diff options
Diffstat (limited to 'arch/arm64/kvm/hyp/debug-sr.c')
| -rw-r--r-- | arch/arm64/kvm/hyp/debug-sr.c | 199 |
1 files changed, 0 insertions, 199 deletions
diff --git a/arch/arm64/kvm/hyp/debug-sr.c b/arch/arm64/kvm/hyp/debug-sr.c deleted file mode 100644 index f5154ed3da6c..000000000000 --- a/arch/arm64/kvm/hyp/debug-sr.c +++ /dev/null @@ -1,199 +0,0 @@ -/* - * Copyright (C) 2015 - ARM Ltd - * Author: Marc Zyngier <marc.zyngier@arm.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - */ - -#include <linux/compiler.h> -#include <linux/kvm_host.h> - -#include <asm/debug-monitors.h> -#include <asm/kvm_asm.h> -#include <asm/kvm_hyp.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); \ - case 14: ptr[14] = read_debug(reg, 14); \ - case 13: ptr[13] = read_debug(reg, 13); \ - case 12: ptr[12] = read_debug(reg, 12); \ - case 11: ptr[11] = read_debug(reg, 11); \ - case 10: ptr[10] = read_debug(reg, 10); \ - case 9: ptr[9] = read_debug(reg, 9); \ - case 8: ptr[8] = read_debug(reg, 8); \ - case 7: ptr[7] = read_debug(reg, 7); \ - case 6: ptr[6] = read_debug(reg, 6); \ - case 5: ptr[5] = read_debug(reg, 5); \ - case 4: ptr[4] = read_debug(reg, 4); \ - case 3: ptr[3] = read_debug(reg, 3); \ - case 2: ptr[2] = read_debug(reg, 2); \ - case 1: ptr[1] = read_debug(reg, 1); \ - default: ptr[0] = read_debug(reg, 0); \ - } - -#define restore_debug(ptr,reg,nr) \ - switch (nr) { \ - case 15: write_debug(ptr[15], reg, 15); \ - case 14: write_debug(ptr[14], reg, 14); \ - case 13: write_debug(ptr[13], reg, 13); \ - case 12: write_debug(ptr[12], reg, 12); \ - case 11: write_debug(ptr[11], reg, 11); \ - case 10: write_debug(ptr[10], reg, 10); \ - case 9: write_debug(ptr[9], reg, 9); \ - case 8: write_debug(ptr[8], reg, 8); \ - case 7: write_debug(ptr[7], reg, 7); \ - case 6: write_debug(ptr[6], reg, 6); \ - case 5: write_debug(ptr[5], reg, 5); \ - case 4: write_debug(ptr[4], reg, 4); \ - case 3: write_debug(ptr[3], reg, 3); \ - case 2: write_debug(ptr[2], reg, 2); \ - case 1: write_debug(ptr[1], reg, 1); \ - default: write_debug(ptr[0], reg, 0); \ - } - -#define PMSCR_EL1 sys_reg(3, 0, 9, 9, 0) - -#define PMBLIMITR_EL1 sys_reg(3, 0, 9, 10, 0) -#define PMBLIMITR_EL1_E BIT(0) - -#define PMBIDR_EL1 sys_reg(3, 0, 9, 10, 7) -#define PMBIDR_EL1_P BIT(4) - -#define psb_csync() asm volatile("hint #17") - -static void __hyp_text __debug_save_spe_vhe(u64 *pmscr_el1) -{ - /* The vcpu can run. but it can't hide. */ -} - -static void __hyp_text __debug_save_spe_nvhe(u64 *pmscr_el1) -{ - u64 reg; - - /* SPE present on this CPU? */ - if (!cpuid_feature_extract_unsigned_field(read_sysreg(id_aa64dfr0_el1), - ID_AA64DFR0_PMSVER_SHIFT)) - return; - - /* Yes; is it owned by EL3? */ - reg = read_sysreg_s(PMBIDR_EL1); - if (reg & PMBIDR_EL1_P) - return; - - /* No; is the host actually using the thing? */ - reg = read_sysreg_s(PMBLIMITR_EL1); - if (!(reg & PMBLIMITR_EL1_E)) - return; - - /* Yes; save the control register and disable data generation */ - *pmscr_el1 = read_sysreg_s(PMSCR_EL1); - write_sysreg_s(0, PMSCR_EL1); - isb(); - - /* Now drain all buffered data to memory */ - psb_csync(); - dsb(nsh); -} - -static hyp_alternate_select(__debug_save_spe, - __debug_save_spe_nvhe, __debug_save_spe_vhe, - ARM64_HAS_VIRT_HOST_EXTN); - -static void __hyp_text __debug_restore_spe(u64 pmscr_el1) -{ - if (!pmscr_el1) - return; - - /* The host page table is installed, but not yet synchronised */ - isb(); - - /* Re-enable data generation */ - write_sysreg_s(pmscr_el1, PMSCR_EL1); -} - -void __hyp_text __debug_save_state(struct kvm_vcpu *vcpu, - struct kvm_guest_debug_arch *dbg, - struct kvm_cpu_context *ctxt) -{ - u64 aa64dfr0; - int brps, wrps; - - if (!(vcpu->arch.debug_flags & KVM_ARM64_DEBUG_DIRTY)) - return; - - 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_regs[MDCCINT_EL1] = read_sysreg(mdccint_el1); -} - -void __hyp_text __debug_restore_state(struct kvm_vcpu *vcpu, - struct kvm_guest_debug_arch *dbg, - struct kvm_cpu_context *ctxt) -{ - u64 aa64dfr0; - int brps, wrps; - - if (!(vcpu->arch.debug_flags & KVM_ARM64_DEBUG_DIRTY)) - return; - - 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_regs[MDCCINT_EL1], mdccint_el1); -} - -void __hyp_text __debug_cond_save_host_state(struct kvm_vcpu *vcpu) -{ - /* If any of KDE, MDE or KVM_ARM64_DEBUG_DIRTY is set, perform - * a full save/restore cycle. */ - if ((vcpu->arch.ctxt.sys_regs[MDSCR_EL1] & DBG_MDSCR_KDE) || - (vcpu->arch.ctxt.sys_regs[MDSCR_EL1] & DBG_MDSCR_MDE)) - vcpu->arch.debug_flags |= KVM_ARM64_DEBUG_DIRTY; - - __debug_save_state(vcpu, &vcpu->arch.host_debug_state.regs, - kern_hyp_va(vcpu->arch.host_cpu_context)); - __debug_save_spe()(&vcpu->arch.host_debug_state.pmscr_el1); -} - -void __hyp_text __debug_cond_restore_host_state(struct kvm_vcpu *vcpu) -{ - __debug_restore_spe(vcpu->arch.host_debug_state.pmscr_el1); - __debug_restore_state(vcpu, &vcpu->arch.host_debug_state.regs, - kern_hyp_va(vcpu->arch.host_cpu_context)); - - if (vcpu->arch.debug_flags & KVM_ARM64_DEBUG_DIRTY) - vcpu->arch.debug_flags &= ~KVM_ARM64_DEBUG_DIRTY; -} - -u32 __hyp_text __kvm_get_mdcr_el2(void) -{ - return read_sysreg(mdcr_el2); -} |