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s390x/cpu: Tolerate max_cpus

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Once hotplug is enabled, interrupts may come in for CPUs
with an address > smp_cpus.  Allocate for this and allow
search routines to look beyond smp_cpus.

Signed-off-by: Matthew Rosato <mjrosato@linux.vnet.ibm.com>
Message-Id: <1457112875-5209-5-git-send-email-mjrosato@linux.vnet.ibm.com>
Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
This commit is contained in:
Matthew Rosato 2016-03-04 12:34:32 -05:00 • committed by Cornelia Huck
parent c6644fc88b
commit 25637d31f2
1 changed files with 6 additions and 5 deletions
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11
hw/s390x/s390-virtio.c
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@ -58,15 +58,16 @@
#define S390_TOD_CLOCK_VALUE_MISSING 0x00 #define S390_TOD_CLOCK_VALUE_MISSING 0x00
#define S390_TOD_CLOCK_VALUE_PRESENT 0x01 #define S390_TOD_CLOCK_VALUE_PRESENT 0x01
static S390CPU **ipi_states; static S390CPU **cpu_states;
S390CPU *s390_cpu_addr2state(uint16_t cpu_addr) S390CPU *s390_cpu_addr2state(uint16_t cpu_addr)
{ {
if (cpu_addr >= smp_cpus) { if (cpu_addr >= max_cpus) {
return NULL; return NULL;
} }
return ipi_states[cpu_addr]; /* Fast lookup via CPU ID */
return cpu_states[cpu_addr];
} }
void s390_init_ipl_dev(const char *kernel_filename, void s390_init_ipl_dev(const char *kernel_filename,
@ -101,14 +102,14 @@ void s390_init_cpus(MachineState *machine)
machine->cpu_model = "host"; machine->cpu_model = "host";
} }
ipi_states = g_malloc(sizeof(S390CPU *) * smp_cpus); cpu_states = g_malloc0(sizeof(S390CPU *) * max_cpus);
for (i = 0; i < smp_cpus; i++) { for (i = 0; i < smp_cpus; i++) {
S390CPU *cpu; S390CPU *cpu;
cpu = cpu_s390x_init(machine->cpu_model); cpu = cpu_s390x_init(machine->cpu_model);
ipi_states[i] = cpu; cpu_states[i] = cpu;
} }
} }