qemu/include/sysemu/cpus.h
Tom Lendacky 92a5199b29 sev/i386: Don't allow a system reset under an SEV-ES guest
An SEV-ES guest does not allow register state to be altered once it has
been measured. When an SEV-ES guest issues a reboot command, Qemu will
reset the vCPU state and resume the guest. This will cause failures under
SEV-ES. Prevent that from occuring by introducing an arch-specific
callback that returns a boolean indicating whether vCPUs are resettable.

Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: Aleksandar Rikalo <aleksandar.rikalo@syrmia.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: David Hildenbrand <david@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Venu Busireddy <venu.busireddy@oracle.com>
Message-Id: <1ac39c441b9a3e970e9556e1cc29d0a0814de6fd.1611682609.git.thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2021-02-16 17:15:39 +01:00

61 lines
1.5 KiB
C

#ifndef QEMU_CPUS_H
#define QEMU_CPUS_H
#include "qemu/timer.h"
#include "sysemu/accel-ops.h"
/* register accel-specific operations */
void cpus_register_accel(const AccelOpsClass *i);
/* accel/dummy-cpus.c */
/* Create a dummy vcpu for AccelOpsClass->create_vcpu_thread */
void dummy_start_vcpu_thread(CPUState *);
/* interface available for cpus accelerator threads */
/* For temporary buffers for forming a name */
#define VCPU_THREAD_NAME_SIZE 16
void cpus_kick_thread(CPUState *cpu);
bool cpu_work_list_empty(CPUState *cpu);
bool cpu_thread_is_idle(CPUState *cpu);
bool all_cpu_threads_idle(void);
bool cpu_can_run(CPUState *cpu);
void qemu_wait_io_event_common(CPUState *cpu);
void qemu_wait_io_event(CPUState *cpu);
void cpu_thread_signal_created(CPUState *cpu);
void cpu_thread_signal_destroyed(CPUState *cpu);
void cpu_handle_guest_debug(CPUState *cpu);
/* end interface for cpus accelerator threads */
bool qemu_in_vcpu_thread(void);
void qemu_init_cpu_loop(void);
void resume_all_vcpus(void);
void pause_all_vcpus(void);
void cpu_stop_current(void);
extern int icount_align_option;
/* Unblock cpu */
void qemu_cpu_kick_self(void);
bool cpus_are_resettable(void);
void cpu_synchronize_all_states(void);
void cpu_synchronize_all_post_reset(void);
void cpu_synchronize_all_post_init(void);
void cpu_synchronize_all_pre_loadvm(void);
#ifndef CONFIG_USER_ONLY
/* vl.c */
/* *-user doesn't have configurable SMP topology */
extern int smp_cores;
extern int smp_threads;
#endif
void list_cpus(const char *optarg);
#endif