From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f201.google.com (mail-pf1-f201.google.com [209.85.210.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AFFB11A9FB7 for ; Sat, 13 Jun 2026 00:20:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781310037; cv=none; b=ApHDd5s8PnLrztFs+eLImN0sRD/bybn/IkbPwONdn/Qrl5tBOjwD+XPogp6RjAi0jYAzBOUTkcVorQManboRhatwld2XCq36N/TzJWwPkE0Lqbcn9nFRGGlMJcGxzIetstvVsytM9TPO6naxE8U3ojNi0owr4WG+wJLsK65JvCo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781310037; c=relaxed/simple; bh=fp00CPla8I1Pd4aUs418T7CXfCDqWFVQHxfoDTGI80w=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=PWKAER9GO/z7gJSPIip+BP1qmz05OqAmDTu5xIQ8OnMLwG3HIhO1B0OS2JVubdgHBXJgdHohYhajsTjAnc0bHCXYHvvLko0I21Bkt2YFgYLq2n5aHzh6nRZ25hYgt5fTjyx3PYi4EnLWEuMTBmznBiZC103skYLNPpezq6WPieM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=XyXhjd9i; arc=none smtp.client-ip=209.85.210.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="XyXhjd9i" Received: by mail-pf1-f201.google.com with SMTP id d2e1a72fcca58-842308adb3bso2035068b3a.0 for ; Fri, 12 Jun 2026 17:20:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1781310034; x=1781914834; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:reply-to:from:to:cc :subject:date:message-id:reply-to; bh=WmyzcKWN5sYZUTeYCc9CQUvIpkkw/cT2wO4LeW7OYQY=; b=XyXhjd9iYlJRk3rCCFKz8QNDGnzlUN61XcAMsOvFsKuhmN71vknkBGaJL6XcYzBlmg 8U8YSNRmLFhK+C1+AQITPoHE2igGp2vrlIXoU/hZ1rzC5HdPC2O1qDhyiNuD5N8ANQ49 53APisk8mrG0n+SmQKiwcS53nTE9dvYG8RyR6G1Eg/TYKVG22cIbRx5fzfL5ZsiHyxO5 rGxCffoWFh9GhIbCNZUYhc8uEWPcUXwOOPkIbQvvxKBuYGNDBP7sRVT0+b6BnyztFuOv 4jIri+qtvAojA74Rp2dCY0W5aJrJi/YGHykXF+P4Wj7C4z8Xf5L8Cd9S5ZvmYRVVF44k A/kA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781310034; x=1781914834; h=cc:to:from:subject:message-id:mime-version:date:reply-to :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=WmyzcKWN5sYZUTeYCc9CQUvIpkkw/cT2wO4LeW7OYQY=; b=V/Ttlt1CK+6dWwbkJ7L5a52zu3PqDtZ9qgkHWoa/rngQIP/91kRjziNVgKMFMkSg7D b4QShQKYrcE7qz/OjF0BIG8cWFxdEMyUxDUJc6lOC3dzhffurbOswuGQUutIqF9bQH3v bylD7o8hZBMNO9PcKWElB1Y6il/JLDRUKhdEdj3XGK/c+zhwwC6aeS1ugba27ADqjqwN 9lbpwwMi6wswofPblPm1jLONLHY04TcoZuC6gkdVDW34UE+36DHcfyRg65W0I9jUEv7A PLD+tFTXWCxcYWgOMNWqrloB8E1VPQAquvCdBl9e/xyiDgXuMsIDl4OFfmPdFCD3An4o +29g== X-Forwarded-Encrypted: i=1; AFNElJ/g7hfk2XKsu/PlbM72f9Ho/+ycaG75EkL9lSMdIjpGFNiGYnwKLbsCYKP+Nld9YeXhAtA8Njyl5VQiHSM=@vger.kernel.org X-Gm-Message-State: AOJu0YzcRE4bbLGlVlHKBaDOp9FWlvnTtoNOvMKHqpHrDzNGJiPaKbv0 /xJjf+oDgDB5XBrOMFADD6F9LX1j/R47+r+JmqFPv3glZLEowJCSRf5Ct4eRB4SOhXWZRs3aDc7 OspcHog== X-Received: from pfbk14.prod.google.com ([2002:a05:6a00:b00e:b0:82f:8cba:4285]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:9503:b0:842:3a3b:d6e7 with SMTP id d2e1a72fcca58-844e1a2c4e5mr2039973b3a.23.1781310033733; Fri, 12 Jun 2026 17:20:33 -0700 (PDT) Reply-To: Sean Christopherson Date: Fri, 12 Jun 2026 17:20:11 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.54.0.1136.gdb2ca164c4-goog Message-ID: <20260613002031.745413-1-seanjc@google.com> Subject: [PATCH v7 00/20] KVM: selftests: Add eventfd+VFIO IRQ test From: Sean Christopherson To: Paolo Bonzini , Marc Zyngier , Oliver Upton , Sean Christopherson Cc: Joey Gouly , Steffen Eiden , Suzuki K Poulose , Zenghui Yu , kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, David Matlack , Josh Hilke Content-Type: text/plain; charset="UTF-8" David and Josh's series to add a selftest for verifying interrupt delivery via eventfd (via KVM_IRQFD), and also from a real device, wired up via VFIO. I originally wanted to get this into 7.2, but that's not going to happen. But I hope to get this applied early in the 7.3 cycle so that additional features and whatnot can be developed on top without too much pain (hopefully). Gory details in the patches, and in the v5 cover letter. v7: - Seed kvm_rng during kvm_selftest_init(). [Sashiko] - Seed libc's RNG during kvm_selftest_init(), so that the seed (from random()) that's printed and passed to kvm_rng isn't the same every time. - Init irq_cpu to -1 in all paths. [Sashiko] v6: - Massage most changelogs. - Fix SoB ordering issues. - Clean up KVM_SET_GSI_ROUTING helper. - Remove misleading "IRQ injection" and "emulated eventfd" terminology. - Add GUEST_RECEIVED_INTERRUPT() to simplifiy the core loop. - Use cpu_relax() in tight loops while waiting for interrupts. - Print as much information as possible in the actual assert, instead of printing to stdout separately. - Make a best guess as to the right VFIO vs. IOMMUFD mode instead of assuming IOMMUFD, and give the user the option to overide said guess. - Simplify open_proc_irq_smp_affinity_list() + write_proc_irq_smp_affinity_list() into proc_irq_set_smp_affinity(). - Drop print_proc_irq_file() and kvm_print_vcpu_affinity() (for now) to avoid potential issues on systems with high CPU counts. - Drop the blocking/HLT testing as it was at best broken. - Use -e for "empty", not -c for "clear", when completely tearing down GSI routing, because routing can be "cleared" without completely emptying the routing information. - Use the main task's CPU affinity as the available_cpus set. - Allow overcommiting vCPUs:pCPUs. - Set the target vCPU's affinity instead of batching when vCPU0 is targeted. - Add support for 256+ vCPUs with x2APIC. - Restrict xAPIC mode to 255 vCPUs. - Restrict the test to KVM selftest's max supported vCPUs. v5: - https://lore.kernel.org/all/20260604020143.748245-1-jrhilke@google.com - Rename get_proc_vfio_irq_number() to vfio_msix_to_host_irq() - Rename open_proc_irq_affinity() and write_proc_irq_affinity() to include "_smp_affinity_list" - Print /proc/irq//smp_affinity and effective_affinity on timeout failures - Convert IRQ type from 'int' to 'unsigned int' across helpers and the test - Fix compiler warnings for uninitialized variables in irq_test.c - Remove rate-limiting on affinity changes v4: https://lore.kernel.org/kvm/20260530002134.558837-1-jrhilke@google.com David Matlack (11): KVM: selftests: Build and link selftests/vfio/lib into KVM selftests KVM: selftests: Add macros to read/write+sync to/from guest memory KVM: selftests: Add an irqfd send+receive (and later IRQ bypass) test KVM: selftests: Add helper to get host IRQ from device MSI-X for IRQ bypass test KVM: selftests: Add VFIO device support to eventfd IRQ test KVM: selftests: Verify interrupts are received when IRQ affinity changes in IRQ test KVM: selftests: Add option to set empty routing between IRQs in eventfd IRQ test KVM: selftests: Make number of IRQs configurable in IRQ test KVM: selftests: Verify vCPU migration during IRQ delivery in IRQ test KVM: selftests: Make number of vCPUs configurable in IRQ test KVM: selftests: Add xAPIC support in eventfd IRQ test Josh Hilke (6): KVM: selftests: Rename guest_rng to kvm_rng KVM: selftests: Add helper to generate random u64 in range [min,max] KVM: selftests: Add a helper to set proc IRQ affinity for IRQ test KVM: selftests: Add kvm_gettid() wrapper and convert users KVM: selftests: Add kvm_sched_getaffinity() wrapper and convert users KVM: selftests: Add a utility to pin a task to a random CPU, given a CPU set Sean Christopherson (3): KVM: selftests: Initialize the default/global pRNG during kvm_selftest_init() KVM: selftests: Seed libc's RNG before using it to generate a seed for KVM's pRNG KVM: selftests: Verify non-postable IRQ remapping in IRQ test tools/testing/selftests/kvm/Makefile.kvm | 7 +- tools/testing/selftests/kvm/arch_timer.c | 2 +- .../kvm/arm64/arch_timer_edge_cases.c | 2 +- .../selftests/kvm/demand_paging_test.c | 2 +- .../selftests/kvm/dirty_log_perf_test.c | 4 +- tools/testing/selftests/kvm/dirty_log_test.c | 11 +- .../selftests/kvm/include/kvm_syscalls.h | 7 + .../testing/selftests/kvm/include/kvm_util.h | 12 + .../testing/selftests/kvm/include/proc_util.h | 11 + .../testing/selftests/kvm/include/test_util.h | 25 +- .../selftests/kvm/include/x86/kvm_util_arch.h | 4 +- tools/testing/selftests/kvm/irq_test.c | 350 ++++++++++++++++++ tools/testing/selftests/kvm/lib/assert.c | 8 +- tools/testing/selftests/kvm/lib/kvm_util.c | 53 ++- tools/testing/selftests/kvm/lib/memstress.c | 8 +- tools/testing/selftests/kvm/lib/proc_util.c | 54 +++ tools/testing/selftests/kvm/lib/test_util.c | 27 +- tools/testing/selftests/kvm/mmu_stress_test.c | 15 +- tools/testing/selftests/kvm/rseq_test.c | 6 +- tools/testing/selftests/kvm/steal_time.c | 22 +- .../testing/selftests/kvm/x86/sev_dbg_test.c | 2 +- 21 files changed, 548 insertions(+), 84 deletions(-) create mode 100644 tools/testing/selftests/kvm/include/proc_util.h create mode 100644 tools/testing/selftests/kvm/irq_test.c create mode 100644 tools/testing/selftests/kvm/lib/proc_util.c base-commit: c1f7303302927f9cbf4efedf70f0512cde168c65 -- 2.54.0.1136.gdb2ca164c4-goog