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s390x/cpumodel: provide compat handling for new cpu features 

Provide a mechanism to disable features in compatibility machines.

Signed-off-by: Jason J. Herne <jjherne@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Jason J. Herne 2017-04-10 09:39:00 -04:00 committed by Christian Borntraeger
parent ec3aadb13e
commit c9ad8a7a53
2 changed files with 28 additions and 0 deletions
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26
target/s390x/cpu_models.c
View File

@ -77,6 +77,32 @@ static S390CPUDef s390_cpu_defs[] = {
CPUDEF_INIT(0x2965, 13, 2, 47, 0x08000000U, "z13s", "IBM z13s GA1"),
};
void s390_cpudef_featoff(uint8_t gen, uint8_t ec_ga, S390Feat feat)
{
const S390CPUDef *def;
def = s390_find_cpu_def(0, gen, ec_ga, NULL);
clear_bit(feat, (unsigned long *)&def->default_feat);
}
void s390_cpudef_featoff_greater(uint8_t gen, uint8_t ec_ga, S390Feat feat)
{
int i;
for (i = 0; i < ARRAY_SIZE(s390_cpu_defs); i++) {
const S390CPUDef *def = &s390_cpu_defs[i];
if (def->gen < gen) {
continue;
}
if (def->gen == gen && def->ec_ga < ec_ga) {
continue;
}
clear_bit(feat, (unsigned long *)&def->default_feat);
}
}
uint32_t s390_get_hmfai(void)
{
static S390CPU *cpu;

2
target/s390x/cpu_models.h
View File

@ -72,6 +72,8 @@ typedef struct S390CPUModel {
#define ibc_gen(x) (x == 0 ? 0 : ((x >> 4) + S390_GEN_Z10))
#define ibc_ec_ga(x) (x & 0xf)
void s390_cpudef_featoff(uint8_t gen, uint8_t ec_ga, S390Feat feat);
void s390_cpudef_featoff_greater(uint8_t gen, uint8_t ec_ga, S390Feat feat);
uint32_t s390_get_hmfai(void);
uint8_t s390_get_mha_pow(void);
uint32_t s390_get_ibc_val(void);