Re: [PATCH v5] x86/sgx: Free backing memory after faulting the enclave page

Jarkko Sakkinen
2022-03-02T01:40:56Z

On Tue, Mar 01, 2022 at 09:54:14AM -0800, Dave Hansen wrote:
> On 3/1/22 04:58, Jarkko Sakkinen wrote:
> > @@ -32,14 +58,16 @@ static int __sgx_encl_eldu(struct sgx_encl_page *encl_page,
> > else
> > page_index = PFN_DOWN(encl->size);
> >
> > + page_pcmd_off = sgx_encl_get_backing_page_pcmd_offset(encl, page_index);
> > +
> > ret = sgx_encl_lookup_backing(encl, page_index, &b);
> > if (ret)
> > return ret;
>
> What tree is this against? It looks like it might be on top of
> Kristen's overcommit series.
>
> It would be best if you could test this on top of tip/sgx. Kristen
> changed code in this area as well.

I rebased this against latest stuff and now I did a sanity check:

$ git fetch tip
remote: Enumerating objects: 75, done.
remote: Counting objects: 100% (75/75), done.
remote: Compressing objects: 100% (12/12), done.
remote: Total 77 (delta 65), reused 65 (delta 63), pack-reused 2
Unpacking objects: 100% (77/77), 34.07 KiB | 157.00 KiB/s, done.
From git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
161a9a33702a..cedd3614e5d9 perf/core -> tip/perf/core
6255b48aebfd..25795ef6299f sched/core -> tip/sched/core

$ git rebase tip/x86/sgx
Current branch master is up to date.

BR, Jarkko