| Message ID | DE8DF0795D48FD4CA783C40EC82923352822BF@SHSMSX101.ccr.corp.intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
Am 02.07.2012 13:08, schrieb Liu, Jinsong: > Eduardo, Jan, Andreas > > As we sync 3 months ago, I wait until qemu1.1 done, then re-write patch based on qemu1.1. > Now it's time to re-write my patch based on qemu1.1. > > Attached is a RFC patch for exposing tsc deadline timer to guest. > I have checked current qemu1.1 code, and read some emails regarding to cpuid exposing these days. > However, I think I may ignore something (so many discussion :-), so if you think anything wrong, please point out to me. No objections or nitpicks from my (CPU) side FWIW. Regards, Andreas > > Thanks, > Jinsong > > ==================== > From 8b5b003f6f8834d2d5d71e18bb47b7f089bc4928 Mon Sep 17 00:00:00 2001 > From: Liu, Jinsong <jinsong.liu@intel.com> > Date: Tue, 3 Jul 2012 02:35:10 +0800 > Subject: [PATCH] Expose tsc deadline timer feature to guest > > This patch exposes tsc deadline timer feature to guest if > 1). in-kernel irqchip is used, and > 2). kvm has emulated tsc deadline timer, and > 3). user authorize the feature exposing via -cpu or +/- tsc-deadline > > Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com> > --- > target-i386/cpu.h | 1 + > target-i386/kvm.c | 5 +++++ > 2 files changed, 6 insertions(+), 0 deletions(-) > > diff --git a/target-i386/cpu.h b/target-i386/cpu.h > index 79cc640..d1a4a04 100644 > --- a/target-i386/cpu.h > +++ b/target-i386/cpu.h > @@ -400,6 +400,7 @@ > #define CPUID_EXT_X2APIC (1 << 21) > #define CPUID_EXT_MOVBE (1 << 22) > #define CPUID_EXT_POPCNT (1 << 23) > +#define CPUID_EXT_TSC_DEADLINE_TIMER (1 << 24) > #define CPUID_EXT_XSAVE (1 << 26) > #define CPUID_EXT_OSXSAVE (1 << 27) > #define CPUID_EXT_HYPERVISOR (1 << 31) > diff --git a/target-i386/kvm.c b/target-i386/kvm.c > index 0d0d8f6..52b577f 100644 > --- a/target-i386/kvm.c > +++ b/target-i386/kvm.c > @@ -361,8 +361,13 @@ int kvm_arch_init_vcpu(CPUX86State *env) > env->cpuid_features &= kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX); > > i = env->cpuid_ext_features & CPUID_EXT_HYPERVISOR; > + j = env->cpuid_ext_features & CPUID_EXT_TSC_DEADLINE_TIMER; > env->cpuid_ext_features &= kvm_arch_get_supported_cpuid(s, 1, 0, R_ECX); > env->cpuid_ext_features |= i; > + if (j && kvm_irqchip_in_kernel() && > + kvm_check_extension(s, KVM_CAP_TSC_DEADLINE_TIMER)) { > + env->cpuid_ext_features |= CPUID_EXT_TSC_DEADLINE_TIMER; > + } > > env->cpuid_ext2_features &= kvm_arch_get_supported_cpuid(s, 0x80000001, > 0, R_EDX);
On Mon, Jul 02, 2012 at 11:08:14AM +0000, Liu, Jinsong wrote: > Eduardo, Jan, Andreas > > As we sync 3 months ago, I wait until qemu1.1 done, then re-write patch based on qemu1.1. > Now it's time to re-write my patch based on qemu1.1. > > Attached is a RFC patch for exposing tsc deadline timer to guest. > I have checked current qemu1.1 code, and read some emails regarding to cpuid exposing these days. > However, I think I may ignore something (so many discussion :-), so if you think anything wrong, please point out to me. Looks good, considering that even if we change the GET_SUPPORTED_CPUID behavior eventually, there are existing kernels that use KVM_CAP_TSC_DEADLINE_TIMER to report TSC-deadline support. So: Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> > > Thanks, > Jinsong > > ==================== > From 8b5b003f6f8834d2d5d71e18bb47b7f089bc4928 Mon Sep 17 00:00:00 2001 > From: Liu, Jinsong <jinsong.liu@intel.com> > Date: Tue, 3 Jul 2012 02:35:10 +0800 > Subject: [PATCH] Expose tsc deadline timer feature to guest > > This patch exposes tsc deadline timer feature to guest if > 1). in-kernel irqchip is used, and > 2). kvm has emulated tsc deadline timer, and > 3). user authorize the feature exposing via -cpu or +/- tsc-deadline > > Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com> > --- > target-i386/cpu.h | 1 + > target-i386/kvm.c | 5 +++++ > 2 files changed, 6 insertions(+), 0 deletions(-) > > diff --git a/target-i386/cpu.h b/target-i386/cpu.h > index 79cc640..d1a4a04 100644 > --- a/target-i386/cpu.h > +++ b/target-i386/cpu.h > @@ -400,6 +400,7 @@ > #define CPUID_EXT_X2APIC (1 << 21) > #define CPUID_EXT_MOVBE (1 << 22) > #define CPUID_EXT_POPCNT (1 << 23) > +#define CPUID_EXT_TSC_DEADLINE_TIMER (1 << 24) > #define CPUID_EXT_XSAVE (1 << 26) > #define CPUID_EXT_OSXSAVE (1 << 27) > #define CPUID_EXT_HYPERVISOR (1 << 31) > diff --git a/target-i386/kvm.c b/target-i386/kvm.c > index 0d0d8f6..52b577f 100644 > --- a/target-i386/kvm.c > +++ b/target-i386/kvm.c > @@ -361,8 +361,13 @@ int kvm_arch_init_vcpu(CPUX86State *env) > env->cpuid_features &= kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX); > > i = env->cpuid_ext_features & CPUID_EXT_HYPERVISOR; > + j = env->cpuid_ext_features & CPUID_EXT_TSC_DEADLINE_TIMER; > env->cpuid_ext_features &= kvm_arch_get_supported_cpuid(s, 1, 0, R_ECX); > env->cpuid_ext_features |= i; > + if (j && kvm_irqchip_in_kernel() && > + kvm_check_extension(s, KVM_CAP_TSC_DEADLINE_TIMER)) { > + env->cpuid_ext_features |= CPUID_EXT_TSC_DEADLINE_TIMER; > + } > > env->cpuid_ext2_features &= kvm_arch_get_supported_cpuid(s, 0x80000001, > 0, R_EDX); > -- > 1.7.1
On 2012-07-02 13:08, Liu, Jinsong wrote: > Eduardo, Jan, Andreas > > As we sync 3 months ago, I wait until qemu1.1 done, then re-write patch based on qemu1.1. > Now it's time to re-write my patch based on qemu1.1. > > Attached is a RFC patch for exposing tsc deadline timer to guest. > I have checked current qemu1.1 code, and read some emails regarding to cpuid exposing these days. > However, I think I may ignore something (so many discussion :-), so if you think anything wrong, please point out to me. > > Thanks, > Jinsong > > ==================== >>From 8b5b003f6f8834d2d5d71e18bb47b7f089bc4928 Mon Sep 17 00:00:00 2001 > From: Liu, Jinsong <jinsong.liu@intel.com> > Date: Tue, 3 Jul 2012 02:35:10 +0800 > Subject: [PATCH] Expose tsc deadline timer feature to guest > > This patch exposes tsc deadline timer feature to guest if > 1). in-kernel irqchip is used, and > 2). kvm has emulated tsc deadline timer, and > 3). user authorize the feature exposing via -cpu or +/- tsc-deadline > > Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com> > --- > target-i386/cpu.h | 1 + > target-i386/kvm.c | 5 +++++ > 2 files changed, 6 insertions(+), 0 deletions(-) > > diff --git a/target-i386/cpu.h b/target-i386/cpu.h > index 79cc640..d1a4a04 100644 > --- a/target-i386/cpu.h > +++ b/target-i386/cpu.h > @@ -400,6 +400,7 @@ > #define CPUID_EXT_X2APIC (1 << 21) > #define CPUID_EXT_MOVBE (1 << 22) > #define CPUID_EXT_POPCNT (1 << 23) > +#define CPUID_EXT_TSC_DEADLINE_TIMER (1 << 24) > #define CPUID_EXT_XSAVE (1 << 26) > #define CPUID_EXT_OSXSAVE (1 << 27) > #define CPUID_EXT_HYPERVISOR (1 << 31) > diff --git a/target-i386/kvm.c b/target-i386/kvm.c > index 0d0d8f6..52b577f 100644 > --- a/target-i386/kvm.c > +++ b/target-i386/kvm.c > @@ -361,8 +361,13 @@ int kvm_arch_init_vcpu(CPUX86State *env) > env->cpuid_features &= kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX); > > i = env->cpuid_ext_features & CPUID_EXT_HYPERVISOR; > + j = env->cpuid_ext_features & CPUID_EXT_TSC_DEADLINE_TIMER; > env->cpuid_ext_features &= kvm_arch_get_supported_cpuid(s, 1, 0, R_ECX); > env->cpuid_ext_features |= i; > + if (j && kvm_irqchip_in_kernel() && > + kvm_check_extension(s, KVM_CAP_TSC_DEADLINE_TIMER)) { > + env->cpuid_ext_features |= CPUID_EXT_TSC_DEADLINE_TIMER; > + } > > env->cpuid_ext2_features &= kvm_arch_get_supported_cpuid(s, 0x80000001, > 0, R_EDX); > Fine with me. Acked-by: Jan Kiszka <jan.kiszka@siemens.com> Jan
On Mon, Jul 02, 2012 at 11:08:14AM +0000, Liu, Jinsong wrote: > Eduardo, Jan, Andreas > > As we sync 3 months ago, I wait until qemu1.1 done, then re-write patch based on qemu1.1. > Now it's time to re-write my patch based on qemu1.1. > > Attached is a RFC patch for exposing tsc deadline timer to guest. > I have checked current qemu1.1 code, and read some emails regarding to cpuid exposing these days. > However, I think I may ignore something (so many discussion :-), so if you think anything wrong, please point out to me. > > Thanks, > Jinsong Applied, thanks. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
==================== From 8b5b003f6f8834d2d5d71e18bb47b7f089bc4928 Mon Sep 17 00:00:00 2001 From: Liu, Jinsong <jinsong.liu@intel.com> Date: Tue, 3 Jul 2012 02:35:10 +0800 Subject: [PATCH] Expose tsc deadline timer feature to guest This patch exposes tsc deadline timer feature to guest if 1). in-kernel irqchip is used, and 2). kvm has emulated tsc deadline timer, and 3). user authorize the feature exposing via -cpu or +/- tsc-deadline Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com> --- target-i386/cpu.h | 1 + target-i386/kvm.c | 5 +++++ 2 files changed, 6 insertions(+), 0 deletions(-) diff --git a/target-i386/cpu.h b/target-i386/cpu.h index 79cc640..d1a4a04 100644 --- a/target-i386/cpu.h +++ b/target-i386/cpu.h @@ -400,6 +400,7 @@ #define CPUID_EXT_X2APIC (1 << 21) #define CPUID_EXT_MOVBE (1 << 22) #define CPUID_EXT_POPCNT (1 << 23) +#define CPUID_EXT_TSC_DEADLINE_TIMER (1 << 24) #define CPUID_EXT_XSAVE (1 << 26) #define CPUID_EXT_OSXSAVE (1 << 27) #define CPUID_EXT_HYPERVISOR (1 << 31) diff --git a/target-i386/kvm.c b/target-i386/kvm.c index 0d0d8f6..52b577f 100644 --- a/target-i386/kvm.c +++ b/target-i386/kvm.c @@ -361,8 +361,13 @@ int kvm_arch_init_vcpu(CPUX86State *env) env->cpuid_features &= kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX); i = env->cpuid_ext_features & CPUID_EXT_HYPERVISOR; + j = env->cpuid_ext_features & CPUID_EXT_TSC_DEADLINE_TIMER; env->cpuid_ext_features &= kvm_arch_get_supported_cpuid(s, 1, 0, R_ECX); env->cpuid_ext_features |= i; + if (j && kvm_irqchip_in_kernel() && + kvm_check_extension(s, KVM_CAP_TSC_DEADLINE_TIMER)) { + env->cpuid_ext_features |= CPUID_EXT_TSC_DEADLINE_TIMER; + } env->cpuid_ext2_features &= kvm_arch_get_supported_cpuid(s, 0x80000001, 0, R_EDX);