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 33B5D2DF15C for ; Thu, 4 Jun 2026 02:02:35 +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=1780538557; cv=none; b=tNQc2vCDYcnZHAXpBnb9bGQNhlQsJvaeHARLxPwWoppNTAjHTtVlTfZ0J60sue7wiHhukMKT+FA1xd4SxkThLe2KskLCUElGiIY/HXRzSjs9xWfT9QSiLgOo5ODaMcwwB3bdApSSEX1avJBQBfrQFOne231mXK2D7PmjvqkevVw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780538557; c=relaxed/simple; bh=nXMNFoJGxvgH700sR0v5qvFlNpxFTIuzOHnSgpSJ0jE=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=FcV2RV3EVQtSEU34UjdREV8op/PTfHX73vMx+Tq4FYm/8BgT0TIkhagI7fZsm7qFv9NXyxLxcX9lnlo2MMhSYrpPb2G9/h+4QGeivlBk31sc0TsCRBWNKhi786kAKxBP0Iqk8M6XpbLzkDsnpCulq6emB0iRaVLQZ67PjZ3G+SA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--jrhilke.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=FGWT1MM0; 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--jrhilke.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="FGWT1MM0" Received: by mail-pg1-f201.google.com with SMTP id 41be03b00d2f7-c85a2f1d1e5so113179a12.3 for ; Wed, 03 Jun 2026 19:02:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1780538554; x=1781143354; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=NhsS4g2OlkS1/KJbrnXrgNUTVZ9kOb2Vmfr1lJZkXHU=; b=FGWT1MM0FW7qfgv/GgnAdPWtSMOKvgYQ7C7B2qsxBbA7RL94GyGWBLrLHFX8DUMPkD HKFZOP/67hK0HfSrn43LwYqjP9l4pbe2UW0Di+JWOsWVVOFKFk32dACbxEkswJ9YuFu+ 6TKjeuPpX6kWQsT9tpNDeMj2R5iaitxninlgCeQTgRsbBeh1lDQ8a5K2omDiTNSDrjLG qF7+vu7o0lllHSAG15adXuKpFAxjPYEbL+VwFJB9OORWKF/Dy8wEXoTN5Mp1SpAXDoFM 9/Urvy4RuYkqcSMzG1fHoxuxsYKgB9iY98wjGFmIL5puwV1wPVCuh/Lxsrk/2e2qo8k0 CsHw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780538554; x=1781143354; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=NhsS4g2OlkS1/KJbrnXrgNUTVZ9kOb2Vmfr1lJZkXHU=; b=i1zDgsg88/Jpa8ncJNHpxUGQN33V6RlM5OLGTnDq41ym0OyCwBVK9a+GO2Hpb/KRgH Cc6fNbGunzwa48H8dTWkiwZl/FcsOqr+MLMIUoclO57WQveWKzkgfAJ6era1FSYCARwA Mx7d05qFVEtZEiN0kke2U2+2R/vnYDuk3QxXo+0HUIXHUmhA6F1DICFss7aiPcVP8yUR kjcrBywEiJ6DxYx35yo1dwjsWj29MkthhiCO5k3LnLwQuPnp0R3+72f8GhOuaURvTXPv TWbZPRJL/HKXfihd+TOzJGxO9c3/bZbIi3h0+LRAgEY4MtDABryNZmUmZattWga0m1mn IfqQ== X-Forwarded-Encrypted: i=1; AFNElJ+LCn/H+DGVpw5oTFBq8BC5FbCpWg3lyQtmS1OlHIB/8U8Cvlid4jrsvbIfLtW2xnFvjhHaxir5kWevDLo=@vger.kernel.org X-Gm-Message-State: AOJu0YwHNGuNXerR32+6Q6ldXEAxL+uBVbpuB8B24fX0xHxudjouZEcU wiHx5bgwbEZ5m8Ie5ku7k4uzkiWee7oKaSy6rQ8MBmbzpl2cFKCrgjTWiAp2z/F3dfJtT6oWr/3 NEGU3sEOD X-Received: from pgc24.prod.google.com ([2002:a05:6a02:2f98:b0:c80:192c:51ff]) (user=jrhilke job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6300:228c:b0:3b3:62be:3584 with SMTP id adf61e73a8af0-3b4977ff27emr6352035637.11.1780538554256; Wed, 03 Jun 2026 19:02:34 -0700 (PDT) Date: Thu, 4 Jun 2026 02:01:26 +0000 In-Reply-To: <20260604020143.748245-1-jrhilke@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260604020143.748245-1-jrhilke@google.com> X-Mailer: git-send-email 2.54.0.1032.g2f8565e1d1-goog Message-ID: <20260604020143.748245-5-jrhilke@google.com> Subject: [PATCH v5 04/21] KVM: selftests: Add helper to generate random u64 in range [min,max] From: Josh Hilke To: Paolo Bonzini , Sean Christopherson Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, David Matlack , Alex Williamson , Josh Hilke Content-Type: text/plain; charset="UTF-8" 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 --- .../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]?". */ -- 2.54.0.1032.g2f8565e1d1-goog