From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: Haozhong Zhang <haozhong.zhang@intel.com>,
xen-devel@lists.xen.org, Jan Beulich <jbeulich@suse.com>,
Kevin Tian <kevin.tian@intel.com>
Cc: Jun Nakajima <jun.nakajima@intel.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Keir Fraser <keir@xen.org>,
Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>,
Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Subject: Re: [PATCH v5 1/6] x86/hvm: Collect information of TSC scaling ratio
Date: Tue, 23 Feb 2016 09:00:20 -0500 [thread overview]
Message-ID: <56CC65F4.4070803@oracle.com> (raw)
In-Reply-To: <1456193104-12761-2-git-send-email-haozhong.zhang@intel.com>
On 02/22/2016 09:04 PM, Haozhong Zhang wrote:
>
> + if ( cpu_has_tsc_ratio )
> + svm_function_table.tsc_scaling.ratio_frac_bits = 32;
> +
>
> +#define hvm_tsc_scaling_supported \
> + (!!hvm_funcs.tsc_scaling.ratio_frac_bits)
> +
What is the difference (in usage) between cpu_has_tsc_ratio and
hvm_tsc_scaling_supported? Isn't the first imply the second (and if yes
then what's the reason for having the latter)?
-boris
next prev parent reply other threads:[~2016-02-23 14:00 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-23 2:04 [PATCH v5 0/6] Add VMX TSC scaling support Haozhong Zhang
2016-02-23 2:04 ` [PATCH v5 1/6] x86/hvm: Collect information of TSC scaling ratio Haozhong Zhang
2016-02-23 14:00 ` Boris Ostrovsky [this message]
2016-02-23 14:10 ` Jan Beulich
2016-02-23 14:16 ` Boris Ostrovsky
2016-02-23 15:37 ` Jan Beulich
2016-02-24 6:00 ` Haozhong Zhang
2016-02-24 13:46 ` Haozhong Zhang
2016-02-24 14:49 ` Boris Ostrovsky
2016-02-24 14:36 ` Jan Beulich
2016-02-24 15:03 ` Haozhong Zhang
2016-02-26 4:27 ` Tian, Kevin
2016-02-23 2:05 ` [PATCH v5 2/6] x86/hvm: Setup " Haozhong Zhang
2016-02-24 15:01 ` Jan Beulich
2016-02-24 15:42 ` Haozhong Zhang
2016-02-24 15:51 ` Jan Beulich
2016-02-24 16:05 ` Haozhong Zhang
2016-02-23 2:05 ` [PATCH v5 3/6] x86/hvm: Replace architecture TSC scaling by a common function Haozhong Zhang
2016-02-24 15:07 ` Jan Beulich
2016-02-26 4:30 ` Tian, Kevin
2016-02-23 2:05 ` [PATCH v5 4/6] x86/hvm: Move saving/loading vcpu's TSC to common code Haozhong Zhang
2016-02-23 2:05 ` [PATCH v5 5/6] vmx: Add VMX RDTSC(P) scaling support Haozhong Zhang
2016-02-24 15:09 ` Jan Beulich
2016-02-26 4:31 ` Tian, Kevin
2016-02-23 2:05 ` [PATCH v5 6/6] docs: Add descriptions of TSC scaling in xl.cfg and tscmode.txt Haozhong Zhang
2016-02-26 4:37 ` Tian, Kevin
2016-02-26 4:44 ` Zhang, Haozhong
2016-02-26 8:01 ` Jan Beulich
2016-02-26 8:05 ` Haozhong Zhang
2016-02-29 2:02 ` Tian, Kevin
2016-02-29 2:45 ` Zhang, Haozhong
2016-02-29 9:04 ` Jan Beulich
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