From: "Mian M. Hamayun" <m.hama...@virtualopensystems.com> This commit separates the 32-bit (ARMv7) specific KVM hooks from the common code. It also adds the stub functions for 64-bit (ARMv8).
The makefile objects are also tweaked accordingly to compile code either of ARMv7 or ARMv8 depending on the AARCH64 variable. Signed-off-by: Mian M. Hamayun <m.hama...@virtualopensystems.com> --- target-arm/Makefile.objs | 5 + target-arm/kvm.c | 363 -------------------------------------------- target-arm/kvm_32.c | 382 +++++++++++++++++++++++++++++++++++++++++++++++ target-arm/kvm_64.c | 39 +++++ 4 files changed, 426 insertions(+), 363 deletions(-) create mode 100644 target-arm/kvm_32.c create mode 100644 target-arm/kvm_64.c diff --git a/target-arm/Makefile.objs b/target-arm/Makefile.objs index 6453f5c..4b37d29 100644 --- a/target-arm/Makefile.objs +++ b/target-arm/Makefile.objs @@ -1,6 +1,11 @@ obj-y += arm-semi.o obj-$(CONFIG_SOFTMMU) += machine.o obj-$(CONFIG_KVM) += kvm.o +ifeq ($(TARGET_AARCH64),y) +obj-$(CONFIG_KVM) += kvm_64.o +else +obj-$(CONFIG_KVM) += kvm_32.o +endif obj-$(CONFIG_NO_KVM) += kvm-stub.o obj-y += translate.o op_helper.o helper.o cpu.o obj-y += neon_helper.o iwmmxt_helper.o diff --git a/target-arm/kvm.c b/target-arm/kvm.c index b92e00d..8e608c9 100644 --- a/target-arm/kvm.c +++ b/target-arm/kvm.c @@ -50,130 +50,6 @@ unsigned long kvm_arch_vcpu_id(CPUState *cpu) return cpu->cpu_index; } -static bool reg_syncs_via_tuple_list(uint64_t regidx) -{ - /* Return true if the regidx is a register we should synchronize - * via the cpreg_tuples array (ie is not a core reg we sync by - * hand in kvm_arch_get/put_registers()) - */ - switch (regidx & KVM_REG_ARM_COPROC_MASK) { - case KVM_REG_ARM_CORE: - case KVM_REG_ARM_VFP: - return false; - default: - return true; - } -} - -static int compare_u64(const void *a, const void *b) -{ - return *(uint64_t *)a - *(uint64_t *)b; -} - -int kvm_arch_init_vcpu(CPUState *cs) -{ - struct kvm_vcpu_init init; - int i, ret, arraylen; - uint64_t v; - struct kvm_one_reg r; - struct kvm_reg_list rl; - struct kvm_reg_list *rlp; - ARMCPU *cpu = ARM_CPU(cs); - - init.target = KVM_ARM_TARGET_CORTEX_A15; - memset(init.features, 0, sizeof(init.features)); - ret = kvm_vcpu_ioctl(cs, KVM_ARM_VCPU_INIT, &init); - if (ret) { - return ret; - } - /* Query the kernel to make sure it supports 32 VFP - * registers: QEMU's "cortex-a15" CPU is always a - * VFP-D32 core. The simplest way to do this is just - * to attempt to read register d31. - */ - r.id = KVM_REG_ARM | KVM_REG_SIZE_U64 | KVM_REG_ARM_VFP | 31; - r.addr = (uintptr_t)(&v); - ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &r); - if (ret == -ENOENT) { - return -EINVAL; - } - - /* Populate the cpreg list based on the kernel's idea - * of what registers exist (and throw away the TCG-created list). - */ - rl.n = 0; - ret = kvm_vcpu_ioctl(cs, KVM_GET_REG_LIST, &rl); - if (ret != -E2BIG) { - return ret; - } - rlp = g_malloc(sizeof(struct kvm_reg_list) + rl.n * sizeof(uint64_t)); - rlp->n = rl.n; - ret = kvm_vcpu_ioctl(cs, KVM_GET_REG_LIST, rlp); - if (ret) { - goto out; - } - /* Sort the list we get back from the kernel, since cpreg_tuples - * must be in strictly ascending order. - */ - qsort(&rlp->reg, rlp->n, sizeof(rlp->reg[0]), compare_u64); - - for (i = 0, arraylen = 0; i < rlp->n; i++) { - if (!reg_syncs_via_tuple_list(rlp->reg[i])) { - continue; - } - switch (rlp->reg[i] & KVM_REG_SIZE_MASK) { - case KVM_REG_SIZE_U32: - case KVM_REG_SIZE_U64: - break; - default: - fprintf(stderr, "Can't handle size of register in kernel list\n"); - ret = -EINVAL; - goto out; - } - - arraylen++; - } - - cpu->cpreg_indexes = g_renew(uint64_t, cpu->cpreg_indexes, arraylen); - cpu->cpreg_values = g_renew(uint64_t, cpu->cpreg_values, arraylen); - cpu->cpreg_vmstate_indexes = g_renew(uint64_t, cpu->cpreg_vmstate_indexes, - arraylen); - cpu->cpreg_vmstate_values = g_renew(uint64_t, cpu->cpreg_vmstate_values, - arraylen); - cpu->cpreg_array_len = arraylen; - cpu->cpreg_vmstate_array_len = arraylen; - - for (i = 0, arraylen = 0; i < rlp->n; i++) { - uint64_t regidx = rlp->reg[i]; - if (!reg_syncs_via_tuple_list(regidx)) { - continue; - } - cpu->cpreg_indexes[arraylen] = regidx; - arraylen++; - } - assert(cpu->cpreg_array_len == arraylen); - - if (!write_kvmstate_to_list(cpu)) { - /* Shouldn't happen unless kernel is inconsistent about - * what registers exist. - */ - fprintf(stderr, "Initial read of kernel register state failed\n"); - ret = -EINVAL; - goto out; - } - - /* Save a copy of the initial register values so that we can - * feed it back to the kernel on VCPU reset. - */ - cpu->cpreg_reset_values = g_memdup(cpu->cpreg_values, - cpu->cpreg_array_len * - sizeof(cpu->cpreg_values[0])); - -out: - g_free(rlp); - return ret; -} - /* We track all the KVM devices which need their memory addresses * passing to the kernel in a list of these structures. * When board init is complete we run through the list and @@ -334,232 +210,6 @@ bool write_list_to_kvmstate(ARMCPU *cpu) return ok; } -typedef struct Reg { - uint64_t id; - int offset; -} Reg; - -#define COREREG(KERNELNAME, QEMUFIELD) \ - { \ - KVM_REG_ARM | KVM_REG_SIZE_U32 | \ - KVM_REG_ARM_CORE | KVM_REG_ARM_CORE_REG(KERNELNAME), \ - offsetof(CPUARMState, QEMUFIELD) \ - } - -#define VFPSYSREG(R) \ - { \ - KVM_REG_ARM | KVM_REG_SIZE_U32 | KVM_REG_ARM_VFP | \ - KVM_REG_ARM_VFP_##R, \ - offsetof(CPUARMState, vfp.xregs[ARM_VFP_##R]) \ - } - -static const Reg regs[] = { - /* R0_usr .. R14_usr */ - COREREG(usr_regs.uregs[0], regs[0]), - COREREG(usr_regs.uregs[1], regs[1]), - COREREG(usr_regs.uregs[2], regs[2]), - COREREG(usr_regs.uregs[3], regs[3]), - COREREG(usr_regs.uregs[4], regs[4]), - COREREG(usr_regs.uregs[5], regs[5]), - COREREG(usr_regs.uregs[6], regs[6]), - COREREG(usr_regs.uregs[7], regs[7]), - COREREG(usr_regs.uregs[8], usr_regs[0]), - COREREG(usr_regs.uregs[9], usr_regs[1]), - COREREG(usr_regs.uregs[10], usr_regs[2]), - COREREG(usr_regs.uregs[11], usr_regs[3]), - COREREG(usr_regs.uregs[12], usr_regs[4]), - COREREG(usr_regs.uregs[13], banked_r13[0]), - COREREG(usr_regs.uregs[14], banked_r14[0]), - /* R13, R14, SPSR for SVC, ABT, UND, IRQ banks */ - COREREG(svc_regs[0], banked_r13[1]), - COREREG(svc_regs[1], banked_r14[1]), - COREREG(svc_regs[2], banked_spsr[1]), - COREREG(abt_regs[0], banked_r13[2]), - COREREG(abt_regs[1], banked_r14[2]), - COREREG(abt_regs[2], banked_spsr[2]), - COREREG(und_regs[0], banked_r13[3]), - COREREG(und_regs[1], banked_r14[3]), - COREREG(und_regs[2], banked_spsr[3]), - COREREG(irq_regs[0], banked_r13[4]), - COREREG(irq_regs[1], banked_r14[4]), - COREREG(irq_regs[2], banked_spsr[4]), - /* R8_fiq .. R14_fiq and SPSR_fiq */ - COREREG(fiq_regs[0], fiq_regs[0]), - COREREG(fiq_regs[1], fiq_regs[1]), - COREREG(fiq_regs[2], fiq_regs[2]), - COREREG(fiq_regs[3], fiq_regs[3]), - COREREG(fiq_regs[4], fiq_regs[4]), - COREREG(fiq_regs[5], banked_r13[5]), - COREREG(fiq_regs[6], banked_r14[5]), - COREREG(fiq_regs[7], banked_spsr[5]), - /* R15 */ - COREREG(usr_regs.uregs[15], regs[15]), - /* VFP system registers */ - VFPSYSREG(FPSID), - VFPSYSREG(MVFR1), - VFPSYSREG(MVFR0), - VFPSYSREG(FPEXC), - VFPSYSREG(FPINST), - VFPSYSREG(FPINST2), -}; - -int kvm_arch_put_registers(CPUState *cs, int level) -{ - ARMCPU *cpu = ARM_CPU(cs); - CPUARMState *env = &cpu->env; - struct kvm_one_reg r; - int mode, bn; - int ret, i; - uint32_t cpsr, fpscr; - - /* Make sure the banked regs are properly set */ - mode = env->uncached_cpsr & CPSR_M; - bn = bank_number(mode); - if (mode == ARM_CPU_MODE_FIQ) { - memcpy(env->fiq_regs, env->regs + 8, 5 * sizeof(uint32_t)); - } else { - memcpy(env->usr_regs, env->regs + 8, 5 * sizeof(uint32_t)); - } - env->banked_r13[bn] = env->regs[13]; - env->banked_r14[bn] = env->regs[14]; - env->banked_spsr[bn] = env->spsr; - - /* Now we can safely copy stuff down to the kernel */ - for (i = 0; i < ARRAY_SIZE(regs); i++) { - r.id = regs[i].id; - r.addr = (uintptr_t)(env) + regs[i].offset; - ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &r); - if (ret) { - return ret; - } - } - - /* Special cases which aren't a single CPUARMState field */ - cpsr = cpsr_read(env); - r.id = KVM_REG_ARM | KVM_REG_SIZE_U32 | - KVM_REG_ARM_CORE | KVM_REG_ARM_CORE_REG(usr_regs.ARM_cpsr); - r.addr = (uintptr_t)(&cpsr); - ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &r); - if (ret) { - return ret; - } - - /* VFP registers */ - r.id = KVM_REG_ARM | KVM_REG_SIZE_U64 | KVM_REG_ARM_VFP; - for (i = 0; i < 32; i++) { - r.addr = (uintptr_t)(&env->vfp.regs[i]); - ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &r); - if (ret) { - return ret; - } - r.id++; - } - - r.id = KVM_REG_ARM | KVM_REG_SIZE_U32 | KVM_REG_ARM_VFP | - KVM_REG_ARM_VFP_FPSCR; - fpscr = vfp_get_fpscr(env); - r.addr = (uintptr_t)&fpscr; - ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &r); - if (ret) { - return ret; - } - - /* Note that we do not call write_cpustate_to_list() - * here, so we are only writing the tuple list back to - * KVM. This is safe because nothing can change the - * CPUARMState cp15 fields (in particular gdb accesses cannot) - * and so there are no changes to sync. In fact syncing would - * be wrong at this point: for a constant register where TCG and - * KVM disagree about its value, the preceding write_list_to_cpustate() - * would not have had any effect on the CPUARMState value (since the - * register is read-only), and a write_cpustate_to_list() here would - * then try to write the TCG value back into KVM -- this would either - * fail or incorrectly change the value the guest sees. - * - * If we ever want to allow the user to modify cp15 registers via - * the gdb stub, we would need to be more clever here (for instance - * tracking the set of registers kvm_arch_get_registers() successfully - * managed to update the CPUARMState with, and only allowing those - * to be written back up into the kernel). - */ - if (!write_list_to_kvmstate(cpu)) { - return EINVAL; - } - - return ret; -} - -int kvm_arch_get_registers(CPUState *cs) -{ - ARMCPU *cpu = ARM_CPU(cs); - CPUARMState *env = &cpu->env; - struct kvm_one_reg r; - int mode, bn; - int ret, i; - uint32_t cpsr, fpscr; - - for (i = 0; i < ARRAY_SIZE(regs); i++) { - r.id = regs[i].id; - r.addr = (uintptr_t)(env) + regs[i].offset; - ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &r); - if (ret) { - return ret; - } - } - - /* Special cases which aren't a single CPUARMState field */ - r.id = KVM_REG_ARM | KVM_REG_SIZE_U32 | - KVM_REG_ARM_CORE | KVM_REG_ARM_CORE_REG(usr_regs.ARM_cpsr); - r.addr = (uintptr_t)(&cpsr); - ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &r); - if (ret) { - return ret; - } - cpsr_write(env, cpsr, 0xffffffff); - - /* Make sure the current mode regs are properly set */ - mode = env->uncached_cpsr & CPSR_M; - bn = bank_number(mode); - if (mode == ARM_CPU_MODE_FIQ) { - memcpy(env->regs + 8, env->fiq_regs, 5 * sizeof(uint32_t)); - } else { - memcpy(env->regs + 8, env->usr_regs, 5 * sizeof(uint32_t)); - } - env->regs[13] = env->banked_r13[bn]; - env->regs[14] = env->banked_r14[bn]; - env->spsr = env->banked_spsr[bn]; - - /* VFP registers */ - r.id = KVM_REG_ARM | KVM_REG_SIZE_U64 | KVM_REG_ARM_VFP; - for (i = 0; i < 32; i++) { - r.addr = (uintptr_t)(&env->vfp.regs[i]); - ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &r); - if (ret) { - return ret; - } - r.id++; - } - - r.id = KVM_REG_ARM | KVM_REG_SIZE_U32 | KVM_REG_ARM_VFP | - KVM_REG_ARM_VFP_FPSCR; - r.addr = (uintptr_t)&fpscr; - ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &r); - if (ret) { - return ret; - } - vfp_set_fpscr(env, fpscr); - - if (!write_kvmstate_to_list(cpu)) { - return EINVAL; - } - /* Note that it's OK to have registers which aren't in CPUState, - * so we can ignore a failure return here. - */ - write_list_to_cpustate(cpu); - - return 0; -} - void kvm_arch_pre_run(CPUState *cs, struct kvm_run *run) { } @@ -573,19 +223,6 @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) return 0; } -void kvm_arch_reset_vcpu(CPUState *cs) -{ - /* Feed the kernel back its initial register state */ - ARMCPU *cpu = ARM_CPU(cs); - - memmove(cpu->cpreg_values, cpu->cpreg_reset_values, - cpu->cpreg_array_len * sizeof(cpu->cpreg_values[0])); - - if (!write_list_to_kvmstate(cpu)) { - abort(); - } -} - bool kvm_arch_stop_on_emulation_error(CPUState *cs) { return true; diff --git a/target-arm/kvm_32.c b/target-arm/kvm_32.c new file mode 100644 index 0000000..b67ea94 --- /dev/null +++ b/target-arm/kvm_32.c @@ -0,0 +1,382 @@ +/* + * ARM implementation of KVM hooks + * + * Copyright Christoffer Dall 2009-2010 + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#include <stdio.h> +#include <sys/types.h> + +#include <linux/kvm.h> + +#include "qemu-common.h" +#include "sysemu/kvm.h" +#include "kvm_arm.h" + +static bool reg_syncs_via_tuple_list(uint64_t regidx) +{ + /* Return true if the regidx is a register we should synchronize + * via the cpreg_tuples array (ie is not a core reg we sync by + * hand in kvm_arch_get/put_registers()) + */ + switch (regidx & KVM_REG_ARM_COPROC_MASK) { + case KVM_REG_ARM_CORE: + case KVM_REG_ARM_VFP: + return false; + default: + return true; + } +} + +static int compare_u64(const void *a, const void *b) +{ + return *(uint64_t *)a - *(uint64_t *)b; +} + +int kvm_arch_init_vcpu(CPUState *cs) +{ + struct kvm_vcpu_init init; + int i, ret, arraylen; + uint64_t v; + struct kvm_one_reg r; + struct kvm_reg_list rl; + struct kvm_reg_list *rlp; + ARMCPU *cpu = ARM_CPU(cs); + + init.target = KVM_ARM_TARGET_CORTEX_A15; + memset(init.features, 0, sizeof(init.features)); + ret = kvm_vcpu_ioctl(cs, KVM_ARM_VCPU_INIT, &init); + if (ret) { + return ret; + } + /* Query the kernel to make sure it supports 32 VFP + * registers: QEMU's "cortex-a15" CPU is always a + * VFP-D32 core. The simplest way to do this is just + * to attempt to read register d31. + */ + r.id = KVM_REG_ARM | KVM_REG_SIZE_U64 | KVM_REG_ARM_VFP | 31; + r.addr = (uintptr_t)(&v); + ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &r); + if (ret == -ENOENT) { + return -EINVAL; + } + + /* Populate the cpreg list based on the kernel's idea + * of what registers exist (and throw away the TCG-created list). + */ + rl.n = 0; + ret = kvm_vcpu_ioctl(cs, KVM_GET_REG_LIST, &rl); + if (ret != -E2BIG) { + return ret; + } + rlp = g_malloc(sizeof(struct kvm_reg_list) + rl.n * sizeof(uint64_t)); + rlp->n = rl.n; + ret = kvm_vcpu_ioctl(cs, KVM_GET_REG_LIST, rlp); + if (ret) { + goto out; + } + /* Sort the list we get back from the kernel, since cpreg_tuples + * must be in strictly ascending order. + */ + qsort(&rlp->reg, rlp->n, sizeof(rlp->reg[0]), compare_u64); + + for (i = 0, arraylen = 0; i < rlp->n; i++) { + if (!reg_syncs_via_tuple_list(rlp->reg[i])) { + continue; + } + switch (rlp->reg[i] & KVM_REG_SIZE_MASK) { + case KVM_REG_SIZE_U32: + case KVM_REG_SIZE_U64: + break; + default: + fprintf(stderr, "Can't handle size of register in kernel list\n"); + ret = -EINVAL; + goto out; + } + + arraylen++; + } + + cpu->cpreg_indexes = g_renew(uint64_t, cpu->cpreg_indexes, arraylen); + cpu->cpreg_values = g_renew(uint64_t, cpu->cpreg_values, arraylen); + cpu->cpreg_vmstate_indexes = g_renew(uint64_t, cpu->cpreg_vmstate_indexes, + arraylen); + cpu->cpreg_vmstate_values = g_renew(uint64_t, cpu->cpreg_vmstate_values, + arraylen); + cpu->cpreg_array_len = arraylen; + cpu->cpreg_vmstate_array_len = arraylen; + + for (i = 0, arraylen = 0; i < rlp->n; i++) { + uint64_t regidx = rlp->reg[i]; + if (!reg_syncs_via_tuple_list(regidx)) { + continue; + } + cpu->cpreg_indexes[arraylen] = regidx; + arraylen++; + } + assert(cpu->cpreg_array_len == arraylen); + + if (!write_kvmstate_to_list(cpu)) { + /* Shouldn't happen unless kernel is inconsistent about + * what registers exist. + */ + fprintf(stderr, "Initial read of kernel register state failed\n"); + ret = -EINVAL; + goto out; + } + + /* Save a copy of the initial register values so that we can + * feed it back to the kernel on VCPU reset. + */ + cpu->cpreg_reset_values = g_memdup(cpu->cpreg_values, + cpu->cpreg_array_len * + sizeof(cpu->cpreg_values[0])); + +out: + g_free(rlp); + return ret; +} + +typedef struct Reg { + uint64_t id; + int offset; +} Reg; + +#define COREREG(KERNELNAME, QEMUFIELD) \ + { \ + KVM_REG_ARM | KVM_REG_SIZE_U32 | \ + KVM_REG_ARM_CORE | KVM_REG_ARM_CORE_REG(KERNELNAME), \ + offsetof(CPUARMState, QEMUFIELD) \ + } + +#define VFPSYSREG(R) \ + { \ + KVM_REG_ARM | KVM_REG_SIZE_U32 | KVM_REG_ARM_VFP | \ + KVM_REG_ARM_VFP_##R, \ + offsetof(CPUARMState, vfp.xregs[ARM_VFP_##R]) \ + } + +static const Reg regs[] = { + /* R0_usr .. R14_usr */ + COREREG(usr_regs.uregs[0], regs[0]), + COREREG(usr_regs.uregs[1], regs[1]), + COREREG(usr_regs.uregs[2], regs[2]), + COREREG(usr_regs.uregs[3], regs[3]), + COREREG(usr_regs.uregs[4], regs[4]), + COREREG(usr_regs.uregs[5], regs[5]), + COREREG(usr_regs.uregs[6], regs[6]), + COREREG(usr_regs.uregs[7], regs[7]), + COREREG(usr_regs.uregs[8], usr_regs[0]), + COREREG(usr_regs.uregs[9], usr_regs[1]), + COREREG(usr_regs.uregs[10], usr_regs[2]), + COREREG(usr_regs.uregs[11], usr_regs[3]), + COREREG(usr_regs.uregs[12], usr_regs[4]), + COREREG(usr_regs.uregs[13], banked_r13[0]), + COREREG(usr_regs.uregs[14], banked_r14[0]), + /* R13, R14, SPSR for SVC, ABT, UND, IRQ banks */ + COREREG(svc_regs[0], banked_r13[1]), + COREREG(svc_regs[1], banked_r14[1]), + COREREG(svc_regs[2], banked_spsr[1]), + COREREG(abt_regs[0], banked_r13[2]), + COREREG(abt_regs[1], banked_r14[2]), + COREREG(abt_regs[2], banked_spsr[2]), + COREREG(und_regs[0], banked_r13[3]), + COREREG(und_regs[1], banked_r14[3]), + COREREG(und_regs[2], banked_spsr[3]), + COREREG(irq_regs[0], banked_r13[4]), + COREREG(irq_regs[1], banked_r14[4]), + COREREG(irq_regs[2], banked_spsr[4]), + /* R8_fiq .. R14_fiq and SPSR_fiq */ + COREREG(fiq_regs[0], fiq_regs[0]), + COREREG(fiq_regs[1], fiq_regs[1]), + COREREG(fiq_regs[2], fiq_regs[2]), + COREREG(fiq_regs[3], fiq_regs[3]), + COREREG(fiq_regs[4], fiq_regs[4]), + COREREG(fiq_regs[5], banked_r13[5]), + COREREG(fiq_regs[6], banked_r14[5]), + COREREG(fiq_regs[7], banked_spsr[5]), + /* R15 */ + COREREG(usr_regs.uregs[15], regs[15]), + /* VFP system registers */ + VFPSYSREG(FPSID), + VFPSYSREG(MVFR1), + VFPSYSREG(MVFR0), + VFPSYSREG(FPEXC), + VFPSYSREG(FPINST), + VFPSYSREG(FPINST2), +}; + +int kvm_arch_put_registers(CPUState *cs, int level) +{ + ARMCPU *cpu = ARM_CPU(cs); + CPUARMState *env = &cpu->env; + struct kvm_one_reg r; + int mode, bn; + int ret, i; + uint32_t cpsr, fpscr; + + /* Make sure the banked regs are properly set */ + mode = env->uncached_cpsr & CPSR_M; + bn = bank_number(mode); + if (mode == ARM_CPU_MODE_FIQ) { + memcpy(env->fiq_regs, env->regs + 8, 5 * sizeof(uint32_t)); + } else { + memcpy(env->usr_regs, env->regs + 8, 5 * sizeof(uint32_t)); + } + env->banked_r13[bn] = env->regs[13]; + env->banked_r14[bn] = env->regs[14]; + env->banked_spsr[bn] = env->spsr; + + /* Now we can safely copy stuff down to the kernel */ + for (i = 0; i < ARRAY_SIZE(regs); i++) { + r.id = regs[i].id; + r.addr = (uintptr_t)(env) + regs[i].offset; + ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &r); + if (ret) { + return ret; + } + } + + /* Special cases which aren't a single CPUARMState field */ + cpsr = cpsr_read(env); + r.id = KVM_REG_ARM | KVM_REG_SIZE_U32 | + KVM_REG_ARM_CORE | KVM_REG_ARM_CORE_REG(usr_regs.ARM_cpsr); + r.addr = (uintptr_t)(&cpsr); + ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &r); + if (ret) { + return ret; + } + + /* VFP registers */ + r.id = KVM_REG_ARM | KVM_REG_SIZE_U64 | KVM_REG_ARM_VFP; + for (i = 0; i < 32; i++) { + r.addr = (uintptr_t)(&env->vfp.regs[i]); + ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &r); + if (ret) { + return ret; + } + r.id++; + } + + r.id = KVM_REG_ARM | KVM_REG_SIZE_U32 | KVM_REG_ARM_VFP | + KVM_REG_ARM_VFP_FPSCR; + fpscr = vfp_get_fpscr(env); + r.addr = (uintptr_t)&fpscr; + ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &r); + if (ret) { + return ret; + } + + /* Note that we do not call write_cpustate_to_list() + * here, so we are only writing the tuple list back to + * KVM. This is safe because nothing can change the + * CPUARMState cp15 fields (in particular gdb accesses cannot) + * and so there are no changes to sync. In fact syncing would + * be wrong at this point: for a constant register where TCG and + * KVM disagree about its value, the preceding write_list_to_cpustate() + * would not have had any effect on the CPUARMState value (since the + * register is read-only), and a write_cpustate_to_list() here would + * then try to write the TCG value back into KVM -- this would either + * fail or incorrectly change the value the guest sees. + * + * If we ever want to allow the user to modify cp15 registers via + * the gdb stub, we would need to be more clever here (for instance + * tracking the set of registers kvm_arch_get_registers() successfully + * managed to update the CPUARMState with, and only allowing those + * to be written back up into the kernel). + */ + if (!write_list_to_kvmstate(cpu)) { + return EINVAL; + } + + return ret; +} + +int kvm_arch_get_registers(CPUState *cs) +{ + ARMCPU *cpu = ARM_CPU(cs); + CPUARMState *env = &cpu->env; + struct kvm_one_reg r; + int mode, bn; + int ret, i; + uint32_t cpsr, fpscr; + + for (i = 0; i < ARRAY_SIZE(regs); i++) { + r.id = regs[i].id; + r.addr = (uintptr_t)(env) + regs[i].offset; + ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &r); + if (ret) { + return ret; + } + } + + /* Special cases which aren't a single CPUARMState field */ + r.id = KVM_REG_ARM | KVM_REG_SIZE_U32 | + KVM_REG_ARM_CORE | KVM_REG_ARM_CORE_REG(usr_regs.ARM_cpsr); + r.addr = (uintptr_t)(&cpsr); + ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &r); + if (ret) { + return ret; + } + cpsr_write(env, cpsr, 0xffffffff); + + /* Make sure the current mode regs are properly set */ + mode = env->uncached_cpsr & CPSR_M; + bn = bank_number(mode); + if (mode == ARM_CPU_MODE_FIQ) { + memcpy(env->regs + 8, env->fiq_regs, 5 * sizeof(uint32_t)); + } else { + memcpy(env->regs + 8, env->usr_regs, 5 * sizeof(uint32_t)); + } + env->regs[13] = env->banked_r13[bn]; + env->regs[14] = env->banked_r14[bn]; + env->spsr = env->banked_spsr[bn]; + + /* VFP registers */ + r.id = KVM_REG_ARM | KVM_REG_SIZE_U64 | KVM_REG_ARM_VFP; + for (i = 0; i < 32; i++) { + r.addr = (uintptr_t)(&env->vfp.regs[i]); + ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &r); + if (ret) { + return ret; + } + r.id++; + } + + r.id = KVM_REG_ARM | KVM_REG_SIZE_U32 | KVM_REG_ARM_VFP | + KVM_REG_ARM_VFP_FPSCR; + r.addr = (uintptr_t)&fpscr; + ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &r); + if (ret) { + return ret; + } + vfp_set_fpscr(env, fpscr); + + if (!write_kvmstate_to_list(cpu)) { + return EINVAL; + } + /* Note that it's OK to have registers which aren't in CPUState, + * so we can ignore a failure return here. + */ + write_list_to_cpustate(cpu); + + return 0; +} + +void kvm_arch_reset_vcpu(CPUState *cs) +{ + /* Feed the kernel back its initial register state */ + ARMCPU *cpu = ARM_CPU(cs); + + memmove(cpu->cpreg_values, cpu->cpreg_reset_values, + cpu->cpreg_array_len * sizeof(cpu->cpreg_values[0])); + + if (!write_list_to_kvmstate(cpu)) { + abort(); + } +} + diff --git a/target-arm/kvm_64.c b/target-arm/kvm_64.c new file mode 100644 index 0000000..a6af968 --- /dev/null +++ b/target-arm/kvm_64.c @@ -0,0 +1,39 @@ +/* + * ARM implementation of KVM hooks for AARCH64 + * + * Copyright Christoffer Dall 2009-2010 + * Mian-M. Hamayun 2013, Virtual Open Systems + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#include <stdio.h> +#include <sys/types.h> + +#include <linux/kvm.h> + +#include "qemu-common.h" +#include "sysemu/kvm.h" +#include "kvm_arm.h" + +int kvm_arch_init_vcpu(CPUState *cs) +{ + return 0; +} + +int kvm_arch_put_registers(CPUState *cs, int level) +{ + return 0; +} + +int kvm_arch_get_registers(CPUState *cs) +{ + return 0; +} + +void kvm_arch_reset_vcpu(CPUState *cs) +{ +} + -- 1.8.1.2