From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:55333) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZAgwY-0000jM-U0 for qemu-devel@nongnu.org; Thu, 02 Jul 2015 12:02:31 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZAgwU-0000SP-Tw for qemu-devel@nongnu.org; Thu, 02 Jul 2015 12:02:30 -0400 Received: from mailhub.sw.ru ([195.214.232.25]:3572 helo=relay.sw.ru) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZAgwU-0000S4-Fy for qemu-devel@nongnu.org; Thu, 02 Jul 2015 12:02:26 -0400 From: "Denis V. Lunev" Date: Thu, 2 Jul 2015 19:01:59 +0300 Message-Id: <1435852920-5347-9-git-send-email-den@openvz.org> In-Reply-To: <1435852920-5347-1-git-send-email-den@openvz.org> References: <1435852920-5347-1-git-send-email-den@openvz.org> Subject: [Qemu-devel] [PATCH 8/12] kvm/x86: add sending hyper-v crash notification to user space List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kvm@vger.kernel.org, Gleb Natapov , qemu-devel@nongnu.org, Paolo Bonzini , Andrey Smetanin , "Denis V. Lunev" From: Andrey Smetanin 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 occured. Signed-off-by: Andrey Smetanin Signed-off-by: Denis V. Lunev Reviewed-by: Peter Hornyack CC: Paolo Bonzini CC: Gleb Natapov --- Documentation/virtual/kvm/api.txt | 5 +++++ arch/x86/kvm/x86.c | 6 ++++++ include/uapi/linux/kvm.h | 1 + 3 files changed, 12 insertions(+) diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index a7926a9..a4ebcb7 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -3277,6 +3277,7 @@ should put the acknowledged interrupt vector into the 'epr' field. struct { #define KVM_SYSTEM_EVENT_SHUTDOWN 1 #define KVM_SYSTEM_EVENT_RESET 2 +#define KVM_SYSTEM_EVENT_CRASH 3 __u32 type; __u64 flags; } system_event; @@ -3296,6 +3297,10 @@ Valid values for 'type' are: KVM_SYSTEM_EVENT_RESET -- the guest has requested a reset of the VM. 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. + 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. */ char padding[256]; diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index b4c2767..28e79c0 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -6265,6 +6265,12 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu) vcpu_scan_ioapic(vcpu); if (kvm_check_request(KVM_REQ_APIC_PAGE_RELOAD, 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) { diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 5da4ca3..c8c6b8b 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -317,6 +317,7 @@ struct kvm_run { struct { #define KVM_SYSTEM_EVENT_SHUTDOWN 1 #define KVM_SYSTEM_EVENT_RESET 2 +#define KVM_SYSTEM_EVENT_CRASH 3 __u32 type; __u64 flags; } system_event; -- 2.1.4