From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: linux-sgx@vger.kernel.org, Andy Lutomirski <luto@kernel.org>
Subject: Re: [PATCH for_v22 v2 8/8] x86/sgx: Pass userspace source address directly to EADD
Date: Thu, 22 Aug 2019 20:00:15 +0300 [thread overview]
Message-ID: <5156a9c133e757dfcf8a8d003d39992aed6ade9a.camel@linux.intel.com> (raw)
In-Reply-To: <20190822145049.GD25467@linux.intel.com>
On Thu, 2019-08-22 at 07:50 -0700, Sean Christopherson wrote:
> On Thu, Aug 22, 2019 at 05:37:18PM +0300, Jarkko Sakkinen wrote:
> > On Mon, 2019-08-12 at 18:12 -0700, Sean Christopherson wrote:
> > > Invoke EADD with the userspace source address instead of first copying
> > > the data to a kernel page to avoid the overhead of alloc_page() and
> > > copy_from_user().
> > >
> > > Suggested-by: Andy Lutomirski <luto@kernel.org>
> > > Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
> >
> > NAK because takes away TCS validation and the commit message
> > does not give any reasoning for doing that.
>
> Doh, I have a thorough explanation, but apparently it never made it from
> my head to the changelog. I'll send v2 as a standalone patch.
Yeah, w/o explanation I won't just take away functionality :-)
/Jarkko
next prev parent reply other threads:[~2019-08-22 17:00 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-13 1:12 [PATCH for_v22 v2 0/8] x86/sgx: Remove EADD worker and page copy Sean Christopherson
2019-08-13 1:12 ` [PATCH for_v22 v2 1/8] selftests/x86/sgx: Align enclave binary on 4k boundary Sean Christopherson
2019-08-16 13:55 ` Jarkko Sakkinen
2019-08-16 15:36 ` Jethro Beekman
2019-08-16 23:41 ` Jarkko Sakkinen
2019-08-13 1:12 ` [PATCH for_v22 v2 2/8] x86/sgx: Require EADD source to be page aligned Sean Christopherson
2019-08-16 14:15 ` Jarkko Sakkinen
2019-08-13 1:12 ` [PATCH for_v22 v2 3/8] x86/sgx: Validate generic SECINFO immediately after copying from user Sean Christopherson
2019-08-13 1:12 ` [PATCH for_v22 v2 4/8] x86/sgx: Set SGX_ENCL_PAGE_TCS when allocating encl_page Sean Christopherson
2019-08-22 12:56 ` Jarkko Sakkinen
2019-08-22 14:24 ` Sean Christopherson
2019-08-13 1:12 ` [PATCH for_v22 v2 5/8] x86/sgx: Move encl_page insertion into tree out of alloc flow Sean Christopherson
2019-08-13 1:12 ` [PATCH for_v22 v2 6/8] x86/sgx: Allocate encl_page prior to taking encl->lock Sean Christopherson
2019-08-13 1:12 ` [PATCH for_v22 v2 7/8] x86/sgx: Remove the EADD page worker Sean Christopherson
2019-08-13 1:12 ` [PATCH for_v22 v2 8/8] x86/sgx: Pass userspace source address directly to EADD Sean Christopherson
2019-08-22 14:37 ` Jarkko Sakkinen
2019-08-22 14:50 ` Sean Christopherson
2019-08-22 17:00 ` Jarkko Sakkinen [this message]
2019-08-23 1:25 ` Jarkko Sakkinen
2019-08-23 1:28 ` Sean Christopherson
2019-08-23 1:34 ` Sean Christopherson
2019-08-15 22:00 ` [PATCH for_v22 v2 0/8] x86/sgx: Remove EADD worker and page copy Jarkko Sakkinen
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