Register the guest crash reporter to panic_notifier_list, which will be called at panic time. Guest crash reporter will report the crash to the hypervisor through a hypercall.
Co-developed-by: Brennan Lamoreaux <[email protected]> Signed-off-by: Brennan Lamoreaux <[email protected]> Signed-off-by: Alexey Makhalov <[email protected]> --- arch/x86/include/asm/vmware.h | 1 + arch/x86/kernel/cpu/vmware.c | 21 +++++++++++++++++++++ 2 files changed, 22 insertions(+) diff --git a/arch/x86/include/asm/vmware.h b/arch/x86/include/asm/vmware.h index c23164503e54..bf6141353774 100644 --- a/arch/x86/include/asm/vmware.h +++ b/arch/x86/include/asm/vmware.h @@ -97,6 +97,7 @@ #define VMWARE_CMD_GETHZ 45 #define VMWARE_CMD_GETVCPU_INFO 68 #define VMWARE_CMD_STEALCLOCK 91 +#define VMWARE_CMD_REPORTGUESTCRASH 102 /* * Hypercall command mask: * bits [6:0] command, range [0, 127] diff --git a/arch/x86/kernel/cpu/vmware.c b/arch/x86/kernel/cpu/vmware.c index d9753b1aba58..8997295a5a5c 100644 --- a/arch/x86/kernel/cpu/vmware.c +++ b/arch/x86/kernel/cpu/vmware.c @@ -31,6 +31,7 @@ #include <linux/static_call.h> #include <linux/sched/cputime.h> #include <linux/kmsg_dump.h> +#include <linux/panic_notifier.h> #include <asm/div64.h> #include <asm/x86_init.h> #include <asm/hypervisor.h> @@ -451,6 +452,24 @@ static void __init vmware_paravirt_ops_setup(void) #define vmware_paravirt_ops_setup() do {} while (0) #endif +static int vmware_report_guest_crash(struct notifier_block *self, + unsigned long action, void *data) +{ + vmware_hypercall1(VMWARE_CMD_REPORTGUESTCRASH, 0); + return 0; +} + +static struct notifier_block guest_crash_reporter = { + .notifier_call = vmware_report_guest_crash +}; + +static int __init register_guest_crash_reporter(void) +{ + atomic_notifier_chain_register(&panic_notifier_list, + &guest_crash_reporter); + + return 0; +} /* * VMware hypervisor takes care of exporting a reliable TSC to the guest. * Still, due to timing difference when running on virtual cpus, the TSC can @@ -545,6 +564,8 @@ static void __init vmware_platform_setup(void) vmware_set_capabilities(); kmsg_dump_register(&kmsg_dumper); + + register_guest_crash_reporter(); } static u8 __init get_hypercall_mode(void) -- 2.43.7
