linux-sgx.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Jarkko Sakkinen <jarkko@kernel.org>
To: Kai Huang <kai.huang@intel.com>
Cc: linux-sgx@vger.kernel.org, kvm@vger.kernel.org, x86@kernel.org,
	seanjc@google.com, luto@kernel.org, dave.hansen@intel.com,
	haitao.huang@intel.com, pbonzini@redhat.com, bp@alien8.de,
	tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
	jmattson@google.com, joro@8bytes.org, vkuznets@redhat.com,
	wanpengli@tencent.com
Subject: Re: [RFC PATCH v2 16/26] KVM: x86: Export kvm_mmu_gva_to_gpa_{read,write}() for SGX (VMX)
Date: Wed, 20 Jan 2021 16:19:18 +0200	[thread overview]
Message-ID: <YAg75hHsWm0j/pnJ@kernel.org> (raw)
In-Reply-To: <347d84df280cc326ebdb097ab3a30aed2818ae8c.1610935432.git.kai.huang@intel.com>

On Mon, Jan 18, 2021 at 04:28:27PM +1300, Kai Huang wrote:
> From: Sean Christopherson <sean.j.christopherson@intel.com>
> 
> Export the gva_to_gpa() helpers for use by SGX virtualization when
> executing ENCLS[ECREATE] and ENCLS[EINIT] on behalf of the guest.
> To execute ECREATE and EINIT, KVM must obtain the GPA of the target
> Secure Enclave Control Structure (SECS) in order to get its
> corresponding HVA.
> 
> Because the SECS must reside in the Enclave Page Cache (EPC), copying
> the SECS's data to a host-controlled buffer via existing exported
> helpers is not a viable option as the EPC is not readable or writable
> by the kernel.
> 
> SGX virtualization will also use gva_to_gpa() to obtain HVAs for
> non-EPC pages in order to pass user pointers directly to ECREATE and
> EINIT, which avoids having to copy pages worth of data into the kernel.
> 
> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
> Signed-off-by: Kai Huang <kai.huang@intel.com>

Acked-by: Jarkko Sakkinen <jarkko@kernel.org>

/Jarkko

> ---
>  arch/x86/kvm/x86.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 9a8969a6dd06..5ca7b181a3ae 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -5891,6 +5891,7 @@ gpa_t kvm_mmu_gva_to_gpa_read(struct kvm_vcpu *vcpu, gva_t gva,
>  	u32 access = (kvm_x86_ops.get_cpl(vcpu) == 3) ? PFERR_USER_MASK : 0;
>  	return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception);
>  }
> +EXPORT_SYMBOL_GPL(kvm_mmu_gva_to_gpa_read);
>  
>   gpa_t kvm_mmu_gva_to_gpa_fetch(struct kvm_vcpu *vcpu, gva_t gva,
>  				struct x86_exception *exception)
> @@ -5907,6 +5908,7 @@ gpa_t kvm_mmu_gva_to_gpa_write(struct kvm_vcpu *vcpu, gva_t gva,
>  	access |= PFERR_WRITE_MASK;
>  	return vcpu->arch.walk_mmu->gva_to_gpa(vcpu, gva, access, exception);
>  }
> +EXPORT_SYMBOL_GPL(kvm_mmu_gva_to_gpa_write);
>  
>  /* uses this to access any guest's mapped memory without checking CPL */
>  gpa_t kvm_mmu_gva_to_gpa_system(struct kvm_vcpu *vcpu, gva_t gva,
> -- 
> 2.29.2
> 
> 

  reply	other threads:[~2021-01-20 14:48 UTC|newest]

Thread overview: 91+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-18  3:26 [RFC PATCH v2 00/26] KVM SGX virtualization support Kai Huang
2021-01-18  3:26 ` [RFC PATCH v2 01/26] x86/cpufeatures: Add SGX1 and SGX2 sub-features Kai Huang
2021-01-19 16:19   ` Borislav Petkov
2021-01-19 18:03     ` Sean Christopherson
2021-01-19 22:54       ` Kai Huang
2021-01-20 10:28       ` Borislav Petkov
2021-01-20 11:50   ` Jarkko Sakkinen
2021-01-20 23:23     ` Kai Huang
2021-01-21  1:01       ` Jarkko Sakkinen
2021-01-18  3:26 ` [RFC PATCH v2 02/26] x86/sgx: Remove a warn from sgx_free_epc_page() Kai Huang
2021-01-19  8:32   ` Jarkko Sakkinen
2021-01-20  0:42     ` Kai Huang
2021-01-18  3:26 ` [RFC PATCH v2 03/26] x86/sgx: Wipe out EREMOVE " Kai Huang
2021-01-18  3:26 ` [RFC PATCH v2 04/26] x86/sgx: Add SGX_CHILD_PRESENT hardware error code Kai Huang
2021-01-20 11:51   ` Jarkko Sakkinen
2021-01-18  3:26 ` [RFC PATCH v2 05/26] x86/sgx: Introduce virtual EPC for use by KVM guests Kai Huang
2021-01-20 11:54   ` Jarkko Sakkinen
2021-01-20 17:40     ` Sean Christopherson
2021-01-21  0:54       ` Jarkko Sakkinen
2021-01-21  0:55         ` Jarkko Sakkinen
2021-01-18  3:27 ` [RFC PATCH v2 06/26] x86/cpu/intel: Allow SGX virtualization without Launch Control support Kai Huang
2021-01-20 21:02   ` Dave Hansen
2021-01-20 22:36     ` Sean Christopherson
2021-01-20 23:27       ` Dave Hansen
2021-01-20 23:48         ` Kai Huang
2021-01-20 23:51           ` Dave Hansen
2021-01-21  1:53             ` Kai Huang
2021-01-21 14:35               ` Jarkko Sakkinen
2021-01-21  1:12         ` Jarkko Sakkinen
2021-01-20 23:50     ` Kai Huang
2021-01-21  1:11     ` Jarkko Sakkinen
2021-01-18  3:27 ` [RFC PATCH v2 07/26] x86/sgx: Initialize virtual EPC driver even when SGX driver is disabled Kai Huang
2021-01-18  3:27 ` [RFC PATCH v2 08/26] x86/sgx: Expose SGX architectural definitions to the kernel Kai Huang
2021-01-20 11:58   ` Jarkko Sakkinen
2021-01-20 23:53     ` Kai Huang
2021-01-18  3:27 ` [RFC PATCH v2 09/26] x86/sgx: Move ENCLS leaf definitions to sgx_arch.h Kai Huang
2021-01-20 11:59   ` Jarkko Sakkinen
2021-01-18  3:28 ` [RFC PATCH v2 10/26] x86/sgx: Add SGX2 ENCLS leaf definitions (EAUG, EMODPR and EMODT) Kai Huang
2021-01-20 11:59   ` Jarkko Sakkinen
2021-01-18  3:28 ` [RFC PATCH v2 11/26] x86/sgx: Add encls_faulted() helper Kai Huang
2021-01-20 12:03   ` Jarkko Sakkinen
2021-01-20 23:43     ` Kai Huang
2021-01-21  1:08       ` Jarkko Sakkinen
2021-01-21  1:12         ` Kai Huang
2021-01-21 14:38           ` Jarkko Sakkinen
2021-01-18  3:28 ` [RFC PATCH v2 12/26] x86/sgx: Add helper to update SGX_LEPUBKEYHASHn MSRs Kai Huang
2021-01-20 12:03   ` Jarkko Sakkinen
2021-01-20 18:36     ` Dave Hansen
2021-01-20 23:36       ` Kai Huang
2021-01-20 23:50         ` Dave Hansen
2021-01-21  1:06           ` Kai Huang
2021-01-21  1:15             ` Dave Hansen
2021-01-21  1:44               ` Kai Huang
2021-01-21 14:36                 ` Jarkko Sakkinen
2021-01-21  1:18             ` Kai Huang
2021-01-21  1:09         ` Jarkko Sakkinen
2021-01-21  1:08       ` Jarkko Sakkinen
2021-01-18  3:28 ` [RFC PATCH v2 13/26] x86/sgx: Add helpers to expose ECREATE and EINIT to KVM Kai Huang
2021-01-20 12:04   ` Jarkko Sakkinen
2021-01-20 23:29     ` Kai Huang
2021-01-18  3:28 ` [RFC PATCH v2 14/26] x86/sgx: Move provisioning device creation out of SGX driver Kai Huang
2021-01-20 14:09   ` Jarkko Sakkinen
2021-01-20 23:24     ` Kai Huang
2021-01-18  3:28 ` [RFC PATCH v2 15/26] KVM: VMX: Convert vcpu_vmx.exit_reason to a union Kai Huang
2021-01-20 14:18   ` Jarkko Sakkinen
2021-01-20 16:39     ` Sean Christopherson
2021-01-21  0:47       ` Jarkko Sakkinen
2021-01-21 16:33         ` Sean Christopherson
2021-01-22 17:29           ` Jarkko Sakkinen
2021-01-18  3:28 ` [RFC PATCH v2 16/26] KVM: x86: Export kvm_mmu_gva_to_gpa_{read,write}() for SGX (VMX) Kai Huang
2021-01-20 14:19   ` Jarkko Sakkinen [this message]
2021-01-18  3:28 ` [RFC PATCH v2 17/26] KVM: x86: Define new #PF SGX error code bit Kai Huang
2021-01-18  3:28 ` [RFC PATCH v2 18/26] KVM: x86: Add support for reverse CPUID lookup of scattered features Kai Huang
2021-01-18  3:28 ` [RFC PATCH v2 19/26] KVM: x86: Add reverse-CPUID lookup support for scattered SGX features Kai Huang
2021-01-18  3:28 ` [RFC PATCH v2 20/26] KVM: VMX: Add basic handling of VM-Exit from SGX enclave Kai Huang
2021-01-18  3:28 ` [RFC PATCH v2 21/26] KVM: VMX: Frame in ENCLS handler for SGX virtualization Kai Huang
2021-01-18  3:28 ` [RFC PATCH v2 22/26] KVM: VMX: Add SGX ENCLS[ECREATE] handler to enforce CPUID restrictions Kai Huang
2021-01-18  3:28 ` [RFC PATCH v2 23/26] KVM: VMX: Add emulation of SGX Launch Control LE hash MSRs Kai Huang
2021-01-18  3:28 ` [RFC PATCH v2 24/26] KVM: VMX: Add ENCLS[EINIT] handler to support SGX Launch Control (LC) Kai Huang
2021-01-18  3:28 ` [RFC PATCH v2 25/26] KVM: VMX: Enable SGX virtualization for SGX1, SGX2 and LC Kai Huang
2021-01-18  3:29 ` [RFC PATCH v2 26/26] KVM: x86: Add capability to grant VM access to privileged SGX attribute Kai Huang
2021-01-19  8:23 ` [RFC PATCH v2 00/26] KVM SGX virtualization support Jarkko Sakkinen
2021-01-20  0:52   ` Kai Huang
2021-01-20 16:35     ` Sean Christopherson
2021-01-20 16:39       ` Paolo Bonzini
2021-01-21  1:28         ` Kai Huang
2021-01-20 23:43     ` Jarkko Sakkinen
2021-01-20 23:52       ` Kai Huang
2021-01-21  1:16         ` Jarkko Sakkinen
2021-01-21  1:27           ` Kai Huang
2021-01-21 14:34             ` Jarkko Sakkinen

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=YAg75hHsWm0j/pnJ@kernel.org \
    --to=jarkko@kernel.org \
    --cc=bp@alien8.de \
    --cc=dave.hansen@intel.com \
    --cc=haitao.huang@intel.com \
    --cc=hpa@zytor.com \
    --cc=jmattson@google.com \
    --cc=joro@8bytes.org \
    --cc=kai.huang@intel.com \
    --cc=kvm@vger.kernel.org \
    --cc=linux-sgx@vger.kernel.org \
    --cc=luto@kernel.org \
    --cc=mingo@redhat.com \
    --cc=pbonzini@redhat.com \
    --cc=seanjc@google.com \
    --cc=tglx@linutronix.de \
    --cc=vkuznets@redhat.com \
    --cc=wanpengli@tencent.com \
    --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).