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Diffstat (limited to 'target-i386/kvm.c')
-rw-r--r--target-i386/kvm.c104
1 files changed, 78 insertions, 26 deletions
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index ab65a6ebe5..d6f5355aa9 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -532,6 +532,36 @@ static bool hyperv_enabled(X86CPU *cpu)
cpu->hyperv_stimer);
}
+static int kvm_arch_set_tsc_khz(CPUState *cs)
+{
+ X86CPU *cpu = X86_CPU(cs);
+ CPUX86State *env = &cpu->env;
+ int r;
+
+ if (!env->tsc_khz) {
+ return 0;
+ }
+
+ r = kvm_check_extension(cs->kvm_state, KVM_CAP_TSC_CONTROL) ?
+ kvm_vcpu_ioctl(cs, KVM_SET_TSC_KHZ, env->tsc_khz) :
+ -ENOTSUP;
+ if (r < 0) {
+ /* When KVM_SET_TSC_KHZ fails, it's an error only if the current
+ * TSC frequency doesn't match the one we want.
+ */
+ int cur_freq = kvm_check_extension(cs->kvm_state, KVM_CAP_GET_TSC_KHZ) ?
+ kvm_vcpu_ioctl(cs, KVM_GET_TSC_KHZ) :
+ -ENOTSUP;
+ if (cur_freq <= 0 || cur_freq != env->tsc_khz) {
+ error_report("warning: TSC frequency mismatch between "
+ "VM and host, and TSC scaling unavailable");
+ return r;
+ }
+ }
+
+ return 0;
+}
+
static Error *invtsc_mig_blocker;
#define KVM_MAX_CPUID_ENTRIES 100
@@ -859,12 +889,22 @@ int kvm_arch_init_vcpu(CPUState *cs)
return r;
}
- r = kvm_check_extension(cs->kvm_state, KVM_CAP_TSC_CONTROL);
- if (r && env->tsc_khz) {
- r = kvm_vcpu_ioctl(cs, KVM_SET_TSC_KHZ, env->tsc_khz);
- if (r < 0) {
- fprintf(stderr, "KVM_SET_TSC_KHZ failed\n");
- return r;
+ r = kvm_arch_set_tsc_khz(cs);
+ if (r < 0) {
+ return r;
+ }
+
+ /* vcpu's TSC frequency is either specified by user, or following
+ * the value used by KVM if the former is not present. In the
+ * latter case, we query it from KVM and record in env->tsc_khz,
+ * so that vcpu's TSC frequency can be migrated later via this field.
+ */
+ if (!env->tsc_khz) {
+ r = kvm_check_extension(cs->kvm_state, KVM_CAP_GET_TSC_KHZ) ?
+ kvm_vcpu_ioctl(cs, KVM_GET_TSC_KHZ) :
+ -ENOTSUP;
+ if (r > 0) {
+ env->tsc_khz = r;
}
}
@@ -1237,8 +1277,8 @@ static int kvm_put_fpu(X86CPU *cpu)
}
memcpy(fpu.fpr, env->fpregs, sizeof env->fpregs);
for (i = 0; i < CPU_NB_REGS; i++) {
- stq_p(&fpu.xmm[i][0], env->xmm_regs[i].XMM_Q(0));
- stq_p(&fpu.xmm[i][8], env->xmm_regs[i].XMM_Q(1));
+ stq_p(&fpu.xmm[i][0], env->xmm_regs[i].ZMM_Q(0));
+ stq_p(&fpu.xmm[i][8], env->xmm_regs[i].ZMM_Q(1));
}
fpu.mxcsr = env->mxcsr;
@@ -1259,6 +1299,7 @@ static int kvm_put_fpu(X86CPU *cpu)
#define XSAVE_OPMASK 272
#define XSAVE_ZMM_Hi256 288
#define XSAVE_Hi16_ZMM 416
+#define XSAVE_PKRU 672
static int kvm_put_xsave(X86CPU *cpu)
{
@@ -1299,19 +1340,20 @@ static int kvm_put_xsave(X86CPU *cpu)
ymmh = (uint8_t *)&xsave->region[XSAVE_YMMH_SPACE];
zmmh = (uint8_t *)&xsave->region[XSAVE_ZMM_Hi256];
for (i = 0; i < CPU_NB_REGS; i++, xmm += 16, ymmh += 16, zmmh += 32) {
- stq_p(xmm, env->xmm_regs[i].XMM_Q(0));
- stq_p(xmm+8, env->xmm_regs[i].XMM_Q(1));
- stq_p(ymmh, env->xmm_regs[i].XMM_Q(2));
- stq_p(ymmh+8, env->xmm_regs[i].XMM_Q(3));
- stq_p(zmmh, env->xmm_regs[i].XMM_Q(4));
- stq_p(zmmh+8, env->xmm_regs[i].XMM_Q(5));
- stq_p(zmmh+16, env->xmm_regs[i].XMM_Q(6));
- stq_p(zmmh+24, env->xmm_regs[i].XMM_Q(7));
+ stq_p(xmm, env->xmm_regs[i].ZMM_Q(0));
+ stq_p(xmm+8, env->xmm_regs[i].ZMM_Q(1));
+ stq_p(ymmh, env->xmm_regs[i].ZMM_Q(2));
+ stq_p(ymmh+8, env->xmm_regs[i].ZMM_Q(3));
+ stq_p(zmmh, env->xmm_regs[i].ZMM_Q(4));
+ stq_p(zmmh+8, env->xmm_regs[i].ZMM_Q(5));
+ stq_p(zmmh+16, env->xmm_regs[i].ZMM_Q(6));
+ stq_p(zmmh+24, env->xmm_regs[i].ZMM_Q(7));
}
#ifdef TARGET_X86_64
memcpy(&xsave->region[XSAVE_Hi16_ZMM], &env->xmm_regs[16],
16 * sizeof env->xmm_regs[16]);
+ memcpy(&xsave->region[XSAVE_PKRU], &env->pkru, sizeof env->pkru);
#endif
r = kvm_vcpu_ioctl(CPU(cpu), KVM_SET_XSAVE, xsave);
return r;
@@ -1665,8 +1707,8 @@ static int kvm_get_fpu(X86CPU *cpu)
}
memcpy(env->fpregs, fpu.fpr, sizeof env->fpregs);
for (i = 0; i < CPU_NB_REGS; i++) {
- env->xmm_regs[i].XMM_Q(0) = ldq_p(&fpu.xmm[i][0]);
- env->xmm_regs[i].XMM_Q(1) = ldq_p(&fpu.xmm[i][8]);
+ env->xmm_regs[i].ZMM_Q(0) = ldq_p(&fpu.xmm[i][0]);
+ env->xmm_regs[i].ZMM_Q(1) = ldq_p(&fpu.xmm[i][8]);
}
env->mxcsr = fpu.mxcsr;
@@ -1717,19 +1759,20 @@ static int kvm_get_xsave(X86CPU *cpu)
ymmh = (const uint8_t *)&xsave->region[XSAVE_YMMH_SPACE];
zmmh = (const uint8_t *)&xsave->region[XSAVE_ZMM_Hi256];
for (i = 0; i < CPU_NB_REGS; i++, xmm += 16, ymmh += 16, zmmh += 32) {
- env->xmm_regs[i].XMM_Q(0) = ldq_p(xmm);
- env->xmm_regs[i].XMM_Q(1) = ldq_p(xmm+8);
- env->xmm_regs[i].XMM_Q(2) = ldq_p(ymmh);
- env->xmm_regs[i].XMM_Q(3) = ldq_p(ymmh+8);
- env->xmm_regs[i].XMM_Q(4) = ldq_p(zmmh);
- env->xmm_regs[i].XMM_Q(5) = ldq_p(zmmh+8);
- env->xmm_regs[i].XMM_Q(6) = ldq_p(zmmh+16);
- env->xmm_regs[i].XMM_Q(7) = ldq_p(zmmh+24);
+ env->xmm_regs[i].ZMM_Q(0) = ldq_p(xmm);
+ env->xmm_regs[i].ZMM_Q(1) = ldq_p(xmm+8);
+ env->xmm_regs[i].ZMM_Q(2) = ldq_p(ymmh);
+ env->xmm_regs[i].ZMM_Q(3) = ldq_p(ymmh+8);
+ env->xmm_regs[i].ZMM_Q(4) = ldq_p(zmmh);
+ env->xmm_regs[i].ZMM_Q(5) = ldq_p(zmmh+8);
+ env->xmm_regs[i].ZMM_Q(6) = ldq_p(zmmh+16);
+ env->xmm_regs[i].ZMM_Q(7) = ldq_p(zmmh+24);
}
#ifdef TARGET_X86_64
memcpy(&env->xmm_regs[16], &xsave->region[XSAVE_Hi16_ZMM],
16 * sizeof env->xmm_regs[16]);
+ memcpy(&env->pkru, &xsave->region[XSAVE_PKRU], sizeof env->pkru);
#endif
return 0;
}
@@ -2467,6 +2510,15 @@ int kvm_arch_put_registers(CPUState *cpu, int level)
}
}
+ if (level == KVM_PUT_FULL_STATE) {
+ /* We don't check for kvm_arch_set_tsc_khz() errors here,
+ * because TSC frequency mismatch shouldn't abort migration,
+ * unless the user explicitly asked for a more strict TSC
+ * setting (e.g. using an explicit "tsc-freq" option).
+ */
+ kvm_arch_set_tsc_khz(cpu);
+ }
+
ret = kvm_getput_regs(x86_cpu, 1);
if (ret < 0) {
return ret;
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2025-04-25 11:06:23 +0200