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[Qemu-devel] [PATCH v1 5/5] i386: add CPUID.1F to cpuid_data with host_c
From: |
Like Xu |
Subject: |
[Qemu-devel] [PATCH v1 5/5] i386: add CPUID.1F to cpuid_data with host_cpuid check |
Date: |
Mon, 14 Jan 2019 20:24:59 +0800 |
When cs->nr_dies is larger than 1, the CPUID.1F should be generated
and is added to cpuid_data.entries for guest awareness. This patch
provides a return option in kvm_has_cpuid_1f for default choice.
Signed-off-by: Like Xu <address@hidden>
---
target/i386/kvm.c | 34 +++++++++++++++++++++++++++++++++-
target/i386/kvm_i386.h | 1 +
2 files changed, 34 insertions(+), 1 deletion(-)
diff --git a/target/i386/kvm.c b/target/i386/kvm.c
index 739cf8c..eb0d1ee 100644
--- a/target/i386/kvm.c
+++ b/target/i386/kvm.c
@@ -120,6 +120,17 @@ bool kvm_has_smm(void)
return kvm_check_extension(kvm_state, KVM_CAP_X86_SMM);
}
+bool kvm_has_cpuid_1f(void)
+{
+ uint32_t eax = 0x1f, ecx = 1, ebx = 0, edx = 0;
+ host_cpuid(0x1f, 0, &eax, &ebx, &ecx, &edx);
+ if (eax != 0) {
+ printf("It's recommended to disable CPUID.1F emulation \
+ on Intel non-MCP platform.\n");
+ }
+ return true;
+}
+
bool kvm_has_adjust_clock_stable(void)
{
int ret = kvm_check_extension(kvm_state, KVM_CAP_ADJUST_CLOCK);
@@ -1035,7 +1046,6 @@ int kvm_arch_init_vcpu(CPUState *cs)
}
cpu_x86_cpuid(env, 0, 0, &limit, &unused, &unused, &unused);
-
for (i = 0; i <= limit; i++) {
if (cpuid_i == KVM_MAX_CPUID_ENTRIES) {
fprintf(stderr, "unsupported level value: 0x%x\n", limit);
@@ -1127,6 +1137,28 @@ int kvm_arch_init_vcpu(CPUState *cs)
}
}
+ cpu->enable_cpuid_0x1f = kvm_has_cpuid_1f();
+ if (cs->nr_dies > 1) {
+ i = 0x1f;
+ for (j = 0; ; j++) {
+ c->function = i;
+ c->flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX;
+ c->index = j;
+ cpu_x86_cpuid(env, i, j, &c->eax, &c->ebx, &c->ecx, &c->edx);
+ if (i == 0x1f && j == 3) {
+ break;
+ }
+ if (cpuid_i == KVM_MAX_CPUID_ENTRIES) {
+ fprintf(stderr, "cpuid_data is full, no space for "
+ "cpuid(eax:0x%x,ecx:0x%x)\n", i, j);
+ abort();
+ }
+ c = &cpuid_data.entries[cpuid_i++];
+ if (!cpu->enable_cpuid_0x1f)
+ break;
+ }
+ }
+
if (limit >= 0x0a) {
uint32_t eax, edx;
diff --git a/target/i386/kvm_i386.h b/target/i386/kvm_i386.h
index 3057ba4..ef9d41e 100644
--- a/target/i386/kvm_i386.h
+++ b/target/i386/kvm_i386.h
@@ -38,6 +38,7 @@ bool kvm_has_adjust_clock_stable(void);
void kvm_synchronize_all_tsc(void);
void kvm_arch_reset_vcpu(X86CPU *cs);
void kvm_arch_do_init_vcpu(X86CPU *cs);
+bool kvm_has_cpuid_1f(void);
int kvm_device_pci_assign(KVMState *s, PCIHostDeviceAddress *dev_addr,
uint32_t flags, uint32_t *dev_id);
--
1.8.3.1
- Re: [Qemu-devel] [PATCH v1 2/5] vl.c: add -smp, dies=* command line support, (continued)
- Re: [Qemu-devel] [PATCH v1 2/5] vl.c: add -smp, dies=* command line support, Eduardo Habkost, 2019/01/14
- Re: [Qemu-devel] [PATCH v1 2/5] vl.c: add -smp, dies=* command line support, Xu, Like, 2019/01/14
- Re: [Qemu-devel] [PATCH v1 2/5] vl.c: add -smp, dies=* command line support, Daniel P . Berrangé, 2019/01/16
- Re: [Qemu-devel] [PATCH v1 2/5] vl.c: add -smp, dies=* command line support, Like Xu, 2019/01/16
- Re: [Qemu-devel] [PATCH v1 2/5] vl.c: add -smp, dies=* command line support, Daniel P . Berrangé, 2019/01/17
[Qemu-devel] [PATCH v1 3/5] i386: extend x86_apicid_* functions for smp_dies support, Like Xu, 2019/01/13
[Qemu-devel] [PATCH v1 1/5] cpu: introduce die, the new cpu toppolgy emulation level, Like Xu, 2019/01/13
[Qemu-devel] [PATCH v1 4/5] i386: enable CPUID.1F leaf generation based on spec, Like Xu, 2019/01/13
[Qemu-devel] [PATCH v1 5/5] i386: add CPUID.1F to cpuid_data with host_cpuid check,
Like Xu <=
Re: [Qemu-devel] [PATCH v1 0/5] Introduce cpu die topology and enable CPUID.1F for i386, Igor Mammedov, 2019/01/17