From 53df84f8de312586e1c05a8f496f614ca814eeff Mon Sep 17 00:00:00 2001 From: Guenther Hutzl Date: Wed, 18 Feb 2015 11:13:03 +0100 Subject: [PATCH] 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 Reviewed-by: Cornelia Huck Reviewed-by: Christian Borntraeger Signed-off-by: Guenther Hutzl Signed-off-by: Christian Borntraeger --- arch/s390/include/asm/kvm_host.h | 1 + arch/s390/kvm/kvm-s390.c | 6 ++++-- arch/s390/kvm/priv.c | 8 ++++++-- 3 files changed, 11 insertions(+), 4 deletions(-) diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index d01fc588b5c3..1011ac1434f5 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -80,6 +80,7 @@ struct sca_block { #define CPUSTAT_MCDS 0x00000100 #define CPUSTAT_SM 0x00000080 #define CPUSTAT_IBS 0x00000040 +#define CPUSTAT_GED2 0x00000010 #define CPUSTAT_G 0x00000008 #define CPUSTAT_GED 0x00000004 #define CPUSTAT_J 0x00000002 diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 2da36c432aea..142d9b40528d 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -110,7 +110,7 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { /* upper facilities limit for kvm */ unsigned long kvm_s390_fac_list_mask[] = { 0xffe6fffbfcfdfc40UL, - 0x005c800000000000UL, + 0x005e800000000000UL, }; 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_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); kvm_s390_vcpu_setup_model(vcpu); diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c index d22d8ee1ff9d..ad4242245771 100644 --- a/arch/s390/kvm/priv.c +++ b/arch/s390/kvm/priv.c @@ -698,10 +698,14 @@ static int handle_pfmf(struct kvm_vcpu *vcpu) case 0x00001000: end = (start + (1UL << 20)) & ~((1UL << 20) - 1); break; - /* We dont support EDAT2 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); - break;*/ + break; default: return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); } -- 2.34.1