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s390x: remember the maximum page size

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Let's remember the value (successfully) set via s390_set_max_pagesize().
This will be helpful to reject hotplugged memory devices that would exceed
this initially set page size.

Handle it just like how we handle s390_get_memory_limit(), storing it in
the machine, and moving the handling to machine code.

Message-ID: <20241219144115.2820241-13-david@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
This commit is contained in:
David Hildenbrand 2024-12-19 15:41:13 +01:00
parent a056332e73
commit df2ac211a6
4 changed files with 12 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

12
hw/s390x/s390-virtio-ccw.c
View file

@ -143,6 +143,16 @@ static void s390_set_memory_limit(S390CcwMachineState *s390ms,
s390ms->memory_limit = new_limit;
}
static void s390_set_max_pagesize(S390CcwMachineState *s390ms,
uint64_t pagesize)
{
assert(!s390ms->max_pagesize && pagesize);
if (kvm_enabled()) {
kvm_s390_set_max_pagesize(pagesize, &error_fatal);
}
s390ms->max_pagesize = pagesize;
}
static void s390_memory_init(MachineState *machine)
{
S390CcwMachineState *s390ms = S390_CCW_MACHINE(machine);
@ -191,7 +201,7 @@ static void s390_memory_init(MachineState *machine)
* Configure the maximum page size. As no memory devices were created
* yet, this is the page size of initial memory only.
*/
s390_set_max_pagesize(qemu_maxrampagesize(), &error_fatal);
s390_set_max_pagesize(s390ms, qemu_maxrampagesize());
/* Initialize storage key device */
s390_skeys_init();
/* Initialize storage attributes device */

1
include/hw/s390x/s390-virtio-ccw.h
View file

@ -30,6 +30,7 @@ struct S390CcwMachineState {
bool pv;
uint8_t loadparm[8];
uint64_t memory_limit;
uint64_t max_pagesize;
SCLPDevice *sclp;
};

7
target/s390x/cpu-sysemu.c
View file

@ -255,13 +255,6 @@ unsigned int s390_cpu_set_state(uint8_t cpu_state, S390CPU *cpu)
return s390_count_running_cpus();
}
void s390_set_max_pagesize(uint64_t pagesize, Error **errp)
{
if (kvm_enabled()) {
kvm_s390_set_max_pagesize(pagesize, errp);
}
}
void s390_cmma_reset(void)
{
if (kvm_enabled()) {

1
target/s390x/cpu.h
View file

@ -881,7 +881,6 @@ static inline void s390_do_cpu_load_normal(CPUState *cs, run_on_cpu_data arg)
/* cpu.c */
void s390_crypto_reset(void);
void s390_set_max_pagesize(uint64_t pagesize, Error **errp);
void s390_cmma_reset(void);
void s390_enable_css_support(S390CPU *cpu);
void s390_do_cpu_set_diag318(CPUState *cs, run_on_cpu_data arg);