Re: [PATCH v13 09/13] x86/sgx: Enclave Page Cache (EPC) memory manager

[Jarkko Sakkinen]

On Mon, Aug 27, 2018 at 02:15:34PM -0700, Dave Hansen wrote:
> On 08/27/2018 11:53 AM, Jarkko Sakkinen wrote:
> > +struct sgx_epc_page_ops {
> > +	bool (*get)(struct sgx_epc_page *epc_page);
> > +	void (*put)(struct sgx_epc_page *epc_page);
> > +	bool (*reclaim)(struct sgx_epc_page *epc_page);
> > +	void (*block)(struct sgx_epc_page *epc_page);
> > +	void (*write)(struct sgx_epc_page *epc_page);
> > +};
> 
> Why do we need a fancy, slow (retpoline'd) set of function pointers when
> we only have one user of these (the SGX driver)?

KVM has its own implementation for these operations.

/Jarkko