x86/mce-inject: Reset injection struct after injection

Clear the MCE struct which is used for collecting the injection details
after injection.

Also, populate it with more details from the machine.
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20180905081954.10391-1-bp@alien8.de

arch/x86/kernel/cpu/mcheck/mce-inject.c

@@ -108,6 +108,9 @@ static void setup_inj_struct(struct mce *m)
 	memset(m, 0, sizeof(struct mce));
 
 	m->cpuvendor = boot_cpu_data.x86_vendor;
+	m->time	     = ktime_get_real_seconds();
+	m->cpuid     = cpuid_eax(1);
+	m->microcode = boot_cpu_data.microcode;
 }
 
 /* Update fake mce registers on current CPU. */
@@ -576,6 +579,9 @@ static int inj_bank_set(void *data, u64 val)
 	m->bank = val;
 	do_inject();
 
+	/* Reset injection struct */
+	setup_inj_struct(&i_mce);
+
 	return 0;
 }