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Date: Fri, 17 Apr 2009 15:38:45 +0800
From: Huang Ying <ying.huang@...el.com>
To: Avi Kivity <avi@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
Andi Kleen <andi@...stfloor.org>
Subject: [PATCH -v2 2/2] kvm userspace: Add MCE simulation to kvm
- MCE features are initialized when VCPU is initialized according to CPUID.
- A monitor command "mce" is added to inject a MCE.
ChangeLog:
v2:
- Use new kernel MCE capability exportion interface.
Signed-off-by: Huang Ying <ying.huang@...el.com>
---
libkvm/libkvm-x86.c | 33 +++++++++++++++++++++++++++++++++
libkvm/libkvm.h | 4 ++++
qemu/monitor.c | 26 ++++++++++++++++++++++++++
qemu/qemu-kvm-x86.c | 33 +++++++++++++++++++++++++++++++++
qemu/qemu-kvm.c | 26 ++++++++++++++++++++++++++
qemu/qemu-kvm.h | 4 ++++
qemu/target-i386/cpu.h | 3 +++
7 files changed, 129 insertions(+)
--- a/qemu/monitor.c
+++ b/qemu/monitor.c
@@ -1557,6 +1557,31 @@ static void do_info_status(Monitor *mon)
}
+#if defined(TARGET_I386) || defined(TARGET_X86_64)
+static void do_inject_mce(Monitor *mon,
+ int cpu_index, int bank,
+ unsigned status_hi, unsigned status_lo,
+ unsigned mcg_status_hi, unsigned mcg_status_lo,
+ unsigned addr_hi, unsigned addr_lo,
+ unsigned misc_hi, unsigned misc_lo)
+{
+ CPUState *env;
+ struct kvm_x86_mce mce = {
+ .bank = bank,
+ .status = ((uint64_t)status_hi << 32) | status_lo,
+ .mcg_status = ((uint64_t)mcg_status_hi << 32) | mcg_status_lo,
+ .addr = ((uint64_t)addr_hi << 32) | addr_lo,
+ .misc = ((uint64_t)misc_hi << 32) | misc_lo,
+ };
+
+ for (env = first_cpu; env != NULL; env = env->next_cpu)
+ if (env->cpu_index == cpu_index && env->mcg_cap) {
+ kvm_inject_x86_mce(env, &mce);
+ break;
+ }
+}
+#endif
+
static void do_balloon(Monitor *mon, int value)
{
ram_addr_t target = value;
@@ -1758,6 +1783,7 @@ static const mon_cmd_t mon_cmds[] = {
"[tap,user,socket,vde] options", "add host VLAN client" },
{ "host_net_remove", "is", net_host_device_remove,
"vlan_id name", "remove host VLAN client" },
+ { "mce", "iillll", do_inject_mce, "cpu bank status mcgstatus addr misc", "inject a MCE on the given CPU"},
#endif
{ "balloon", "i", do_balloon,
"target", "request VM to change it's memory allocation (in MB)" },
--- a/libkvm/libkvm-x86.c
+++ b/libkvm/libkvm-x86.c
@@ -379,6 +379,39 @@ int kvm_set_msrs(kvm_context_t kvm, int
return r;
}
+int kvm_get_mce_cap_supported(kvm_context_t kvm, uint64_t *mce_cap,
+ int *max_banks)
+{
+ int r;
+
+ r = ioctl(kvm->fd, KVM_CHECK_EXTENSION, KVM_CAP_MCE);
+ if (r > 0) {
+ *max_banks = r;
+ return ioctl(kvm->fd, KVM_X86_GET_MCE_CAP_SUPPORTED, mce_cap);
+ }
+ return -ENOSYS;
+}
+
+int kvm_setup_mce(kvm_context_t kvm, int vcpu, uint64_t *mcg_cap)
+{
+ int r;
+
+ r = ioctl(kvm->fd, KVM_CHECK_EXTENSION, KVM_CAP_MCE);
+ if (r > 0)
+ return ioctl(kvm->vcpu_fd[vcpu], KVM_X86_SETUP_MCE, mcg_cap);
+ return -ENOSYS;
+}
+
+int kvm_set_mce(kvm_context_t kvm, int vcpu, struct kvm_x86_mce *m)
+{
+ int r;
+
+ r = ioctl(kvm->fd, KVM_CHECK_EXTENSION, KVM_CAP_MCE);
+ if (r > 0)
+ return ioctl(kvm->vcpu_fd[vcpu], KVM_X86_SET_MCE, m);
+ return -ENOSYS;
+}
+
static void print_seg(FILE *file, const char *name, struct kvm_segment *seg)
{
fprintf(stderr,
--- a/libkvm/libkvm.h
+++ b/libkvm/libkvm.h
@@ -27,6 +27,10 @@ typedef struct kvm_context *kvm_context_
struct kvm_msr_list *kvm_get_msr_list(kvm_context_t);
int kvm_get_msrs(kvm_context_t, int vcpu, struct kvm_msr_entry *msrs, int n);
int kvm_set_msrs(kvm_context_t, int vcpu, struct kvm_msr_entry *msrs, int n);
+int kvm_get_mce_cap_supported(kvm_context_t, uint64_t *mce_cap, int *max_banks);
+int kvm_setup_mce(kvm_context_t, int vcpu, uint64_t *mcg_cap);
+struct kvm_x86_mce;
+int kvm_set_mce(kvm_context_t, int vcpu, struct kvm_x86_mce *mce);
#endif
/*!
--- a/qemu/qemu-kvm-x86.c
+++ b/qemu/qemu-kvm-x86.c
@@ -457,6 +457,15 @@ void kvm_arch_save_regs(CPUState *env)
}
}
+void kvm_arch_inject_x86_mce(CPUState *env, struct kvm_x86_mce *mce)
+{
+ int rc;
+
+ rc = kvm_set_mce(kvm_context, env->cpu_index, mce);
+ if (rc < 0)
+ perror("kvm_set_mce FAILED");
+}
+
static void do_cpuid_ent(struct kvm_cpuid_entry2 *e, uint32_t function,
uint32_t count, CPUState *env)
{
@@ -566,6 +575,30 @@ int kvm_arch_qemu_init_env(CPUState *cen
do_cpuid_ent(&cpuid_ent[cpuid_nent++], i, 0, ©);
kvm_setup_cpuid2(kvm_context, cenv->cpu_index, cpuid_nent, cpuid_ent);
+
+ if (((cenv->cpuid_version >> 8)&0xF) >= 6
+ && (cenv->cpuid_features&(CPUID_MCE|CPUID_MCA)) == (CPUID_MCE|CPUID_MCA)
+ && kvm_check_extension(kvm_context, KVM_CAP_MCE) > 0) {
+ uint64_t mcg_cap;
+ int banks;
+
+#define MCE_CAP_DEF 0x100
+#define MCE_BANKS_DEF 4
+
+ if (kvm_get_mce_cap_supported(kvm_context, &mcg_cap, &banks))
+ perror("kvm_get_mce_cap_supported FAILED");
+ else {
+ if (banks > MCE_BANKS_DEF)
+ banks = MCE_BANKS_DEF;
+ mcg_cap &= MCE_CAP_DEF;
+ mcg_cap |= banks;
+ if (kvm_setup_mce(kvm_context, cenv->cpu_index, &mcg_cap))
+ perror("kvm_setup_mce FAILED");
+ else
+ cenv->mcg_cap = mcg_cap;
+ }
+ }
+
return 0;
}
--- a/qemu/qemu-kvm.h
+++ b/qemu/qemu-kvm.h
@@ -74,6 +74,8 @@ int kvm_arch_try_push_interrupts(void *o
void kvm_arch_push_nmi(void *opaque);
void kvm_arch_update_regs_for_sipi(CPUState *env);
void kvm_arch_cpu_reset(CPUState *env);
+struct kvm_x86_mce;
+void kvm_arch_inject_x86_mce(CPUState *env, struct kvm_x86_mce *mce);
struct kvm_guest_debug;
struct kvm_debug_exit_arch;
@@ -233,4 +235,6 @@ static inline void cpu_synchronize_state
}
}
+void kvm_inject_x86_mce(CPUState *env, struct kvm_x86_mce *mce);
+
#endif
--- a/qemu/qemu-kvm.c
+++ b/qemu/qemu-kvm.c
@@ -198,6 +198,32 @@ void kvm_save_registers(CPUState *env)
on_vcpu(env, kvm_do_save_registers, env);
}
+#if defined(TARGET_I386) || defined(TARGET_X86_64)
+struct kvm_x86_mce_data
+{
+ CPUState *env;
+ struct kvm_x86_mce *mce;
+};
+
+static void kvm_do_inject_x86_mce(void *_data)
+{
+ struct kvm_x86_mce_data *data = _data;
+
+ kvm_arch_inject_x86_mce(data->env, data->mce);
+}
+
+void kvm_inject_x86_mce(CPUState *env, struct kvm_x86_mce *mce)
+{
+ struct kvm_x86_mce_data data;
+
+ if (kvm_enabled()) {
+ data.env = env;
+ data.mce = mce;
+ on_vcpu(env, kvm_do_inject_x86_mce, &data);
+ }
+}
+#endif
+
int kvm_cpu_exec(CPUState *env)
{
int r;
--- a/qemu/target-i386/cpu.h
+++ b/qemu/target-i386/cpu.h
@@ -661,6 +661,9 @@ typedef struct CPUX86State {
uint64_t mask;
} mtrr_var[8];
+ /* MCE capability */
+ uint64_t mcg_cap;
+
#ifdef USE_KQEMU
int kqemu_enabled;
int last_io_time;
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