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KVM: s390: Enable guest EDAT2 support 

1. Enable EDAT2 in the list of KVM facilities

2. Handle 2G frames in pfmf instruction
If we support EDAT2, we may enable handling of 2G frames if not in 24
bit mode.

3. Enable EDAT2 in sie_block
If the EDAT2 facility is available we enable GED2 mode control in the
sie_block.

Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Guenther Hutzl <hutzl@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Guenther Hutzl 2015-02-18 11:13:03 +01:00 committed by Christian Borntraeger
parent a4a4f1916a
commit 53df84f8de
3 changed files with 11 additions and 4 deletions
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1
arch/s390/include/asm/kvm_host.h
View File

@ -80,6 +80,7 @@ struct sca_block {
#define CPUSTAT_MCDS 0x00000100 #define CPUSTAT_MCDS 0x00000100
#define CPUSTAT_SM 0x00000080 #define CPUSTAT_SM 0x00000080
#define CPUSTAT_IBS 0x00000040 #define CPUSTAT_IBS 0x00000040
#define CPUSTAT_GED2 0x00000010
#define CPUSTAT_G 0x00000008 #define CPUSTAT_G 0x00000008
#define CPUSTAT_GED 0x00000004 #define CPUSTAT_GED 0x00000004
#define CPUSTAT_J 0x00000002 #define CPUSTAT_J 0x00000002

6
arch/s390/kvm/kvm-s390.c
View File

@ -110,7 +110,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = {
/* upper facilities limit for kvm */ /* upper facilities limit for kvm */
unsigned long kvm_s390_fac_list_mask[] = { unsigned long kvm_s390_fac_list_mask[] = {
0xffe6fffbfcfdfc40UL, 0xffe6fffbfcfdfc40UL,
0x005c800000000000UL, 0x005e800000000000UL,
}; };
unsigned long kvm_s390_fac_list_mask_size(void) unsigned long kvm_s390_fac_list_mask_size(void)
@ -1313,7 +1313,9 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
CPUSTAT_SM | CPUSTAT_SM |
CPUSTAT_STOPPED); CPUSTAT_STOPPED);
if (test_kvm_facility(vcpu->kvm, 8)) if (test_kvm_facility(vcpu->kvm, 78))
atomic_set_mask(CPUSTAT_GED2, &vcpu->arch.sie_block->cpuflags);
else if (test_kvm_facility(vcpu->kvm, 8))
atomic_set_mask(CPUSTAT_GED, &vcpu->arch.sie_block->cpuflags); atomic_set_mask(CPUSTAT_GED, &vcpu->arch.sie_block->cpuflags);
kvm_s390_vcpu_setup_model(vcpu); kvm_s390_vcpu_setup_model(vcpu);

8
arch/s390/kvm/priv.c
View File

@ -698,10 +698,14 @@ static int handle_pfmf(struct kvm_vcpu *vcpu)
case 0x00001000: case 0x00001000:
end = (start + (1UL << 20)) & ~((1UL << 20) - 1); end = (start + (1UL << 20)) & ~((1UL << 20) - 1);
break; break;
/* We dont support EDAT2
case 0x00002000: case 0x00002000:
/* only support 2G frame size if EDAT2 is available and we are
not in 24-bit addressing mode */
if (!test_kvm_facility(vcpu->kvm, 78) ||
psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_AMODE_24BIT)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
end = (start + (1UL << 31)) & ~((1UL << 31) - 1); end = (start + (1UL << 31)) & ~((1UL << 31) - 1);
break;*/ break;
default: default:
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
} }