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From: Sean Christopherson <seanjc@google.com>
To: Paolo Bonzini <pbonzini@redhat.com>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Andy Lutomirski <luto@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>
Cc: Sean Christopherson <seanjc@google.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
	kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	Borislav Petkov <bp@suse.de>,
	Tom Lendacky <thomas.lendacky@amd.com>,
	Brijesh Singh <brijesh.singh@amd.com>
Subject: [PATCH v2 00/14] KVM: SVM: Misc SEV cleanups
Date: Wed, 13 Jan 2021 16:36:54 -0800	[thread overview]
Message-ID: <20210114003708.3798992-1-seanjc@google.com> (raw)

Minor bug fixes and refactorings of SEV related code, mainly to clean up
the KVM code for tracking whether or not SEV and SEV-ES are enabled.  E.g.
KVM has both sev_es and svm_sev_enabled(), and a global 'sev' flag while
also using 'sev' as a local variable in several places.

Based on kvm/master, commit 872f36eb0b0f ("KVM: x86: __kvm_vcpu_halt can
be static").

v2:
 - Remove the kernel's sev_enabled instead of renaming it to sev_guest.
 - Fix various build issues. [Tom]
 - Remove stable tag from the patch to free sev_asid_bitmap.  Keeping the
   bitmap on failure is truly only a leak once svm_sev_enabled() is
   dropped later in the series.  It's still arguably a fix since KVM will
   unnecessarily keep memory, but it's not stable material. [Tom]
 - Collect one Ack. [Tom]

v1:
 - https://lkml.kernel.org/r/20210109004714.1341275-1-seanjc@google.com

Sean Christopherson (14):
  KVM: SVM: Zero out the VMCB array used to track SEV ASID association
  KVM: SVM: Free sev_asid_bitmap during init if SEV setup fails
  KVM: SVM: Move SEV module params/variables to sev.c
  x86/cpufeatures: Assign dedicated feature word for AMD mem encryption
  KVM: x86: Override reported SME/SEV feature flags with host mask
  x86/sev: Drop redundant and potentially misleading 'sev_enabled'
  KVM: SVM: Append "_enabled" to module-scoped SEV/SEV-ES control
    variables
  KVM: SVM: Condition sev_enabled and sev_es_enabled on
    CONFIG_KVM_AMD_SEV=y
  KVM: SVM: Unconditionally invoke sev_hardware_teardown()
  KVM: SVM: Explicitly check max SEV ASID during sev_hardware_setup()
  KVM: SVM: Move SEV VMCB tracking allocation to sev.c
  KVM: SVM: Drop redundant svm_sev_enabled() helper
  KVM: SVM: Remove an unnecessary prototype declaration of
    sev_flush_asids()
  KVM: SVM: Skip SEV cache flush if no ASIDs have been used

 arch/x86/include/asm/cpufeature.h             |  7 +-
 arch/x86/include/asm/cpufeatures.h            | 17 +++--
 arch/x86/include/asm/disabled-features.h      |  3 +-
 arch/x86/include/asm/mem_encrypt.h            |  1 -
 arch/x86/include/asm/required-features.h      |  3 +-
 arch/x86/kernel/cpu/common.c                  |  3 +
 arch/x86/kernel/cpu/scattered.c               |  5 --
 arch/x86/kvm/cpuid.c                          |  2 +
 arch/x86/kvm/cpuid.h                          |  1 +
 arch/x86/kvm/svm/sev.c                        | 71 +++++++++++++------
 arch/x86/kvm/svm/svm.c                        | 35 +++------
 arch/x86/kvm/svm/svm.h                        |  8 +--
 arch/x86/mm/mem_encrypt.c                     | 12 ++--
 arch/x86/mm/mem_encrypt_identity.c            |  1 -
 .../arch/x86/include/asm/disabled-features.h  |  3 +-
 .../arch/x86/include/asm/required-features.h  |  3 +-
 16 files changed, 96 insertions(+), 79 deletions(-)

-- 
2.30.0.284.gd98b1dd5eaa7-goog


             reply	other threads:[~2021-01-14  1:49 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-14  0:36 Sean Christopherson [this message]
2021-01-14  0:36 ` [PATCH v2 01/14] KVM: SVM: Zero out the VMCB array used to track SEV ASID association Sean Christopherson
2021-01-14 15:56   ` Tom Lendacky
2021-01-14 17:13     ` Sean Christopherson
2021-01-14 20:57   ` Brijesh Singh
2021-01-14  0:36 ` [PATCH v2 02/14] KVM: SVM: Free sev_asid_bitmap during init if SEV setup fails Sean Christopherson
2021-01-14 15:49   ` Tom Lendacky
2021-01-14 17:12     ` Sean Christopherson
2021-01-14 18:02       ` Tom Lendacky
2021-01-14 19:17         ` Sean Christopherson
2021-01-14  0:36 ` [PATCH v2 03/14] KVM: SVM: Move SEV module params/variables to sev.c Sean Christopherson
2021-01-14 19:07   ` Tom Lendacky
2021-01-14 20:59   ` Brijesh Singh
2021-01-14  0:36 ` [PATCH v2 04/14] x86/cpufeatures: Assign dedicated feature word for AMD mem encryption Sean Christopherson
2021-01-14 11:35   ` Borislav Petkov
2021-01-14 17:09     ` Sean Christopherson
2021-01-14 17:16       ` Borislav Petkov
2021-01-28 15:09         ` Paolo Bonzini
2021-01-14 21:17   ` Brijesh Singh
2021-01-14  0:36 ` [PATCH v2 05/14] KVM: x86: Override reported SME/SEV feature flags with host mask Sean Christopherson
2021-01-14 21:18   ` Brijesh Singh
2021-01-28 15:07   ` Paolo Bonzini
2021-01-28 17:09     ` Sean Christopherson
2021-01-28 17:25       ` Paolo Bonzini
2021-01-14  0:37 ` [PATCH v2 06/14] x86/sev: Drop redundant and potentially misleading 'sev_enabled' Sean Christopherson
2021-01-14 17:54   ` Tom Lendacky
2021-01-14 21:24   ` Brijesh Singh
2021-01-14  0:37 ` [PATCH v2 07/14] KVM: SVM: Append "_enabled" to module-scoped SEV/SEV-ES control variables Sean Christopherson
2021-01-14 21:28   ` Brijesh Singh
2021-01-14  0:37 ` [PATCH v2 08/14] KVM: SVM: Condition sev_enabled and sev_es_enabled on CONFIG_KVM_AMD_SEV=y Sean Christopherson
2021-01-14 20:56   ` Tom Lendacky
2021-01-14 21:28   ` Brijesh Singh
2021-01-14  0:37 ` [PATCH v2 09/14] KVM: SVM: Unconditionally invoke sev_hardware_teardown() Sean Christopherson
2021-01-14 21:26   ` Tom Lendacky
2021-01-14 21:32   ` Brijesh Singh
2021-01-14  0:37 ` [PATCH v2 10/14] KVM: SVM: Explicitly check max SEV ASID during sev_hardware_setup() Sean Christopherson
2021-01-14 21:35   ` Brijesh Singh
2021-01-14 21:49   ` Tom Lendacky
2021-01-14  0:37 ` [PATCH v2 11/14] KVM: SVM: Move SEV VMCB tracking allocation to sev.c Sean Christopherson
2021-01-14 21:37   ` Brijesh Singh
2021-01-14 21:53     ` Tom Lendacky
2021-01-14 22:15   ` Tom Lendacky
2021-01-14  0:37 ` [PATCH v2 12/14] KVM: SVM: Drop redundant svm_sev_enabled() helper Sean Christopherson
2021-01-14 21:44   ` Brijesh Singh
2021-01-14 22:51   ` Tom Lendacky
2021-01-14  0:37 ` [PATCH v2 13/14] KVM: SVM: Remove an unnecessary prototype declaration of sev_flush_asids() Sean Christopherson
2021-01-14 21:45   ` Brijesh Singh
2021-01-14 22:53   ` Tom Lendacky
2021-01-14  0:37 ` [PATCH v2 14/14] KVM: SVM: Skip SEV cache flush if no ASIDs have been used Sean Christopherson
2021-01-15 15:07   ` Tom Lendacky
2021-01-15 17:19     ` Sean Christopherson
2021-01-28 15:10   ` Paolo Bonzini
2021-01-28 16:29     ` Sean Christopherson
2021-01-28 16:59       ` Paolo Bonzini

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