From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f201.google.com (mail-pg1-f201.google.com [209.85.215.201]) (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 A800A231C91 for ; Wed, 10 Jun 2026 00:53:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781052829; cv=none; b=AEYx5dpF67a+Qh4EvSg01NSwEpYuyAjJumRHlQjJAd1HP8tU4QBSI8gVSsP7M+ZiL4uX8yrNoDMqZH10PFpeSuTT3QHn0/hCFt9l0C2XbeG1nYikSl9mgAEQKYyVvu64lBE4oe3C7b4ATZJ2W946Drw0z05PxGqzX1u94fXol2c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1781052829; c=relaxed/simple; bh=vIl+HWefkeqsv1qtuVtCcBVofBdfj9obESA6FgCgLp4=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=sSCaCQt/dQBhxiSr4H8f2zc9366gLqqr0EzT/VCfRRICsN2iH6qBdUFv/l25cnzWO2Lud9UL/TrNO8jCc+rQWKHLhbfIi7At2BNrojEw7UR9yLiQrTlzaFqqFYROa09yoEDnWpAMUoeM8HoBEzoWRE+Iki7nFehqDBihdyQx04g= 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=L+Sk0aaP; arc=none smtp.client-ip=209.85.215.201 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="L+Sk0aaP" Received: by mail-pg1-f201.google.com with SMTP id 41be03b00d2f7-c85a2cda4d0so3143747a12.3 for ; Tue, 09 Jun 2026 17:53:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1781052827; x=1781657627; 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=8NGdw5RJ6bJAu+NqY9JKZh9Q+XXOC2uDO6XCtjvqorw=; b=L+Sk0aaPcgzNwZK6SXQ0EuPHiAGYHDVreLjDsb41JIuqi60SCm4ejLy8Q/1ZGBZ8PY 32JkRSxwyTFfPAyoB9rgRPMZbixfbORgddOZ4go5GQfXCJPD193r8V6Zk7UQY2CgkVrR gfF0Gn7GKctU6iaKSQpUtHYzxyJ8UoYpsDRnnIPwPg7TlHyzqxCzAEwzuWTrORACqSMZ PM/XO50ey6TxGhGQqO6rqQC0IZKu0WKBgZbs4CiR78xi7Yu0mY52v28B8k+OjZ6QUAny vFwmu6Kk7B06YOzgxwaLVER/v97Cpc2wsDSEaDvTJb0TXnH/m+RCnG6HmYqQpat9PHkF 4KSQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1781052827; x=1781657627; 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=8NGdw5RJ6bJAu+NqY9JKZh9Q+XXOC2uDO6XCtjvqorw=; b=Z5nqGzXVd2PsZjkQf3LL0ObLIWvQ3pOMGre6vdftI5N6ot0ni9sMcoTwUIxVSvPZTx SdrIFWKbf7ncOXDPqNkhepwnQpRK7zxi7sQnxEqJ5HO7nk1YxHvDWqHtSscohwOM0xlu 2Lm29pwLY/+fTZSHNzNQrc6NJKj4Cp0gjWZQndymwhHyxD459V7ptF6bp3fwesAOeUn4 naXsPBM/bjNyN4nQiSNWAjNBavqQ4ce0NyYJaIPnAALPv6AduoTmPUbl2damZArlroji sw/yecOcSmcxKtgl73vpZWp389dGKqufDZCy0W6k6KeYymyIXja09OU+btraRSlTWD/z VtvQ== X-Forwarded-Encrypted: i=1; AFNElJ989r/y09zvGTHcvoJa7h0xmItRpaHWM09fOcYI9eUVaNgG3pbZ4SbOss27S7K8crRLB/CpK89+kaZtn18=@vger.kernel.org X-Gm-Message-State: AOJu0YxoMrDxs5LeuhTkSV50rtfh5KFMmQG+AI/WEtsBSrN6Y6eevE/5 HJzlP2abYNkczLZVz1AKHbpk+5hE/6qVyYGg4/32GkJWaqSSUZib89FAHZjLZEsDq0Qsb74PInn dm+kWHQ== X-Received: from pfbhk10.prod.google.com ([2002:a05:6a00:878a:b0:842:723a:7919]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:2351:b0:842:569d:b105 with SMTP id d2e1a72fcca58-842b0f8bd8bmr25284333b3a.34.1781052826595; Tue, 09 Jun 2026 17:53:46 -0700 (PDT) Reply-To: Sean Christopherson Date: Tue, 9 Jun 2026 17:53:24 -0700 In-Reply-To: <20260610005338.2967132-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260610005338.2967132-1-seanjc@google.com> X-Mailer: git-send-email 2.54.0.1099.g489fc7bff1-goog Message-ID: <20260610005338.2967132-5-seanjc@google.com> Subject: [PATCH v6 04/18] 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]?". */ -- 2.54.0.1099.g489fc7bff1-goog