linux-kernel - Re: [PATCH v12 05/13] x86/sgx: architectural structures

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Date:   Tue, 3 Jul 2018 21:04:01 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
cc:     x86@...nel.org, platform-driver-x86@...r.kernel.org,
        dave.hansen@...el.com, sean.j.christopherson@...el.com,
        nhorman@...hat.com, npmccallum@...hat.com,
        linux-sgx@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        "open list:X86 ARCHITECTURE (32-BIT AND 64-BIT)" 
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v12 05/13] x86/sgx: architectural structures

On Tue, 3 Jul 2018, Jarkko Sakkinen wrote:

> This commit adds arch/x86/include/asm/sgx_arch.h that contains definitions

This is not a commit. Simply: Add .....

> for data structures used by the SGX.
> 
> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> Co-developed-by: Suresh Siddha <suresh.b.siddha@...el.com>

Documentaiton:

  A Co-Developed-by: states that the patch was also created by another developer
  along with the original author.  This is useful at times when multiple people
  work on a single patch.  Note, this person also needs to have a Signed-off-by:
  line in the patch as well.

Please fix all over the place.

> +
> +#define SGX_MISC_RESERVED_MASK 0xFFFFFFFFFFFFFFFEL

L ? ULL I'd say...

> +#define SGX_ATTR_RESERVED_MASK 0xFFFFFFFFFFFFFFC9L

Ditto

> +#define SGX_SECS_RESERVED1_SIZE 24
> +#define SGX_SECS_RESERVED2_SIZE 32
> +#define SGX_SECS_RESERVED3_SIZE 96
> +#define SGX_SECS_RESERVED4_SIZE 3836
> +
> +struct sgx_secs {
> +	uint64_t size;
> +	uint64_t base;
> +	uint32_t ssaframesize;
> +	uint32_t miscselect;
> +	uint8_t reserved1[SGX_SECS_RESERVED1_SIZE];
> +	uint64_t attributes;

Please make these tabular aligned for readility sake

> +	uint32_t	miscselect;
> +	uint8_t		reserved1[SGX_SECS_RESERVED1_SIZE];
> +	uint64_t	attributes;

Hmm? All over the place...

> +enum sgx_tcs_flags {
> +	SGX_TCS_DBGOPTIN	= 0x01, /* cleared on EADD */

Please do not use tail comments. Either put the comment above the define or
use kernel doc.

> +};
> +
> +#define SGX_TCS_RESERVED_MASK 0xFFFFFFFFFFFFFFFEL

See above.

> +#define SGX_SECINFO_PERMISSION_MASK	0x0000000000000007L
> +#define SGX_SECINFO_PAGE_TYPE_MASK	0x000000000000FF00L
> +#define SGX_SECINFO_RESERVED_MASK	0xFFFFFFFFFFFF00F8L

Ditto

Thanks,

	tglx