[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] x86: add hypercall to query current underlying pCPU's frequency
I still consider this not a useful or informative operation. -- Keir On 19/9/08 14:10, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote: > Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx> > > Index: 2008-09-19/xen/arch/x86/platform_hypercall.c > =================================================================== > --- 2008-09-19.orig/xen/arch/x86/platform_hypercall.c 2008-09-19 > 14:12:02.000000000 +0200 > +++ 2008-09-19/xen/arch/x86/platform_hypercall.c 2008-09-19 14:12:56.000000000 > +0200 > @@ -21,7 +21,7 @@ > #include <xen/acpi.h> > #include <asm/current.h> > #include <public/platform.h> > -#include <acpi/cpufreq/processor_perf.h> > +#include <acpi/cpufreq/cpufreq.h> > #include <asm/edd.h> > #include <asm/mtrr.h> > #include "cpu/mtrr/mtrr.h" > @@ -55,6 +55,7 @@ static long cpu_frequency_change_helper( > ret_t do_platform_op(XEN_GUEST_HANDLE(xen_platform_op_t) u_xenpf_op) > { > ret_t ret = 0; > + struct vcpu *v; > struct xen_platform_op curop, *op = &curop; > > if ( !IS_PRIV(current->domain) ) > @@ -312,7 +313,6 @@ ret_t do_platform_op(XEN_GUEST_HANDLE(xe > { > uint32_t cpu; > uint64_t idletime, now = NOW(); > - struct vcpu *v; > struct xenctl_cpumap ctlmap; > cpumask_t cpumap; > XEN_GUEST_HANDLE(uint8) cpumap_bitmap; > @@ -482,6 +482,20 @@ ret_t do_platform_op(XEN_GUEST_HANDLE(xe > break; > } > break; > + > + case XENPF_get_cpu_freq: > + if ( op->u.get_cpu_freq.vcpu >= MAX_VIRT_CPUS || > + !(v = current->domain->vcpu[op->u.get_cpu_freq.vcpu]) ) > + { > + ret = -EINVAL; > + break; > + } > + > + op->u.get_cpu_freq.freq = cpufreq_cpu_policy[v->processor] ? > + cpufreq_cpu_policy[v->processor]->cur : 0; > + if ( copy_field_to_guest(u_xenpf_op, op, u.get_cpu_freq.freq) ) > + ret = -EFAULT; > + break; > > default: > ret = -ENOSYS; > Index: 2008-09-19/xen/arch/x86/x86_64/platform_hypercall.c > =================================================================== > --- 2008-09-19.orig/xen/arch/x86/x86_64/platform_hypercall.c 2008-09-19 > 14:12:02.000000000 +0200 > +++ 2008-09-19/xen/arch/x86/x86_64/platform_hypercall.c 2008-09-19 > 13:59:35.000000000 +0200 > @@ -21,6 +21,8 @@ DEFINE_XEN_GUEST_HANDLE(compat_platform_ > #define xen_processor_power_t compat_processor_power_t > #define set_cx_pminfo compat_set_cx_pminfo > > +#define xenpf_get_cpu_freq compat_pf_get_cpu_freq > + > #define xenpf_enter_acpi_sleep compat_pf_enter_acpi_sleep > > #define COMPAT > Index: 2008-09-19/xen/include/public/platform.h > =================================================================== > --- 2008-09-19.orig/xen/include/public/platform.h 2008-09-19 > 14:12:02.000000000 +0200 > +++ 2008-09-19/xen/include/public/platform.h 2008-09-19 13:59:35.000000000 > +0200 > @@ -312,6 +312,16 @@ struct xenpf_set_processor_pminfo { > typedef struct xenpf_set_processor_pminfo xenpf_set_processor_pminfo_t; > DEFINE_XEN_GUEST_HANDLE(xenpf_set_processor_pminfo_t); > > +#define XENPF_get_cpu_freq 55 > +struct xenpf_get_cpu_freq { > + /* IN variables */ > + uint32_t vcpu; > + /* OUT variables */ > + uint32_t freq; /* in kHz */ > +}; > +typedef struct xenpf_get_cpu_freq xenpf_get_cpu_freq_t; > +DEFINE_XEN_GUEST_HANDLE(xenpf_get_cpu_freq_t); > + > struct xen_platform_op { > uint32_t cmd; > uint32_t interface_version; /* XENPF_INTERFACE_VERSION */ > @@ -327,6 +337,7 @@ struct xen_platform_op { > struct xenpf_change_freq change_freq; > struct xenpf_getidletime getidletime; > struct xenpf_set_processor_pminfo set_pminfo; > + struct xenpf_get_cpu_freq get_cpu_freq; > uint8_t pad[128]; > } u; > }; > > > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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