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Re: [RFC PATCH v2 01/10] x86: Add architectural LBR definitions
- To: Tu Dinh <ngoc-tu.dinh@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 14 Jan 2025 17:35:35 +0100
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- Cc: Anthony PERARD <anthony.perard@xxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 14 Jan 2025 16:35:55 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 02.01.2025 09:45, Tu Dinh wrote:
> --- a/xen/arch/x86/include/asm/msr-index.h
> +++ b/xen/arch/x86/include/asm/msr-index.h
> @@ -112,6 +112,8 @@
> #define MCU_OPT_CTRL_GDS_MIT_DIS (_AC(1, ULL) << 4)
> #define MCU_OPT_CTRL_GDS_MIT_LOCK (_AC(1, ULL) << 5)
>
> +#define MSR_LER_INFO 0x000001e0
> +
> #define MSR_RTIT_OUTPUT_BASE 0x00000560
> #define MSR_RTIT_OUTPUT_MASK 0x00000561
> #define MSR_RTIT_CTL 0x00000570
> @@ -193,6 +195,16 @@
> #define MSR_UARCH_MISC_CTRL 0x00001b01
> #define UARCH_CTRL_DOITM (_AC(1, ULL) << 0)
>
> +/* Architectural LBR state MSRs */
> +#define MSR_LBR_INFO(n) (0x00001200 + (n))
> +#define MSR_LBR_CTL 0x000014ce
> +#define LBR_CTL_VALID _AC(0x7f000f, ULL)
While I can see that such a value may be useful at some point, I think it wants
introducing when needed and composing of definitions for the individual bits.
Jan
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