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s390x/kvm: enable guarded storage
Introduce guarded storage support for KVM guests on s390. We need to enable the capability, extend machine check validity, sigp store-additional-status-at-address, and migration. The feature is fenced for older machine type versions. Signed-off-by: Fan Zhang <zhangfan@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Fan Zhang
Christian Borntraeger
parent
c0a9cd940e
commit
62deb62d99
@ -211,6 +211,7 @@ static void ccw_machine_class_init(ObjectClass *oc, void *data)
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s390mc->ri_allowed = true;
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s390mc->cpu_model_allowed = true;
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s390mc->css_migration_enabled = true;
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s390mc->gs_allowed = true;
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mc->init = ccw_init;
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mc->reset = s390_machine_reset;
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mc->hot_add_cpu = s390_hot_add_cpu;
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@ -288,6 +289,22 @@ bool cpu_model_allowed(void)
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return get_machine_class()->cpu_model_allowed;
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}
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bool gs_allowed(void)
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{
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if (kvm_enabled()) {
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MachineClass *mc = MACHINE_GET_CLASS(qdev_get_machine());
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if (object_class_dynamic_cast(OBJECT_CLASS(mc),
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TYPE_S390_CCW_MACHINE)) {
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S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
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return s390mc->gs_allowed;
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}
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/* Make sure the "none" machine can have gs */
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return true;
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}
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return false;
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}
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static char *machine_get_loadparm(Object *obj, Error **errp)
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{
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S390CcwMachineState *ms = S390_CCW_MACHINE(obj);
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@ -515,6 +532,7 @@ static void ccw_machine_2_9_class_options(MachineClass *mc)
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{
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S390CcwMachineClass *s390mc = S390_MACHINE_CLASS(mc);
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s390mc->gs_allowed = false;
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ccw_machine_2_10_class_options(mc);
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SET_MACHINE_COMPAT(mc, CCW_COMPAT_2_9);
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s390mc->css_migration_enabled = false;
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@ -40,12 +40,15 @@ typedef struct S390CcwMachineClass {
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bool ri_allowed;
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bool cpu_model_allowed;
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bool css_migration_enabled;
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bool gs_allowed;
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} S390CcwMachineClass;
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/* runtime-instrumentation allowed by the machine */
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bool ri_allowed(void);
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/* cpu model allowed by the machine */
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bool cpu_model_allowed(void);
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/* guarded-storage allowed by the machine */
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bool gs_allowed(void);
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/**
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* Returns true if (vmstate based) migration of the channel subsystem
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@ -89,6 +89,7 @@ typedef struct CPUS390XState {
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CPU_DoubleU vregs[32][2]; /* vector registers */
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uint32_t aregs[16]; /* access registers */
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uint8_t riccb[64]; /* runtime instrumentation control */
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uint64_t gscb[4]; /* guarded storage control */
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/* Fields up to this point are not cleared by initial CPU reset */
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struct {} start_initial_reset_fields;
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@ -1166,6 +1167,7 @@ int kvm_s390_set_mem_limit(KVMState *s, uint64_t new_limit, uint64_t *hw_limit);
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void kvm_s390_vcpu_interrupt_pre_save(S390CPU *cpu);
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int kvm_s390_vcpu_interrupt_post_load(S390CPU *cpu);
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int kvm_s390_get_ri(void);
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int kvm_s390_get_gs(void);
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void kvm_s390_crypto_reset(void);
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#else
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static inline void kvm_s390_io_interrupt(uint16_t subchannel_id,
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@ -1220,6 +1222,10 @@ static inline int kvm_s390_get_ri(void)
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{
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return 0;
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}
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static inline int kvm_s390_get_gs(void)
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{
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return 0;
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}
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static inline void kvm_s390_crypto_reset(void)
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{
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}
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@ -1328,6 +1334,7 @@ static inline bool s390_get_squash_mcss(void)
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#define MCIC_VB_CR 0x0000000400000000ULL
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#define MCIC_VB_ST 0x0000000100000000ULL
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#define MCIC_VB_AR 0x0000000040000000ULL
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#define MCIC_VB_GS 0x0000000008000000ULL
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#define MCIC_VB_PR 0x0000000000200000ULL
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#define MCIC_VB_FC 0x0000000000100000ULL
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#define MCIC_VB_CT 0x0000000000020000ULL
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@ -139,6 +139,7 @@ static int cap_async_pf;
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static int cap_mem_op;
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static int cap_s390_irq;
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static int cap_ri;
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static int cap_gs;
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static int active_cmma;
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@ -301,6 +302,11 @@ int kvm_arch_init(MachineState *ms, KVMState *s)
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cap_ri = 1;
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}
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}
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if (gs_allowed()) {
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if (kvm_vm_enable_cap(s, KVM_CAP_S390_GS, 0) == 0) {
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cap_gs = 1;
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}
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}
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/* Try to enable AIS facility */
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kvm_vm_enable_cap(s, KVM_CAP_S390_AIS, 0);
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@ -472,6 +478,11 @@ int kvm_arch_put_registers(CPUState *cs, int level)
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}
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}
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if (can_sync_regs(cs, KVM_SYNC_GSCB)) {
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memcpy(cs->kvm_run->s.regs.gscb, env->gscb, 32);
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cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_GSCB;
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}
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/* Finally the prefix */
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if (can_sync_regs(cs, KVM_SYNC_PREFIX)) {
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cs->kvm_run->s.regs.prefix = env->psa;
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@ -578,6 +589,10 @@ int kvm_arch_get_registers(CPUState *cs)
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memcpy(env->riccb, cs->kvm_run->s.regs.riccb, 64);
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}
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if (can_sync_regs(cs, KVM_SYNC_GSCB)) {
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memcpy(env->gscb, cs->kvm_run->s.regs.gscb, 32);
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}
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/* pfault parameters */
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if (can_sync_regs(cs, KVM_SYNC_PFAULT)) {
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env->pfault_token = cs->kvm_run->s.regs.pft;
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@ -1474,22 +1489,28 @@ static void sigp_stop(CPUState *cs, run_on_cpu_data arg)
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si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
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}
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#define ADTL_SAVE_AREA_SIZE 1024
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static int kvm_s390_store_adtl_status(S390CPU *cpu, hwaddr addr)
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#define ADTL_GS_OFFSET 1024 /* offset of GS data in adtl save area */
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#define ADTL_GS_MIN_SIZE 2048 /* minimal size of adtl save area for GS */
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static int do_store_adtl_status(S390CPU *cpu, hwaddr addr, hwaddr len)
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{
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hwaddr save = len;
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void *mem;
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hwaddr len = ADTL_SAVE_AREA_SIZE;
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mem = cpu_physical_memory_map(addr, &len, 1);
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mem = cpu_physical_memory_map(addr, &save, 1);
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if (!mem) {
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return -EFAULT;
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}
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if (len != ADTL_SAVE_AREA_SIZE) {
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if (save != len) {
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cpu_physical_memory_unmap(mem, len, 1, 0);
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return -EFAULT;
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}
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if (s390_has_feat(S390_FEAT_VECTOR)) {
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memcpy(mem, &cpu->env.vregs, 512);
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}
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if (s390_has_feat(S390_FEAT_GUARDED_STORAGE) && len >= ADTL_GS_MIN_SIZE) {
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memcpy(mem + ADTL_GS_OFFSET, &cpu->env.gscb, 32);
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}
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cpu_physical_memory_unmap(mem, len, 1, len);
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@ -1585,12 +1606,17 @@ static void sigp_store_status_at_address(CPUState *cs, run_on_cpu_data arg)
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si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
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}
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#define ADTL_SAVE_LC_MASK 0xfUL
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static void sigp_store_adtl_status(CPUState *cs, run_on_cpu_data arg)
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{
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S390CPU *cpu = S390_CPU(cs);
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SigpInfo *si = arg.host_ptr;
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uint8_t lc = si->param & ADTL_SAVE_LC_MASK;
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hwaddr addr = si->param & ~ADTL_SAVE_LC_MASK;
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hwaddr len = 1UL << (lc ? lc : 10);
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if (!s390_has_feat(S390_FEAT_VECTOR)) {
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if (!s390_has_feat(S390_FEAT_VECTOR) &&
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!s390_has_feat(S390_FEAT_GUARDED_STORAGE)) {
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set_sigp_status(si, SIGP_STAT_INVALID_ORDER);
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return;
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}
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@ -1601,15 +1627,32 @@ static void sigp_store_adtl_status(CPUState *cs, run_on_cpu_data arg)
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return;
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}
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/* parameter must be aligned to 1024-byte boundary */
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if (si->param & 0x3ff) {
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/* address must be aligned to length */
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if (addr & (len - 1)) {
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set_sigp_status(si, SIGP_STAT_INVALID_PARAMETER);
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return;
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}
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/* no GS: only lc == 0 is valid */
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if (!s390_has_feat(S390_FEAT_GUARDED_STORAGE) &&
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lc != 0) {
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set_sigp_status(si, SIGP_STAT_INVALID_PARAMETER);
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return;
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}
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/* GS: 0, 10, 11, 12 are valid */
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if (s390_has_feat(S390_FEAT_GUARDED_STORAGE) &&
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lc != 0 &&
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lc != 10 &&
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lc != 11 &&
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lc != 12) {
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set_sigp_status(si, SIGP_STAT_INVALID_PARAMETER);
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return;
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}
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cpu_synchronize_state(cs);
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if (kvm_s390_store_adtl_status(cpu, si->param)) {
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if (do_store_adtl_status(cpu, addr, len)) {
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set_sigp_status(si, SIGP_STAT_INVALID_PARAMETER);
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return;
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}
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@ -2188,6 +2231,9 @@ static uint64_t build_channel_report_mcic(void)
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if (s390_has_feat(S390_FEAT_VECTOR)) {
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mcic |= MCIC_VB_VR;
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}
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if (s390_has_feat(S390_FEAT_GUARDED_STORAGE)) {
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mcic |= MCIC_VB_GS;
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}
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return mcic;
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}
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@ -2253,6 +2299,11 @@ int kvm_s390_get_ri(void)
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return cap_ri;
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}
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int kvm_s390_get_gs(void)
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{
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return cap_gs;
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}
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int kvm_s390_set_cpu_state(S390CPU *cpu, uint8_t cpu_state)
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{
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struct kvm_mp_state mp_state = {};
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@ -174,6 +174,22 @@ const VMStateDescription vmstate_exval = {
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}
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};
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static bool gscb_needed(void *opaque)
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{
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return kvm_s390_get_gs();
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}
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const VMStateDescription vmstate_gscb = {
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.name = "cpu/gscb",
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.version_id = 1,
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.minimum_version_id = 1,
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.needed = gscb_needed,
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.fields = (VMStateField[]) {
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VMSTATE_UINT64_ARRAY(env.gscb, S390CPU, 4),
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VMSTATE_END_OF_LIST()
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}
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};
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const VMStateDescription vmstate_s390_cpu = {
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.name = "cpu",
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.post_load = cpu_post_load,
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@ -207,6 +223,7 @@ const VMStateDescription vmstate_s390_cpu = {
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&vmstate_vregs,
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&vmstate_riccb,
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&vmstate_exval,
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&vmstate_gscb,
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NULL
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},
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};
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