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s390x: Add KVM PV dump interface

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Let's add a few bits of code which hide the new KVM PV dump API from
us via new functions.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Reviewed-by: Steffen Eiden <seiden@linux.ibm.com>
[ Marc-André: fix up for compilation issue ]
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20221017083822.43118-10-frankja@linux.ibm.com>
This commit is contained in:
Janosch Frank 2022-10-17 08:38:21 +00:00 committed by Marc-André Lureau
parent 5433669c7a
commit 753ca06f47
2 changed files with 60 additions and 0 deletions
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51
hw/s390x/pv.c
View File

@ -175,6 +175,57 @@ bool kvm_s390_pv_info_basic_valid(void)
return info_valid;
}
static int s390_pv_dump_cmd(uint64_t subcmd, uint64_t uaddr, uint64_t gaddr,
uint64_t len)
{
struct kvm_s390_pv_dmp dmp = {
.subcmd = subcmd,
.buff_addr = uaddr,
.buff_len = len,
.gaddr = gaddr,
};
int ret;
ret = s390_pv_cmd(KVM_PV_DUMP, (void *)&dmp);
if (ret) {
error_report("KVM DUMP command %ld failed", subcmd);
}
return ret;
}
int kvm_s390_dump_cpu(S390CPU *cpu, void *buff)
{
struct kvm_s390_pv_dmp dmp = {
.subcmd = KVM_PV_DUMP_CPU,
.buff_addr = (uint64_t)buff,
.gaddr = 0,
.buff_len = info_dump.dump_cpu_buffer_len,
};
struct kvm_pv_cmd pv = {
.cmd = KVM_PV_DUMP,
.data = (uint64_t)&dmp,
};
return kvm_vcpu_ioctl(CPU(cpu), KVM_S390_PV_CPU_COMMAND, &pv);
}
int kvm_s390_dump_init(void)
{
return s390_pv_dump_cmd(KVM_PV_DUMP_INIT, 0, 0, 0);
}
int kvm_s390_dump_mem_state(uint64_t gaddr, size_t len, void *dest)
{
return s390_pv_dump_cmd(KVM_PV_DUMP_CONFIG_STOR_STATE, (uint64_t)dest,
gaddr, len);
}
int kvm_s390_dump_completion_data(void *buff)
{
return s390_pv_dump_cmd(KVM_PV_DUMP_COMPLETE, (uint64_t)buff, 0,
info_dump.dump_config_finalize_len);
}
#define TYPE_S390_PV_GUEST "s390-pv-guest"
OBJECT_DECLARE_SIMPLE_TYPE(S390PVGuest, S390_PV_GUEST)

9
include/hw/s390x/pv.h
View File

@ -51,6 +51,10 @@ uint64_t kvm_s390_pv_dmp_get_size_cpu(void);
uint64_t kvm_s390_pv_dmp_get_size_mem_state(void);
uint64_t kvm_s390_pv_dmp_get_size_completion_data(void);
bool kvm_s390_pv_info_basic_valid(void);
int kvm_s390_dump_init(void);
int kvm_s390_dump_cpu(S390CPU *cpu, void *buff);
int kvm_s390_dump_mem_state(uint64_t addr, size_t len, void *dest);
int kvm_s390_dump_completion_data(void *buff);
#else /* CONFIG_KVM */
static inline bool s390_is_pv(void) { return false; }
static inline int s390_pv_query_info(void) { return 0; }
@ -66,6 +70,11 @@ static inline uint64_t kvm_s390_pv_dmp_get_size_cpu(void) { return 0; }
static inline uint64_t kvm_s390_pv_dmp_get_size_mem_state(void) { return 0; }
static inline uint64_t kvm_s390_pv_dmp_get_size_completion_data(void) { return 0; }
static inline bool kvm_s390_pv_info_basic_valid(void) { return false; }
static inline int kvm_s390_dump_init(void) { return 0; }
static inline int kvm_s390_dump_cpu(S390CPU *cpu, void *buff) { return 0; }
static inline int kvm_s390_dump_mem_state(uint64_t addr, size_t len,
void *dest) { return 0; }
static inline int kvm_s390_dump_completion_data(void *buff) { return 0; }
#endif /* CONFIG_KVM */
int s390_pv_kvm_init(ConfidentialGuestSupport *cgs, Error **errp);