Re: [PATCH v1 6/8] x86/sev: Register the guest with the SVSM APIC protocol

[Borislav Petkov]

On Sat, Aug 29, 2026 at 03:39:44AM +0000, Melody Wang wrote:
> @@ -520,5 +520,22 @@ bool sev_prepare(void)
>  		return true;
>  	}
>  
> +	/* Register Alternate Injection */
> +	if (early_is_sevsnp_guest() && snp_vmpl) {
> +		struct svsm_call call = {};
> +		int ret;
> +
> +		if (!(sev_get_status() & MSR_AMD64_SNP_ALTERNATE_INJ))
> +			return 0;

Function is a bool - this needs to be

			return false;

> +
> +		call.caa = (struct svsm_ca *)boot_svsm_caa_pa;
> +		call.rax = SVSM_APIC_CALL(SVSM_APIC_CONFIG_EMULATION);
> +		call.rcx = SVSM_AI_REGISTER;
> +
> +		ret = svsm_call_msr_protocol(&call);
> +		if (ret)
> +			sev_es_terminate(SEV_TERM_SET_LINUX, GHCB_TERM_ALT_INJ_FAIL);
> +	}
> +
>  	return false;
>  }

-- 
Regards/Gruss,
    Boris.

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