Signed-off-by: Liu Yu <yu.liu@xxxxxxxxxxxxx> --- target-ppc/kvm.c | 203 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 203 insertions(+), 0 deletions(-) diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c index b53d6e9..97a0737 100644 --- a/target-ppc/kvm.c +++ b/target-ppc/kvm.c @@ -8,6 +8,9 @@ * Christian Ehrhardt <ehrhardt@xxxxxxxxxxxxxxxxxx> * Hollis Blanchard <hollisb@xxxxxxxxxx> * + * Copyright (C) 2009 Freescale Semiconductor, Inc. All rights reserved. + * Yu Liu <yu.liu@xxxxxxxxxxxxx> + * * This work is licensed under the terms of the GNU GPL, version 2 or later. * See the COPYING file in the top-level directory. * @@ -18,6 +21,7 @@ #include <sys/mman.h> #include <linux/kvm.h> +#include <asm/kvm_asm.h> #include "qemu-common.h" #include "qemu-timer.h" @@ -26,6 +30,7 @@ #include "kvm_ppc.h" #include "cpu.h" #include "device_tree.h" +#include "gdbstub.h" //#define DEBUG_KVM @@ -216,3 +221,201 @@ int kvm_arch_handle_exit(CPUState *env, struct kvm_run *run) return ret; } +#ifdef KVM_CAP_SET_GUEST_DEBUG +int kvm_arch_insert_sw_breakpoint(CPUState *env, struct kvm_sw_breakpoint *bp) +{ + uint32_t sc = tswap32(KVM_INST_GUESTGDB); + uint32_t tmp; + + if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 4, 0) || + cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&sc, 4, 1)) + return -EINVAL; + cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&tmp, 4, 0); + return 0; +} + +int kvm_arch_remove_sw_breakpoint(CPUState *env, struct kvm_sw_breakpoint *bp) +{ + uint32_t sc; + + if (cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&sc, 4, 0) || + sc != tswap32(KVM_INST_GUESTGDB) || + cpu_memory_rw_debug(env, bp->pc, (uint8_t *)&bp->saved_insn, 4, 1)) + return -EINVAL; + return 0; +} + +static struct { + target_ulong addr; + int type; +} hw_breakpoint[6]; + +static int nb_hw_breakpoint; +static int nb_hw_watchpoint; +static int max_hw_breakpoint; +static int max_hw_watchpoint; + +static void kvmppc_debug_init(int max_hw_bp, int max_hw_wp) +{ + max_hw_breakpoint = max_hw_bp > 4? 4 : max_hw_bp; + max_hw_watchpoint = max_hw_wp > 2? 2 : max_hw_wp; +} + +static int find_hw_breakpoint(target_ulong addr, int type) +{ + int n; + + for (n = 0; n < nb_hw_breakpoint + nb_hw_watchpoint; n++) + if (hw_breakpoint[n].addr == addr && hw_breakpoint[n].type == type) + return n; + return -1; +} + +int kvm_arch_insert_hw_breakpoint(target_ulong addr, + target_ulong len, int type) +{ + hw_breakpoint[nb_hw_breakpoint + nb_hw_watchpoint].addr = addr; + hw_breakpoint[nb_hw_breakpoint + nb_hw_watchpoint].type = type; + + switch (type) { + case GDB_BREAKPOINT_HW: + if (nb_hw_breakpoint >= max_hw_breakpoint) + return -ENOBUFS; + + if (find_hw_breakpoint(addr, type) >= 0) + return -EEXIST; + + nb_hw_breakpoint++; + break; + + case GDB_WATCHPOINT_WRITE: + case GDB_WATCHPOINT_READ: + case GDB_WATCHPOINT_ACCESS: + if (nb_hw_watchpoint >= max_hw_watchpoint) + return -ENOBUFS; + + if (find_hw_breakpoint(addr, type) >= 0) + return -EEXIST; + + nb_hw_watchpoint++; + break; + + default: + return -ENOSYS; + } + + return 0; +} + +int kvm_arch_remove_hw_breakpoint(target_ulong addr, + target_ulong len, int type) +{ + int n; + + n = find_hw_breakpoint(addr, type); + if (n < 0) + return -ENOENT; + + switch (type) { + case GDB_BREAKPOINT_HW: + nb_hw_breakpoint--; + break; + + case GDB_WATCHPOINT_WRITE: + case GDB_WATCHPOINT_READ: + case GDB_WATCHPOINT_ACCESS: + nb_hw_watchpoint--; + break; + + default: + return -ENOSYS; + } + hw_breakpoint[n] = hw_breakpoint[nb_hw_breakpoint + nb_hw_watchpoint]; + + return 0; +} + +void kvm_arch_remove_all_hw_breakpoints(void) +{ + nb_hw_breakpoint = nb_hw_watchpoint = 0; +} + +static CPUWatchpoint hw_watchpoint; + +int kvm_arch_debug(struct kvm_debug_exit_arch *arch_info) +{ + int handle = 0; + int n; + + if (cpu_single_env->singlestep_enabled) { + handle = 1; + + } else if (arch_info->status) { + if (arch_info->status & KVMPPC_DEBUG_BREAKPOINT) { + n = find_hw_breakpoint(arch_info->pc, GDB_BREAKPOINT_HW); + if (n >= 0) + handle = 1; + + } else if (arch_info->status & (KVMPPC_DEBUG_WATCH_READ | + KVMPPC_DEBUG_WATCH_WRITE)) { + if ((n = find_hw_breakpoint(arch_info->pc, GDB_WATCHPOINT_ACCESS)) >= 0) { + handle = 1; + cpu_single_env->watchpoint_hit = &hw_watchpoint; + hw_watchpoint.vaddr = hw_breakpoint[n].addr; + hw_watchpoint.flags = BP_MEM_ACCESS; + } else if ((n = find_hw_breakpoint(arch_info->pc, GDB_WATCHPOINT_WRITE) >= 0)) { + handle = 1; + cpu_single_env->watchpoint_hit = &hw_watchpoint; + hw_watchpoint.vaddr = hw_breakpoint[n].addr; + hw_watchpoint.flags = BP_MEM_WRITE; + } else if ((n = find_hw_breakpoint(arch_info->pc, GDB_WATCHPOINT_READ) >= 0)) { + handle = 1; + cpu_single_env->watchpoint_hit = &hw_watchpoint; + hw_watchpoint.vaddr = hw_breakpoint[n].addr; + hw_watchpoint.flags = BP_MEM_READ; + } + } + + } else if (kvm_find_sw_breakpoint(cpu_single_env, arch_info->pc)) + handle = 1; + + /* XXX inject guest debug exception */ + if (!handle) + printf("Unhandled debug exception!\n"); + + return handle; +} + +void kvm_arch_update_guest_debug(CPUState *env, struct kvm_guest_debug *dbg) +{ + if (kvm_sw_breakpoints_active(env)) + dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP; + + if (nb_hw_breakpoint + nb_hw_watchpoint > 0) { + int n; + + dbg->control |= KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP; + memset(dbg->arch.bp, 0, sizeof(dbg->arch.bp)); + for (n = 0; n < nb_hw_breakpoint + nb_hw_watchpoint; n++) { + switch (hw_breakpoint[n].type) { + case GDB_BREAKPOINT_HW: + dbg->arch.bp[n].type = KVMPPC_DEBUG_BREAKPOINT; + break; + case GDB_WATCHPOINT_WRITE: + dbg->arch.bp[n].type = KVMPPC_DEBUG_WATCH_WRITE; + break; + case GDB_WATCHPOINT_READ: + dbg->arch.bp[n].type = KVMPPC_DEBUG_WATCH_READ; + break; + case GDB_WATCHPOINT_ACCESS: + dbg->arch.bp[n].type = KVMPPC_DEBUG_WATCH_WRITE | KVMPPC_DEBUG_WATCH_READ; + break; + default: + printf("Unsupported breakpoint type\n"); + exit(-1); + } + dbg->arch.bp[n].addr = hw_breakpoint[n].addr; + } + } +} +#endif /* KVM_CAP_SET_GUEST_DEBUG */ -- 1.5.4 -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html