linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Sean Christopherson <seanjc@google.com>
To: Kai Huang <kai.huang@intel.com>
Cc: kvm@vger.kernel.org, x86@kernel.org, linux-sgx@vger.kernel.org,
	linux-kernel@vger.kernel.org, jarkko@kernel.org, luto@kernel.org,
	dave.hansen@intel.com, rick.p.edgecombe@intel.com,
	haitao.huang@intel.com, pbonzini@redhat.com, bp@alien8.de,
	tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com
Subject: Re: [PATCH v3 03/25] x86/sgx: Wipe out EREMOVE from sgx_free_epc_page()
Date: Fri, 12 Mar 2021 13:21:54 -0800	[thread overview]
Message-ID: <YEvbcrTZyiUAxZAu@google.com> (raw)
In-Reply-To: <20210311020142.125722-1-kai.huang@intel.com>

On Thu, Mar 11, 2021, Kai Huang wrote:
> From: Jarkko Sakkinen <jarkko@kernel.org>
> 
> EREMOVE takes a page and removes any association between that page and
> an enclave.  It must be run on a page before it can be added into
> another enclave.  Currently, EREMOVE is run as part of pages being freed
> into the SGX page allocator.  It is not expected to fail.
> 
> KVM does not track how guest pages are used, which means that SGX
> virtualization use of EREMOVE might fail.
> 
> Break out the EREMOVE call from the SGX page allocator.  This will allow
> the SGX virtualization code to use the allocator directly.  (SGX/KVM
> will also introduce a more permissive EREMOVE helper).
> 
> Implement original sgx_free_epc_page() as sgx_encl_free_epc_page() to be
> more specific that it is used to free EPC page assigned to one enclave.
> Print an error message when EREMOVE fails to explicitly call out EPC
> page is leaked, and requires machine reboot to get leaked pages back.
> 
> Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
> Co-developed-by: Kai Huang <kai.huang@intel.com>
> Acked-by: Jarkko Sakkinen <jarkko@kernel.org>
> Signed-off-by: Kai Huang <kai.huang@intel.com>
> ---
> v2->v3:
> 
>  - Fixed bug during copy/paste which results in SECS page and va pages are not
>    correctly freed in sgx_encl_release() (sorry for the mistake).
>  - Added Jarkko's Acked-by.

That Acked-by should either be dropped or moved above Co-developed-by to make
checkpatch happy.

Reviewed-by: Sean Christopherson <seanjc@google.com>

  reply	other threads:[~2021-03-12 21:22 UTC|newest]

Thread overview: 105+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-09  1:38 [PATCH v2 00/25] KVM SGX virtualization support Kai Huang
2021-03-09  1:38 ` [PATCH v2 01/25] x86/cpufeatures: Make SGX_LC feature bit depend on SGX bit Kai Huang
2021-03-12 21:05   ` Sean Christopherson
2021-03-09  1:39 ` [PATCH v2 02/25] x86/cpufeatures: Add SGX1 and SGX2 sub-features Kai Huang
2021-03-12 21:10   ` Sean Christopherson
2021-03-09  1:39 ` [PATCH v2 03/25] x86/sgx: Wipe out EREMOVE from sgx_free_epc_page() Kai Huang
2021-03-10  9:35   ` Kai Huang
2021-03-11  2:01   ` [PATCH v3 " Kai Huang
2021-03-12 21:21     ` Sean Christopherson [this message]
2021-03-13 10:45       ` Jarkko Sakkinen
2021-03-15  7:12         ` Kai Huang
2021-03-15 13:18           ` Jarkko Sakkinen
2021-03-15 13:19             ` Jarkko Sakkinen
2021-03-15 20:29               ` Kai Huang
2021-03-15 22:59                 ` Jarkko Sakkinen
2021-03-15 23:50                   ` Kai Huang
2021-03-15 23:11                 ` Jarkko Sakkinen
2021-03-09  1:39 ` [PATCH v2 04/25] x86/sgx: Add SGX_CHILD_PRESENT hardware error code Kai Huang
2021-03-09  1:39 ` [PATCH v2 05/25] x86/sgx: Introduce virtual EPC for use by KVM guests Kai Huang
2021-03-09  1:39 ` [PATCH v2 06/25] x86/cpu/intel: Allow SGX virtualization without Launch Control support Kai Huang
2021-03-12 21:33   ` Sean Christopherson
2021-03-09  1:39 ` [PATCH v2 07/25] x86/sgx: Initialize virtual EPC driver even when SGX driver is disabled Kai Huang
2021-03-12 21:44   ` Sean Christopherson
2021-03-13 19:05     ` Jarkko Sakkinen
2021-03-13 19:07       ` Jarkko Sakkinen
2021-03-14 15:25         ` Jarkko Sakkinen
2021-03-14 15:27           ` Jarkko Sakkinen
2021-03-15  3:13             ` Kai Huang
2021-03-15 13:04               ` Jarkko Sakkinen
2021-03-15 13:51                 ` Jarkko Sakkinen
2021-03-15 20:48                   ` Kai Huang
2021-03-15 23:05                     ` Jarkko Sakkinen
2021-03-15 23:08                       ` Jarkko Sakkinen
2021-03-15 23:49                         ` Kai Huang
2021-03-16 12:44                           ` Jarkko Sakkinen
2021-03-16  1:13                         ` Sean Christopherson
2021-03-16 12:46                           ` Jarkko Sakkinen
2021-03-18  0:04                             ` Kai Huang
2021-03-09  1:39 ` [PATCH v2 08/25] x86/sgx: Expose SGX architectural definitions to the kernel Kai Huang
2021-03-12 21:58   ` Sean Christopherson
2021-03-15  3:36     ` Kai Huang
2021-03-09  1:39 ` [PATCH v2 09/25] x86/sgx: Move ENCLS leaf definitions to sgx.h Kai Huang
2021-03-09  1:39 ` [PATCH v2 10/25] x86/sgx: Add SGX2 ENCLS leaf definitions (EAUG, EMODPR and EMODT) Kai Huang
2021-03-09  1:39 ` [PATCH v2 11/25] x86/sgx: Add encls_faulted() helper Kai Huang
2021-03-09  1:39 ` [PATCH v2 12/25] x86/sgx: Add helper to update SGX_LEPUBKEYHASHn MSRs Kai Huang
2021-03-09  1:39 ` [PATCH v2 13/25] x86/sgx: Add helpers to expose ECREATE and EINIT to KVM Kai Huang
2021-03-15  4:08   ` Kai Huang
2021-03-09  1:39 ` [PATCH v2 14/25] x86/sgx: Move provisioning device creation out of SGX driver Kai Huang
2021-03-09  1:40 ` [PATCH v2 15/25] KVM: x86: Export kvm_mmu_gva_to_gpa_{read,write}() for SGX (VMX) Kai Huang
2021-03-09  1:40 ` [PATCH v2 16/25] KVM: x86: Define new #PF SGX error code bit Kai Huang
2021-03-09  1:40 ` [PATCH v2 17/25] KVM: x86: Add support for reverse CPUID lookup of scattered features Kai Huang
2021-03-09  1:40 ` [PATCH v2 18/25] KVM: x86: Add reverse-CPUID lookup support for scattered SGX features Kai Huang
2021-03-09  1:40 ` [PATCH v2 19/25] KVM: VMX: Add basic handling of VM-Exit from SGX enclave Kai Huang
2021-03-09  1:40 ` [PATCH v2 20/25] KVM: VMX: Frame in ENCLS handler for SGX virtualization Kai Huang
2021-03-09  1:40 ` [PATCH v2 21/25] KVM: VMX: Add SGX ENCLS[ECREATE] handler to enforce CPUID restrictions Kai Huang
2021-03-09  1:40 ` [PATCH v2 22/25] KVM: VMX: Add emulation of SGX Launch Control LE hash MSRs Kai Huang
2021-03-09  1:40 ` [PATCH v2 23/25] KVM: VMX: Add ENCLS[EINIT] handler to support SGX Launch Control (LC) Kai Huang
2021-03-09  1:40 ` [PATCH v2 24/25] KVM: VMX: Enable SGX virtualization for SGX1, SGX2 and LC Kai Huang
2021-03-09  1:41 ` [PATCH v2 25/25] KVM: x86: Add capability to grant VM access to privileged SGX attribute Kai Huang
2021-03-09  9:30 ` [PATCH v2 00/25] KVM SGX virtualization support Borislav Petkov
2021-03-09 18:08   ` Kai Huang
2021-03-09 18:49   ` Paolo Bonzini
2021-03-12 22:04     ` Sean Christopherson
2021-03-13  4:30       ` Kai Huang
2021-03-10  9:27   ` Kai Huang
2021-03-10 13:29     ` Borislav Petkov
2021-03-11  2:05       ` Kai Huang
2021-03-10 18:01   ` Jarkko Sakkinen
2021-03-10 20:44     ` Kai Huang
2021-03-19  7:29 [PATCH v3 " Kai Huang
2021-03-19  7:22 ` [PATCH v3 03/25] x86/sgx: Wipe out EREMOVE from sgx_free_epc_page() Kai Huang
2021-03-22 18:16   ` Borislav Petkov
2021-03-22 18:56     ` Sean Christopherson
2021-03-22 19:11       ` Paolo Bonzini
2021-03-22 20:43         ` Kai Huang
2021-03-23 16:40           ` Paolo Bonzini
2021-03-22 19:15       ` Borislav Petkov
2021-03-22 19:37         ` Sean Christopherson
2021-03-22 20:36           ` Kai Huang
2021-03-22 21:06           ` Borislav Petkov
2021-03-22 22:06             ` Kai Huang
2021-03-22 22:37               ` Borislav Petkov
2021-03-22 23:16                 ` Kai Huang
2021-03-23 15:45                   ` Sean Christopherson
2021-03-23 16:06                     ` Borislav Petkov
2021-03-23 16:21                       ` Sean Christopherson
2021-03-23 16:32                         ` Borislav Petkov
2021-03-23 16:51                           ` Sean Christopherson
2021-03-24  9:38                           ` Kai Huang
2021-03-24 10:09                             ` Paolo Bonzini
2021-03-24 10:48                               ` Kai Huang
2021-03-24 11:24                                 ` Paolo Bonzini
2021-03-24 23:23                               ` Kai Huang
2021-03-24 23:39                                 ` Paolo Bonzini
2021-03-24 23:46                                   ` Kai Huang
2021-03-25  8:42                                     ` Borislav Petkov
2021-03-25  9:38                                       ` Kai Huang
2021-03-25 16:52                                         ` Borislav Petkov
2021-03-24  9:28                         ` Jarkko Sakkinen
2021-03-23 16:38                       ` Paolo Bonzini
2021-03-23 17:02                         ` Sean Christopherson
2021-03-23 17:06                           ` Paolo Bonzini
2021-03-23 17:16                             ` Sean Christopherson
2021-03-23 18:16                             ` Borislav Petkov
2021-03-24  9:26                       ` Jarkko Sakkinen
2021-03-22 22:23             ` Kai Huang

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=YEvbcrTZyiUAxZAu@google.com \
    --to=seanjc@google.com \
    --cc=bp@alien8.de \
    --cc=dave.hansen@intel.com \
    --cc=haitao.huang@intel.com \
    --cc=hpa@zytor.com \
    --cc=jarkko@kernel.org \
    --cc=kai.huang@intel.com \
    --cc=kvm@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-sgx@vger.kernel.org \
    --cc=luto@kernel.org \
    --cc=mingo@redhat.com \
    --cc=pbonzini@redhat.com \
    --cc=rick.p.edgecombe@intel.com \
    --cc=tglx@linutronix.de \
    --cc=x86@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).