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Sat, 19 Sep 2026 08:59:54 +0000 (GMT) Received: from [9.61.240.148] (unknown [9.61.240.148]) by smtpav02.wdc07v.mail.ibm.com (Postfix) with ESMTPS; Sat, 19 Sep 2026 08:59:53 +0000 (GMT) Message-ID: Date: Sat, 19 Sep 2026 14:29:51 +0530 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 0/3] KVM: selftests: add powerpc support To: "Ritesh Harjani (IBM)" , kvm@vger.kernel.org Cc: Sean Christopherson , Paolo Bonzini , Michael Ellerman , Christophe Leroy , Anushree Mathur , Venkat Rao Bagalkote , Harsh Prateek Bora , Claudio Imbrenda , Madhavan Srinivasan , Shrikanth Hegde , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org References: Content-Language: en-US From: Anushree Mathur In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-ORIG-GUID: nbyZhj10j4HSmrVirrZNE6vYozTVfAlN X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTE5MDEyMiBTYWx0ZWRfXxHeZ/+jmKAxM TnHQO+FYUGAQisd8y/YAHMCF+AnkWE/Hn3MYQOlLLQ/0fNJmZs7zzkYc54A0y9xoYQs+5DJBAHo t/Fx48Qk9J8zM7F6kNdSGQ5JqCDs7xiR96NMkJgLvTikLJka8PHvu6EXp1L8GZgO8zR98m2cgTX raOh09zdwtzxRvS6hdCKBAXCjfWsU/h1AbvrgXY4oPkR5wrRkKM6fE0fdUMWF1lMi0kKhBDDKVv r7bVE78ZCGn+oq/E6Osov7skyp1pLhpA1qRgcSiwm7I0e17VWKslyDyvWEcTdMwPpQjGa81VU1w I/2AvDjza84607aNlslcnNhYHLWXXxA7kStfk+OIoCDbIfZMu3BcjgTYrmdOu06aXcGR4NZRZyy jkj2smXFtu5BQn3q232wTc2gnrfCG0UuZdK5RBq3ce8o9a3V3uxeAoCc1suyYD6NMz49fZ0+PQn M88URShiUyFA9IlQePw== X-Authority-Analysis: v=2.4 cv=O/KsLx9W c=1 sm=1 tr=0 ts=6aae4f11 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=Y2IxJ9c9Rs8Kov3niI8_:22 a=VwQbUJbxAAAA:8 a=1XWaLZrsAAAA:8 a=pGLkceISAAAA:8 a=VnNF1IyMAAAA:8 a=slw3on1wiaYrNECQpKkA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 X-Proofpoint-Spam-Info: AW1haW4tMjYwOTE5MDEyMiBTYWx0ZWRfX9+bf4muBJ1HJ u7hAP0Qz9BFYBzr8+Qd6F6QBXyuVoRIM/PyXz1mxxI6LUCGYcKg9hsxX9i+cDWzKUJO9epQ4Olq VcJnLlIGu9WM1dDLwVbD+/DxYtmdLf8= X-Proofpoint-GUID: BlFKGXdZLDZzyN2VUSB3kEmvHnNTbQy8 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-19_02,2026-09-16_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1011 malwarescore=0 phishscore=0 impostorscore=0 suspectscore=0 bulkscore=0 priorityscore=1501 lowpriorityscore=0 adultscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609190122 On 11/09/26 10:18 AM, Ritesh Harjani (IBM) wrote: > PATCH v3 -> PATCH v4: > ================== > - Rebased on top of Sean's new page allocator patch series v2 [1] > This allowed to drop and patch-2 since it will now come from Sean's > v2. > - Addressed review comments from Sean - squashed patches 6-10 in patch-1 of > this. > - Dropped patch-5 to print vcpu_id when KVM_CREATE_VCPU ioctl fails. > - Added additional patch-3 to this series to allow dirty_log_test to run on all > big-endian machines. > > [1]: https://lore.kernel.org/kvm/20260902164123.2546762-1-seanjc@google.com/ > [v3]: https://lore.kernel.org/linuxppc-dev/2d2c46be7f051c7f1c645afaec67f57067d37a81.1781093720.git.ritesh.list@gmail.com/ > > Testing updates: > ================ > I have done some fair amount of testing of the selftests both on real HW and > using various combinations on qemu (powernv+LE (default), pseries+cap-nested-hv, > pseries+cap-nested-papr, powernv+BE). There were few powerpc kvm kernel fixes > which were identified as part of this work. I will send those patches separately > as those anyway needs to go in separately. > > > ======================================================= > > Hi All, > > This series primarly adds KVM selftests support for powerpc (64-bit, BookS, > radix MMU). > > This patch series is originally Nick's work. I have mainly only rebased it on > the latest upstream tree. Since the rebase required few changes to all the four > patches (Patch 1-4), I have dropped the earlier Acked-by from Michael Ellerman. > > Since the last series was posted three years ago [1], I am resetting the version > to RFC. This rebase was done as part of a larger effort to improve the selftests > infrastructure for Linux on PowerPC tree. Thanks to Harsh and Maddy for their > help on this. > > Nicholas Piggin (1): > KVM: PPC: selftests: add support for powerpc > > Ritesh Harjani (IBM) (2): > KVM: PPC: selftests: powerpc enable kvm_create_max_vcpus test > KVM: selftests: Use LE bitops for dirty bitmaps on all big-endian > hosts > > MAINTAINERS | 2 + > tools/testing/selftests/kvm/Makefile | 2 +- > tools/testing/selftests/kvm/Makefile.kvm | 10 + > tools/testing/selftests/kvm/dirty_log_test.c | 12 +- > .../testing/selftests/kvm/include/kvm_util.h | 9 + > .../selftests/kvm/include/powerpc/hcall.h | 17 + > .../kvm/include/powerpc/kvm_util_arch.h | 22 + > .../selftests/kvm/include/powerpc/ppc_asm.h | 32 ++ > .../selftests/kvm/include/powerpc/processor.h | 39 ++ > .../selftests/kvm/include/powerpc/ucall.h | 21 + > .../selftests/kvm/kvm_create_max_vcpus.c | 8 +- > tools/testing/selftests/kvm/lib/guest_modes.c | 20 +- > tools/testing/selftests/kvm/lib/kvm_util.c | 8 + > .../selftests/kvm/lib/powerpc/handlers.S | 93 ++++ > .../testing/selftests/kvm/lib/powerpc/hcall.c | 45 ++ > .../selftests/kvm/lib/powerpc/processor.c | 512 ++++++++++++++++++ > .../testing/selftests/kvm/lib/powerpc/ucall.c | 22 + > 17 files changed, 862 insertions(+), 12 deletions(-) > create mode 100644 tools/testing/selftests/kvm/include/powerpc/hcall.h > create mode 100644 tools/testing/selftests/kvm/include/powerpc/kvm_util_arch.h > create mode 100644 tools/testing/selftests/kvm/include/powerpc/ppc_asm.h > create mode 100644 tools/testing/selftests/kvm/include/powerpc/processor.h > create mode 100644 tools/testing/selftests/kvm/include/powerpc/ucall.h > create mode 100644 tools/testing/selftests/kvm/lib/powerpc/handlers.S > create mode 100644 tools/testing/selftests/kvm/lib/powerpc/hcall.c > create mode 100644 tools/testing/selftests/kvm/lib/powerpc/processor.c > create mode 100644 tools/testing/selftests/kvm/lib/powerpc/ucall.c > > -- > 2.39.5 > Hi Ritesh, Thanks for working on this enablement. I have tested kvm selftests after applying this patch on top of Sean's patch as mentioned and even I applied this patch for the kvm_create_max_vcpus issue as rc=-56 "https://lore.kernel.org/linuxppc-dev/cover.1789099725.git.ritesh.list@gmail.com/" But still few tests got failed. Providing a summary below: System details where I tested this : PowerVM P11 (ppc64le) KVM enabled lpar! Test Results: ============= PASS: demand_paging_test PASS: dirty_log_test (dirty-log mode, 4K + 64K pages, 32 iterations) PASS: guest_print_test PASS: kvm_binary_stats_test (4/4 subtests) PASS: kvm_page_table_test (4K + 64K pages) PASS: set_memory_region_test PASS: memslot_modification_stress_test (4K + 64K pages) PASS: memslot_perf_test PASS: dirty_log_perf_test (4K + 64K pages) SKIP: irqfd_test   - kvm_arch_has_default_irqchip() not yet implemented for PowerPC SKIP: vm_types_test   - KVM_CAP_VM_TYPES not supported on PowerPC Failures seen for the following tests FAIL: kvm_create_max_vcpus   - RFC patch-3 partially helps: KVM_CAP_MAX_VCPU_ID correctly     capped from 16384 to 2048.   - But vCPU creation still fails with rc=-44 below the 2048 limit.   - dmesg: KVM: Create Guest vcpu hcall failed, rc=-44 for the above test in dmesg I saw the following error everytime I ran this test dmesg -w [ 2640.213798] KVM: Create Guest vcpu hcall failed, rc=-44 [ 2923.048989] KVM: Create Guest hcall failed, rc=-44 [ 3650.642771] KVM: Create Guest vcpu hcall failed, rc=-44 FAIL: hardware_disable_test   - KVM_CREATE_VM fails with ENOMEM   - dmesg: KVM: Create Guest vcpu hcall failed, rc=-44   - Likely the same underlying hcall issue as kvm_create_max_vcpus. FAIL: access_tracking_perf_test   - Too many idle pages (245385 out of 262144)   - errno=4 (Interrupted system call)   - page_idle tracking may not be fully supported on PowerPC yet. I believe these issues might be real kernel issue. If you plan to send fixed please feel free to add my Reported-by: Reported-by: Anushree Mathur Thank you, Anushree Mathur