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- fix cpu number reporting in the stsi 3.2.2 block for kvm

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- fix migration for old machines with odd ram sizes
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Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20200403' into staging

- fix cpu number reporting in the stsi 3.2.2 block for kvm
- fix migration for old machines with odd ram sizes

# gpg: Signature made Fri 03 Apr 2020 10:11:06 BST
# gpg:                using RSA key C3D0D66DC3624FF6A8C018CEDECF6B93C6F02FAF
# gpg:                issuer "cohuck@redhat.com"
# gpg: Good signature from "Cornelia Huck <conny@cornelia-huck.de>" [marginal]
# gpg:                 aka "Cornelia Huck <huckc@linux.vnet.ibm.com>" [full]
# gpg:                 aka "Cornelia Huck <cornelia.huck@de.ibm.com>" [full]
# gpg:                 aka "Cornelia Huck <cohuck@kernel.org>" [marginal]
# gpg:                 aka "Cornelia Huck <cohuck@redhat.com>" [marginal]
# Primary key fingerprint: C3D0 D66D C362 4FF6 A8C0  18CE DECF 6B93 C6F0 2FAF

* remotes/cohuck/tags/s390x-20200403:
  vl/s390x: fixup ram sizes for compat machines
  s390x: kvm: Fix number of cpu reports for stsi 3.2.2

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2020-04-03 12:59:29 +01:00
commit 64a3b4d53d
7 changed files with 56 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
hw/s390x/s390-skeys.c
View File

@ -176,7 +176,7 @@ static void qemu_s390_skeys_init(Object *obj)
QEMUS390SKeysState *skeys = QEMU_S390_SKEYS(obj);
MachineState *machine = MACHINE(qdev_get_machine());
skeys->key_count = machine->maxram_size / TARGET_PAGE_SIZE;
skeys->key_count = machine->ram_size / TARGET_PAGE_SIZE;
skeys->keydata = g_malloc0(skeys->key_count);
}

4
hw/s390x/s390-stattrib-kvm.c
View File

@ -85,7 +85,7 @@ static int kvm_s390_stattrib_set_stattr(S390StAttribState *sa,
{
KVMS390StAttribState *sas = KVM_S390_STATTRIB(sa);
MachineState *machine = MACHINE(qdev_get_machine());
unsigned long max = machine->maxram_size / TARGET_PAGE_SIZE;
unsigned long max = machine->ram_size / TARGET_PAGE_SIZE;
if (start_gfn + count > max) {
error_report("Out of memory bounds when setting storage attributes");
@ -104,7 +104,7 @@ static void kvm_s390_stattrib_synchronize(S390StAttribState *sa)
{
KVMS390StAttribState *sas = KVM_S390_STATTRIB(sa);
MachineState *machine = MACHINE(qdev_get_machine());
unsigned long max = machine->maxram_size / TARGET_PAGE_SIZE;
unsigned long max = machine->ram_size / TARGET_PAGE_SIZE;
/* We do not need to reach the maximum buffer size allowed */
unsigned long cx, len = KVM_S390_SKEYS_MAX / 2;
int r;

22
hw/s390x/s390-virtio-ccw.c
View File

@ -26,6 +26,7 @@
#include "qemu/ctype.h"
#include "qemu/error-report.h"
#include "qemu/option.h"
#include "qemu/qemu-print.h"
#include "s390-pci-bus.h"
#include "sysemu/reset.h"
#include "hw/s390x/storage-keys.h"
@ -439,6 +440,26 @@ static void s390_nmi(NMIState *n, int cpu_index, Error **errp)
s390_cpu_restart(S390_CPU(cs));
}
static ram_addr_t s390_fixup_ram_size(ram_addr_t sz)
{
/* same logic as in sclp.c */
int increment_size = 20;
ram_addr_t newsz;
while ((sz >> increment_size) > MAX_STORAGE_INCREMENTS) {
increment_size++;
}
newsz = sz >> increment_size << increment_size;
if (sz != newsz) {
qemu_printf("Ram size %" PRIu64 "MB was fixed up to %" PRIu64
"MB to match machine restrictions. Consider updating "
"the guest definition.\n", (uint64_t) (sz / MiB),
(uint64_t) (newsz / MiB));
}
return newsz;
}
static void ccw_machine_class_init(ObjectClass *oc, void *data)
{
MachineClass *mc = MACHINE_CLASS(oc);
@ -668,6 +689,7 @@ static void ccw_machine_4_2_instance_options(MachineState *machine)
static void ccw_machine_4_2_class_options(MachineClass *mc)
{
ccw_machine_5_0_class_options(mc);
mc->fixup_ram_size = s390_fixup_ram_size;
compat_props_add(mc->compat_props, hw_compat_4_2, hw_compat_4_2_len);
}
DEFINE_CCW_MACHINE(4_2, "4.2", false);

17
hw/s390x/sclp.c
View File

@ -327,27 +327,20 @@ out:
static void sclp_memory_init(SCLPDevice *sclp)
{
MachineState *machine = MACHINE(qdev_get_machine());
MachineClass *machine_class = MACHINE_GET_CLASS(qdev_get_machine());
ram_addr_t initial_mem = machine->ram_size;
int increment_size = 20;
/* The storage increment size is a multiple of 1M and is a power of 2.
* The number of storage increments must be MAX_STORAGE_INCREMENTS or fewer.
* For some machine types, the number of storage increments must be
* MAX_STORAGE_INCREMENTS or fewer.
* The variable 'increment_size' is an exponent of 2 that can be
* used to calculate the size (in bytes) of an increment. */
while ((initial_mem >> increment_size) > MAX_STORAGE_INCREMENTS) {
while (machine_class->fixup_ram_size != NULL &&
(initial_mem >> increment_size) > MAX_STORAGE_INCREMENTS) {
increment_size++;
}
sclp->increment_size = increment_size;
/* The core memory area needs to be aligned with the increment size.
* In effect, this can cause the user-specified memory size to be rounded
* down to align with the nearest increment boundary. */
initial_mem = initial_mem >> increment_size << increment_size;
machine->ram_size = initial_mem;
machine->maxram_size = initial_mem;
/* let's propagate the changed ram size into the global variable. */
ram_size = initial_mem;
}
static void sclp_init(Object *obj)

7
include/hw/boards.h
View File

@ -152,6 +152,12 @@ typedef struct {
* It also will be used as a way to optin into "-m" option support.
* If it's not set by board, '-m' will be ignored and generic code will
* not create default RAM MemoryRegion.
* @fixup_ram_size:
* Amends user provided ram size (with -m option) using machine
* specific algorithm. To be used by old machine types for compat
* purposes only.
* Applies only to default memory backend, i.e., explicit memory backend
* wasn't used.
*/
struct MachineClass {
/*< private >*/
@ -218,6 +224,7 @@ struct MachineClass {
unsigned cpu_index);
const CPUArchIdList *(*possible_cpu_arch_ids)(MachineState *machine);
int64_t (*get_default_cpu_node_id)(const MachineState *ms, int idx);
ram_addr_t (*fixup_ram_size)(ram_addr_t size);
};
/**

3
softmmu/vl.c
View File

@ -2600,6 +2600,9 @@ static bool set_memory_options(uint64_t *ram_slots, ram_addr_t *maxram_size,
}
sz = QEMU_ALIGN_UP(sz, 8192);
if (mc->fixup_ram_size) {
sz = mc->fixup_ram_size(sz);
}
ram_size = sz;
if (ram_size != sz) {
error_report("ram size too large");

17
target/s390x/kvm.c
View File

@ -1768,8 +1768,10 @@ static int handle_tsch(S390CPU *cpu)
static void insert_stsi_3_2_2(S390CPU *cpu, __u64 addr, uint8_t ar)
{
const MachineState *ms = MACHINE(qdev_get_machine());
uint16_t conf_cpus = 0, reserved_cpus = 0;
SysIB_322 sysib;
int del;
int del, i;
if (s390_cpu_virt_mem_read(cpu, addr, ar, &sysib, sizeof(sysib))) {
return;
@ -1789,6 +1791,19 @@ static void insert_stsi_3_2_2(S390CPU *cpu, __u64 addr, uint8_t ar)
memset(sysib.ext_names[del], 0,
sizeof(sysib.ext_names[0]) * (sysib.count - del));
}
/* count the cpus and split them into configured and reserved ones */
for (i = 0; i < ms->possible_cpus->len; i++) {
if (ms->possible_cpus->cpus[i].cpu) {
conf_cpus++;
} else {
reserved_cpus++;
}
}
sysib.vm[0].total_cpus = conf_cpus + reserved_cpus;
sysib.vm[0].conf_cpus = conf_cpus;
sysib.vm[0].reserved_cpus = reserved_cpus;
/* Insert short machine name in EBCDIC, padded with blanks */
if (qemu_name) {
memset(sysib.vm[0].name, 0x40, sizeof(sysib.vm[0].name));