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Diffstat (limited to 'arch/s390/kvm')
-rw-r--r--arch/s390/kvm/intercept.c1
-rw-r--r--arch/s390/kvm/interrupt.c33
-rw-r--r--arch/s390/kvm/kvm-s390.c62
-rw-r--r--arch/s390/kvm/kvm-s390.h1
-rw-r--r--arch/s390/kvm/priv.c27
-rw-r--r--arch/s390/kvm/vsie.c39
6 files changed, 161 insertions, 2 deletions
diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c
index e831f4b3e1c1..f5378f336127 100644
--- a/arch/s390/kvm/intercept.c
+++ b/arch/s390/kvm/intercept.c
@@ -35,6 +35,7 @@ static const intercept_handler_t instruction_handlers[256] = {
[0xb6] = kvm_s390_handle_stctl,
[0xb7] = kvm_s390_handle_lctl,
[0xb9] = kvm_s390_handle_b9,
+ [0xe3] = kvm_s390_handle_e3,
[0xe5] = kvm_s390_handle_e5,
[0xeb] = kvm_s390_handle_eb,
};
diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index 169558dc7daf..311eef0df855 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -410,6 +410,7 @@ static int __write_machine_check(struct kvm_vcpu *vcpu,
struct kvm_s390_mchk_info *mchk)
{
unsigned long ext_sa_addr;
+ unsigned long lc;
freg_t fprs[NUM_FPRS];
union mci mci;
int rc;
@@ -422,8 +423,28 @@ static int __write_machine_check(struct kvm_vcpu *vcpu,
/* Extended save area */
rc = read_guest_lc(vcpu, __LC_MCESAD, &ext_sa_addr,
sizeof(unsigned long));
- /* Only bits 0-53 are used for address formation */
- ext_sa_addr &= ~0x3ffUL;
+ /* Only bits 0 through 63-LC are used for address formation */
+ lc = ext_sa_addr & MCESA_LC_MASK;
+ if (test_kvm_facility(vcpu->kvm, 133)) {
+ switch (lc) {
+ case 0:
+ case 10:
+ ext_sa_addr &= ~0x3ffUL;
+ break;
+ case 11:
+ ext_sa_addr &= ~0x7ffUL;
+ break;
+ case 12:
+ ext_sa_addr &= ~0xfffUL;
+ break;
+ default:
+ ext_sa_addr = 0;
+ break;
+ }
+ } else {
+ ext_sa_addr &= ~0x3ffUL;
+ }
+
if (!rc && mci.vr && ext_sa_addr && test_kvm_facility(vcpu->kvm, 129)) {
if (write_guest_abs(vcpu, ext_sa_addr, vcpu->run->s.regs.vrs,
512))
@@ -431,6 +452,14 @@ static int __write_machine_check(struct kvm_vcpu *vcpu,
} else {
mci.vr = 0;
}
+ if (!rc && mci.gs && ext_sa_addr && test_kvm_facility(vcpu->kvm, 133)
+ && (lc == 11 || lc == 12)) {
+ if (write_guest_abs(vcpu, ext_sa_addr + 1024,
+ &vcpu->run->s.regs.gscb, 32))
+ mci.gs = 0;
+ } else {
+ mci.gs = 0;
+ }
/* General interruption information */
rc |= put_guest_lc(vcpu, 1, (u8 __user *) __LC_AR_MODE_ID);
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 976373c03138..f83f18b77f3d 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -405,6 +405,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_S390_RI:
r = test_facility(64);
break;
+ case KVM_CAP_S390_GS:
+ r = test_facility(133);
+ break;
default:
r = 0;
}
@@ -541,6 +544,20 @@ static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
VM_EVENT(kvm, 3, "ENABLE: CAP_S390_RI %s",
r ? "(not available)" : "(success)");
break;
+ case KVM_CAP_S390_GS:
+ r = -EINVAL;
+ mutex_lock(&kvm->lock);
+ if (atomic_read(&kvm->online_vcpus)) {
+ r = -EBUSY;
+ } else if (test_facility(133)) {
+ set_kvm_facility(kvm->arch.model.fac_mask, 133);
+ set_kvm_facility(kvm->arch.model.fac_list, 133);
+ r = 0;
+ }
+ mutex_unlock(&kvm->lock);
+ VM_EVENT(kvm, 3, "ENABLE: CAP_S390_GS %s",
+ r ? "(not available)" : "(success)");
+ break;
case KVM_CAP_S390_USER_STSI:
VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI");
kvm->arch.user_stsi = 1;
@@ -1749,6 +1766,8 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
kvm_s390_set_prefix(vcpu, 0);
if (test_kvm_facility(vcpu->kvm, 64))
vcpu->run->kvm_valid_regs |= KVM_SYNC_RICCB;
+ if (test_kvm_facility(vcpu->kvm, 133))
+ vcpu->run->kvm_valid_regs |= KVM_SYNC_GSCB;
/* fprs can be synchronized via vrs, even if the guest has no vx. With
* MACHINE_HAS_VX, (load|store)_fpu_regs() will work with vrs format.
*/
@@ -1993,6 +2012,8 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
vcpu->arch.sie_block->eca |= ECA_VX;
vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT;
}
+ vcpu->arch.sie_block->sdnxo = ((unsigned long) &vcpu->run->s.regs.sdnx)
+ | SDNXC;
vcpu->arch.sie_block->riccbd = (unsigned long) &vcpu->run->s.regs.riccb;
vcpu->arch.sie_block->ictl |= ICTL_ISKE | ICTL_SSKE | ICTL_RRBE;
@@ -2720,8 +2741,10 @@ static int __vcpu_run(struct kvm_vcpu *vcpu)
static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
struct runtime_instr_cb *riccb;
+ struct gs_cb *gscb;
riccb = (struct runtime_instr_cb *) &kvm_run->s.regs.riccb;
+ gscb = (struct gs_cb *) &kvm_run->s.regs.gscb;
vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask;
vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr;
if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX)
@@ -2756,6 +2779,19 @@ static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
VCPU_EVENT(vcpu, 3, "%s", "ENABLE: RI (sync_regs)");
vcpu->arch.sie_block->ecb3 |= ECB3_RI;
}
+ /*
+ * If userspace sets the gscb (e.g. after migration) to non-zero,
+ * we should enable GS here instead of doing the lazy enablement.
+ */
+ if ((kvm_run->kvm_dirty_regs & KVM_SYNC_GSCB) &&
+ test_kvm_facility(vcpu->kvm, 133) &&
+ gscb->gssm &&
+ !vcpu->arch.gs_enabled) {
+ VCPU_EVENT(vcpu, 3, "%s", "ENABLE: GS (sync_regs)");
+ vcpu->arch.sie_block->ecb |= ECB_GS;
+ vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT;
+ vcpu->arch.gs_enabled = 1;
+ }
save_access_regs(vcpu->arch.host_acrs);
restore_access_regs(vcpu->run->s.regs.acrs);
/* save host (userspace) fprs/vrs */
@@ -2770,6 +2806,20 @@ static void sync_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
if (test_fp_ctl(current->thread.fpu.fpc))
/* User space provided an invalid FPC, let's clear it */
current->thread.fpu.fpc = 0;
+ if (MACHINE_HAS_GS) {
+ preempt_disable();
+ __ctl_set_bit(2, 4);
+ if (current->thread.gs_cb) {
+ vcpu->arch.host_gscb = current->thread.gs_cb;
+ save_gs_cb(vcpu->arch.host_gscb);
+ }
+ if (vcpu->arch.gs_enabled) {
+ current->thread.gs_cb = (struct gs_cb *)
+ &vcpu->run->s.regs.gscb;
+ restore_gs_cb(current->thread.gs_cb);
+ }
+ preempt_enable();
+ }
kvm_run->kvm_dirty_regs = 0;
}
@@ -2796,6 +2846,18 @@ static void store_regs(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
/* Restore will be done lazily at return */
current->thread.fpu.fpc = vcpu->arch.host_fpregs.fpc;
current->thread.fpu.regs = vcpu->arch.host_fpregs.regs;
+ if (MACHINE_HAS_GS) {
+ __ctl_set_bit(2, 4);
+ if (vcpu->arch.gs_enabled)
+ save_gs_cb(current->thread.gs_cb);
+ preempt_disable();
+ current->thread.gs_cb = vcpu->arch.host_gscb;
+ restore_gs_cb(vcpu->arch.host_gscb);
+ preempt_enable();
+ if (!vcpu->arch.host_gscb)
+ __ctl_clear_bit(2, 4);
+ vcpu->arch.host_gscb = NULL;
+ }
}
diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h
index dfdcde125af6..455124fe0647 100644
--- a/arch/s390/kvm/kvm-s390.h
+++ b/arch/s390/kvm/kvm-s390.h
@@ -246,6 +246,7 @@ static inline void kvm_s390_retry_instr(struct kvm_vcpu *vcpu)
int is_valid_psw(psw_t *psw);
int kvm_s390_handle_aa(struct kvm_vcpu *vcpu);
int kvm_s390_handle_b2(struct kvm_vcpu *vcpu);
+int kvm_s390_handle_e3(struct kvm_vcpu *vcpu);
int kvm_s390_handle_e5(struct kvm_vcpu *vcpu);
int kvm_s390_handle_01(struct kvm_vcpu *vcpu);
int kvm_s390_handle_b9(struct kvm_vcpu *vcpu);
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
index d42bb2d03041..0ffe973535fa 100644
--- a/arch/s390/kvm/priv.c
+++ b/arch/s390/kvm/priv.c
@@ -53,6 +53,33 @@ int kvm_s390_handle_aa(struct kvm_vcpu *vcpu)
return -EOPNOTSUPP;
}
+static int handle_gs(struct kvm_vcpu *vcpu)
+{
+ if (test_kvm_facility(vcpu->kvm, 133)) {
+ VCPU_EVENT(vcpu, 3, "%s", "ENABLE: GS (lazy)");
+ preempt_disable();
+ __ctl_set_bit(2, 4);
+ current->thread.gs_cb = (struct gs_cb *)&vcpu->run->s.regs.gscb;
+ restore_gs_cb(current->thread.gs_cb);
+ preempt_enable();
+ vcpu->arch.sie_block->ecb |= ECB_GS;
+ vcpu->arch.sie_block->ecd |= ECD_HOSTREGMGMT;
+ vcpu->arch.gs_enabled = 1;
+ kvm_s390_retry_instr(vcpu);
+ return 0;
+ } else
+ return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
+}
+
+int kvm_s390_handle_e3(struct kvm_vcpu *vcpu)
+{
+ int code = vcpu->arch.sie_block->ipb & 0xff;
+
+ if (code == 0x49 || code == 0x4d)
+ return handle_gs(vcpu);
+ else
+ return -EOPNOTSUPP;
+}
/* Handle SCK (SET CLOCK) interception */
static int handle_set_clock(struct kvm_vcpu *vcpu)
{
diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c
index d91f1df5a854..2fafc2be777f 100644
--- a/arch/s390/kvm/vsie.c
+++ b/arch/s390/kvm/vsie.c
@@ -329,6 +329,11 @@ static int shadow_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
/* Instruction Execution Prevention */
if (test_kvm_facility(vcpu->kvm, 130))
scb_s->ecb2 |= scb_o->ecb2 & ECB2_IEP;
+ /* Guarded Storage */
+ if (test_kvm_facility(vcpu->kvm, 133)) {
+ scb_s->ecb |= scb_o->ecb & ECB_GS;
+ scb_s->ecd |= scb_o->ecd & ECD_HOSTREGMGMT;
+ }
if (test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_SIIF))
scb_s->eca |= scb_o->eca & ECA_SII;
if (test_kvm_cpu_feat(vcpu->kvm, KVM_S390_VM_CPU_FEAT_IB))
@@ -496,6 +501,13 @@ static void unpin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
unpin_guest_page(vcpu->kvm, gpa, hpa);
scb_s->riccbd = 0;
}
+
+ hpa = scb_s->sdnxo;
+ if (hpa) {
+ gpa = scb_o->sdnxo;
+ unpin_guest_page(vcpu->kvm, gpa, hpa);
+ scb_s->sdnxo = 0;
+ }
}
/*
@@ -590,6 +602,33 @@ static int pin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
goto unpin;
scb_s->riccbd = hpa;
}
+ if ((scb_s->ecb & ECB_GS) && !(scb_s->ecd & ECD_HOSTREGMGMT)) {
+ unsigned long sdnxc;
+
+ gpa = scb_o->sdnxo & ~0xfUL;
+ sdnxc = scb_o->sdnxo & 0xfUL;
+ if (!gpa || !(gpa & ~0x1fffUL)) {
+ rc = set_validity_icpt(scb_s, 0x10b0U);
+ goto unpin;
+ }
+ if (sdnxc < 6 || sdnxc > 12) {
+ rc = set_validity_icpt(scb_s, 0x10b1U);
+ goto unpin;
+ }
+ if (gpa & ((1 << sdnxc) - 1)) {
+ rc = set_validity_icpt(scb_s, 0x10b2U);
+ goto unpin;
+ }
+ /* Due to alignment rules (checked above) this cannot
+ * cross page boundaries
+ */
+ rc = pin_guest_page(vcpu->kvm, gpa, &hpa);
+ if (rc == -EINVAL)
+ rc = set_validity_icpt(scb_s, 0x10b0U);
+ if (rc)
+ goto unpin;
+ scb_s->sdnxo = hpa;
+ }
return 0;
unpin:
unpin_blocks(vcpu, vsie_page);
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