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kvm clock - userspace with patches

PATCH In review Glauber de Oliveira Costa 2 participants 4 messages Jan 15, 2008 – Jan 20, 2008 3 messages not in the archive KVM

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#2 lore raw

PATCH 1/2 include kvm_para.h

have qemu-kvm to include kvm_para, allowing access to paravirt definitions

Signed-off-by Glauber de Oliveira Costa <[email protected]>
---
 qemu/qemu-kvm-x86.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
qemu/qemu-kvm-x86.c +1 -0
index c79ca36..21ec112 100644
@@ -14,6 +14,7 @@ extern int kvm_irqchip;
 #include <libkvm.h>
 #include <pthread.h>
 #include <sys/utsname.h>
+#include <linux/kvm_para.h>
 
 #define MSR_IA32_TSC		0x10
Signature · 7 lines
1.5.0.6


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#4 lore raw

PATCH 2/2 fill cpuid with clocksource information

In this patch, we probe the host checking for clocksource capabilities. In case it is found, it is advertised to the guest through the appropriate cpuid mechanism

Signed-off-by Glauber de Oliveira Costa <[email protected]>
---
 qemu/qemu-kvm-x86.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
qemu/qemu-kvm-x86.c +6 -1
index 21ec112..6b11f02 100644
@@ -517,6 +517,11 @@ int kvm_arch_qemu_init_env(CPUState *cenv)
     int cpuid_nent = 0;
     CPUState copy;
     uint32_t i, limit;
+    int clocksource_feature = 0;
+#ifdef KVM_CAP_CLOCKSOURCE
+    clocksource_feature = kvm_check_extension(kvm_context, KVM_CAP_CLOCKSOURCE);
+    clocksource_feature <<= KVM_FEATURE_CLOCKSOURCE; 
+#endif
 
     copy = *cenv;
 

@@ -534,7 +539,7 @@ int kvm_arch_qemu_init_env(CPUState *cenv)
     pv_ent = &cpuid_ent[cpuid_nent++];
     memset(pv_ent, 0, sizeof(*pv_ent));
     pv_ent->function = KVM_CPUID_FEATURES;
-    pv_ent->eax = 0;
+    pv_ent->eax = clocksource_feature;
 #endif
 
     copy.regs[R_EAX] = 0;
Signature · 7 lines
1.5.0.6


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#6 lore raw

Re: [PATCH 2/2] fill cpuid with clocksource information

Quoted 14 lines · Glauber de Oliveira Costa

In this patch, we probe the host checking for clocksource capabilities. In case it is found, it is advertised to the guest through the appropriate cpuid mechanism

Signed-off-by Glauber de Oliveira Costa <[email protected]>
---
 qemu/qemu-kvm-x86.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
qemu/qemu-kvm-x86.c +0 -0
index 21ec112..6b11f02 100644

qemu/qemu-kvm-x86.c int kvm_arch_qemu_init_env(CPUState *cenv) · line 525

Quoted 9 lines
qemu/qemu-kvm-x86.c +5 -0
@@ -517,6 +517,11 @@ int kvm_arch_qemu_init_env(CPUState *cenv)
     int cpuid_nent = 0;
     CPUState copy;
     uint32_t i, limit;
+    int clocksource_feature = 0;
+#ifdef KVM_CAP_CLOCKSOURCE
+    clocksource_feature = kvm_check_extension(kvm_context, KVM_CAP_CLOCKSOURCE);
+    clocksource_feature <<= KVM_FEATURE_CLOCKSOURCE; 
+#endif

There is no reason to be tricky here.

Signature · 7 lines
error compiling committee.c: too many arguments to function


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