OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

kvm/x86: add sending hyper-v crash notification to user space 

Sending of notification is done by exiting vcpu to user space
if KVM_REQ_HV_CRASH is enabled for vcpu. At exit to user space
the kvm_run structure contains system_event with type
KVM_SYSTEM_EVENT_CRASH to notify about guest crash occurred.

Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Peter Hornyack <peterhornyack@google.com>
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: Gleb Natapov <gleb@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Andrey Smetanin 2015-07-03 15:01:41 +03:00 committed by Paolo Bonzini
parent e7d9513b60
commit 2ce7918990
4 changed files with 13 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
Documentation/virtual/kvm/api.txt
View File

@ -3277,6 +3277,7 @@ should put the acknowledged interrupt vector into the 'epr' field.
struct { struct {
#define KVM_SYSTEM_EVENT_SHUTDOWN 1 #define KVM_SYSTEM_EVENT_SHUTDOWN 1
#define KVM_SYSTEM_EVENT_RESET 2 #define KVM_SYSTEM_EVENT_RESET 2
#define KVM_SYSTEM_EVENT_CRASH 3
__u32 type; __u32 type;
__u64 flags; __u64 flags;
} system_event; } system_event;
@ -3296,6 +3297,10 @@ Valid values for 'type' are:
KVM_SYSTEM_EVENT_RESET -- the guest has requested a reset of the VM. KVM_SYSTEM_EVENT_RESET -- the guest has requested a reset of the VM.
As with SHUTDOWN, userspace can choose to ignore the request, or As with SHUTDOWN, userspace can choose to ignore the request, or
to schedule the reset to occur in the future and may call KVM_RUN again. to schedule the reset to occur in the future and may call KVM_RUN again.
KVM_SYSTEM_EVENT_CRASH -- the guest crash occurred and the guest
has requested a crash condition maintenance. Userspace can choose
to ignore the request, or to gather VM memory core dump and/or
reset/shutdown of the VM.
/* Fix the size of the union. */ /* Fix the size of the union. */
char padding[256]; char padding[256];

6
arch/x86/kvm/x86.c
View File

@ -6263,6 +6263,12 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
vcpu_scan_ioapic(vcpu); vcpu_scan_ioapic(vcpu);
if (kvm_check_request(KVM_REQ_APIC_PAGE_RELOAD, vcpu)) if (kvm_check_request(KVM_REQ_APIC_PAGE_RELOAD, vcpu))
kvm_vcpu_reload_apic_access_page(vcpu); kvm_vcpu_reload_apic_access_page(vcpu);
if (kvm_check_request(KVM_REQ_HV_CRASH, vcpu)) {
vcpu->run->exit_reason = KVM_EXIT_SYSTEM_EVENT;
vcpu->run->system_event.type = KVM_SYSTEM_EVENT_CRASH;
r = 0;
goto out;
}
} }
if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) { if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) {

1
include/linux/kvm_host.h
View File

@ -139,6 +139,7 @@ static inline bool is_error_page(struct page *page)
#define KVM_REQ_DISABLE_IBS 24 #define KVM_REQ_DISABLE_IBS 24
#define KVM_REQ_APIC_PAGE_RELOAD 25 #define KVM_REQ_APIC_PAGE_RELOAD 25
#define KVM_REQ_SMI 26 #define KVM_REQ_SMI 26
#define KVM_REQ_HV_CRASH 27
#define KVM_USERSPACE_IRQ_SOURCE_ID 0 #define KVM_USERSPACE_IRQ_SOURCE_ID 0
#define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1 #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1

1
include/uapi/linux/kvm.h
View File

@ -317,6 +317,7 @@ struct kvm_run {
struct { struct {
#define KVM_SYSTEM_EVENT_SHUTDOWN 1 #define KVM_SYSTEM_EVENT_SHUTDOWN 1
#define KVM_SYSTEM_EVENT_RESET 2 #define KVM_SYSTEM_EVENT_RESET 2
#define KVM_SYSTEM_EVENT_CRASH 3
__u32 type; __u32 type;
__u64 flags; __u64 flags;
} system_event; } system_event;