On Wed, May 27, 2020 at 10:35:09PM +0200, Borislav Petkov wrote:
> > One idea would be to provide a Kconfig a la NR_CPUS or NODES_SHIFT. I.e.
> > carve out the bits in sgx_epc_page_desc to allow up to N sections, but let
> > the user limit the number of sections to recoup the unused memory.
>
>
On Thu, May 28, 2020 at 09:14:43AM +0300, Jarkko Sakkinen wrote:
> On Thu, May 28, 2020 at 08:35:15AM +0300, Jarkko Sakkinen wrote:
> > On Thu, May 28, 2020 at 08:25:43AM +0300, Jarkko Sakkinen wrote:
> > > On Tue, May 26, 2020 at 08:56:14PM -0700, Sean Christopherson wrote:
> > > > On Mon, May 25,
On Thu, May 28, 2020 at 08:35:15AM +0300, Jarkko Sakkinen wrote:
> On Thu, May 28, 2020 at 08:25:43AM +0300, Jarkko Sakkinen wrote:
> > On Tue, May 26, 2020 at 08:56:14PM -0700, Sean Christopherson wrote:
> > > On Mon, May 25, 2020 at 11:23:04AM +0200, Borislav Petkov wrote:
> > > > On Fri, May 15,
On Thu, May 28, 2020 at 08:25:43AM +0300, Jarkko Sakkinen wrote:
> On Tue, May 26, 2020 at 08:56:14PM -0700, Sean Christopherson wrote:
> > On Mon, May 25, 2020 at 11:23:04AM +0200, Borislav Petkov wrote:
> > > On Fri, May 15, 2020 at 03:43:57AM +0300, Jarkko Sakkinen wrote:
> > > > +struct sgx_epc
On Tue, May 26, 2020 at 08:56:14PM -0700, Sean Christopherson wrote:
> On Mon, May 25, 2020 at 11:23:04AM +0200, Borislav Petkov wrote:
> > On Fri, May 15, 2020 at 03:43:57AM +0300, Jarkko Sakkinen wrote:
> > > +struct sgx_epc_section sgx_epc_sections[SGX_MAX_EPC_SECTIONS];
> > > +int sgx_nr_epc_se
On Mon, May 25, 2020 at 11:23:04AM +0200, Borislav Petkov wrote:
> Enabling this gives:
>
> In file included from arch/x86/kernel/cpu/sgx/main.c:11:
> arch/x86/kernel/cpu/sgx/encls.h:189:51: warning: ‘struct sgx_einittoken’
> declared inside parameter list will not be visible outside of this defi
On Tue, May 26, 2020 at 08:56:14PM -0700, Sean Christopherson wrote:
> > > + if (i == ARRAY_SIZE(sgx_epc_sections)) {
> > > + pr_warn("No free slot for an EPC section\n");
> > > + break;
> > > + }
> >
> > This is also the loop termination: do we real
On Mon, May 25, 2020 at 11:23:04AM +0200, Borislav Petkov wrote:
> On Fri, May 15, 2020 at 03:43:57AM +0300, Jarkko Sakkinen wrote:
> > +struct sgx_epc_section sgx_epc_sections[SGX_MAX_EPC_SECTIONS];
> > +int sgx_nr_epc_sections;
>
> We have become very averse against global stuff. What is going t
On Fri, May 15, 2020 at 03:43:57AM +0300, Jarkko Sakkinen wrote:
> +config INTEL_SGX
> + bool "Intel SGX"
> + depends on X86_64 && CPU_SUP_INTEL
> + select SRCU
> + select MMU_NOTIFIER
> + help
> + Intel(R) SGX is a set of CPU instructions that can be used by
> + app
From: Sean Christopherson
Enumerate Enclave Page Cache (EPC) sections via CPUID and add the data
structures necessary to track EPC pages so that they can be allocated,
freed and managed. As a system may have multiple EPC sections, invoke CPUID
on SGX sub-leafs until an invalid leaf is encountered
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