Message ID | 20230404121236.263332-1-aleksandr.mikhalitsyn@canonical.com |
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([95.91.208.118]) by smtp.gmail.com with ESMTPSA id xh12-20020a170906da8c00b00947ccb6150bsm5182481ejb.102.2023.04.04.05.13.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 04 Apr 2023 05:13:06 -0700 (PDT) From: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com> To: pbonzini@redhat.com Cc: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>, Sean Christopherson <seanjc@google.com>, =?utf-8?q?St=C3=A9phane_Graber?= <stgraber@ubuntu.com>, kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/2] KVM: SVM: small tweaks for sev_hardware_setup Date: Tue, 4 Apr 2023 14:12:34 +0200 Message-Id: <20230404121236.263332-1-aleksandr.mikhalitsyn@canonical.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-2.5 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_MED,SPF_HELO_NONE, SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: <linux-kernel.vger.kernel.org> X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1762248242759431558?= X-GMAIL-MSGID: =?utf-8?q?1762248242759431558?= |
Series |
KVM: SVM: small tweaks for sev_hardware_setup
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Message
Aleksandr Mikhalitsyn
April 4, 2023, 12:12 p.m. UTC
KVM: SVM: add some info prints to SEV init
Let's add a few pr_info's to sev_hardware_setup to make SEV/SEV-ES
enabling a little bit handier for users. Right now it's too hard
to guess why SEV/SEV-ES are failing to enable.
There are a few reasons.
SEV:
- npt is disabled (module parameter)
- CPU lacks some features (sev, decodeassists)
- Maximum SEV ASID is 0
SEV-ES:
- mmio_caching is disabled (module parameter)
- CPU lacks sev_es feature
- Minimum SEV ASID value is 1 (can be adjusted in BIOS/UEFI)
==
KVM: SVM: free sev_*asid_bitmap init if SEV init fails
If misc_cg_set_capacity() fails for some reason then we have
a memleak for sev_reclaim_asid_bitmap/sev_asid_bitmap. It's
not a case right now, because misc_cg_set_capacity() just can't
fail and check inside it is always successful.
But let's fix that for code consistency.
Cc: Sean Christopherson <seanjc@google.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Stéphane Graber <stgraber@ubuntu.com>
Cc: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>
Alexander Mikhalitsyn (2):
KVM: SVM: free sev_*asid_bitmap init if SEV init fails
KVM: SVM: add some info prints to SEV init
arch/x86/kvm/svm/sev.c | 34 +++++++++++++++++++++++++++-------
1 file changed, 27 insertions(+), 7 deletions(-)