linux-kernel - Re: [PATCH v3 11/12] x86/virt/tdx: Allow SEAMCALL to handle #UD and #GP

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Message-ID: <20230806114131.2ilofgmxhdaa2u6b@box.shutemov.name>
Date:   Sun, 6 Aug 2023 14:41:31 +0300
From:   kirill.shutemov@...ux.intel.com
To:     Kai Huang <kai.huang@...el.com>
Cc:     peterz@...radead.org, linux-kernel@...r.kernel.org,
        dave.hansen@...el.com, tglx@...utronix.de, bp@...en8.de,
        mingo@...hat.com, hpa@...or.com, x86@...nel.org, seanjc@...gle.com,
        pbonzini@...hat.com, isaku.yamahata@...el.com,
        sathyanarayanan.kuppuswamy@...ux.intel.com,
        n.borisov.lkml@...il.com
Subject: Re: [PATCH v3 11/12] x86/virt/tdx: Allow SEAMCALL to handle #UD and
 #GP

On Wed, Jul 26, 2023 at 11:25:13PM +1200, Kai Huang wrote:
> @@ -20,6 +21,9 @@
>  #define TDX_SW_ERROR			(TDX_ERROR | GENMASK_ULL(47, 40))
>  #define TDX_SEAMCALL_VMFAILINVALID	(TDX_SW_ERROR | _UL(0xFFFF0000))
>  
> +#define TDX_SEAMCALL_GP			(TDX_SW_ERROR | X86_TRAP_GP)
> +#define TDX_SEAMCALL_UD			(TDX_SW_ERROR | X86_TRAP_UD)

Is there any explantion how these error codes got chosen? Looks very
arbitrary and may collide with other error codes in the future.

-- 
  Kiryl Shutsemau / Kirill A. Shutemov