diff options
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/kvm_host.h | 2 | ||||
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 49 |
2 files changed, 49 insertions, 2 deletions
diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h index f79058e3fd98..77ae01444e98 100644 --- a/arch/s390/include/asm/kvm_host.h +++ b/arch/s390/include/asm/kvm_host.h @@ -163,6 +163,7 @@ struct kvm_s390_sie_block { __u64 tecmc; /* 0x00e8 */ __u8 reservedf0[12]; /* 0x00f0 */ #define CRYCB_FORMAT1 0x00000001 +#define CRYCB_FORMAT2 0x00000003 __u32 crycbd; /* 0x00fc */ __u64 gcr[16]; /* 0x0100 */ __u64 gbea; /* 0x0180 */ @@ -516,6 +517,7 @@ struct kvm_s390_crypto_cb { __u8 reserved00[72]; /* 0x0000 */ __u8 dea_wrapping_key_mask[24]; /* 0x0048 */ __u8 aes_wrapping_key_mask[32]; /* 0x0060 */ + __u8 reserved80[128]; /* 0x0080 */ }; struct kvm_arch{ diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 3acf08ba88e4..deac47378f77 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -654,6 +654,52 @@ long kvm_arch_vm_ioctl(struct file *filp, return r; } +static int kvm_s390_query_ap_config(u8 *config) +{ + u32 fcn_code = 0x04000000UL; + u32 cc; + + asm volatile( + "lgr 0,%1\n" + "lgr 2,%2\n" + ".long 0xb2af0000\n" /* PQAP(QCI) */ + "ipm %0\n" + "srl %0,28\n" + : "=r" (cc) + : "r" (fcn_code), "r" (config) + : "cc", "0", "2", "memory" + ); + + return cc; +} + +static int kvm_s390_apxa_installed(void) +{ + u8 config[128]; + int cc; + + if (test_facility(2) && test_facility(12)) { + cc = kvm_s390_query_ap_config(config); + + if (cc) + pr_err("PQAP(QCI) failed with cc=%d", cc); + else + return config[0] & 0x40; + } + + return 0; +} + +static void kvm_s390_set_crycb_format(struct kvm *kvm) +{ + kvm->arch.crypto.crycbd = (__u32)(unsigned long) kvm->arch.crypto.crycb; + + if (kvm_s390_apxa_installed()) + kvm->arch.crypto.crycbd |= CRYCB_FORMAT2; + else + kvm->arch.crypto.crycbd |= CRYCB_FORMAT1; +} + static int kvm_s390_crypto_init(struct kvm *kvm) { if (!test_vfacility(76)) @@ -664,8 +710,7 @@ static int kvm_s390_crypto_init(struct kvm *kvm) if (!kvm->arch.crypto.crycb) return -ENOMEM; - kvm->arch.crypto.crycbd = (__u32) (unsigned long) kvm->arch.crypto.crycb | - CRYCB_FORMAT1; + kvm_s390_set_crycb_format(kvm); /* Disable AES/DEA protected key functions by default */ kvm->arch.crypto.aes_kw = 0; |