linux-kernel - Re: [RFC Part2 PATCH v3 02/26] crypto: ccp: Add Platform Security Processor (PSP) device support

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Date:   Wed, 6 Sep 2017 15:38:38 -0500
From:   Brijesh Singh <brijesh.singh@....com>
To:     Borislav Petkov <bp@...e.de>
Cc:     brijesh.singh@....com, linux-kernel@...r.kernel.org,
        x86@...nel.org, kvm@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Joerg Roedel <joro@...tes.org>,
        "Michael S . Tsirkin" <mst@...hat.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        \"Radim Krčmář\" <rkrcmar@...hat.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        "David S . Miller" <davem@...emloft.net>,
        Gary Hook <gary.hook@....com>, linux-crypto@...r.kernel.org
Subject: Re: [RFC Part2 PATCH v3 02/26] crypto: ccp: Add Platform Security
 Processor (PSP) device support

Hi Boris,


On 09/06/2017 12:00 PM, Borislav Petkov wrote:

...

> --------------------------
> |diff --git a/drivers/crypto/ccp/sp-dev.c b/drivers/crypto/ccp/sp-dev.c
> |index a017233..d263ba4 100644
> |--- a/drivers/crypto/ccp/sp-dev.c
> |+++ b/drivers/crypto/ccp/sp-dev.c
> --------------------------
> 
> What tree is that against? In any case, it doesn't apply here.
> 
>> This RFC is based on tip/master commit : 22db3de (Merge branch 'x86/mm').
> 

This bit of my struggle -- tip/master is not in sync with cryptodev-2.6 [1].
In order to expand the CCP driver we need the following commits from the
cryptodev-2.6

57de3aefb73f crypto: ccp - remove ccp_present() check from device initialize
d0ebbc0c407a crypto: ccp - rename ccp driver initialize files as sp device
f4d18d656f88 crypto: ccp - Abstract interrupt registeration
720419f01832 crypto: ccp - Introduce the AMD Secure Processor device
970e8303cb8d crypto: ccp - Use devres interface to allocate PCI/iomap and cleanup

I cherry-picked these patches into tip/master before starting the SEV work.

Since these patches were already reviewed and accepted hence I did not include it
in my RFC series. I am not sure what is best way to handle it. Should I include
these patches in the series ? or just mention them in cover letter ? I am looking
for suggestions on how to best communicate it. thanks

[1] https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git/

My staging tree on github contain these precursor patches.


> $ git show 22db3de
> fatal: ambiguous argument '22db3de': unknown revision or path not in the working tree.
> 
> Do you have updated version of the series which you can send out?
> 
>> @@ -67,6 +74,10 @@ struct sp_device {
>>   	/* DMA caching attribute support */
>>   	unsigned int axcache;
>>   
>> +	/* get and set master device */
>> +	struct sp_device*(*get_psp_master_device)(void);
>> +	void(*set_psp_master_device)(struct sp_device *);
> 
> WARNING: missing space after return type
> #502: FILE: drivers/crypto/ccp/sp-dev.h:79:
> +       void(*set_psp_master_device)(struct sp_device *);
> 
> Don't forget to run all patches through checkpatch. Some of the warnings
> make sense.
> 
> Thx.
>