| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Marc Zyngier | 874 | 27.50% | 25 | 32.89% |
| Quentin Perret | 692 | 21.77% | 10 | 13.16% |
| Fuad Tabba | 475 | 14.95% | 7 | 9.21% |
| Will Deacon | 455 | 14.32% | 5 | 6.58% |
| Andrew Scull | 373 | 11.74% | 4 | 5.26% |
| David Brazdil | 98 | 3.08% | 6 | 7.89% |
| Oliver Upton | 74 | 2.33% | 1 | 1.32% |
| Vincent Donnefort | 30 | 0.94% | 4 | 5.26% |
| Mark Rutland | 24 | 0.76% | 3 | 3.95% |
| Kalesh Singh | 20 | 0.63% | 1 | 1.32% |
| Raghavendra Rao Ananta | 18 | 0.57% | 1 | 1.32% |
| Jean-Philippe Brucker | 18 | 0.57% | 1 | 1.32% |
| Mark Brown | 17 | 0.53% | 3 | 3.95% |
| Arnd Bergmann | 6 | 0.19% | 1 | 1.32% |
| Christoffer Dall | 3 | 0.09% | 3 | 3.95% |
| Thomas Gleixner | 1 | 0.03% | 1 | 1.32% |
| Total | 3178 | 76 |
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2020 - Google Inc * Author: Andrew Scull <ascull@google.com> */ #include <hyp/adjust_pc.h> #include <hyp/switch.h> #include <asm/pgtable-types.h> #include <asm/kvm_asm.h> #include <asm/kvm_emulate.h> #include <asm/kvm_host.h> #include <asm/kvm_hyp.h> #include <asm/kvm_mmu.h> #include <nvhe/ffa.h> #include <nvhe/mem_protect.h> #include <nvhe/mm.h> #include <nvhe/pkvm.h> #include <nvhe/trap_handler.h> DEFINE_PER_CPU(struct kvm_nvhe_init_params, kvm_init_params); void __kvm_hyp_host_forward_smc(struct kvm_cpu_context *host_ctxt); static void __hyp_sve_save_guest(struct kvm_vcpu *vcpu) { __vcpu_assign_sys_reg(vcpu, ZCR_EL1, read_sysreg_el1(SYS_ZCR)); /* * On saving/restoring guest sve state, always use the maximum VL for * the guest. The layout of the data when saving the sve state depends * on the VL, so use a consistent (i.e., the maximum) guest VL. */ sve_cond_update_zcr_vq(vcpu_sve_max_vq(vcpu) - 1, SYS_ZCR_EL2); __sve_save_state(vcpu_sve_pffr(vcpu), &vcpu->arch.ctxt.fp_regs.fpsr, true); write_sysreg_s(sve_vq_from_vl(kvm_host_sve_max_vl) - 1, SYS_ZCR_EL2); } static void __hyp_sve_restore_host(void) { struct cpu_sve_state *sve_state = *host_data_ptr(sve_state); /* * On saving/restoring host sve state, always use the maximum VL for * the host. The layout of the data when saving the sve state depends * on the VL, so use a consistent (i.e., the maximum) host VL. * * Note that this constrains the PE to the maximum shared VL * that was discovered, if we wish to use larger VLs this will * need to be revisited. */ write_sysreg_s(sve_vq_from_vl(kvm_host_sve_max_vl) - 1, SYS_ZCR_EL2); __sve_restore_state(sve_state->sve_regs + sve_ffr_offset(kvm_host_sve_max_vl), &sve_state->fpsr, true); write_sysreg_el1(sve_state->zcr_el1, SYS_ZCR); } static void fpsimd_sve_flush(void) { *host_data_ptr(fp_owner) = FP_STATE_HOST_OWNED; } static void fpsimd_sve_sync(struct kvm_vcpu *vcpu) { bool has_fpmr; if (!guest_owns_fp_regs()) return; /* * Traps have been disabled by __deactivate_cptr_traps(), but there * hasn't necessarily been a context synchronization event yet. */ isb(); if (vcpu_has_sve(vcpu)) __hyp_sve_save_guest(vcpu); else __fpsimd_save_state(&vcpu->arch.ctxt.fp_regs); has_fpmr = kvm_has_fpmr(kern_hyp_va(vcpu->kvm)); if (has_fpmr) __vcpu_assign_sys_reg(vcpu, FPMR, read_sysreg_s(SYS_FPMR)); if (system_supports_sve()) __hyp_sve_restore_host(); else __fpsimd_restore_state(host_data_ptr(host_ctxt.fp_regs)); if (has_fpmr) write_sysreg_s(*host_data_ptr(fpmr), SYS_FPMR); *host_data_ptr(fp_owner) = FP_STATE_HOST_OWNED; } static void flush_debug_state(struct pkvm_hyp_vcpu *hyp_vcpu) { struct kvm_vcpu *host_vcpu = hyp_vcpu->host_vcpu; hyp_vcpu->vcpu.arch.debug_owner = host_vcpu->arch.debug_owner; if (kvm_guest_owns_debug_regs(&hyp_vcpu->vcpu)) hyp_vcpu->vcpu.arch.vcpu_debug_state = host_vcpu->arch.vcpu_debug_state; else if (kvm_host_owns_debug_regs(&hyp_vcpu->vcpu)) hyp_vcpu->vcpu.arch.external_debug_state = host_vcpu->arch.external_debug_state; } static void sync_debug_state(struct pkvm_hyp_vcpu *hyp_vcpu) { struct kvm_vcpu *host_vcpu = hyp_vcpu->host_vcpu; if (kvm_guest_owns_debug_regs(&hyp_vcpu->vcpu)) host_vcpu->arch.vcpu_debug_state = hyp_vcpu->vcpu.arch.vcpu_debug_state; else if (kvm_host_owns_debug_regs(&hyp_vcpu->vcpu)) host_vcpu->arch.external_debug_state = hyp_vcpu->vcpu.arch.external_debug_state; } static void flush_hyp_vcpu(struct pkvm_hyp_vcpu *hyp_vcpu) { struct kvm_vcpu *host_vcpu = hyp_vcpu->host_vcpu; fpsimd_sve_flush(); flush_debug_state(hyp_vcpu); hyp_vcpu->vcpu.arch.ctxt = host_vcpu->arch.ctxt; hyp_vcpu->vcpu.arch.mdcr_el2 = host_vcpu->arch.mdcr_el2; hyp_vcpu->vcpu.arch.hcr_el2 &= ~(HCR_TWI | HCR_TWE); hyp_vcpu->vcpu.arch.hcr_el2 |= READ_ONCE(host_vcpu->arch.hcr_el2) & (HCR_TWI | HCR_TWE); hyp_vcpu->vcpu.arch.iflags = host_vcpu->arch.iflags; hyp_vcpu->vcpu.arch.vsesr_el2 = host_vcpu->arch.vsesr_el2; hyp_vcpu->vcpu.arch.vgic_cpu.vgic_v3 = host_vcpu->arch.vgic_cpu.vgic_v3; } static void sync_hyp_vcpu(struct pkvm_hyp_vcpu *hyp_vcpu) { struct kvm_vcpu *host_vcpu = hyp_vcpu->host_vcpu; struct vgic_v3_cpu_if *hyp_cpu_if = &hyp_vcpu->vcpu.arch.vgic_cpu.vgic_v3; struct vgic_v3_cpu_if *host_cpu_if = &host_vcpu->arch.vgic_cpu.vgic_v3; unsigned int i; fpsimd_sve_sync(&hyp_vcpu->vcpu); sync_debug_state(hyp_vcpu); host_vcpu->arch.ctxt = hyp_vcpu->vcpu.arch.ctxt; host_vcpu->arch.hcr_el2 = hyp_vcpu->vcpu.arch.hcr_el2; host_vcpu->arch.fault = hyp_vcpu->vcpu.arch.fault; host_vcpu->arch.iflags = hyp_vcpu->vcpu.arch.iflags; host_cpu_if->vgic_hcr = hyp_cpu_if->vgic_hcr; for (i = 0; i < hyp_cpu_if->used_lrs; ++i) host_cpu_if->vgic_lr[i] = hyp_cpu_if->vgic_lr[i]; } static void handle___pkvm_vcpu_load(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(pkvm_handle_t, handle, host_ctxt, 1); DECLARE_REG(unsigned int, vcpu_idx, host_ctxt, 2); DECLARE_REG(u64, hcr_el2, host_ctxt, 3); struct pkvm_hyp_vcpu *hyp_vcpu; if (!is_protected_kvm_enabled()) return; hyp_vcpu = pkvm_load_hyp_vcpu(handle, vcpu_idx); if (!hyp_vcpu) return; if (pkvm_hyp_vcpu_is_protected(hyp_vcpu)) { /* Propagate WFx trapping flags */ hyp_vcpu->vcpu.arch.hcr_el2 &= ~(HCR_TWE | HCR_TWI); hyp_vcpu->vcpu.arch.hcr_el2 |= hcr_el2 & (HCR_TWE | HCR_TWI); } } static void handle___pkvm_vcpu_put(struct kvm_cpu_context *host_ctxt) { struct pkvm_hyp_vcpu *hyp_vcpu; if (!is_protected_kvm_enabled()) return; hyp_vcpu = pkvm_get_loaded_hyp_vcpu(); if (hyp_vcpu) pkvm_put_hyp_vcpu(hyp_vcpu); } static void handle___kvm_vcpu_run(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(struct kvm_vcpu *, host_vcpu, host_ctxt, 1); int ret; if (unlikely(is_protected_kvm_enabled())) { struct pkvm_hyp_vcpu *hyp_vcpu = pkvm_get_loaded_hyp_vcpu(); /* * KVM (and pKVM) doesn't support SME guests for now, and * ensures that SME features aren't enabled in pstate when * loading a vcpu. Therefore, if SME features enabled the host * is misbehaving. */ if (unlikely(system_supports_sme() && read_sysreg_s(SYS_SVCR))) { ret = -EINVAL; goto out; } if (!hyp_vcpu) { ret = -EINVAL; goto out; } flush_hyp_vcpu(hyp_vcpu); ret = __kvm_vcpu_run(&hyp_vcpu->vcpu); sync_hyp_vcpu(hyp_vcpu); } else { struct kvm_vcpu *vcpu = kern_hyp_va(host_vcpu); /* The host is fully trusted, run its vCPU directly. */ fpsimd_lazy_switch_to_guest(vcpu); ret = __kvm_vcpu_run(vcpu); fpsimd_lazy_switch_to_host(vcpu); } out: cpu_reg(host_ctxt, 1) = ret; } static int pkvm_refill_memcache(struct pkvm_hyp_vcpu *hyp_vcpu) { struct kvm_vcpu *host_vcpu = hyp_vcpu->host_vcpu; return refill_memcache(&hyp_vcpu->vcpu.arch.pkvm_memcache, host_vcpu->arch.pkvm_memcache.nr_pages, &host_vcpu->arch.pkvm_memcache); } static void handle___pkvm_host_share_guest(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(u64, pfn, host_ctxt, 1); DECLARE_REG(u64, gfn, host_ctxt, 2); DECLARE_REG(u64, nr_pages, host_ctxt, 3); DECLARE_REG(enum kvm_pgtable_prot, prot, host_ctxt, 4); struct pkvm_hyp_vcpu *hyp_vcpu; int ret = -EINVAL; if (!is_protected_kvm_enabled()) goto out; hyp_vcpu = pkvm_get_loaded_hyp_vcpu(); if (!hyp_vcpu || pkvm_hyp_vcpu_is_protected(hyp_vcpu)) goto out; ret = pkvm_refill_memcache(hyp_vcpu); if (ret) goto out; ret = __pkvm_host_share_guest(pfn, gfn, nr_pages, hyp_vcpu, prot); out: cpu_reg(host_ctxt, 1) = ret; } static void handle___pkvm_host_unshare_guest(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(pkvm_handle_t, handle, host_ctxt, 1); DECLARE_REG(u64, gfn, host_ctxt, 2); DECLARE_REG(u64, nr_pages, host_ctxt, 3); struct pkvm_hyp_vm *hyp_vm; int ret = -EINVAL; if (!is_protected_kvm_enabled()) goto out; hyp_vm = get_np_pkvm_hyp_vm(handle); if (!hyp_vm) goto out; ret = __pkvm_host_unshare_guest(gfn, nr_pages, hyp_vm); put_pkvm_hyp_vm(hyp_vm); out: cpu_reg(host_ctxt, 1) = ret; } static void handle___pkvm_host_relax_perms_guest(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(u64, gfn, host_ctxt, 1); DECLARE_REG(enum kvm_pgtable_prot, prot, host_ctxt, 2); struct pkvm_hyp_vcpu *hyp_vcpu; int ret = -EINVAL; if (!is_protected_kvm_enabled()) goto out; hyp_vcpu = pkvm_get_loaded_hyp_vcpu(); if (!hyp_vcpu || pkvm_hyp_vcpu_is_protected(hyp_vcpu)) goto out; ret = __pkvm_host_relax_perms_guest(gfn, hyp_vcpu, prot); out: cpu_reg(host_ctxt, 1) = ret; } static void handle___pkvm_host_wrprotect_guest(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(pkvm_handle_t, handle, host_ctxt, 1); DECLARE_REG(u64, gfn, host_ctxt, 2); DECLARE_REG(u64, nr_pages, host_ctxt, 3); struct pkvm_hyp_vm *hyp_vm; int ret = -EINVAL; if (!is_protected_kvm_enabled()) goto out; hyp_vm = get_np_pkvm_hyp_vm(handle); if (!hyp_vm) goto out; ret = __pkvm_host_wrprotect_guest(gfn, nr_pages, hyp_vm); put_pkvm_hyp_vm(hyp_vm); out: cpu_reg(host_ctxt, 1) = ret; } static void handle___pkvm_host_test_clear_young_guest(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(pkvm_handle_t, handle, host_ctxt, 1); DECLARE_REG(u64, gfn, host_ctxt, 2); DECLARE_REG(u64, nr_pages, host_ctxt, 3); DECLARE_REG(bool, mkold, host_ctxt, 4); struct pkvm_hyp_vm *hyp_vm; int ret = -EINVAL; if (!is_protected_kvm_enabled()) goto out; hyp_vm = get_np_pkvm_hyp_vm(handle); if (!hyp_vm) goto out; ret = __pkvm_host_test_clear_young_guest(gfn, nr_pages, mkold, hyp_vm); put_pkvm_hyp_vm(hyp_vm); out: cpu_reg(host_ctxt, 1) = ret; } static void handle___pkvm_host_mkyoung_guest(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(u64, gfn, host_ctxt, 1); struct pkvm_hyp_vcpu *hyp_vcpu; int ret = -EINVAL; if (!is_protected_kvm_enabled()) goto out; hyp_vcpu = pkvm_get_loaded_hyp_vcpu(); if (!hyp_vcpu || pkvm_hyp_vcpu_is_protected(hyp_vcpu)) goto out; ret = __pkvm_host_mkyoung_guest(gfn, hyp_vcpu); out: cpu_reg(host_ctxt, 1) = ret; } static void handle___kvm_adjust_pc(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(struct kvm_vcpu *, vcpu, host_ctxt, 1); __kvm_adjust_pc(kern_hyp_va(vcpu)); } static void handle___kvm_flush_vm_context(struct kvm_cpu_context *host_ctxt) { __kvm_flush_vm_context(); } static void handle___kvm_tlb_flush_vmid_ipa(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(struct kvm_s2_mmu *, mmu, host_ctxt, 1); DECLARE_REG(phys_addr_t, ipa, host_ctxt, 2); DECLARE_REG(int, level, host_ctxt, 3); __kvm_tlb_flush_vmid_ipa(kern_hyp_va(mmu), ipa, level); } static void handle___kvm_tlb_flush_vmid_ipa_nsh(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(struct kvm_s2_mmu *, mmu, host_ctxt, 1); DECLARE_REG(phys_addr_t, ipa, host_ctxt, 2); DECLARE_REG(int, level, host_ctxt, 3); __kvm_tlb_flush_vmid_ipa_nsh(kern_hyp_va(mmu), ipa, level); } static void handle___kvm_tlb_flush_vmid_range(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(struct kvm_s2_mmu *, mmu, host_ctxt, 1); DECLARE_REG(phys_addr_t, start, host_ctxt, 2); DECLARE_REG(unsigned long, pages, host_ctxt, 3); __kvm_tlb_flush_vmid_range(kern_hyp_va(mmu), start, pages); } static void handle___kvm_tlb_flush_vmid(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(struct kvm_s2_mmu *, mmu, host_ctxt, 1); __kvm_tlb_flush_vmid(kern_hyp_va(mmu)); } static void handle___pkvm_tlb_flush_vmid(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(pkvm_handle_t, handle, host_ctxt, 1); struct pkvm_hyp_vm *hyp_vm; if (!is_protected_kvm_enabled()) return; hyp_vm = get_np_pkvm_hyp_vm(handle); if (!hyp_vm) return; __kvm_tlb_flush_vmid(&hyp_vm->kvm.arch.mmu); put_pkvm_hyp_vm(hyp_vm); } static void handle___kvm_flush_cpu_context(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(struct kvm_s2_mmu *, mmu, host_ctxt, 1); __kvm_flush_cpu_context(kern_hyp_va(mmu)); } static void handle___kvm_timer_set_cntvoff(struct kvm_cpu_context *host_ctxt) { __kvm_timer_set_cntvoff(cpu_reg(host_ctxt, 1)); } static void handle___kvm_enable_ssbs(struct kvm_cpu_context *host_ctxt) { u64 tmp; tmp = read_sysreg_el2(SYS_SCTLR); tmp |= SCTLR_ELx_DSSBS; write_sysreg_el2(tmp, SYS_SCTLR); } static void handle___vgic_v3_get_gic_config(struct kvm_cpu_context *host_ctxt) { cpu_reg(host_ctxt, 1) = __vgic_v3_get_gic_config(); } static void handle___vgic_v3_init_lrs(struct kvm_cpu_context *host_ctxt) { __vgic_v3_init_lrs(); } static void handle___vgic_v3_save_vmcr_aprs(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(struct vgic_v3_cpu_if *, cpu_if, host_ctxt, 1); __vgic_v3_save_vmcr_aprs(kern_hyp_va(cpu_if)); } static void handle___vgic_v3_restore_vmcr_aprs(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(struct vgic_v3_cpu_if *, cpu_if, host_ctxt, 1); __vgic_v3_restore_vmcr_aprs(kern_hyp_va(cpu_if)); } static void handle___pkvm_init(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(phys_addr_t, phys, host_ctxt, 1); DECLARE_REG(unsigned long, size, host_ctxt, 2); DECLARE_REG(unsigned long, nr_cpus, host_ctxt, 3); DECLARE_REG(unsigned long *, per_cpu_base, host_ctxt, 4); DECLARE_REG(u32, hyp_va_bits, host_ctxt, 5); /* * __pkvm_init() will return only if an error occurred, otherwise it * will tail-call in __pkvm_init_finalise() which will have to deal * with the host context directly. */ cpu_reg(host_ctxt, 1) = __pkvm_init(phys, size, nr_cpus, per_cpu_base, hyp_va_bits); } static void handle___pkvm_cpu_set_vector(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(enum arm64_hyp_spectre_vector, slot, host_ctxt, 1); cpu_reg(host_ctxt, 1) = pkvm_cpu_set_vector(slot); } static void handle___pkvm_host_share_hyp(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(u64, pfn, host_ctxt, 1); cpu_reg(host_ctxt, 1) = __pkvm_host_share_hyp(pfn); } static void handle___pkvm_host_unshare_hyp(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(u64, pfn, host_ctxt, 1); cpu_reg(host_ctxt, 1) = __pkvm_host_unshare_hyp(pfn); } static void handle___pkvm_create_private_mapping(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(phys_addr_t, phys, host_ctxt, 1); DECLARE_REG(size_t, size, host_ctxt, 2); DECLARE_REG(enum kvm_pgtable_prot, prot, host_ctxt, 3); /* * __pkvm_create_private_mapping() populates a pointer with the * hypervisor start address of the allocation. * * However, handle___pkvm_create_private_mapping() hypercall crosses the * EL1/EL2 boundary so the pointer would not be valid in this context. * * Instead pass the allocation address as the return value (or return * ERR_PTR() on failure). */ unsigned long haddr; int err = __pkvm_create_private_mapping(phys, size, prot, &haddr); if (err) haddr = (unsigned long)ERR_PTR(err); cpu_reg(host_ctxt, 1) = haddr; } static void handle___pkvm_prot_finalize(struct kvm_cpu_context *host_ctxt) { cpu_reg(host_ctxt, 1) = __pkvm_prot_finalize(); } static void handle___pkvm_init_vm(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(struct kvm *, host_kvm, host_ctxt, 1); DECLARE_REG(unsigned long, vm_hva, host_ctxt, 2); DECLARE_REG(unsigned long, pgd_hva, host_ctxt, 3); host_kvm = kern_hyp_va(host_kvm); cpu_reg(host_ctxt, 1) = __pkvm_init_vm(host_kvm, vm_hva, pgd_hva); } static void handle___pkvm_init_vcpu(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(pkvm_handle_t, handle, host_ctxt, 1); DECLARE_REG(struct kvm_vcpu *, host_vcpu, host_ctxt, 2); DECLARE_REG(unsigned long, vcpu_hva, host_ctxt, 3); host_vcpu = kern_hyp_va(host_vcpu); cpu_reg(host_ctxt, 1) = __pkvm_init_vcpu(handle, host_vcpu, vcpu_hva); } static void handle___pkvm_teardown_vm(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(pkvm_handle_t, handle, host_ctxt, 1); cpu_reg(host_ctxt, 1) = __pkvm_teardown_vm(handle); } typedef void (*hcall_t)(struct kvm_cpu_context *); #define HANDLE_FUNC(x) [__KVM_HOST_SMCCC_FUNC_##x] = (hcall_t)handle_##x static const hcall_t host_hcall[] = { /* ___kvm_hyp_init */ HANDLE_FUNC(__pkvm_init), HANDLE_FUNC(__pkvm_create_private_mapping), HANDLE_FUNC(__pkvm_cpu_set_vector), HANDLE_FUNC(__kvm_enable_ssbs), HANDLE_FUNC(__vgic_v3_init_lrs), HANDLE_FUNC(__vgic_v3_get_gic_config), HANDLE_FUNC(__pkvm_prot_finalize), HANDLE_FUNC(__pkvm_host_share_hyp), HANDLE_FUNC(__pkvm_host_unshare_hyp), HANDLE_FUNC(__pkvm_host_share_guest), HANDLE_FUNC(__pkvm_host_unshare_guest), HANDLE_FUNC(__pkvm_host_relax_perms_guest), HANDLE_FUNC(__pkvm_host_wrprotect_guest), HANDLE_FUNC(__pkvm_host_test_clear_young_guest), HANDLE_FUNC(__pkvm_host_mkyoung_guest), HANDLE_FUNC(__kvm_adjust_pc), HANDLE_FUNC(__kvm_vcpu_run), HANDLE_FUNC(__kvm_flush_vm_context), HANDLE_FUNC(__kvm_tlb_flush_vmid_ipa), HANDLE_FUNC(__kvm_tlb_flush_vmid_ipa_nsh), HANDLE_FUNC(__kvm_tlb_flush_vmid), HANDLE_FUNC(__kvm_tlb_flush_vmid_range), HANDLE_FUNC(__kvm_flush_cpu_context), HANDLE_FUNC(__kvm_timer_set_cntvoff), HANDLE_FUNC(__vgic_v3_save_vmcr_aprs), HANDLE_FUNC(__vgic_v3_restore_vmcr_aprs), HANDLE_FUNC(__pkvm_init_vm), HANDLE_FUNC(__pkvm_init_vcpu), HANDLE_FUNC(__pkvm_teardown_vm), HANDLE_FUNC(__pkvm_vcpu_load), HANDLE_FUNC(__pkvm_vcpu_put), HANDLE_FUNC(__pkvm_tlb_flush_vmid), }; static void handle_host_hcall(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(unsigned long, id, host_ctxt, 0); unsigned long hcall_min = 0; hcall_t hfn; /* * If pKVM has been initialised then reject any calls to the * early "privileged" hypercalls. Note that we cannot reject * calls to __pkvm_prot_finalize for two reasons: (1) The static * key used to determine initialisation must be toggled prior to * finalisation and (2) finalisation is performed on a per-CPU * basis. This is all fine, however, since __pkvm_prot_finalize * returns -EPERM after the first call for a given CPU. */ if (static_branch_unlikely(&kvm_protected_mode_initialized)) hcall_min = __KVM_HOST_SMCCC_FUNC___pkvm_prot_finalize; id &= ~ARM_SMCCC_CALL_HINTS; id -= KVM_HOST_SMCCC_ID(0); if (unlikely(id < hcall_min || id >= ARRAY_SIZE(host_hcall))) goto inval; hfn = host_hcall[id]; if (unlikely(!hfn)) goto inval; cpu_reg(host_ctxt, 0) = SMCCC_RET_SUCCESS; hfn(host_ctxt); return; inval: cpu_reg(host_ctxt, 0) = SMCCC_RET_NOT_SUPPORTED; } static void default_host_smc_handler(struct kvm_cpu_context *host_ctxt) { __kvm_hyp_host_forward_smc(host_ctxt); } static void handle_host_smc(struct kvm_cpu_context *host_ctxt) { DECLARE_REG(u64, func_id, host_ctxt, 0); bool handled; func_id &= ~ARM_SMCCC_CALL_HINTS; handled = kvm_host_psci_handler(host_ctxt, func_id); if (!handled) handled = kvm_host_ffa_handler(host_ctxt, func_id); if (!handled) default_host_smc_handler(host_ctxt); /* SMC was trapped, move ELR past the current PC. */ kvm_skip_host_instr(); } void handle_trap(struct kvm_cpu_context *host_ctxt) { u64 esr = read_sysreg_el2(SYS_ESR); switch (ESR_ELx_EC(esr)) { case ESR_ELx_EC_HVC64: handle_host_hcall(host_ctxt); break; case ESR_ELx_EC_SMC64: handle_host_smc(host_ctxt); break; case ESR_ELx_EC_IABT_LOW: case ESR_ELx_EC_DABT_LOW: handle_host_mem_abort(host_ctxt); break; default: BUG(); } }
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