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 05/25] x86/sgx: Introduce virtual EPC for use by KVM guests
Date: Mon, 1 Mar 2021 08:21:19 -0800 [thread overview]
Message-ID: <YD0Uf1LS4jDlXGLo@google.com> (raw)
In-Reply-To: <aade4006c3474175f97ec149a969eb02f1720a89.1614590788.git.kai.huang@intel.com>
On Mon, Mar 01, 2021, Kai Huang wrote:
> + /*
> + * SECS pages are "pinned" by child pages, an unpinned once all
s/an/and
> + * children have been EREMOVE'd. A child page in this instance
> + * may have pinned an SECS page encountered in an earlier release(),
> + * creating a zombie. Since some children were EREMOVE'd above,
> + * try to EREMOVE all zombies in the hopes that one was unpinned.
> + */
> + mutex_lock(&zombie_secs_pages_lock);
> + list_for_each_entry_safe(epc_page, tmp, &zombie_secs_pages, list) {
> + /*
> + * Speculatively remove the page from the list of zombies,
> + * if the page is successfully EREMOVE it will be added to
> + * the list of free pages. If EREMOVE fails, throw the page
> + * on the local list, which will be spliced on at the end.
> + */
> + list_del(&epc_page->list);
> +
> + if (sgx_vepc_free_page(epc_page))
> + list_add_tail(&epc_page->list, &secs_pages);
> + }
> +
> + if (!list_empty(&secs_pages))
> + list_splice_tail(&secs_pages, &zombie_secs_pages);
> + mutex_unlock(&zombie_secs_pages_lock);
> +
> + kfree(vepc);
> +
> + return 0;
> +}
next prev parent reply other threads:[~2021-03-01 17:04 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-01 9:44 [PATCH 00/25] KVM SGX virtualization support Kai Huang
2021-03-01 9:44 ` [PATCH 01/25] x86/cpufeatures: Make SGX_LC feature bit depend on SGX bit Kai Huang
2021-03-01 9:44 ` [PATCH 02/25] x86/cpufeatures: Add SGX1 and SGX2 sub-features Kai Huang
2021-03-01 10:00 ` Borislav Petkov
2021-03-01 10:19 ` Kai Huang
2021-03-01 10:30 ` Borislav Petkov
2021-03-01 10:40 ` Kai Huang
2021-03-01 10:53 ` Borislav Petkov
2021-03-01 11:28 ` Kai Huang
2021-03-01 11:32 ` Borislav Petkov
2021-03-01 11:43 ` Kai Huang
2021-03-01 11:58 ` Borislav Petkov
2021-03-01 12:08 ` Kai Huang
2021-03-02 15:48 ` Haitao Huang
2021-03-02 15:58 ` Dave Hansen
2021-03-07 22:49 ` Kai Huang
2021-03-10 15:30 ` Jarkko Sakkinen
2021-03-02 16:02 ` Sean Christopherson
2021-03-02 17:53 ` Boris Petkov
2021-03-02 18:27 ` Kai Huang
2021-03-01 9:44 ` [PATCH 03/25] x86/sgx: Wipe out EREMOVE from sgx_free_epc_page() Kai Huang
2021-03-01 17:29 ` Sean Christopherson
2021-03-02 0:32 ` Kai Huang
2021-03-01 9:44 ` [PATCH 04/25] x86/sgx: Add SGX_CHILD_PRESENT hardware error code Kai Huang
2021-03-01 9:44 ` [PATCH 05/25] x86/sgx: Introduce virtual EPC for use by KVM guests Kai Huang
2021-03-01 16:21 ` Sean Christopherson [this message]
2021-03-02 0:33 ` Kai Huang
2021-03-01 9:45 ` [PATCH 06/25] x86/cpu/intel: Allow SGX virtualization without Launch Control support Kai Huang
2021-03-05 17:29 ` Borislav Petkov
2021-03-07 23:50 ` Kai Huang
2021-03-08 0:19 ` Kai Huang
2021-03-10 15:32 ` Jarkko Sakkinen
2021-03-01 9:45 ` [PATCH 07/25] x86/sgx: Initialize virtual EPC driver even when SGX driver is disabled Kai Huang
2021-03-01 9:45 ` [PATCH 08/25] x86/sgx: Expose SGX architectural definitions to the kernel Kai Huang
2021-03-01 9:45 ` [PATCH 09/25] x86/sgx: Move ENCLS leaf definitions to sgx.h Kai Huang
2021-03-01 16:25 ` Sean Christopherson
2021-03-02 0:34 ` Kai Huang
2021-03-01 9:45 ` [PATCH 10/25] x86/sgx: Add SGX2 ENCLS leaf definitions (EAUG, EMODPR and EMODT) Kai Huang
2021-03-01 9:45 ` [PATCH 11/25] x86/sgx: Add encls_faulted() helper Kai Huang
2021-03-01 9:45 ` [PATCH 12/25] x86/sgx: Add helper to update SGX_LEPUBKEYHASHn MSRs Kai Huang
2021-03-01 16:57 ` Sean Christopherson
2021-03-02 0:34 ` Kai Huang
2021-03-01 9:45 ` [PATCH 13/25] x86/sgx: Add helpers to expose ECREATE and EINIT to KVM Kai Huang
2021-03-01 9:45 ` [PATCH 14/25] x86/sgx: Move provisioning device creation out of SGX driver Kai Huang
2021-03-01 9:45 ` [PATCH 15/25] KVM: x86: Export kvm_mmu_gva_to_gpa_{read,write}() for SGX (VMX) Kai Huang
2021-03-01 9:45 ` [PATCH 16/25] KVM: x86: Define new #PF SGX error code bit Kai Huang
2021-03-01 9:45 ` [PATCH 17/25] KVM: x86: Add support for reverse CPUID lookup of scattered features Kai Huang
2021-03-01 9:45 ` [PATCH 18/25] KVM: x86: Add reverse-CPUID lookup support for scattered SGX features Kai Huang
2021-03-01 9:45 ` [PATCH 19/25] KVM: VMX: Add basic handling of VM-Exit from SGX enclave Kai Huang
2021-03-01 16:52 ` Sean Christopherson
2021-03-02 0:50 ` Kai Huang
2021-03-01 9:45 ` [PATCH 20/25] KVM: VMX: Frame in ENCLS handler for SGX virtualization Kai Huang
2021-03-01 9:45 ` [PATCH 21/25] KVM: VMX: Add SGX ENCLS[ECREATE] handler to enforce CPUID restrictions Kai Huang
2021-03-01 17:20 ` Sean Christopherson
2021-03-02 0:54 ` Kai Huang
2021-03-02 5:34 ` Kai Huang
2021-03-02 8:44 ` Kai Huang
2021-03-01 9:45 ` [PATCH 22/25] KVM: VMX: Add emulation of SGX Launch Control LE hash MSRs Kai Huang
2021-03-01 9:45 ` [PATCH 23/25] KVM: VMX: Add ENCLS[EINIT] handler to support SGX Launch Control (LC) Kai Huang
2021-03-01 9:45 ` [PATCH 24/25] KVM: VMX: Enable SGX virtualization for SGX1, SGX2 and LC Kai Huang
2021-03-01 9:46 ` [PATCH 25/25] KVM: x86: Add capability to grant VM access to privileged SGX attribute Kai Huang
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