linux-kernel - Re: [PATCH v11 05/37] x86/trapnr: Add event type macros to <asm/trapnr.h>

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Date:   Tue, 26 Sep 2023 11:10:51 +0300
From:   Nikolay Borisov <nik.borisov@...e.com>
To:     Xin Li <xin3.li@...el.com>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-edac@...r.kernel.org,
        linux-hyperv@...r.kernel.org, kvm@...r.kernel.org,
        xen-devel@...ts.xenproject.org
Cc:     tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
        luto@...nel.org, pbonzini@...hat.com, seanjc@...gle.com,
        peterz@...radead.org, jgross@...e.com, ravi.v.shankar@...el.com,
        mhiramat@...nel.org, andrew.cooper3@...rix.com,
        jiangshanlai@...il.com
Subject: Re: [PATCH v11 05/37] x86/trapnr: Add event type macros to
 <asm/trapnr.h>



On 23.09.23 г. 12:41 ч., Xin Li wrote:
> Intel VT-x classifies events into eight different types, which is
> inherited by FRED for event identification. As such, event type
> becomes a common x86 concept, and should be defined in a common x86
> header.
> 
> Add event type macros to <asm/trapnr.h>, and use it in <asm/vmx.h>.
> 
> Suggested-by: H. Peter Anvin (Intel) <hpa@...or.com>
> Tested-by: Shan Kang <shan.kang@...el.com>
> Signed-off-by: Xin Li <xin3.li@...el.com>
> ---
> 
> Changes since v10:
> * A few comment fixes and improvements (Andrew Cooper).
> ---
>   arch/x86/include/asm/trapnr.h | 12 ++++++++++++
>   arch/x86/include/asm/vmx.h    | 17 +++++++++--------
>   2 files changed, 21 insertions(+), 8 deletions(-)
> 
> diff --git a/arch/x86/include/asm/trapnr.h b/arch/x86/include/asm/trapnr.h
> index f5d2325aa0b7..8d1154cdf787 100644
> --- a/arch/x86/include/asm/trapnr.h
> +++ b/arch/x86/include/asm/trapnr.h
> @@ -2,6 +2,18 @@
>   #ifndef _ASM_X86_TRAPNR_H
>   #define _ASM_X86_TRAPNR_H
>   
> +/*
> + * Event type codes used by FRED, Intel VT-x and AMD SVM
> + */
> +#define EVENT_TYPE_EXTINT	0	// External interrupt
> +#define EVENT_TYPE_RESERVED	1
> +#define EVENT_TYPE_NMI		2	// NMI
> +#define EVENT_TYPE_HWEXC	3	// Hardware originated traps, exceptions
> +#define EVENT_TYPE_SWINT	4	// INT n
> +#define EVENT_TYPE_PRIV_SWEXC	5	// INT1
> +#define EVENT_TYPE_SWEXC	6	// INTO, INT3

nit: This turned into INTO (Oh) rather than INT0( zero) in v11

<nit>