* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
-#include <sys/types.h>
+#include "qemu/osdep.h"
#include <sys/ioctl.h>
-#include <sys/mman.h>
#include <linux/kvm.h>
#include <asm/ptrace.h>
#include "qemu-common.h"
+#include "cpu.h"
+#include "qemu/error-report.h"
#include "qemu/timer.h"
#include "sysemu/sysemu.h"
#include "sysemu/kvm.h"
#include "hw/hw.h"
-#include "cpu.h"
#include "sysemu/device_tree.h"
#include "qapi/qmp/qjson.h"
-#include "monitor/monitor.h"
#include "exec/gdbstub.h"
#include "exec/address-spaces.h"
#include "trace.h"
#include "hw/s390x/s390-pci-bus.h"
#include "hw/s390x/ipl.h"
#include "hw/s390x/ebcdic.h"
+#include "exec/memattrs.h"
+#include "hw/s390x/s390-virtio-ccw.h"
/* #define DEBUG_KVM */
#define PRIV_E3_MPCIFC 0xd0
#define PRIV_E3_STPCIFC 0xd4
+#define DIAG_TIMEREVENT 0x288
#define DIAG_IPL 0x308
#define DIAG_KVM_HYPERCALL 0x500
#define DIAG_KVM_BREAKPOINT 0x501
#define ICPT_WAITPSW 0x1c
#define ICPT_SOFT_INTERCEPT 0x24
#define ICPT_CPU_STOP 0x28
+#define ICPT_OPEREXC 0x2c
#define ICPT_IO 0x40
#define NR_LOCAL_IRQS 32
static int cap_async_pf;
static int cap_mem_op;
static int cap_s390_irq;
+static int cap_ri;
static void *legacy_s390_alloc(size_t size, uint64_t *align);
return kvm_vm_ioctl(s, KVM_SET_DEVICE_ATTR, &attr);
}
-void kvm_s390_clear_cmma_callback(void *opaque)
+static bool kvm_s390_cmma_available(void)
+{
+ static bool initialized, value;
+
+ if (!initialized) {
+ initialized = true;
+ value = kvm_vm_check_mem_attr(kvm_state, KVM_S390_VM_MEM_ENABLE_CMMA) &&
+ kvm_vm_check_mem_attr(kvm_state, KVM_S390_VM_MEM_CLR_CMMA);
+ }
+ return value;
+}
+
+void kvm_s390_cmma_reset(void)
{
int rc;
- KVMState *s = opaque;
struct kvm_device_attr attr = {
.group = KVM_S390_VM_MEM_CTRL,
.attr = KVM_S390_VM_MEM_CLR_CMMA,
};
- rc = kvm_vm_ioctl(s, KVM_SET_DEVICE_ATTR, &attr);
+ if (!mem_path || !kvm_s390_cmma_available()) {
+ return;
+ }
+
+ rc = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
trace_kvm_clear_cmma(rc);
}
-static void kvm_s390_enable_cmma(KVMState *s)
+static void kvm_s390_enable_cmma(void)
{
int rc;
struct kvm_device_attr attr = {
.attr = KVM_S390_VM_MEM_ENABLE_CMMA,
};
- if (!kvm_vm_check_mem_attr(s, KVM_S390_VM_MEM_ENABLE_CMMA) ||
- !kvm_vm_check_mem_attr(s, KVM_S390_VM_MEM_CLR_CMMA)) {
- return;
- }
-
- rc = kvm_vm_ioctl(s, KVM_SET_DEVICE_ATTR, &attr);
- if (!rc) {
- qemu_register_reset(kvm_s390_clear_cmma_callback, s);
- }
+ rc = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
trace_kvm_enable_cmma(rc);
}
}
}
-static void kvm_s390_init_crypto(void)
+void kvm_s390_crypto_reset(void)
{
- kvm_s390_init_aes_kw();
- kvm_s390_init_dea_kw();
+ if (s390_has_feat(S390_FEAT_MSA_EXT_3)) {
+ kvm_s390_init_aes_kw();
+ kvm_s390_init_dea_kw();
+ }
}
int kvm_arch_init(MachineState *ms, KVMState *s)
cap_mem_op = kvm_check_extension(s, KVM_CAP_S390_MEM_OP);
cap_s390_irq = kvm_check_extension(s, KVM_CAP_S390_INJECT_IRQ);
- kvm_s390_enable_cmma(s);
-
if (!kvm_check_extension(s, KVM_CAP_S390_GMAP)
|| !kvm_check_extension(s, KVM_CAP_S390_COW)) {
phys_mem_set_alloc(legacy_s390_alloc);
}
kvm_vm_enable_cap(s, KVM_CAP_S390_USER_SIGP, 0);
+ kvm_vm_enable_cap(s, KVM_CAP_S390_VECTOR_REGISTERS, 0);
kvm_vm_enable_cap(s, KVM_CAP_S390_USER_STSI, 0);
+ if (ri_allowed()) {
+ if (kvm_vm_enable_cap(s, KVM_CAP_S390_RI, 0) == 0) {
+ cap_ri = 1;
+ }
+ }
return 0;
}
if (kvm_vcpu_ioctl(cs, KVM_S390_INITIAL_RESET, NULL)) {
error_report("Initial CPU reset failed on CPU %i", cs->cpu_index);
}
-
- kvm_s390_init_crypto();
}
static int can_sync_regs(CPUState *cs, int regs)
}
}
- /* Floating point */
- for (i = 0; i < 16; i++) {
- fpu.fprs[i] = env->fregs[i].ll;
- }
- fpu.fpc = env->fpc;
+ if (can_sync_regs(cs, KVM_SYNC_VRS)) {
+ for (i = 0; i < 32; i++) {
+ cs->kvm_run->s.regs.vrs[i][0] = env->vregs[i][0].ll;
+ cs->kvm_run->s.regs.vrs[i][1] = env->vregs[i][1].ll;
+ }
+ cs->kvm_run->s.regs.fpc = env->fpc;
+ cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_VRS;
+ } else if (can_sync_regs(cs, KVM_SYNC_FPRS)) {
+ for (i = 0; i < 16; i++) {
+ cs->kvm_run->s.regs.fprs[i] = get_freg(env, i)->ll;
+ }
+ cs->kvm_run->s.regs.fpc = env->fpc;
+ cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_FPRS;
+ } else {
+ /* Floating point */
+ for (i = 0; i < 16; i++) {
+ fpu.fprs[i] = get_freg(env, i)->ll;
+ }
+ fpu.fpc = env->fpc;
- r = kvm_vcpu_ioctl(cs, KVM_SET_FPU, &fpu);
- if (r < 0) {
- return r;
+ r = kvm_vcpu_ioctl(cs, KVM_SET_FPU, &fpu);
+ if (r < 0) {
+ return r;
+ }
}
/* Do we need to save more than that? */
kvm_set_one_reg(cs, KVM_REG_S390_PP, &env->pp);
}
+ if (can_sync_regs(cs, KVM_SYNC_RICCB)) {
+ memcpy(cs->kvm_run->s.regs.riccb, env->riccb, 64);
+ cs->kvm_run->kvm_dirty_regs |= KVM_SYNC_RICCB;
+ }
+
/* pfault parameters */
if (can_sync_regs(cs, KVM_SYNC_PFAULT)) {
cs->kvm_run->s.regs.pft = env->pfault_token;
}
}
- /* Floating point */
- r = kvm_vcpu_ioctl(cs, KVM_GET_FPU, &fpu);
- if (r < 0) {
- return r;
- }
- for (i = 0; i < 16; i++) {
- env->fregs[i].ll = fpu.fprs[i];
+ /* Floating point and vector registers */
+ if (can_sync_regs(cs, KVM_SYNC_VRS)) {
+ for (i = 0; i < 32; i++) {
+ env->vregs[i][0].ll = cs->kvm_run->s.regs.vrs[i][0];
+ env->vregs[i][1].ll = cs->kvm_run->s.regs.vrs[i][1];
+ }
+ env->fpc = cs->kvm_run->s.regs.fpc;
+ } else if (can_sync_regs(cs, KVM_SYNC_FPRS)) {
+ for (i = 0; i < 16; i++) {
+ get_freg(env, i)->ll = cs->kvm_run->s.regs.fprs[i];
+ }
+ env->fpc = cs->kvm_run->s.regs.fpc;
+ } else {
+ r = kvm_vcpu_ioctl(cs, KVM_GET_FPU, &fpu);
+ if (r < 0) {
+ return r;
+ }
+ for (i = 0; i < 16; i++) {
+ get_freg(env, i)->ll = fpu.fprs[i];
+ }
+ env->fpc = fpu.fpc;
}
- env->fpc = fpu.fpc;
/* The prefix */
if (can_sync_regs(cs, KVM_SYNC_PREFIX)) {
kvm_get_one_reg(cs, KVM_REG_S390_PP, &env->pp);
}
+ if (can_sync_regs(cs, KVM_SYNC_RICCB)) {
+ memcpy(env->riccb, cs->kvm_run->s.regs.riccb, 64);
+ }
+
/* pfault parameters */
if (can_sync_regs(cs, KVM_SYNC_PFAULT)) {
env->pfault_token = cs->kvm_run->s.regs.pft;
* @addr: the logical start address in guest memory
* @ar: the access register number
* @hostbuf: buffer in host memory. NULL = do only checks w/o copying
- * @len: length that should be transfered
+ * @len: length that should be transferred
* @is_write: true = write, false = read
- * Returns: 0 on success, non-zero if an exception or error occured
+ * Returns: 0 on success, non-zero if an exception or error occurred
*
* Use KVM ioctl to read/write from/to guest memory. An access exception
* is injected into the vCPU in case of translation errors.
return mem == MAP_FAILED ? NULL : mem;
}
-/* DIAG 501 is used for sw breakpoints */
-static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};
+static uint8_t const *sw_bp_inst;
+static uint8_t sw_bp_ilen;
+
+static void determine_sw_breakpoint_instr(void)
+{
+ /* DIAG 501 is used for sw breakpoints with old kernels */
+ static const uint8_t diag_501[] = {0x83, 0x24, 0x05, 0x01};
+ /* Instruction 0x0000 is used for sw breakpoints with recent kernels */
+ static const uint8_t instr_0x0000[] = {0x00, 0x00};
+
+ if (sw_bp_inst) {
+ return;
+ }
+ if (kvm_vm_enable_cap(kvm_state, KVM_CAP_S390_USER_INSTR0, 0)) {
+ sw_bp_inst = diag_501;
+ sw_bp_ilen = sizeof(diag_501);
+ DPRINTF("KVM: will use 4-byte sw breakpoints.\n");
+ } else {
+ sw_bp_inst = instr_0x0000;
+ sw_bp_ilen = sizeof(instr_0x0000);
+ DPRINTF("KVM: will use 2-byte sw breakpoints.\n");
+ }
+}
int kvm_arch_insert_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp)
{
+ determine_sw_breakpoint_instr();
if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn,
- sizeof(diag_501), 0) ||
- cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)diag_501,
- sizeof(diag_501), 1)) {
+ sw_bp_ilen, 0) ||
+ cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)sw_bp_inst, sw_bp_ilen, 1)) {
return -EINVAL;
}
return 0;
int kvm_arch_remove_sw_breakpoint(CPUState *cs, struct kvm_sw_breakpoint *bp)
{
- uint8_t t[sizeof(diag_501)];
+ uint8_t t[MAX_ILEN];
- if (cpu_memory_rw_debug(cs, bp->pc, t, sizeof(diag_501), 0)) {
+ if (cpu_memory_rw_debug(cs, bp->pc, t, sw_bp_ilen, 0)) {
return -EINVAL;
- } else if (memcmp(t, diag_501, sizeof(diag_501))) {
+ } else if (memcmp(t, sw_bp_inst, sw_bp_ilen)) {
return -EINVAL;
} else if (cpu_memory_rw_debug(cs, bp->pc, (uint8_t *)&bp->saved_insn,
- sizeof(diag_501), 1)) {
+ sw_bp_ilen, 1)) {
return -EINVAL;
}
{
}
-void kvm_arch_post_run(CPUState *cpu, struct kvm_run *run)
+MemTxAttrs kvm_arch_post_run(CPUState *cs, struct kvm_run *run)
{
+ return MEMTXATTRS_UNSPECIFIED;
}
int kvm_arch_process_async_events(CPUState *cs)
__kvm_s390_floating_interrupt(irq);
}
-void kvm_s390_virtio_irq(int config_change, uint64_t token)
-{
- struct kvm_s390_irq irq = {
- .type = KVM_S390_INT_VIRTIO,
- .u.ext.ext_params = config_change,
- .u.ext.ext_params2 = token,
- };
-
- kvm_s390_floating_interrupt(&irq);
-}
-
void kvm_s390_service_interrupt(uint32_t parm)
{
struct kvm_s390_irq irq = {
return ret;
}
+static void kvm_handle_diag_288(S390CPU *cpu, struct kvm_run *run)
+{
+ uint64_t r1, r3;
+ int rc;
+
+ cpu_synchronize_state(CPU(cpu));
+ r1 = (run->s390_sieic.ipa & 0x00f0) >> 4;
+ r3 = run->s390_sieic.ipa & 0x000f;
+ rc = handle_diag_288(&cpu->env, r1, r3);
+ if (rc) {
+ enter_pgmcheck(cpu, PGM_SPECIFICATION);
+ }
+}
+
static void kvm_handle_diag_308(S390CPU *cpu, struct kvm_run *run)
{
uint64_t r1, r3;
cpu_synchronize_state(CPU(cpu));
- pc = env->psw.addr - 4;
+ pc = env->psw.addr - sw_bp_ilen;
if (kvm_find_sw_breakpoint(CPU(cpu), pc)) {
env->psw.addr = pc;
return EXCP_DEBUG;
*/
func_code = decode_basedisp_rs(&cpu->env, ipb, NULL) & DIAG_KVM_CODE_MASK;
switch (func_code) {
+ case DIAG_TIMEREVENT:
+ kvm_handle_diag_288(cpu, run);
+ break;
case DIAG_IPL:
kvm_handle_diag_308(cpu, run);
break;
si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
}
+#define ADTL_SAVE_AREA_SIZE 1024
+static int kvm_s390_store_adtl_status(S390CPU *cpu, hwaddr addr)
+{
+ void *mem;
+ hwaddr len = ADTL_SAVE_AREA_SIZE;
+
+ mem = cpu_physical_memory_map(addr, &len, 1);
+ if (!mem) {
+ return -EFAULT;
+ }
+ if (len != ADTL_SAVE_AREA_SIZE) {
+ cpu_physical_memory_unmap(mem, len, 1, 0);
+ return -EFAULT;
+ }
+
+ memcpy(mem, &cpu->env.vregs, 512);
+
+ cpu_physical_memory_unmap(mem, len, 1, len);
+
+ return 0;
+}
+
#define KVM_S390_STORE_STATUS_DEF_ADDR offsetof(LowCore, floating_pt_save_area)
#define SAVE_AREA_SIZE 512
static int kvm_s390_store_status(S390CPU *cpu, hwaddr addr, bool store_arch)
static const uint8_t ar_id = 1;
uint64_t ckc = cpu->env.ckc >> 8;
void *mem;
+ int i;
hwaddr len = SAVE_AREA_SIZE;
mem = cpu_physical_memory_map(addr, &len, 1);
if (store_arch) {
cpu_physical_memory_write(offsetof(LowCore, ar_access_id), &ar_id, 1);
}
- memcpy(mem, &cpu->env.fregs, 128);
+ for (i = 0; i < 16; ++i) {
+ *((uint64_t *)mem + i) = get_freg(&cpu->env, i)->ll;
+ }
memcpy(mem + 128, &cpu->env.regs, 128);
memcpy(mem + 256, &cpu->env.psw, 16);
memcpy(mem + 280, &cpu->env.psa, 4);
si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
}
+static void sigp_store_adtl_status(void *arg)
+{
+ SigpInfo *si = arg;
+
+ if (!s390_has_feat(S390_FEAT_VECTOR)) {
+ set_sigp_status(si, SIGP_STAT_INVALID_ORDER);
+ return;
+ }
+
+ /* cpu has to be stopped */
+ if (s390_cpu_get_state(si->cpu) != CPU_STATE_STOPPED) {
+ set_sigp_status(si, SIGP_STAT_INCORRECT_STATE);
+ return;
+ }
+
+ /* parameter must be aligned to 1024-byte boundary */
+ if (si->param & 0x3ff) {
+ set_sigp_status(si, SIGP_STAT_INVALID_PARAMETER);
+ return;
+ }
+
+ cpu_synchronize_state(CPU(si->cpu));
+
+ if (kvm_s390_store_adtl_status(si->cpu, si->param)) {
+ set_sigp_status(si, SIGP_STAT_INVALID_PARAMETER);
+ return;
+ }
+ si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
+}
+
static void sigp_restart(void *arg)
{
SigpInfo *si = arg;
case SIGP_STORE_STATUS_ADDR:
run_on_cpu(CPU(dst_cpu), sigp_store_status_at_address, &si);
break;
+ case SIGP_STORE_ADTL_STATUS:
+ run_on_cpu(CPU(dst_cpu), sigp_store_adtl_status, &si);
+ break;
case SIGP_SET_PREFIX:
run_on_cpu(CPU(dst_cpu), sigp_set_prefix, &si);
break;
return cs->kvm_run->psw_addr == 0xfffUL;
}
-static void guest_panicked(void)
-{
- qapi_event_send_guest_panicked(GUEST_PANIC_ACTION_PAUSE,
- &error_abort);
- vm_stop(RUN_STATE_GUEST_PANICKED);
-}
-
static void unmanageable_intercept(S390CPU *cpu, const char *str, int pswoffset)
{
CPUState *cs = CPU(cpu);
str, cs->cpu_index, ldq_phys(cs->as, cpu->env.psa + pswoffset),
ldq_phys(cs->as, cpu->env.psa + pswoffset + 8));
s390_cpu_halt(cpu);
- guest_panicked();
+ qemu_system_guest_panicked();
}
static int handle_intercept(S390CPU *cpu)
if (is_special_wait_psw(cs)) {
qemu_system_shutdown_request();
} else {
- guest_panicked();
+ qemu_system_guest_panicked();
}
}
r = EXCP_HALTED;
cpu->env.sigp_order = 0;
r = EXCP_HALTED;
break;
+ case ICPT_OPEREXC:
+ /* currently only instr 0x0000 after enabled via capability */
+ r = handle_sw_breakpoint(cpu, run);
+ if (r == -ENOENT) {
+ enter_pgmcheck(cpu, PGM_OPERATION);
+ r = 0;
+ }
+ break;
case ICPT_SOFT_INTERCEPT:
fprintf(stderr, "KVM unimplemented icpt SOFT\n");
exit(1);
S390CPU *cpu = S390_CPU(cs);
int ret = 0;
+ qemu_mutex_lock_iothread();
+
switch (run->exit_reason) {
case KVM_EXIT_S390_SIEIC:
ret = handle_intercept(cpu);
fprintf(stderr, "Unknown KVM exit: %d\n", run->exit_reason);
break;
}
+ qemu_mutex_unlock_iothread();
if (ret == 0) {
ret = EXCP_INTERRUPT;
if (io_int_word & IO_INT_WORD_AI) {
irq.type = KVM_S390_INT_IO(1, 0, 0, 0);
} else {
- irq.type = ((subchannel_id & 0xff00) << 24) |
- ((subchannel_id & 0x00060) << 22) | (subchannel_nr << 16);
+ irq.type = KVM_S390_INT_IO(0, (subchannel_id & 0xff00) >> 8,
+ (subchannel_id & 0x0006),
+ subchannel_nr);
}
kvm_s390_floating_interrupt(&irq);
}
+static uint64_t build_channel_report_mcic(void)
+{
+ uint64_t mcic;
+
+ /* subclass: indicate channel report pending */
+ mcic = MCIC_SC_CP |
+ /* subclass modifiers: none */
+ /* storage errors: none */
+ /* validity bits: no damage */
+ MCIC_VB_WP | MCIC_VB_MS | MCIC_VB_PM | MCIC_VB_IA | MCIC_VB_FP |
+ MCIC_VB_GR | MCIC_VB_CR | MCIC_VB_ST | MCIC_VB_AR | MCIC_VB_PR |
+ MCIC_VB_FC | MCIC_VB_CT | MCIC_VB_CC;
+ if (s390_has_feat(S390_FEAT_VECTOR)) {
+ mcic |= MCIC_VB_VR;
+ }
+ return mcic;
+}
+
void kvm_s390_crw_mchk(void)
{
struct kvm_s390_irq irq = {
.type = KVM_S390_MCHK,
.u.mchk.cr14 = 1 << 28,
- .u.mchk.mcic = 0x00400f1d40330000ULL,
+ .u.mchk.mcic = build_channel_report_mcic(),
};
kvm_s390_floating_interrupt(&irq);
}
return kvm_check_extension(s, KVM_CAP_NR_MEMSLOTS);
}
+int kvm_s390_get_ri(void)
+{
+ return cap_ri;
+}
+
int kvm_s390_set_cpu_state(S390CPU *cpu, uint8_t cpu_state)
{
struct kvm_mp_state mp_state = {};
struct kvm_s390_irq_state irq_state;
int r;
+ if (cpu->irqstate_saved_size == 0) {
+ return 0;
+ }
+
if (!kvm_check_extension(kvm_state, KVM_CAP_S390_IRQ_STATE)) {
return -ENOSYS;
}
- if (cpu->irqstate_saved_size == 0) {
- return 0;
- }
irq_state.buf = (uint64_t) cpu->irqstate;
irq_state.len = cpu->irqstate_saved_size;
}
int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
- uint64_t address, uint32_t data)
+ uint64_t address, uint32_t data, PCIDevice *dev)
{
S390PCIBusDevice *pbdev;
- uint32_t fid = data >> ZPCI_MSI_VEC_BITS;
+ uint32_t idx = data >> ZPCI_MSI_VEC_BITS;
uint32_t vec = data & ZPCI_MSI_VEC_MASK;
- pbdev = s390_pci_find_dev_by_fid(fid);
+ pbdev = s390_pci_find_dev_by_idx(idx);
if (!pbdev) {
DPRINTF("add_msi_route no dev\n");
return -ENODEV;
route->u.adapter.adapter_id = pbdev->routes.adapter.adapter_id;
return 0;
}
+
+int kvm_arch_add_msi_route_post(struct kvm_irq_routing_entry *route,
+ int vector, PCIDevice *dev)
+{
+ return 0;
+}
+
+int kvm_arch_release_virq_post(int virq)
+{
+ return 0;
+}
+
+int kvm_arch_msi_data_to_gsi(uint32_t data)
+{
+ abort();
+}
+
+static inline int test_bit_inv(long nr, const unsigned long *addr)
+{
+ return test_bit(BE_BIT_NR(nr), addr);
+}
+
+static inline void set_bit_inv(long nr, unsigned long *addr)
+{
+ set_bit(BE_BIT_NR(nr), addr);
+}
+
+static int query_cpu_subfunc(S390FeatBitmap features)
+{
+ struct kvm_s390_vm_cpu_subfunc prop;
+ struct kvm_device_attr attr = {
+ .group = KVM_S390_VM_CPU_MODEL,
+ .attr = KVM_S390_VM_CPU_MACHINE_SUBFUNC,
+ .addr = (uint64_t) &prop,
+ };
+ int rc;
+
+ rc = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr);
+ if (rc) {
+ return rc;
+ }
+
+ /*
+ * We're going to add all subfunctions now, if the corresponding feature
+ * is available that unlocks the query functions.
+ */
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_PLO, prop.plo);
+ if (test_bit(S390_FEAT_TOD_CLOCK_STEERING, features)) {
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_PTFF, prop.ptff);
+ }
+ if (test_bit(S390_FEAT_MSA, features)) {
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_KMAC, prop.kmac);
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_KMC, prop.kmc);
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_KM, prop.km);
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_KIMD, prop.kimd);
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_KLMD, prop.klmd);
+ }
+ if (test_bit(S390_FEAT_MSA_EXT_3, features)) {
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_PCKMO, prop.pckmo);
+ }
+ if (test_bit(S390_FEAT_MSA_EXT_4, features)) {
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_KMCTR, prop.kmctr);
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_KMF, prop.kmf);
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_KMO, prop.kmo);
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_PCC, prop.pcc);
+ }
+ if (test_bit(S390_FEAT_MSA_EXT_5, features)) {
+ s390_add_from_feat_block(features, S390_FEAT_TYPE_PPNO, prop.ppno);
+ }
+ return 0;
+}
+
+static int configure_cpu_subfunc(const S390FeatBitmap features)
+{
+ struct kvm_s390_vm_cpu_subfunc prop = {};
+ struct kvm_device_attr attr = {
+ .group = KVM_S390_VM_CPU_MODEL,
+ .attr = KVM_S390_VM_CPU_PROCESSOR_SUBFUNC,
+ .addr = (uint64_t) &prop,
+ };
+
+ if (!kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
+ KVM_S390_VM_CPU_PROCESSOR_SUBFUNC)) {
+ /* hardware support might be missing, IBC will handle most of this */
+ return 0;
+ }
+
+ s390_fill_feat_block(features, S390_FEAT_TYPE_PLO, prop.plo);
+ if (test_bit(S390_FEAT_TOD_CLOCK_STEERING, features)) {
+ s390_fill_feat_block(features, S390_FEAT_TYPE_PTFF, prop.ptff);
+ prop.ptff[0] |= 0x80; /* query is always available */
+ }
+ if (test_bit(S390_FEAT_MSA, features)) {
+ s390_fill_feat_block(features, S390_FEAT_TYPE_KMAC, prop.kmac);
+ prop.kmac[0] |= 0x80; /* query is always available */
+ s390_fill_feat_block(features, S390_FEAT_TYPE_KMC, prop.kmc);
+ prop.kmc[0] |= 0x80; /* query is always available */
+ s390_fill_feat_block(features, S390_FEAT_TYPE_KM, prop.km);
+ prop.km[0] |= 0x80; /* query is always available */
+ s390_fill_feat_block(features, S390_FEAT_TYPE_KIMD, prop.kimd);
+ prop.kimd[0] |= 0x80; /* query is always available */
+ s390_fill_feat_block(features, S390_FEAT_TYPE_KLMD, prop.klmd);
+ prop.klmd[0] |= 0x80; /* query is always available */
+ }
+ if (test_bit(S390_FEAT_MSA_EXT_3, features)) {
+ s390_fill_feat_block(features, S390_FEAT_TYPE_PCKMO, prop.pckmo);
+ prop.pckmo[0] |= 0x80; /* query is always available */
+ }
+ if (test_bit(S390_FEAT_MSA_EXT_4, features)) {
+ s390_fill_feat_block(features, S390_FEAT_TYPE_KMCTR, prop.kmctr);
+ prop.kmctr[0] |= 0x80; /* query is always available */
+ s390_fill_feat_block(features, S390_FEAT_TYPE_KMF, prop.kmf);
+ prop.kmf[0] |= 0x80; /* query is always available */
+ s390_fill_feat_block(features, S390_FEAT_TYPE_KMO, prop.kmo);
+ prop.kmo[0] |= 0x80; /* query is always available */
+ s390_fill_feat_block(features, S390_FEAT_TYPE_PCC, prop.pcc);
+ prop.pcc[0] |= 0x80; /* query is always available */
+ }
+ if (test_bit(S390_FEAT_MSA_EXT_5, features)) {
+ s390_fill_feat_block(features, S390_FEAT_TYPE_PPNO, prop.ppno);
+ prop.ppno[0] |= 0x80; /* query is always available */
+ }
+ return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
+}
+
+static int kvm_to_feat[][2] = {
+ { KVM_S390_VM_CPU_FEAT_ESOP, S390_FEAT_ESOP },
+ { KVM_S390_VM_CPU_FEAT_SIEF2, S390_FEAT_SIE_F2 },
+ { KVM_S390_VM_CPU_FEAT_64BSCAO , S390_FEAT_SIE_64BSCAO },
+ { KVM_S390_VM_CPU_FEAT_SIIF, S390_FEAT_SIE_SIIF },
+ { KVM_S390_VM_CPU_FEAT_GPERE, S390_FEAT_SIE_GPERE },
+ { KVM_S390_VM_CPU_FEAT_GSLS, S390_FEAT_SIE_GSLS },
+ { KVM_S390_VM_CPU_FEAT_IB, S390_FEAT_SIE_IB },
+ { KVM_S390_VM_CPU_FEAT_CEI, S390_FEAT_SIE_CEI },
+ { KVM_S390_VM_CPU_FEAT_IBS, S390_FEAT_SIE_IBS },
+ { KVM_S390_VM_CPU_FEAT_SKEY, S390_FEAT_SIE_SKEY },
+ { KVM_S390_VM_CPU_FEAT_CMMA, S390_FEAT_SIE_CMMA },
+ { KVM_S390_VM_CPU_FEAT_PFMFI, S390_FEAT_SIE_PFMFI},
+ { KVM_S390_VM_CPU_FEAT_SIGPIF, S390_FEAT_SIE_SIGPIF},
+};
+
+static int query_cpu_feat(S390FeatBitmap features)
+{
+ struct kvm_s390_vm_cpu_feat prop;
+ struct kvm_device_attr attr = {
+ .group = KVM_S390_VM_CPU_MODEL,
+ .attr = KVM_S390_VM_CPU_MACHINE_FEAT,
+ .addr = (uint64_t) &prop,
+ };
+ int rc;
+ int i;
+
+ rc = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr);
+ if (rc) {
+ return rc;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(kvm_to_feat); i++) {
+ if (test_bit_inv(kvm_to_feat[i][0], (unsigned long *)prop.feat)) {
+ set_bit(kvm_to_feat[i][1], features);
+ }
+ }
+ return 0;
+}
+
+static int configure_cpu_feat(const S390FeatBitmap features)
+{
+ struct kvm_s390_vm_cpu_feat prop = {};
+ struct kvm_device_attr attr = {
+ .group = KVM_S390_VM_CPU_MODEL,
+ .attr = KVM_S390_VM_CPU_PROCESSOR_FEAT,
+ .addr = (uint64_t) &prop,
+ };
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(kvm_to_feat); i++) {
+ if (test_bit(kvm_to_feat[i][1], features)) {
+ set_bit_inv(kvm_to_feat[i][0], (unsigned long *)prop.feat);
+ }
+ }
+ return kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
+}
+
+bool kvm_s390_cpu_models_supported(void)
+{
+ if (!ri_allowed()) {
+ /* compatibility machines interfere with the cpu model */
+ return false;
+ }
+ return kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
+ KVM_S390_VM_CPU_MACHINE) &&
+ kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
+ KVM_S390_VM_CPU_PROCESSOR) &&
+ kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
+ KVM_S390_VM_CPU_MACHINE_FEAT) &&
+ kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
+ KVM_S390_VM_CPU_PROCESSOR_FEAT) &&
+ kvm_vm_check_attr(kvm_state, KVM_S390_VM_CPU_MODEL,
+ KVM_S390_VM_CPU_MACHINE_SUBFUNC);
+}
+
+void kvm_s390_get_host_cpu_model(S390CPUModel *model, Error **errp)
+{
+ struct kvm_s390_vm_cpu_machine prop = {};
+ struct kvm_device_attr attr = {
+ .group = KVM_S390_VM_CPU_MODEL,
+ .attr = KVM_S390_VM_CPU_MACHINE,
+ .addr = (uint64_t) &prop,
+ };
+ uint16_t unblocked_ibc = 0, cpu_type = 0;
+ int rc;
+
+ memset(model, 0, sizeof(*model));
+
+ if (!kvm_s390_cpu_models_supported()) {
+ error_setg(errp, "KVM doesn't support CPU models");
+ return;
+ }
+
+ /* query the basic cpu model properties */
+ rc = kvm_vm_ioctl(kvm_state, KVM_GET_DEVICE_ATTR, &attr);
+ if (rc) {
+ error_setg(errp, "KVM: Error querying host CPU model: %d", rc);
+ return;
+ }
+
+ cpu_type = cpuid_type(prop.cpuid);
+ if (has_ibc(prop.ibc)) {
+ model->lowest_ibc = lowest_ibc(prop.ibc);
+ unblocked_ibc = unblocked_ibc(prop.ibc);
+ }
+ model->cpu_id = cpuid_id(prop.cpuid);
+ model->cpu_ver = 0xff;
+
+ /* get supported cpu features indicated via STFL(E) */
+ s390_add_from_feat_block(model->features, S390_FEAT_TYPE_STFL,
+ (uint8_t *) prop.fac_mask);
+ /* dat-enhancement facility 2 has no bit but was introduced with stfle */
+ if (test_bit(S390_FEAT_STFLE, model->features)) {
+ set_bit(S390_FEAT_DAT_ENH_2, model->features);
+ }
+ /* get supported cpu features indicated e.g. via SCLP */
+ rc = query_cpu_feat(model->features);
+ if (rc) {
+ error_setg(errp, "KVM: Error querying CPU features: %d", rc);
+ return;
+ }
+ /* get supported cpu subfunctions indicated via query / test bit */
+ rc = query_cpu_subfunc(model->features);
+ if (rc) {
+ error_setg(errp, "KVM: Error querying CPU subfunctions: %d", rc);
+ return;
+ }
+
+ /* with cpu model support, CMM is only indicated if really available */
+ if (kvm_s390_cmma_available()) {
+ set_bit(S390_FEAT_CMM, model->features);
+ }
+
+ if (s390_known_cpu_type(cpu_type)) {
+ /* we want the exact model, even if some features are missing */
+ model->def = s390_find_cpu_def(cpu_type, ibc_gen(unblocked_ibc),
+ ibc_ec_ga(unblocked_ibc), NULL);
+ } else {
+ /* model unknown, e.g. too new - search using features */
+ model->def = s390_find_cpu_def(0, ibc_gen(unblocked_ibc),
+ ibc_ec_ga(unblocked_ibc),
+ model->features);
+ }
+ if (!model->def) {
+ error_setg(errp, "KVM: host CPU model could not be identified");
+ return;
+ }
+ /* strip of features that are not part of the maximum model */
+ bitmap_and(model->features, model->features, model->def->full_feat,
+ S390_FEAT_MAX);
+}
+
+void kvm_s390_apply_cpu_model(const S390CPUModel *model, Error **errp)
+{
+ struct kvm_s390_vm_cpu_processor prop = {
+ .fac_list = { 0 },
+ };
+ struct kvm_device_attr attr = {
+ .group = KVM_S390_VM_CPU_MODEL,
+ .attr = KVM_S390_VM_CPU_PROCESSOR,
+ .addr = (uint64_t) &prop,
+ };
+ int rc;
+
+ if (!model) {
+ /* compatibility handling if cpu models are disabled */
+ if (kvm_s390_cmma_available() && !mem_path) {
+ kvm_s390_enable_cmma();
+ }
+ return;
+ }
+ if (!kvm_s390_cpu_models_supported()) {
+ error_setg(errp, "KVM doesn't support CPU models");
+ return;
+ }
+ prop.cpuid = s390_cpuid_from_cpu_model(model);
+ prop.ibc = s390_ibc_from_cpu_model(model);
+ /* configure cpu features indicated via STFL(e) */
+ s390_fill_feat_block(model->features, S390_FEAT_TYPE_STFL,
+ (uint8_t *) prop.fac_list);
+ rc = kvm_vm_ioctl(kvm_state, KVM_SET_DEVICE_ATTR, &attr);
+ if (rc) {
+ error_setg(errp, "KVM: Error configuring the CPU model: %d", rc);
+ return;
+ }
+ /* configure cpu features indicated e.g. via SCLP */
+ rc = configure_cpu_feat(model->features);
+ if (rc) {
+ error_setg(errp, "KVM: Error configuring CPU features: %d", rc);
+ return;
+ }
+ /* configure cpu subfunctions indicated via query / test bit */
+ rc = configure_cpu_subfunc(model->features);
+ if (rc) {
+ error_setg(errp, "KVM: Error configuring CPU subfunctions: %d", rc);
+ return;
+ }
+ /* enable CMM via CMMA - disable on hugetlbfs */
+ if (test_bit(S390_FEAT_CMM, model->features)) {
+ if (mem_path) {
+ error_report("Warning: CMM will not be enabled because it is not "
+ "compatible to hugetlbfs.");
+ } else {
+ kvm_s390_enable_cmma();
+ }
+ }
+}
projects / qemu.git / blobdiff