linux-kernel - Re: [RFC PATCH V4 17/17] x86/sev: Remove restrict interrupt injection from SNP_FEATURES_IMPL

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 4 Apr 2023 14:25:33 +0200
From:   "Gupta, Pankaj" <pankaj.gupta@....com>
To:     Tianyu Lan <ltykernel@...il.com>, luto@...nel.org,
        tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
        seanjc@...gle.com, pbonzini@...hat.com, jgross@...e.com,
        tiala@...rosoft.com, kirill@...temov.name,
        jiangshan.ljs@...group.com, peterz@...radead.org,
        ashish.kalra@....com, srutherford@...gle.com,
        akpm@...ux-foundation.org, anshuman.khandual@....com,
        pawan.kumar.gupta@...ux.intel.com, adrian.hunter@...el.com,
        daniel.sneddon@...ux.intel.com, alexander.shishkin@...ux.intel.com,
        sandipan.das@....com, ray.huang@....com, brijesh.singh@....com,
        michael.roth@....com, thomas.lendacky@....com,
        venu.busireddy@...cle.com, sterritt@...gle.com,
        tony.luck@...el.com, samitolvanen@...gle.com, fenghua.yu@...el.com
Cc:     pangupta@....com, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, linux-hyperv@...r.kernel.org,
        linux-arch@...r.kernel.org
Subject: Re: [RFC PATCH V4 17/17] x86/sev: Remove restrict interrupt injection
 from SNP_FEATURES_IMPL_REQ


> Enabled restrict interrupt injection function. Remove MSR_AMD64_
> SNP_RESTRICTED_INJ from SNP_FEATURES_IMPL_REQ to let kernel boot
> up with this function.
> ---
>   arch/x86/boot/compressed/sev.c | 1 -
>   1 file changed, 1 deletion(-)
> 
> diff --git a/arch/x86/boot/compressed/sev.c b/arch/x86/boot/compressed/sev.c
> index d63ad8f99f83..a5f41301a600 100644
> --- a/arch/x86/boot/compressed/sev.c
> +++ b/arch/x86/boot/compressed/sev.c
> @@ -299,7 +299,6 @@ static void enforce_vmpl0(void)
>    */
>   #define SNP_FEATURES_IMPL_REQ	(MSR_AMD64_SNP_VTOM |			\
>   				 MSR_AMD64_SNP_REFLECT_VC |		\
> -				 MSR_AMD64_SNP_RESTRICTED_INJ |		\

Should we update the bit in "SNP_FEATURES_PRESENT" instead?

Thanks,
Pankaj	
>   				 MSR_AMD64_SNP_ALT_INJ |		\
>   				 MSR_AMD64_SNP_DEBUG_SWAP |		\
>   				 MSR_AMD64_SNP_VMPL_SSS |		\