From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f202.google.com (mail-pl1-f202.google.com [209.85.214.202]) (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 C0DF321255A for ; Sat, 13 Jun 2026 00:20:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781310046; cv=none; b=oNMOeXRA7Af8OvMais585uwp3/t8qPt07mocHXDw5SIMBUsRt4dGf9CiQnRpi10M17uL/wMJdsalrEQeIVXjbQ6+H9m7qrUpPSob/NfVaNhjYR/RI8q+q/D7A8aSXiJxAtOdwQMDi7Wb5/fgrB+8bs7G7zN+SWLLkk8rRddTtCs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781310046; c=relaxed/simple; bh=z2y3Udpn3PcQ5P8PyZ7p3m88PIL7r3+VZEmGyqxvHS4=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=cqLoInwyqXpCsrDe2MEcskU919TMZjX2nJfqUFWHzP18CTAwKYqvSs7qxo9VsodwlkjGFqjwRzKV9ohAjVu82Ztd8f2mgZ2kT/fj3BXyMX6OtJdE1wtLF5fejvARNiCy9/3n9g8xvd9fRM62HdnfMbJJZpPX3njf6178Hqw5Nug= 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=uYzFUWXw; arc=none smtp.client-ip=209.85.214.202 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="uYzFUWXw" Received: by mail-pl1-f202.google.com with SMTP id d9443c01a7336-2c354050c34so13966135ad.3 for ; Fri, 12 Jun 2026 17:20:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1781310042; x=1781914842; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=RpDrln9aFOeZE+9RVMRnWEbd+STgPtUuso+t2WcSRjI=; b=uYzFUWXwgshCEsvmzaEGxL0rpO1tdxRacX5P6IQ9a5ixutJ5PypQow/6yInor7Y1CV F4aLEDoHKtstDOatTE5n/XNVam1W1ZNVLn7hmSqiS0Ln5DpgOWLAiQ5GDb9Cejx0y9ai 4nGumHEW2QtuPYGnJ4C1vnt3A+UpZkXN7izloAEv2fLAArHSDQdFeZS42Vz+u++7cBLS RJXU/NFzntOINk06W6F6GckVUO6ULuV/WlY6dtVpFfH15frZoybzGHJGL8w7THHxxHvW fPM87vMGbstcMDx7mGJB3KHKnke3gTSDKklAQlazLuOLYntydUu7zZGwXdsAlcOMfUGq A1sQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781310042; x=1781914842; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=RpDrln9aFOeZE+9RVMRnWEbd+STgPtUuso+t2WcSRjI=; b=dfLcN/6DDx+j79VOhs5s8yHpD4ZdbcsS9mee1EgQ6e7q38mpJlFFSb5shch2oZvyI/ 83tr0s5vLVPPpNDv6mPs0C1QMihfw9uzuF7Bx1xlrqr2FSe1vJYGwKDq2p+b8YAcF7Gw MoQhbsBkmjsal7aGTeke+lvs6B5RMwo/YmUJWl/xNfT/QxPEBnMBVVz2sGo6b6BtKMt8 RXLU4ve5p9OLrmyWlvljzVG7355MsMqGZYQ86MyErnPcelfNOBEfczVE3qiTSWGTcPEi m/YNpejDLQ7FzQgq+4yk2XJBEW5lqDeWXa7b1UKkS8oZNa1x71cI++w4qyslRKrV1SY4 55jA== X-Forwarded-Encrypted: i=1; AFNElJ/rl4WHjHg1V3hwKOOPRw+eNCUX5P6opg5UjV8xclDSgb9vhrXmBZEgoRkuB0+88qpU3uIMmORwvAizsV0=@vger.kernel.org X-Gm-Message-State: AOJu0YzmqJ8y9IcRYniYzQ1PQ4NWAYp0carq1jZQkeYoHeqe1naA8w// fuhvNtsW0ySk0NSixZJuCg1mDA0gfUmOEyXk5y+/0ZX8/2WMW18B8kg4OB6lSESZ81Fn/RvVh1W vJGF/bw== X-Received: from plbkx8.prod.google.com ([2002:a17:902:f948:b0:2bd:106:8ad0]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:902:e881:b0:2c0:b932:866e with SMTP id d9443c01a7336-2c6642915famr18540805ad.27.1781310041864; Fri, 12 Jun 2026 17:20:41 -0700 (PDT) Reply-To: Sean Christopherson Date: Fri, 12 Jun 2026 17:20:17 -0700 In-Reply-To: <20260613002031.745413-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260613002031.745413-1-seanjc@google.com> X-Mailer: git-send-email 2.54.0.1136.gdb2ca164c4-goog Message-ID: <20260613002031.745413-7-seanjc@google.com> Subject: [PATCH v7 06/20] KVM: selftests: Add helper to generate random u64 in range [min,max] 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" From: Josh Hilke Introduce kvm_random_u64_in_range(state, min, max). This function returns a random u64 in the inclusive range of [min, max] using a struct kvm_random_state. Suggested-by: Sean Christopherson Signed-off-by: Josh Hilke Signed-off-by: Sean Christopherson --- .../testing/selftests/kvm/include/test_util.h | 3 +++ tools/testing/selftests/kvm/lib/test_util.c | 18 ++++++++++++++++++ 2 files changed, 21 insertions(+) diff --git a/tools/testing/selftests/kvm/include/test_util.h b/tools/testing/selftests/kvm/include/test_util.h index 44c0104d60ac..d64c8a228207 100644 --- a/tools/testing/selftests/kvm/include/test_util.h +++ b/tools/testing/selftests/kvm/include/test_util.h @@ -134,6 +134,9 @@ static inline u64 kvm_random_u64(struct kvm_random_state *state) return ((u64)kvm_random_u32(state) << 32) | kvm_random_u32(state); } +u64 kvm_random_u64_in_range(struct kvm_random_state *state, u64 min, + u64 max); + enum vm_mem_backing_src_type { VM_MEM_SRC_ANONYMOUS, VM_MEM_SRC_ANONYMOUS_THP, diff --git a/tools/testing/selftests/kvm/lib/test_util.c b/tools/testing/selftests/kvm/lib/test_util.c index e98ca7ef439c..e208a57f190c 100644 --- a/tools/testing/selftests/kvm/lib/test_util.c +++ b/tools/testing/selftests/kvm/lib/test_util.c @@ -42,6 +42,24 @@ u32 kvm_random_u32(struct kvm_random_state *state) return state->seed; } +/* Returns a random u64 in the inclusive range [min, max] */ +u64 kvm_random_u64_in_range(struct kvm_random_state *state, u64 min, + u64 max) +{ + u64 value; + u64 range; + + TEST_ASSERT(min <= max, "PEBKAC, min = 0x%lx, max = 0x%lx", min, max); + + value = kvm_random_u64(state); + + range = max - min; + if (range == ULLONG_MAX) + return value; + + return min + (value % (range + 1)); +} + /* * Parses "[0-9]+[kmgt]?". */ -- 2.54.0.1136.gdb2ca164c4-goog