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

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On 07/03/2018 11:19 AM, Jarkko Sakkinen wrote:
> +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;
> +	uint64_t xfrm;
> +	uint32_t mrenclave[8];
> +	uint8_t reserved2[SGX_SECS_RESERVED2_SIZE];
> +	uint32_t mrsigner[8];
> +	uint8_t	reserved3[SGX_SECS_RESERVED3_SIZE];
> +	uint16_t isvvprodid;
> +	uint16_t isvsvn;
> +	uint8_t reserved4[SGX_SECS_RESERVED4_SIZE];
> +} __packed __aligned(4096);

Why are the uint* versions in use here?  Those are for userspace ABI,
but this is entirely for in-kernel-use, right?

We've used u8/16/32/64 in arch code in a bunch of places.  They're at
least a bit more compact and easier to read.  It's this:

	u8	foo;
	u64	bar;

vs. this:

	uint8_t	 foo;
	uint64_t bar;



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