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List:       linux-virtualization
Subject:    Re: [PATCH v6 70/76] x86/smpboot: Setup TSS for starting AP
From:       Borislav Petkov <bp () alien8 ! de>
Date:       2020-08-31 17:25:19
Message-ID: 20200831172519.GL27517 () zn ! tnic
[Download RAW message or body]

On Mon, Aug 24, 2020 at 10:55:05AM +0200, Joerg Roedel wrote:
> @@ -1814,27 +1814,26 @@ static inline void ucode_cpu_init(int cpu)
>  		load_ucode_ap();
>  }
>  
> -static inline void tss_setup_ist(struct tss_struct *tss)
> +static inline void tss_setup_ist(struct tss_struct *tss,
> +				 struct cpu_entry_area *cea)
>  {
>  	/* Set up the per-CPU TSS IST stacks */
> -	tss->x86_tss.ist[IST_INDEX_DF] = __this_cpu_ist_top_va(DF);
> -	tss->x86_tss.ist[IST_INDEX_NMI] = __this_cpu_ist_top_va(NMI);
> -	tss->x86_tss.ist[IST_INDEX_DB] = __this_cpu_ist_top_va(DB);
> -	tss->x86_tss.ist[IST_INDEX_MCE] = __this_cpu_ist_top_va(MCE);
> +	tss->x86_tss.ist[IST_INDEX_DF]  = CEA_ESTACK_TOP(&cea->estacks, DF);
> +	tss->x86_tss.ist[IST_INDEX_NMI] = CEA_ESTACK_TOP(&cea->estacks, NMI);
> +	tss->x86_tss.ist[IST_INDEX_DB]  = CEA_ESTACK_TOP(&cea->estacks, DB);
> +	tss->x86_tss.ist[IST_INDEX_MCE] = CEA_ESTACK_TOP(&cea->estacks, MCE);

#ifdef CONFIG_AMD_MEM_ENCRYPT

>  	/* Only mapped when SEV-ES is active */
> -	tss->x86_tss.ist[IST_INDEX_VC] = __this_cpu_ist_top_va(VC);
> +	tss->x86_tss.ist[IST_INDEX_VC]	= CEA_ESTACK_TOP(&cea->estacks, VC);

#endif

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette
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