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Re: [PATCH v2] xen/x86: public: add TSC defines for cpuid leaf 4
- To: Krister Johansen <kjlx@xxxxxxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 26 Jan 2023 10:57:01 +0100
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, David Reaver <me@xxxxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Thu, 26 Jan 2023 09:57:19 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 25.01.2023 19:45, Krister Johansen wrote:
> --- a/xen/include/public/arch-x86/cpuid.h
> +++ b/xen/include/public/arch-x86/cpuid.h
> @@ -72,6 +72,14 @@
> * Sub-leaf 2: EAX: host tsc frequency in kHz
> */
>
> +#define XEN_CPUID_TSC_EMULATED (1u << 0)
> +#define XEN_CPUID_HOST_TSC_RELIABLE (1u << 1)
> +#define XEN_CPUID_RDTSCP_INSTR_AVAIL (1u << 2)
> +#define XEN_CPUID_TSC_MODE_DEFAULT (0)
> +#define XEN_CPUID_TSC_MODE_EMULATE (1u)
> +#define XEN_CPUID_TSC_MODE_NOEMULATE (2u)
> +#define XEN_CPUID_TSC_MODE_NOEMULATE_TSC_AUX (3u)
Actually I think we'd better stick to the names found in asm/time.h
(and then replace their uses, dropping the #define-s there). If you
agree, I'd be happy to make the adjustment while committing.
Jan
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