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author | Carsten Otte <cotte@de.ibm.com> | 2008-03-25 18:47:26 +0100 |
---|---|---|
committer | Avi Kivity <avi@qumranet.com> | 2008-04-27 12:00:44 +0300 |
commit | ba5c1e9b6ceebdc39343cc03eb39f077abd3c571 (patch) | |
tree | ab07e763ad7d9aad2ef189def5537e73a50c7503 /include | |
parent | 8f2abe6a1e525e878bdf58f68ccd146d543fde84 (diff) | |
download | linux-stable-ba5c1e9b6ceebdc39343cc03eb39f077abd3c571.tar.gz linux-stable-ba5c1e9b6ceebdc39343cc03eb39f077abd3c571.tar.bz2 linux-stable-ba5c1e9b6ceebdc39343cc03eb39f077abd3c571.zip |
KVM: s390: interrupt subsystem, cpu timer, waitpsw
This patch contains the s390 interrupt subsystem (similar to in kernel apic)
including timer interrupts (similar to in-kernel-pit) and enabled wait
(similar to in kernel hlt).
In order to achieve that, this patch also introduces intercept handling
for instruction intercepts, and it implements load control instructions.
This patch introduces an ioctl KVM_S390_INTERRUPT which is valid for both
the vm file descriptors and the vcpu file descriptors. In case this ioctl is
issued against a vm file descriptor, the interrupt is considered floating.
Floating interrupts may be delivered to any virtual cpu in the configuration.
The following interrupts are supported:
SIGP STOP - interprocessor signal that stops a remote cpu
SIGP SET PREFIX - interprocessor signal that sets the prefix register of a
(stopped) remote cpu
INT EMERGENCY - interprocessor interrupt, usually used to signal need_reshed
and for smp_call_function() in the guest.
PROGRAM INT - exception during program execution such as page fault, illegal
instruction and friends
RESTART - interprocessor signal that starts a stopped cpu
INT VIRTIO - floating interrupt for virtio signalisation
INT SERVICE - floating interrupt for signalisations from the system
service processor
struct kvm_s390_interrupt, which is submitted as ioctl parameter when injecting
an interrupt, also carrys parameter data for interrupts along with the interrupt
type. Interrupts on s390 usually have a state that represents the current
operation, or identifies which device has caused the interruption on s390.
kvm_s390_handle_wait() does handle waitpsw in two flavors: in case of a
disabled wait (that is, disabled for interrupts), we exit to userspace. In case
of an enabled wait we set up a timer that equals the cpu clock comparator value
and sleep on a wait queue.
[christian: change virtio interrupt to 0x2603]
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'include')
-rw-r--r-- | include/asm-s390/kvm_host.h | 75 | ||||
-rw-r--r-- | include/linux/kvm.h | 17 |
2 files changed, 92 insertions, 0 deletions
diff --git a/include/asm-s390/kvm_host.h b/include/asm-s390/kvm_host.h index 8965b38d0a32..4fe19305888a 100644 --- a/include/asm-s390/kvm_host.h +++ b/include/asm-s390/kvm_host.h @@ -70,6 +70,7 @@ struct sie_block { __u64 ckc; /* 0x0030 */ __u64 epoch; /* 0x0038 */ __u8 reserved40[4]; /* 0x0040 */ +#define LCTL_CR0 0x8000 __u16 lctl; /* 0x0044 */ __s16 icpua; /* 0x0046 */ __u32 ictl; /* 0x0048 */ @@ -105,8 +106,79 @@ struct kvm_vcpu_stat { u32 exit_external_interrupt; u32 exit_stop_request; u32 exit_validity; + u32 exit_instruction; + u32 instruction_lctl; + u32 instruction_lctg; + u32 exit_program_interruption; + u32 exit_instr_and_program; + u32 deliver_emergency_signal; + u32 deliver_service_signal; + u32 deliver_virtio_interrupt; + u32 deliver_stop_signal; + u32 deliver_prefix_signal; + u32 deliver_restart_signal; + u32 deliver_program_int; + u32 exit_wait_state; }; +struct io_info { + __u16 subchannel_id; /* 0x0b8 */ + __u16 subchannel_nr; /* 0x0ba */ + __u32 io_int_parm; /* 0x0bc */ + __u32 io_int_word; /* 0x0c0 */ +}; + +struct ext_info { + __u32 ext_params; + __u64 ext_params2; +}; + +#define PGM_OPERATION 0x01 +#define PGM_PRIVILEGED_OPERATION 0x02 +#define PGM_EXECUTE 0x03 +#define PGM_PROTECTION 0x04 +#define PGM_ADDRESSING 0x05 +#define PGM_SPECIFICATION 0x06 +#define PGM_DATA 0x07 + +struct pgm_info { + __u16 code; +}; + +struct prefix_info { + __u32 address; +}; + +struct interrupt_info { + struct list_head list; + u64 type; + union { + struct io_info io; + struct ext_info ext; + struct pgm_info pgm; + struct prefix_info prefix; + }; +}; + +struct local_interrupt { + spinlock_t lock; + struct list_head list; + atomic_t active; + struct float_interrupt *float_int; + int timer_due; /* event indicator for waitqueue below */ + wait_queue_head_t wq; +}; + +struct float_interrupt { + spinlock_t lock; + struct list_head list; + atomic_t active; + int next_rr_cpu; + unsigned long idle_mask [(64 + sizeof(long) - 1) / sizeof(long)]; + struct local_interrupt *local_int[64]; +}; + + struct kvm_vcpu_arch { struct sie_block *sie_block; unsigned long guest_gprs[16]; @@ -114,6 +186,8 @@ struct kvm_vcpu_arch { unsigned int host_acrs[NUM_ACRS]; s390_fp_regs guest_fpregs; unsigned int guest_acrs[NUM_ACRS]; + struct local_interrupt local_int; + struct timer_list ckc_timer; }; struct kvm_vm_stat { @@ -125,6 +199,7 @@ struct kvm_arch{ unsigned long guest_memsize; struct sca_block *sca; debug_info_t *dbf; + struct float_interrupt float_int; }; extern int sie64a(struct sie_block *, __u64 *); diff --git a/include/linux/kvm.h b/include/linux/kvm.h index f2acd6b9ab4d..029f0284a2fd 100644 --- a/include/linux/kvm.h +++ b/include/linux/kvm.h @@ -219,6 +219,21 @@ struct kvm_s390_psw { __u64 addr; }; +/* valid values for type in kvm_s390_interrupt */ +#define KVM_S390_SIGP_STOP 0xfffe0000u +#define KVM_S390_PROGRAM_INT 0xfffe0001u +#define KVM_S390_SIGP_SET_PREFIX 0xfffe0002u +#define KVM_S390_RESTART 0xfffe0003u +#define KVM_S390_INT_VIRTIO 0xffff2603u +#define KVM_S390_INT_SERVICE 0xffff2401u +#define KVM_S390_INT_EMERGENCY 0xffff1201u + +struct kvm_s390_interrupt { + __u32 type; + __u32 parm; + __u64 parm64; +}; + #define KVMIO 0xAE /* @@ -307,6 +322,8 @@ struct kvm_s390_psw { #define KVM_TPR_ACCESS_REPORTING _IOWR(KVMIO, 0x92, struct kvm_tpr_access_ctl) /* Available with KVM_CAP_VAPIC */ #define KVM_SET_VAPIC_ADDR _IOW(KVMIO, 0x93, struct kvm_vapic_addr) +/* valid for virtual machine (for floating interrupt)_and_ vcpu */ +#define KVM_S390_INTERRUPT _IOW(KVMIO, 0x94, struct kvm_s390_interrupt) /* store status for s390 */ #define KVM_S390_STORE_STATUS_NOADDR (-1ul) #define KVM_S390_STORE_STATUS_PREFIXED (-2ul) |