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/
usr
/
src
/
linux-headers-6.8.0-83
/
arch
/
arm64
/
kvm
/
hyp
/
include
/
hyp
/ [
drwxr-xr-x
]
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debug-sr.h
// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2015 - ARM Ltd * Author: Marc Zyngier <marc.zyngier@arm.com> */ #ifndef __ARM64_KVM_HYP_DEBUG_SR_H__ #define __ARM64_KVM_HYP_DEBUG_SR_H__ #include <linux/compiler.h> #include <linux/kvm_host.h> #include <asm/debug-monitors.h> #include <asm/kvm_asm.h> #include <asm/kvm_hyp.h> #include <asm/kvm_mmu.h> #define read_debug(r,n) read_sysreg(r##n##_el1) #define write_debug(v,r,n) write_sysreg(v, r##n##_el1) #define save_debug(ptr,reg,nr) \ switch (nr) { \ case 15: ptr[15] = read_debug(reg, 15); \ fallthrough; \ case 14: ptr[14] = read_debug(reg, 14); \ fallthrough; \ case 13: ptr[13] = read_debug(reg, 13); \ fallthrough; \ case 12: ptr[12] = read_debug(reg, 12); \ fallthrough; \ case 11: ptr[11] = read_debug(reg, 11); \ fallthrough; \ case 10: ptr[10] = read_debug(reg, 10); \ fallthrough; \ case 9: ptr[9] = read_debug(reg, 9); \ fallthrough; \ case 8: ptr[8] = read_debug(reg, 8); \ fallthrough; \ case 7: ptr[7] = read_debug(reg, 7); \ fallthrough; \ case 6: ptr[6] = read_debug(reg, 6); \ fallthrough; \ case 5: ptr[5] = read_debug(reg, 5); \ fallthrough; \ case 4: ptr[4] = read_debug(reg, 4); \ fallthrough; \ case 3: ptr[3] = read_debug(reg, 3); \ fallthrough; \ case 2: ptr[2] = read_debug(reg, 2); \ fallthrough; \ case 1: ptr[1] = read_debug(reg, 1); \ fallthrough; \ default: ptr[0] = read_debug(reg, 0); \ } #define restore_debug(ptr,reg,nr) \ switch (nr) { \ case 15: write_debug(ptr[15], reg, 15); \ fallthrough; \ case 14: write_debug(ptr[14], reg, 14); \ fallthrough; \ case 13: write_debug(ptr[13], reg, 13); \ fallthrough; \ case 12: write_debug(ptr[12], reg, 12); \ fallthrough; \ case 11: write_debug(ptr[11], reg, 11); \ fallthrough; \ case 10: write_debug(ptr[10], reg, 10); \ fallthrough; \ case 9: write_debug(ptr[9], reg, 9); \ fallthrough; \ case 8: write_debug(ptr[8], reg, 8); \ fallthrough; \ case 7: write_debug(ptr[7], reg, 7); \ fallthrough; \ case 6: write_debug(ptr[6], reg, 6); \ fallthrough; \ case 5: write_debug(ptr[5], reg, 5); \ fallthrough; \ case 4: write_debug(ptr[4], reg, 4); \ fallthrough; \ case 3: write_debug(ptr[3], reg, 3); \ fallthrough; \ case 2: write_debug(ptr[2], reg, 2); \ fallthrough; \ case 1: write_debug(ptr[1], reg, 1); \ fallthrough; \ default: write_debug(ptr[0], reg, 0); \ } static void __debug_save_state(struct kvm_guest_debug_arch *dbg, struct kvm_cpu_context *ctxt) { u64 aa64dfr0; int brps, wrps; aa64dfr0 = read_sysreg(id_aa64dfr0_el1); brps = (aa64dfr0 >> 12) & 0xf; wrps = (aa64dfr0 >> 20) & 0xf; save_debug(dbg->dbg_bcr, dbgbcr, brps); save_debug(dbg->dbg_bvr, dbgbvr, brps); save_debug(dbg->dbg_wcr, dbgwcr, wrps); save_debug(dbg->dbg_wvr, dbgwvr, wrps); ctxt_sys_reg(ctxt, MDCCINT_EL1) = read_sysreg(mdccint_el1); } static void __debug_restore_state(struct kvm_guest_debug_arch *dbg, struct kvm_cpu_context *ctxt) { u64 aa64dfr0; int brps, wrps; aa64dfr0 = read_sysreg(id_aa64dfr0_el1); brps = (aa64dfr0 >> 12) & 0xf; wrps = (aa64dfr0 >> 20) & 0xf; restore_debug(dbg->dbg_bcr, dbgbcr, brps); restore_debug(dbg->dbg_bvr, dbgbvr, brps); restore_debug(dbg->dbg_wcr, dbgwcr, wrps); restore_debug(dbg->dbg_wvr, dbgwvr, wrps); write_sysreg(ctxt_sys_reg(ctxt, MDCCINT_EL1), mdccint_el1); } static inline void __debug_switch_to_guest_common(struct kvm_vcpu *vcpu) { struct kvm_cpu_context *host_ctxt; struct kvm_cpu_context *guest_ctxt; struct kvm_guest_debug_arch *host_dbg; struct kvm_guest_debug_arch *guest_dbg; if (!vcpu_get_flag(vcpu, DEBUG_DIRTY)) return; host_ctxt = &this_cpu_ptr(&kvm_host_data)->host_ctxt; guest_ctxt = &vcpu->arch.ctxt; host_dbg = &vcpu->arch.host_debug_state.regs; guest_dbg = kern_hyp_va(vcpu->arch.debug_ptr); __debug_save_state(host_dbg, host_ctxt); __debug_restore_state(guest_dbg, guest_ctxt); } static inline void __debug_switch_to_host_common(struct kvm_vcpu *vcpu) { struct kvm_cpu_context *host_ctxt; struct kvm_cpu_context *guest_ctxt; struct kvm_guest_debug_arch *host_dbg; struct kvm_guest_debug_arch *guest_dbg; if (!vcpu_get_flag(vcpu, DEBUG_DIRTY)) return; host_ctxt = &this_cpu_ptr(&kvm_host_data)->host_ctxt; guest_ctxt = &vcpu->arch.ctxt; host_dbg = &vcpu->arch.host_debug_state.regs; guest_dbg = kern_hyp_va(vcpu->arch.debug_ptr); __debug_save_state(guest_dbg, guest_ctxt); __debug_restore_state(host_dbg, host_ctxt); vcpu_clear_flag(vcpu, DEBUG_DIRTY); } #endif /* __ARM64_KVM_HYP_DEBUG_SR_H__ */
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