From patchwork Tue Dec 19 16:10:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul Durrant X-Patchwork-Id: 756281 Received: from mail.xenproject.org (mail.xenproject.org [104.130.215.37]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4DEF932C7E; Tue, 19 Dec 2023 16:40:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=xen.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=xen.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=xen.org header.i=@xen.org header.b="hsZMXagx" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=xen.org; s=20200302mail; h=Content-Transfer-Encoding:MIME-Version:Message-Id:Date: Subject:To:From; bh=57goH/6cxWcfb2OLWV035vnGe0L7dKUP3rllvb9LgIs=; b=hsZMXagxd cneDEkY2R/4JhDHQzttdGTXVeDlha3N1T0dvRckqsk7l8a5nyGGcgpO9J0HCWXnFxbRkaFsDAsAfq 3kQCy//4muUSBMnUXYg7O6X45vJezwtjk3Tv3sTKBbBDmOIzqBMPh0AP0DMAv/mSUWKPNx4dD77u7 8aSccXfU=; Received: from xenbits.xenproject.org ([104.239.192.120]) by mail.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1rFcjo-0005Le-46; Tue, 19 Dec 2023 16:14:32 +0000 Received: from 54-240-197-226.amazon.com ([54.240.197.226] helo=REM-PW02S00X.ant.amazon.com) by xenbits.xenproject.org with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1rFcjn-0005h9-NZ; Tue, 19 Dec 2023 16:14:31 +0000 From: Paul Durrant To: Paolo Bonzini , Jonathan Corbet , Sean Christopherson , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , David Woodhouse , Paul Durrant , Shuah Khan , kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org Subject: [PATCH v11 00/19] KVM: xen: update shared_info and vcpu_info handling Date: Tue, 19 Dec 2023 16:10:50 +0000 Message-Id: <20231219161109.1318-1-paul@xen.org> X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Paul Durrant This series has some small fixes from what was in version 10 [1]: * KVM: pfncache: allow a cache to be activated with a fixed (userspace) HVA This required a small fix to kvm_gpc_check() for an error that was introduced in version 8. * KVM: xen: separate initialization of shared_info cache and content This accidentally regressed a fix in commit 5d6d6a7d7e66a ("KVM: x86: Refine calculation of guest wall clock to use a single TSC read"). * KVM: xen: re-initialize shared_info if guest (32/64-bit) mode is set This mistakenly removed the initialization of shared_info from the code setting the KVM_XEN_ATTR_TYPE_SHARED_INFO attribute, which broke the self- tests. * KVM: xen: split up kvm_xen_set_evtchn_fast() This had a /32 and a /64 swapped in set_vcpu_info_evtchn_pending(). [1] https://lore.kernel.org/kvm/20231204144334.910-1-paul@xen.org/ Paul Durrant (19): KVM: pfncache: Add a map helper function KVM: pfncache: remove unnecessary exports KVM: xen: mark guest pages dirty with the pfncache lock held KVM: pfncache: add a mark-dirty helper KVM: pfncache: remove KVM_GUEST_USES_PFN usage KVM: pfncache: stop open-coding offset_in_page() KVM: pfncache: include page offset in uhva and use it consistently KVM: pfncache: allow a cache to be activated with a fixed (userspace) HVA KVM: xen: separate initialization of shared_info cache and content KVM: xen: re-initialize shared_info if guest (32/64-bit) mode is set KVM: xen: allow shared_info to be mapped by fixed HVA KVM: xen: allow vcpu_info to be mapped by fixed HVA KVM: selftests / xen: map shared_info using HVA rather than GFN KVM: selftests / xen: re-map vcpu_info using HVA rather than GPA KVM: xen: advertize the KVM_XEN_HVM_CONFIG_SHARED_INFO_HVA capability KVM: xen: split up kvm_xen_set_evtchn_fast() KVM: xen: don't block on pfncache locks in kvm_xen_set_evtchn_fast() KVM: pfncache: check the need for invalidation under read lock first KVM: xen: allow vcpu_info content to be 'safely' copied Documentation/virt/kvm/api.rst | 53 ++- arch/x86/kvm/x86.c | 7 +- arch/x86/kvm/xen.c | 360 +++++++++++------- include/linux/kvm_host.h | 40 +- include/linux/kvm_types.h | 8 - include/uapi/linux/kvm.h | 9 +- .../selftests/kvm/x86_64/xen_shinfo_test.c | 59 ++- virt/kvm/pfncache.c | 188 ++++----- 8 files changed, 466 insertions(+), 258 deletions(-) base-commit: f2a3fb7234e52f72ff4a38364dbf639cf4c7d6c6