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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:message-id:mime-version:subject:from:to:cc; bh=7p7mJlnVfl7T+hlkAFYQVL3Is2jTnSQaIAIQgTOcTTk=; b=o6bCpPq2GtEycI7Hl8ZuQyZzxULHek6KkEWV657/XDCSXpxpjEaRNDw+ogM3ffL/kP gVQ8JVTSbVYkU8cBKd6HO7qTlZ/YpbHjBRd3S01m6+JM5Ck2autT9cgAdurNZPf3jrma aKphBY7Ak6CSahTqJHaplo5/EgM8kHskpu4Nt2lifAeWFlI+bUEBfRA4Z1CYfTVNXEqt a2UP6KKCgerA5KTkzFICh9hy5lqs5VtZJchzXmzMbbEGounqjc1n6PcnH7400slh0aeU L/J9OzMerl5DDPrErKFEKaWG+48Nkkd2hkMQuEUQyHhNQdyMab6R5AcXVikJwK6poYPq +xLA== X-Gm-Message-State: AOAM5335J5dG2/V+eYpTt9VGBtVyyQxwnyQ4emd4WREgEQpIRhBoRxv9 iBUnK1xxmYq3kHCXUFnoDTZjc//khy4= X-Google-Smtp-Source: ABdhPJwgN1HZ3KJQEcy/2zN9k/TS5BpBTtk4TBxtE7nS2taL/Exse1zhnY7xm/INDrcGXMRjZGi0yvlXbY0= X-Received: from oupton.c.googlers.com ([fda3:e722:ac3:cc00:2b:ff92:c0a8:404]) (user=oupton job=sendgmr) by 2002:a05:6214:18c7:: with SMTP id cy7mr17647152qvb.59.1627932493300; Mon, 02 Aug 2021 12:28:13 -0700 (PDT) Date: Mon, 2 Aug 2021 19:28:06 +0000 Message-Id: <20210802192809.1851010-1-oupton@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.32.0.554.ge1b32706d8-goog Subject: [PATCH v3 0/3] KVM: arm64: Use generic guest entry infrastructure From: Oliver Upton To: kvmarm@lists.cs.columbia.edu Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Paolo Bonzini , Marc Zyngier , James Morse , Alexandru Elisei , Suzuki K Poulose , Catalin Marinas , Will Deacon , Thomas Gleixner , Peter Zijlstra , Andy Lutomirski , linux-arm-kernel@lists.infradead.org, Peter Shier , Shakeel Butt , Guangyu Shi , Oliver Upton X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210802_122815_478335_B8F12CB6 X-CRM114-Status: GOOD ( 12.58 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The arm64 kernel doesn't yet support the full generic entry infrastructure. That being said, KVM/arm64 doesn't properly handle TIF_NOTIFY_RESUME and could pick this up by switching to the generic guest entry infrasturture. Patch 1 adds a missing vCPU stat to ARM64 to record the number of signal exits to userspace. Patch 2 unhitches entry-kvm from entry-generic, as ARM64 doesn't currently support the generic infrastructure. Patch 3 replaces the open-coded entry handling with the generic xfer function. This series was tested on an Ampere Mt. Jade reference system. The series cleanly applies to kvm/queue (note that this is deliberate as the generic kvm stats patches have not yet propagated to kvm-arm/queue) at the following commit: 8ad5e63649ff ("KVM: Don't take mmu_lock for range invalidation unless necessary") v1 -> v2: - Address Jing's comment - Carry Jing's r-b tag v2 -> v3: - Roll all exit conditions into kvm_vcpu_exit_request() (Marc) - Avoid needlessly checking for work twice (Marc) v1: http://lore.kernel.org/r/20210729195632.489978-1-oupton@google.com v2: http://lore.kernel.org/r/20210729220916.1672875-1-oupton@google.com Oliver Upton (3): KVM: arm64: Record number of signal exits as a vCPU stat entry: KVM: Allow use of generic KVM entry w/o full generic support KVM: arm64: Use generic KVM xfer to guest work function arch/arm64/include/asm/kvm_host.h | 1 + arch/arm64/kvm/Kconfig | 1 + arch/arm64/kvm/arm.c | 71 +++++++++++++++++++------------ arch/arm64/kvm/guest.c | 1 + include/linux/entry-kvm.h | 6 ++- 5 files changed, 52 insertions(+), 28 deletions(-)