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Tue, 18 Jul 2023 09:22:26 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7D5E120063; Tue, 18 Jul 2023 09:22:24 +0000 (GMT) Received: from li-1901474c-32f3-11b2-a85c-fc5ff2c001f3.in.ibm.com (unknown [9.109.242.129]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 18 Jul 2023 09:22:24 +0000 (GMT) From: Harsh Prateek Bora To: qemu-ppc@nongnu.org, qemu-devel@nongnu.org Cc: mikey@neuling.org, vaibhav@linux.ibm.com, jniethe5@gmail.com, sbhat@linux.ibm.com, kconsul@linux.vnet.ibm.com, dbarboza@ventanamicro.com, npiggin@gmail.com Subject: [PATCH 00/15] Nested PAPR API (KVM on PowerVM) Date: Tue, 18 Jul 2023 14:52:06 +0530 Message-Id: <20230718092221.1053686-1-harshpb@linux.ibm.com> X-Mailer: git-send-email 2.39.3 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: k8QcZkUEmw2c40OgxejNFq7HmF1DN4SB X-Proofpoint-ORIG-GUID: vqZ9haCZC2Q6YhILbuEQE5-X3fpRQBGE X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-07-17_15,2023-07-13_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 mlxlogscore=749 lowpriorityscore=0 phishscore=0 mlxscore=0 suspectscore=0 bulkscore=0 impostorscore=0 spamscore=0 priorityscore=1501 clxscore=1011 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2306200000 definitions=main-2307180082 Received-SPF: pass client-ip=148.163.156.1; envelope-from=harshpb@linux.ibm.com; helo=mx0a-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org There is an existing Nested-HV API to enable nested guests on powernv machines. However, that is not supported on pseries/PowerVM LPARs. This patch series implements required hcall interfaces to enable nested guests with KVM on PowerVM. Unlike Nested-HV, with this API, entire L2 state is retained by L0 during guest entry/exit and uses pre-defined Guest State Buffer (GSB) format to communicate guest state between L1 and L2 via L0. L0 here refers to the phyp/PowerVM, or launching a Qemu TCG L0 with the newly introduced option cap-nested-papr=true (refer patch 5/15). L1 refers to the LPAR host on PowerVM or Linux booted on Qemu TCG with above mentioned option cap-nested-papr=true. L2 refers to nested guest running on top of L1 using KVM. No SW changes needed for Qemu running in L1 Linux as well as L2 Kernel. There is a Linux Kernel side patch series to enable support for Nested PAPR in L1 and same can be found at below url: Linux Kernel RFC PATCH v2: - https://lore.kernel.org/linuxppc-dev/20230605064848.12319-1-jpn@linux.vnet.ibm.com/ For more details, documentation can be referred in either of patch series. There are scripts available to assist in setting up an environment for testing nested guests at https://github.com/mikey/kvm-powervm-test Thanks to Michael Neuling, Shivaprasad Bhat, Kautuk Consul, Vaibhav Jain and Jordan Niethe. Harsh Prateek Bora (15): ppc: spapr: Introduce Nested PAPR API related macros ppc: spapr: Add new/extend structs to support Nested PAPR API ppc: spapr: Use SpaprMachineStateNested's ptcr instead of nested_ptcr ppc: spapr: Start using nested.api for nested kvm-hv api ppc: spapr: Introduce cap-nested-papr for nested PAPR API ppc: spapr: Implement nested PAPR hcall - H_GUEST_GET_CAPABILITIES ppc: spapr: Implement nested PAPR hcall - H_GUEST_SET_CAPABILITIES ppc: spapr: Implement nested PAPR hcall - H_GUEST_CREATE ppc: spapr: Implement nested PAPR hcall - H_GUEST_CREATE_VCPU ppc: spapr: Initialize the GSB Elements lookup table. ppc: spapr: Implement nested PAPR hcall - H_GUEST_[GET|SET]_STATE ppc: spapr: Use correct source for parttbl info for nested PAPR API. ppc: spapr: Implement nested PAPR hcall - H_GUEST_RUN_VCPU ppc: spapr: Implement nested PAPR hcall - H_GUEST_DELETE ppc: spapr: Document Nested PAPR API docs/devel/nested-papr.txt | 500 ++++++++++ hw/ppc/spapr.c | 28 +- hw/ppc/spapr_caps.c | 50 + hw/ppc/spapr_hcall.c | 1 + hw/ppc/spapr_nested.c | 1504 +++++++++++++++++++++++++++++-- include/hw/ppc/ppc.h | 2 + include/hw/ppc/spapr.h | 35 +- include/hw/ppc/spapr_cpu_core.h | 7 +- include/hw/ppc/spapr_nested.h | 378 ++++++++ target/ppc/cpu.h | 2 + 10 files changed, 2433 insertions(+), 74 deletions(-) create mode 100644 docs/devel/nested-papr.txt