kvm_timer_set_cntvoff(u64 cntvoff); extern int __kvm_vcpu_run(struct kvm_vcpu *vcpu); extern void __kvm_adjust_pc(struct kvm_vcpu *vcpu); extern u64 __vgic_v3_get_gic_config(void); extern void __vgic_v3_init_lrs(void); extern u64 __kvm_get_mdcr_el2(void); #define __KVM_EXTABLE(from, to) \ " .pushsection __kvm_ex_table, \"a\"\n" \ " .align 3\n" \ " .long (" #from " - .), (" #to " - .)\n" \ " .popsection\n" #define __kvm_at(at_op, addr) \ ( { \ int __kvm_at_err = 0; \ u64 spsr, elr; \ asm volatile( \ " mrs %1, spsr_el2\n" \ " mrs %2, elr_el2\n" \ "1: at "at_op", %3\n" \ " isb\n" \ " b 9f\n" \ "2: msr spsr_el2, %1\n" \ " msr elr_el2, %2\n" \ " mov %w0, %4\n" \ "9:\n" \ __KVM_EXTABLE(1b, 2b) \ : "+r" (__kvm_at_err), "=&r" (spsr), "=&r" (elr) \ : "r" (addr), "i" (-EFAULT)); \ __kvm_at_err; \ } ) void __noreturn hyp_panic(void); asmlinkage void kvm_unexpected_el2_exception(void); asmlinkage void __noreturn hyp_panic(void); asmlinkage void __noreturn hyp_panic_bad_stack(void); asmlinkage void kvm_unexpected_el2_exception(void); struct kvm_cpu_context; void handle_trap(struct kvm_cpu_context *host_ctxt); asmlinkage void __noreturn __kvm_host_psci_cpu_entry(bool is_cpu_on); void __noreturn __pkvm_init_finalise(void); void kvm_nvhe_prepare_backtrace(unsigned long fp, unsigned long pc); void kvm_patch_vector_branch(struct alt_instr *alt, __le32 *origptr, __le32 *updptr, int nr_inst); void kvm_get_kimage_voffset(struct alt_instr *alt, __le32 *origptr, __le32 *updptr, int nr_inst); void kvm_compute_final_ctr_el0(struct alt_instr *alt, __le32 *origptr, __le32 *updptr, int nr_inst); void __noreturn __cold nvhe_hyp_panic_handler(u64 esr, u64 spsr, u64 elr_virt, u64 elr_phys, u64 par, uintptr_t vcpu, u64 far, u64 hpfar); #else /* __ASSEMBLY__ */ .macro get_host_ctxt reg, tmp adr_this_cpu \reg, kvm_host_data, \tmp add \reg, \reg, #HOST_DATA_CONTEXT .endm .macro get_vcpu_ptr vcpu, ctxt get_host_ctxt \ctxt, \vcpu ldr \vcpu, [\ctxt, #HOST_CONTEXT_VCPU] .endm .macro get_loaded_vcpu vcpu, ctxt adr_this_cpu \ctxt, kvm_hyp_ctxt, \vcpu ldr \vcpu, [\ctxt, #HOST_CONTEXT_VCPU] .endm .macro set_loaded_vcpu vcpu, ctxt, tmp adr_this_cpu \ctxt, kvm_hyp_ctxt, \tmp str \vcpu, [\ctxt, #HOST_CONTEXT_VCPU] .endm /* * KVM extable for unexpected exceptions. * Create a struct kvm_exception_table_entry output to a section that can be * mapped by EL2. The table is not sorted. * * The caller must ensure: * x18 has the hypervisor value to allow any Shadow-Call-Stack instrumented * code to write to it, and that SPSR_EL2 and ELR_EL2 are restored by the fixup. */ .macro _kvm_extable, from, to .pushsection __kvm_ex_table, "a" .align 3 .long (\from - .), (\to - .) .popsection .endm #define CPU_XREG_OFFSET(x) (CPU_USER_PT_REGS + 8*x) #define CPU_LR_OFFSET CPU_XREG_OFFSET(30) #define CPU_SP_EL0_OFFSET (CPU_LR_OFFSET + 8) /* * We treat x18 as callee-saved as the host may use it as a platform * register (e.g. for shadow call stack). */ .macro save_callee_saved_regs ctxt str x18, [\ctxt, #CPU_XREG_OFFSET(18)] stp x19, x20, [\ctxt, #CPU_XREG_OFFSET(19)] stp x21, x22, [\ctxt, #CPU_XREG_OFFSET(21)] stp x23, x24, [\ctxt, #CPU_XREG_OFFSET(23)] stp x25, x26, [\ctxt, #CPU_XREG_OFFSET(25)] stp x27, x28, [\ctxt, #CPU_XREG_OFFSET(27)] stp x29, lr, [\ctxt, #CPU_XREG_OFFSET(29)] .endm .macro restore_callee_saved_regs ctxt // We require \ctxt is not x18-x28 ldr x18, [\ctxt, #CPU_XREG_OFFSET(18)] ldp x19, x20, [\ctxt, #CPU_XREG_OFFSET(19)] ldp x21, x22, [\ctxt, #CPU_XREG_OFFSET(21)] ldp x23, x24, [\ctxt, #CPU_XREG_OFFSET(23)] ldp x25, x26, [\ctxt, #CPU_XREG_OFFSET(25)] ldp x27, x28, [\ctxt, #CPU_XREG_OFFSET(27)] ldp x29, lr, [\ctxt, #CPU_XREG_OFFSET(29)] .endm .macro save_sp_el0 ctxt, tmp mrs \tmp, sp_el0 str \tmp, [\ctxt, #CPU_SP_EL0_OFFSET] .endm .macro restore_sp_el0 ctxt, tmp ldr \tmp, [\ctxt, #CPU_SP_EL0_OFFSET] msr sp_el0, \tmp .endm #endif #endif /* __ARM_KVM_ASM_H__ */
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