diff options
| author | Janosch Frank <[email protected]> | 2022-05-17 16:36:25 +0000 |
|---|---|---|
| committer | Christian Borntraeger <[email protected]> | 2022-06-01 16:57:14 +0200 |
| commit | 8aba09588d2af37c6cc1a781b87d1d91ebf389ae (patch) | |
| tree | 790f5abd6888569755d0a1da1854bbfc42f3ac8a /arch/s390/kvm/pv.c | |
| parent | 0460eb35b443f73f8a8e3be1ea87bd690a852e20 (diff) | |
KVM: s390: Add CPU dump functionality
The previous patch introduced the per-VM dump functions now let's
focus on dumping the VCPU state via the newly introduced
KVM_S390_PV_CPU_COMMAND ioctl which mirrors the VM UV ioctl and can be
extended with new commands later.
Signed-off-by: Janosch Frank <[email protected]>
Reviewed-by: Claudio Imbrenda <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Message-Id: <[email protected]>
Signed-off-by: Christian Borntraeger <[email protected]>
Diffstat (limited to 'arch/s390/kvm/pv.c')
| -rw-r--r-- | arch/s390/kvm/pv.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/arch/s390/kvm/pv.c b/arch/s390/kvm/pv.c index e9912113879c..b4a499b10b67 100644 --- a/arch/s390/kvm/pv.c +++ b/arch/s390/kvm/pv.c @@ -300,6 +300,22 @@ int kvm_s390_pv_set_cpu_state(struct kvm_vcpu *vcpu, u8 state) return 0; } +int kvm_s390_pv_dump_cpu(struct kvm_vcpu *vcpu, void *buff, u16 *rc, u16 *rrc) +{ + struct uv_cb_dump_cpu uvcb = { + .header.cmd = UVC_CMD_DUMP_CPU, + .header.len = sizeof(uvcb), + .cpu_handle = vcpu->arch.pv.handle, + .dump_area_origin = (u64)buff, + }; + int cc; + + cc = uv_call_sched(0, (u64)&uvcb); + *rc = uvcb.header.rc; + *rrc = uvcb.header.rrc; + return cc; +} + /* Size of the cache for the storage state dump data. 1MB for now */ #define DUMP_BUFF_LEN HPAGE_SIZE |