From fcf5ef2ab52c621a4617ebbef36bf43b4003f4c0 Mon Sep 17 00:00:00 2001 From: Thomas Huth Date: Tue, 11 Oct 2016 08:56:52 +0200 Subject: Move target-* CPU file into a target/ folder We've currently got 18 architectures in QEMU, and thus 18 target-xxx folders in the root folder of the QEMU source tree. More architectures (e.g. RISC-V, AVR) are likely to be included soon, too, so the main folder of the QEMU sources slowly gets quite overcrowded with the target-xxx folders. To disburden the main folder a little bit, let's move the target-xxx folders into a dedicated target/ folder, so that target-xxx/ simply becomes target/xxx/ instead. Acked-by: Laurent Vivier [m68k part] Acked-by: Bastian Koppelmann [tricore part] Acked-by: Michael Walle [lm32 part] Acked-by: Cornelia Huck [s390x part] Reviewed-by: Christian Borntraeger [s390x part] Acked-by: Eduardo Habkost [i386 part] Acked-by: Artyom Tarasenko [sparc part] Acked-by: Richard Henderson [alpha part] Acked-by: Max Filippov [xtensa part] Reviewed-by: David Gibson [ppc part] Acked-by: Edgar E. Iglesias [crisµblaze part] Acked-by: Guan Xuetao [unicore32 part] Signed-off-by: Thomas Huth --- target/arm/kvm_arm.h | 291 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 291 insertions(+) create mode 100644 target/arm/kvm_arm.h (limited to 'target/arm/kvm_arm.h') diff --git a/target/arm/kvm_arm.h b/target/arm/kvm_arm.h new file mode 100644 index 0000000000..633d08828a --- /dev/null +++ b/target/arm/kvm_arm.h @@ -0,0 +1,291 @@ +/* + * QEMU KVM support -- ARM specific functions. + * + * Copyright (c) 2012 Linaro Limited + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#ifndef QEMU_KVM_ARM_H +#define QEMU_KVM_ARM_H + +#include "sysemu/kvm.h" +#include "exec/memory.h" +#include "qemu/error-report.h" + +/** + * kvm_arm_vcpu_init: + * @cs: CPUState + * + * Initialize (or reinitialize) the VCPU by invoking the + * KVM_ARM_VCPU_INIT ioctl with the CPU type and feature + * bitmask specified in the CPUState. + * + * Returns: 0 if success else < 0 error code + */ +int kvm_arm_vcpu_init(CPUState *cs); + +/** + * kvm_arm_register_device: + * @mr: memory region for this device + * @devid: the KVM device ID + * @group: device control API group for setting addresses + * @attr: device control API address type + * @dev_fd: device control device file descriptor (or -1 if not supported) + * + * Remember the memory region @mr, and when it is mapped by the + * machine model, tell the kernel that base address using the + * KVM_ARM_SET_DEVICE_ADDRESS ioctl or the newer device control API. @devid + * should be the ID of the device as defined by KVM_ARM_SET_DEVICE_ADDRESS or + * the arm-vgic device in the device control API. + * The machine model may map + * and unmap the device multiple times; the kernel will only be told the final + * address at the point where machine init is complete. + */ +void kvm_arm_register_device(MemoryRegion *mr, uint64_t devid, uint64_t group, + uint64_t attr, int dev_fd); + +/** + * kvm_arm_init_cpreg_list: + * @cs: CPUState + * + * Initialize the CPUState's cpreg list according to the kernel's + * definition of what CPU registers it knows about (and throw away + * the previous TCG-created cpreg list). + * + * Returns: 0 if success, else < 0 error code + */ +int kvm_arm_init_cpreg_list(ARMCPU *cpu); + +/** + * kvm_arm_reg_syncs_via_cpreg_list + * regidx: KVM register index + * + * Return true if this KVM register should be synchronized via the + * cpreg list of arbitrary system registers, false if it is synchronized + * by hand using code in kvm_arch_get/put_registers(). + */ +bool kvm_arm_reg_syncs_via_cpreg_list(uint64_t regidx); + +/** + * kvm_arm_cpreg_level + * regidx: KVM register index + * + * Return the level of this coprocessor/system register. Return value is + * either KVM_PUT_RUNTIME_STATE, KVM_PUT_RESET_STATE, or KVM_PUT_FULL_STATE. + */ +int kvm_arm_cpreg_level(uint64_t regidx); + +/** + * write_list_to_kvmstate: + * @cpu: ARMCPU + * @level: the state level to sync + * + * For each register listed in the ARMCPU cpreg_indexes list, write + * its value from the cpreg_values list into the kernel (via ioctl). + * This updates KVM's working data structures from TCG data or + * from incoming migration state. + * + * Returns: true if all register values were updated correctly, + * false if some register was unknown to the kernel or could not + * be written (eg constant register with the wrong value). + * Note that we do not stop early on failure -- we will attempt + * writing all registers in the list. + */ +bool write_list_to_kvmstate(ARMCPU *cpu, int level); + +/** + * write_kvmstate_to_list: + * @cpu: ARMCPU + * + * For each register listed in the ARMCPU cpreg_indexes list, write + * its value from the kernel into the cpreg_values list. This is used to + * copy info from KVM's working data structures into TCG or + * for outbound migration. + * + * Returns: true if all register values were read correctly, + * false if some register was unknown or could not be read. + * Note that we do not stop early on failure -- we will attempt + * reading all registers in the list. + */ +bool write_kvmstate_to_list(ARMCPU *cpu); + +/** + * kvm_arm_reset_vcpu: + * @cpu: ARMCPU + * + * Called at reset time to kernel registers to their initial values. + */ +void kvm_arm_reset_vcpu(ARMCPU *cpu); + +#ifdef CONFIG_KVM +/** + * kvm_arm_create_scratch_host_vcpu: + * @cpus_to_try: array of QEMU_KVM_ARM_TARGET_* values (terminated with + * QEMU_KVM_ARM_TARGET_NONE) to try as fallback if the kernel does not + * know the PREFERRED_TARGET ioctl. Passing NULL is the same as passing + * an empty array. + * @fdarray: filled in with kvmfd, vmfd, cpufd file descriptors in that order + * @init: filled in with the necessary values for creating a host + * vcpu. If NULL is provided, will not init the vCPU (though the cpufd + * will still be set up). + * + * Create a scratch vcpu in its own VM of the type preferred by the host + * kernel (as would be used for '-cpu host'), for purposes of probing it + * for capabilities. + * + * Returns: true on success (and fdarray and init are filled in), + * false on failure (and fdarray and init are not valid). + */ +bool kvm_arm_create_scratch_host_vcpu(const uint32_t *cpus_to_try, + int *fdarray, + struct kvm_vcpu_init *init); + +/** + * kvm_arm_destroy_scratch_host_vcpu: + * @fdarray: array of fds as set up by kvm_arm_create_scratch_host_vcpu + * + * Tear down the scratch vcpu created by kvm_arm_create_scratch_host_vcpu. + */ +void kvm_arm_destroy_scratch_host_vcpu(int *fdarray); + +#define TYPE_ARM_HOST_CPU "host-" TYPE_ARM_CPU +#define ARM_HOST_CPU_CLASS(klass) \ + OBJECT_CLASS_CHECK(ARMHostCPUClass, (klass), TYPE_ARM_HOST_CPU) +#define ARM_HOST_CPU_GET_CLASS(obj) \ + OBJECT_GET_CLASS(ARMHostCPUClass, (obj), TYPE_ARM_HOST_CPU) + +typedef struct ARMHostCPUClass { + /*< private >*/ + ARMCPUClass parent_class; + /*< public >*/ + + uint64_t features; + uint32_t target; + const char *dtb_compatible; +} ARMHostCPUClass; + +/** + * kvm_arm_get_host_cpu_features: + * @ahcc: ARMHostCPUClass to fill in + * + * Probe the capabilities of the host kernel's preferred CPU and fill + * in the ARMHostCPUClass struct accordingly. + */ +bool kvm_arm_get_host_cpu_features(ARMHostCPUClass *ahcc); + + +/** + * kvm_arm_sync_mpstate_to_kvm + * @cpu: ARMCPU + * + * If supported set the KVM MP_STATE based on QEMU's model. + */ +int kvm_arm_sync_mpstate_to_kvm(ARMCPU *cpu); + +/** + * kvm_arm_sync_mpstate_to_qemu + * @cpu: ARMCPU + * + * If supported get the MP_STATE from KVM and store in QEMU's model. + */ +int kvm_arm_sync_mpstate_to_qemu(ARMCPU *cpu); + +int kvm_arm_vgic_probe(void); + +int kvm_arm_pmu_create(CPUState *cs, int irq); + +#else + +static inline int kvm_arm_vgic_probe(void) +{ + return 0; +} + +static inline int kvm_arm_pmu_create(CPUState *cs, int irq) +{ + return 0; +} + +#endif + +static inline const char *gic_class_name(void) +{ + return kvm_irqchip_in_kernel() ? "kvm-arm-gic" : "arm_gic"; +} + +/** + * gicv3_class_name + * + * Return name of GICv3 class to use depending on whether KVM acceleration is + * in use. May throw an error if the chosen implementation is not available. + * + * Returns: class name to use + */ +static inline const char *gicv3_class_name(void) +{ + if (kvm_irqchip_in_kernel()) { +#ifdef TARGET_AARCH64 + return "kvm-arm-gicv3"; +#else + error_report("KVM GICv3 acceleration is not supported on this " + "platform"); + exit(1); +#endif + } else { + return "arm-gicv3"; + } +} + +/** + * kvm_arm_handle_debug: + * @cs: CPUState + * @debug_exit: debug part of the KVM exit structure + * + * Returns: TRUE if the debug exception was handled. + */ +bool kvm_arm_handle_debug(CPUState *cs, struct kvm_debug_exit_arch *debug_exit); + +/** + * kvm_arm_hw_debug_active: + * @cs: CPU State + * + * Return: TRUE if any hardware breakpoints in use. + */ + +bool kvm_arm_hw_debug_active(CPUState *cs); + +/** + * kvm_arm_copy_hw_debug_data: + * + * @ptr: kvm_guest_debug_arch structure + * + * Copy the architecture specific debug registers into the + * kvm_guest_debug ioctl structure. + */ +struct kvm_guest_debug_arch; + +void kvm_arm_copy_hw_debug_data(struct kvm_guest_debug_arch *ptr); + +/** + * its_class_name + * + * Return the ITS class name to use depending on whether KVM acceleration + * and KVM CAP_SIGNAL_MSI are supported + * + * Returns: class name to use or NULL + */ +static inline const char *its_class_name(void) +{ + if (kvm_irqchip_in_kernel()) { + /* KVM implementation requires this capability */ + return kvm_direct_msi_enabled() ? "arm-its-kvm" : NULL; + } else { + /* Software emulation is not implemented yet */ + return NULL; + } +} + +#endif -- cgit v1.2.3