From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f201.google.com (mail-pl1-f201.google.com [209.85.214.201]) (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 8C6A01A6812 for ; Sat, 30 May 2026 00:23:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780100593; cv=none; b=O901RXp+drszkwJj7A8xrYLFQTZuOaz1xH0P5b/oNSK+4c1nLLWUQNwiYwDBX0v7UPqv/sROwlINX/IRZnvZT1/PzRHCgr4Plzz3L3jHb29kcZSdIvD8L4RQ4Qp9OLmiy7yFezMPmZXHF2tVu09AV2Siir7V7M8/Wl8F6xkV+rE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780100593; c=relaxed/simple; bh=Wj+UbOSDYhhcXkbNuCEqtUYkT3jEsOdg5YGtZ2onw50=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=gkfcEYNyP3tS9FevptcfZeBwbAMLbOhOzzCa5LMLAbpf3fSZqW/JcmoHSTgTF8YcwyWxqYLjrq0jWDPkdXaGAFERjHFuoOgz/QhxFLyyCDH5uZ82l8SBUFHmsB3UOe6+2bVnp5a5kbh40Qk8AOS+ZoEweN/95WIXEcuWvvpRGOY= 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=PccNeIXZ; arc=none smtp.client-ip=209.85.214.201 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="PccNeIXZ" Received: by mail-pl1-f201.google.com with SMTP id d9443c01a7336-2bd6aeb3637so320420555ad.2 for ; Fri, 29 May 2026 17:23:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1780100590; x=1780705390; 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=6z2U56XL51gXNFdr4umtF89ubW0Siw/kvIEmINYMcys=; b=PccNeIXZDFHidJ2Y4Wg9eTshol0QBGPJAsUUPGi7ICdSZhalhK0HbcQ0B5ApeJYpo/ SwvJywKaSA5urdaTNGEMPc5A59ILsXQEZZIrPP1WJRFII0UqZKRCbO/6O3nFKVWC1Yhv QieQTLR22qSZJkLHj9/jfEYUfCdiTwPnqY1o5KdKVdFBIPCgPckQAN3LTZT7Kvh+CrXR 5I6e4hUd0z9UkvwlFoP8XjjZGzm9jn4S5NzPWmPvTm6UNcNSAtLjXfXs1ZvpT3rAfQCp CIXkgQLV4Y4Dwzrjr3jtbFbeGXdXUnjemot5930wAlwcB+v37uP6KCq4mb9LgtBGi+Bh /jSA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780100590; x=1780705390; 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=6z2U56XL51gXNFdr4umtF89ubW0Siw/kvIEmINYMcys=; b=NVm4b1EEs3f6jhTAFY0LUnuIOLC8+G//FP+ikoeBc5LBq6eCCF7rsbVf8kXjsR9bnW F4Qm2IyoEfSKAaRaTMpwVlAUDyZsq/m7VhkGkTCYlckwviGSxfh57oZ4pb+njwFo087Y 7hfjpVJ3XMgXRdd5rpVSXWaoA1e3IMJArlDWaDJOv+/cXNoBJ0M+RACOnkKl1WW2XOii YQtJ1GK/4GzAItBcT/jIHi6ukTzr+ss+VcqHniFikASKCXrdQWmd5rYxctZ2a7QfCSqq SLV+wDak1FEg2HTNQE9ZvW8I0o2D8IhSbjMDyPYlQnofeoFcjM1dGH+p+ClGa1imP35C d2nQ== X-Forwarded-Encrypted: i=1; AFNElJ+7V/ZWnBV3hIuhp/AkZQkbGQb+eCN9dVUxJSpGXlmfRKN4bVwJQxQt1tUiXpXmA+7XjlfPQmprWGh+a5c=@vger.kernel.org X-Gm-Message-State: AOJu0Ywceu0ehBIa1zJM1FO1KzWhc4HeyMxsieunkBDP4SiSrAg6IT46 5htGqfabqLGp5KiF8/2vgTMsRNONh9Csw0YOdKV2/CJe5nVpm/vV7yzLvypSiC2nRnLw/vn0cj/ IaMr2kClc X-Received: from plaq12.prod.google.com ([2002:a17:903:204c:b0:2b0:aef9:a5a2]) (user=jrhilke job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:17c8:b0:2bd:8dbb:293e with SMTP id d9443c01a7336-2bf367c80b3mr24794555ad.14.1780100589696; Fri, 29 May 2026 17:23:09 -0700 (PDT) Date: Sat, 30 May 2026 00:21:20 +0000 In-Reply-To: <20260530002134.558837-1-jrhilke@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260530002134.558837-1-jrhilke@google.com> X-Mailer: git-send-email 2.54.0.929.g9b7fa37559-goog Message-ID: <20260530002134.558837-6-jrhilke@google.com> Subject: [PATCH v4 05/19] 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 ae39c4293b9a..d601227dbdba 100644 --- a/tools/testing/selftests/kvm/include/test_util.h +++ b/tools/testing/selftests/kvm/include/test_util.h @@ -132,6 +132,9 @@ static inline uint64_t kvm_random_u64(struct kvm_random_state *state) return ((uint64_t)kvm_random_u32(state) << 32) | kvm_random_u32(state); } +uint64_t kvm_random_u64_in_range(struct kvm_random_state *state, uint64_t min, + uint64_t 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 e342d9fb4771..dc47ed9736e9 100644 --- a/tools/testing/selftests/kvm/lib/test_util.c +++ b/tools/testing/selftests/kvm/lib/test_util.c @@ -42,6 +42,24 @@ uint32_t kvm_random_u32(struct kvm_random_state *state) return state->seed; } +/* Returns a random u64 in the inclusive range [min, max] */ +uint64_t kvm_random_u64_in_range(struct kvm_random_state *state, uint64_t min, + uint64_t max) +{ + uint64_t value; + uint64_t 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]?". */ -- 2.54.0.929.g9b7fa37559-goog