linux-kernel - Re: [PATCH v9 04/15] x86/sgx: Implement basic EPC misc cgroup functionality

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Date: Mon, 26 Feb 2024 19:25:58 +0100
From: Michal Koutný <mkoutny@...e.com>
To: Haitao Huang <haitao.huang@...ux.intel.com>
Cc: jarkko@...nel.org, dave.hansen@...ux.intel.com, tj@...nel.org, 
	linux-kernel@...r.kernel.org, linux-sgx@...r.kernel.org, x86@...nel.org, 
	cgroups@...r.kernel.org, tglx@...utronix.de, mingo@...hat.com, bp@...en8.de, 
	hpa@...or.com, sohil.mehta@...el.com, tim.c.chen@...ux.intel.com, 
	zhiquan1.li@...el.com, kristen@...ux.intel.com, seanjc@...gle.com, zhanb@...rosoft.com, 
	anakrish@...rosoft.com, mikko.ylinen@...ux.intel.com, yangjie@...rosoft.com, 
	chrisyan@...rosoft.com
Subject: Re: [PATCH v9 04/15] x86/sgx: Implement basic EPC misc cgroup
 functionality

On Mon, Feb 05, 2024 at 01:06:27PM -0800, Haitao Huang <haitao.huang@...ux.intel.com> wrote:
> +static int sgx_epc_cgroup_alloc(struct misc_cg *cg);
> +
> +const struct misc_res_ops sgx_epc_cgroup_ops = {
> +	.alloc = sgx_epc_cgroup_alloc,
> +	.free = sgx_epc_cgroup_free,
> +};
> +
> +static void sgx_epc_misc_init(struct misc_cg *cg, struct sgx_epc_cgroup *epc_cg)
> +{
> +	cg->res[MISC_CG_RES_SGX_EPC].priv = epc_cg;
> +	epc_cg->cg = cg;
> +}

This is a possibly a nit pick but I share it here for consideration.

Would it be more prudent to have the signature like
  alloc(struct misc_res *res, struct misc_cg *cg)
so that implementations are free of the assumption of how cg and res are
stored?


Thanks,
Michal

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