#include <asm/ctl_reg.h>
struct mcck_struct {
- int kill_task;
- int channel_report;
- int warning;
- unsigned long long mcck_code;
+ unsigned int kill_task : 1;
+ unsigned int channel_report : 1;
+ unsigned int warning : 1;
+ unsigned int etr_queue : 1;
+ unsigned int stp_queue : 1;
+ unsigned long mcck_code;
};
static DEFINE_PER_CPU(struct mcck_struct, cpu_mcck);
-static void s390_handle_damage(char *msg)
+static void s390_handle_damage(void)
{
smp_send_stop();
disabled_wait((unsigned long) __builtin_return_address(0));
if (xchg(&mchchk_wng_posted, 1) == 0)
kill_cad_pid(SIGPWR, 1);
}
+ if (mcck.etr_queue)
+ etr_queue_work();
+ if (mcck.stp_queue)
+ stp_queue_work();
if (mcck.kill_task) {
local_irq_enable();
printk(KERN_EMERG "mcck: Terminating task because of machine "
- "malfunction (code 0x%016llx).\n", mcck.mcck_code);
+ "malfunction (code 0x%016lx).\n", mcck.mcck_code);
printk(KERN_EMERG "mcck: task: %s, pid: %d.\n",
current->comm, current->pid);
do_exit(SIGSEGV);
* returns 0 if all registers could be validated
* returns 1 otherwise
*/
-static int notrace s390_revalidate_registers(struct mci *mci)
+static int notrace s390_validate_registers(union mci mci)
{
int kill_task;
u64 zero;
kill_task = 0;
zero = 0;
- if (!mci->gr) {
+ if (!mci.gr) {
/*
* General purpose registers couldn't be restored and have
* unknown contents. Process needs to be terminated.
*/
kill_task = 1;
}
- if (!mci->fp) {
+ if (!mci.fp) {
/*
* Floating point registers can't be restored and
* therefore the process needs to be terminated.
}
fpt_save_area = &S390_lowcore.floating_pt_save_area;
fpt_creg_save_area = &S390_lowcore.fpt_creg_save_area;
- if (!mci->fc) {
+ if (!mci.fc) {
/*
* Floating point control register can't be restored.
* Task will be terminated.
asm volatile("lfpc 0(%0)" : : "a" (fpt_creg_save_area));
if (!MACHINE_HAS_VX) {
- /* Revalidate floating point registers */
+ /* Validate floating point registers */
asm volatile(
" ld 0,0(%0)\n"
" ld 1,8(%0)\n"
" ld 15,120(%0)\n"
: : "a" (fpt_save_area));
} else {
- /* Revalidate vector registers */
+ /* Validate vector registers */
union ctlreg0 cr0;
- if (!mci->vr) {
+ if (!mci.vr) {
/*
* Vector registers can't be restored and therefore
* the process needs to be terminated.
cr0.val = S390_lowcore.cregs_save_area[0];
cr0.afp = cr0.vx = 1;
__ctl_load(cr0.val, 0, 0);
- restore_vx_regs((__vector128 *)
- &S390_lowcore.vector_save_area);
+ asm volatile(
+ " la 1,%0\n"
+ " .word 0xe70f,0x1000,0x0036\n" /* vlm 0,15,0(1) */
+ " .word 0xe70f,0x1100,0x0c36\n" /* vlm 16,31,256(1) */
+ : : "Q" (*(struct vx_array *)
+ &S390_lowcore.vector_save_area) : "1");
__ctl_load(S390_lowcore.cregs_save_area[0], 0, 0);
}
- /* Revalidate access registers */
+ /* Validate access registers */
asm volatile(
" lam 0,15,0(%0)"
: : "a" (&S390_lowcore.access_regs_save_area));
- if (!mci->ar) {
+ if (!mci.ar) {
/*
* Access registers have unknown contents.
* Terminating task.
*/
kill_task = 1;
}
- /* Revalidate control registers */
- if (!mci->cr) {
+ /* Validate control registers */
+ if (!mci.cr) {
/*
* Control registers have unknown contents.
* Can't recover and therefore stopping machine.
*/
- s390_handle_damage("invalid control registers.");
+ s390_handle_damage();
} else {
asm volatile(
" lctlg 0,15,0(%0)"
: : "a" (&S390_lowcore.cregs_save_area));
}
/*
- * We don't even try to revalidate the TOD register, since we simply
+ * We don't even try to validate the TOD register, since we simply
* can't write something sensible into that register.
*/
/*
- * See if we can revalidate the TOD programmable register with its
+ * See if we can validate the TOD programmable register with its
* old contents (should be zero) otherwise set it to zero.
*/
- if (!mci->pr)
+ if (!mci.pr)
asm volatile(
" sr 0,0\n"
" sckpf"
" sckpf"
: : "a" (&S390_lowcore.tod_progreg_save_area)
: "0", "cc");
- /* Revalidate clock comparator register */
+ /* Validate clock comparator register */
set_clock_comparator(S390_lowcore.clock_comparator);
/* Check if old PSW is valid */
- if (!mci->wp)
+ if (!mci.wp)
/*
* Can't tell if we come from user or kernel mode
* -> stopping machine.
*/
- s390_handle_damage("old psw invalid.");
+ s390_handle_damage();
- if (!mci->ms || !mci->pm || !mci->ia)
+ if (!mci.ms || !mci.pm || !mci.ia)
kill_task = 1;
return kill_task;
static unsigned long long last_ipd;
struct mcck_struct *mcck;
unsigned long long tmp;
- struct mci *mci;
+ union mci mci;
int umode;
nmi_enter();
inc_irq_stat(NMI_NMI);
- mci = (struct mci *) &S390_lowcore.mcck_interruption_code;
+ mci.val = S390_lowcore.mcck_interruption_code;
mcck = this_cpu_ptr(&cpu_mcck);
umode = user_mode(regs);
- if (mci->sd) {
+ if (mci.sd) {
/* System damage -> stopping machine */
- s390_handle_damage("received system damage machine check.");
+ s390_handle_damage();
}
- if (mci->pd) {
- if (mci->b) {
+ if (mci.pd) {
+ if (mci.b) {
/* Processing backup -> verify if we can survive this */
u64 z_mcic, o_mcic, t_mcic;
z_mcic = (1ULL<<63 | 1ULL<<59 | 1ULL<<29);
1ULL<<36 | 1ULL<<35 | 1ULL<<34 | 1ULL<<32 |
1ULL<<30 | 1ULL<<21 | 1ULL<<20 | 1ULL<<17 |
1ULL<<16);
- t_mcic = *(u64 *)mci;
+ t_mcic = mci.val;
if (((t_mcic & z_mcic) != 0) ||
((t_mcic & o_mcic) != o_mcic)) {
- s390_handle_damage("processing backup machine "
- "check with damage.");
+ s390_handle_damage();
}
/*
ipd_count = 1;
last_ipd = tmp;
if (ipd_count == MAX_IPD_COUNT)
- s390_handle_damage("too many ipd retries.");
+ s390_handle_damage();
spin_unlock(&ipd_lock);
} else {
/* Processing damage -> stopping machine */
- s390_handle_damage("received instruction processing "
- "damage machine check.");
+ s390_handle_damage();
}
}
- if (s390_revalidate_registers(mci)) {
+ if (s390_validate_registers(mci)) {
if (umode) {
/*
* Couldn't restore all register contents while in
* user mode -> mark task for termination.
*/
mcck->kill_task = 1;
- mcck->mcck_code = *(unsigned long long *) mci;
+ mcck->mcck_code = mci.val;
set_cpu_flag(CIF_MCCK_PENDING);
} else {
/*
* Couldn't restore all register contents while in
* kernel mode -> stopping machine.
*/
- s390_handle_damage("unable to revalidate registers.");
+ s390_handle_damage();
}
}
- if (mci->cd) {
+ if (mci.cd) {
/* Timing facility damage */
- s390_handle_damage("TOD clock damaged");
+ s390_handle_damage();
}
- if (mci->ed && mci->ec) {
+ if (mci.ed && mci.ec) {
/* External damage */
if (S390_lowcore.external_damage_code & (1U << ED_ETR_SYNC))
- etr_sync_check();
+ mcck->etr_queue |= etr_sync_check();
if (S390_lowcore.external_damage_code & (1U << ED_ETR_SWITCH))
- etr_switch_to_local();
+ mcck->etr_queue |= etr_switch_to_local();
if (S390_lowcore.external_damage_code & (1U << ED_STP_SYNC))
- stp_sync_check();
+ mcck->stp_queue |= stp_sync_check();
if (S390_lowcore.external_damage_code & (1U << ED_STP_ISLAND))
- stp_island_check();
+ mcck->stp_queue |= stp_island_check();
+ if (mcck->etr_queue || mcck->stp_queue)
+ set_cpu_flag(CIF_MCCK_PENDING);
}
- if (mci->se)
+ if (mci.se)
/* Storage error uncorrected */
- s390_handle_damage("received storage error uncorrected "
- "machine check.");
- if (mci->ke)
+ s390_handle_damage();
+ if (mci.ke)
/* Storage key-error uncorrected */
- s390_handle_damage("received storage key-error uncorrected "
- "machine check.");
- if (mci->ds && mci->fa)
+ s390_handle_damage();
+ if (mci.ds && mci.fa)
/* Storage degradation */
- s390_handle_damage("received storage degradation machine "
- "check.");
- if (mci->cp) {
+ s390_handle_damage();
+ if (mci.cp) {
/* Channel report word pending */
mcck->channel_report = 1;
set_cpu_flag(CIF_MCCK_PENDING);
}
- if (mci->w) {
+ if (mci.w) {
/* Warning pending */
mcck->warning = 1;
set_cpu_flag(CIF_MCCK_PENDING);
ctl_set_bit(14, 24); /* enable warning MCH */
return 0;
}
-arch_initcall(machine_check_init);
+early_initcall(machine_check_init);
Code Review / kvmfornfv.git / blobdiff