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s390x: pv: Fix diag318 PV fencing 

Diag318 fencing needs to be determined on the current VM PV state and
not on the state that the VM has when we create the CPU model.

Fixes: fabdada935 ("s390: guest support for diagnose 0x318")
Reported-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Tested-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Collin Walling <walling@linux.ibm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Message-Id: <20201022103135.126033-3-frankja@linux.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
Janosch Frank 2020-10-22 06:31:35 -04:00 committed by Cornelia Huck
parent 3df4843d0e
commit 3ded270a26
4 changed files with 14 additions and 2 deletions
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5
target/s390x/cpu_features.c
View File

@ -14,6 +14,7 @@
#include "qemu/osdep.h"
#include "qemu/module.h"
#include "cpu_features.h"
#include "hw/s390x/pv.h"
#define DEF_FEAT(_FEAT, _NAME, _TYPE, _BIT, _DESC) \
[S390_FEAT_##_FEAT] = { \
@ -105,6 +106,10 @@ void s390_fill_feat_block(const S390FeatBitmap features, S390FeatType type,
}
feat = find_next_bit(features, S390_FEAT_MAX, feat + 1);
}
if (type == S390_FEAT_TYPE_SCLP_FAC134 && s390_is_pv()) {
clear_be_bit(s390_feat_def(S390_FEAT_DIAG_318)->bit, data);
}
}
void s390_add_from_feat_block(S390FeatBitmap features, S390FeatType type,

4
target/s390x/cpu_features.h
View File

@ -81,6 +81,10 @@ const S390FeatGroupDef *s390_feat_group_def(S390FeatGroup group);
#define BE_BIT_NR(BIT) (BIT ^ (BITS_PER_LONG - 1))
static inline void clear_be_bit(unsigned int bit_nr, uint8_t *array)
{
array[bit_nr / 8] &= ~(0x80 >> (bit_nr % 8));
}
static inline void set_be_bit(unsigned int bit_nr, uint8_t *array)
{
array[bit_nr / 8] |= 0x80 >> (bit_nr % 8);

4
target/s390x/cpu_models.c
View File

@ -29,6 +29,7 @@
#include "hw/pci/pci.h"
#endif
#include "qapi/qapi-commands-machine-target.h"
#include "hw/s390x/pv.h"
#define CPUDEF_INIT(_type, _gen, _ec_ga, _mha_pow, _hmfai, _name, _desc) \
{ \
@ -238,6 +239,9 @@ bool s390_has_feat(S390Feat feat)
}
return 0;
}
if (feat == S390_FEAT_DIAG_318 && s390_is_pv()) {
return false;
}
return test_bit(feat, cpu->model->features);
}

3
target/s390x/kvm.c
View File

@ -2498,8 +2498,7 @@ void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp)
*/
set_bit(S390_FEAT_EXTENDED_LENGTH_SCCB, model->features);
/* DIAGNOSE 0x318 is not supported under protected virtualization */
if (!s390_is_pv() && kvm_check_extension(kvm_state, KVM_CAP_S390_DIAG318)) {
if (kvm_check_extension(kvm_state, KVM_CAP_S390_DIAG318)) {
set_bit(S390_FEAT_DIAG_318, model->features);
}