linux-kernel - Re: [Part2 PATCH v6.1 16/38] crypto: ccp: Add Secure Encrypted Virtualization (SEV) command support

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Message-ID: <20171031103928.nl6v4bps3sajolft@pd.tnic>
Date:   Tue, 31 Oct 2017 11:39:28 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Brijesh Singh <brijesh.singh@....com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Gary Hook <gary.hook@....com>,
        Tom Lendacky <thomas.lendacky@....com>,
        linux-crypto@...r.kernel.org, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [Part2 PATCH v6.1 16/38] crypto: ccp: Add Secure Encrypted
 Virtualization (SEV) command support

On Mon, Oct 30, 2017 at 08:29:25PM -0500, Brijesh Singh wrote:
> Okay, Just tried static global with CONFIG_VMAP_STACK=y and I am getting
> wrong physical address with __pa. PSP command fails with error code
> "INVALID_ADDRESS". The same thing works fine with kmalloc() buffer.

Ah, right, module space is vmalloc-ed.

> To avoid repeated k*alloc calls, I could devm_kzalloc() these variable 
> during sev_init() and reuse them when needed.

Yap, something like that.

Thx.

-- 
Regards/Gruss,
    Boris.

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