From nobody Mon Feb 9 23:43:43 2026 Received: from mail-yw1-f201.google.com (mail-yw1-f201.google.com [209.85.128.201]) (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 7C4506AFB6 for ; Thu, 22 Feb 2024 19:06:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708628800; cv=none; b=DrgzQMU2F0kaUwGiSZh/i7s1U2/H0Vuzdvg4swu7CWTUJMkl882FcJHWg9JMTfbvZe/K+u9WDmHpUb7f+WmsFmYJoCBr9BRqLnTVF86dJ6bWRRZIkE5ZI1vDyhevKyvQ+LXV6pKk+oacQXIKfDYz6cJDLMC6ujUBA2PxQXsx7+0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708628800; c=relaxed/simple; bh=cIWRw/ciFRHors/2oYNTTCOVc0HlamGjl6dwJRVdN1E=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=l7IjpGcFUKKYogeSUi/Ha3Vce1bdLuL5IgYA1YUh9QrQKBCdd+HvQ0aZw8nKvl/UddV1uyN3AfFNaWi7zP6PQ4t+e9qpS6m0WAXi24G2uUFVVxwvt5qCGxbbuhInkpCoY8Y3va+skr2C5W9bi7ZaShIvYb+8S2A6+uCxbQFxPtM= 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=ZLljWQbj; arc=none smtp.client-ip=209.85.128.201 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="ZLljWQbj" Received: by mail-yw1-f201.google.com with SMTP id 00721157ae682-5f38d676cecso15390997b3.0 for ; Thu, 22 Feb 2024 11:06:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1708628784; x=1709233584; 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=riJ7HRTQ7IsaxxoiPw34+GvPTL1t25LYSZ+Y64H+IpU=; b=ZLljWQbjVNJupQi4T7YcKqIFlPrh0x02R8ZFdng1L4U7qgPX5tTi/GPKxJ9C0LoR2f 83g0utNm9hSd1Wup7EYKEOEpGJaF3BeVw2h7Hy5988W6GPYsEBG6UVvBhNMQaUsZO/BP luOqsxWQh3v0SAmJRuGPOK2SWqb7Z2LKXu/6/W+ncXDQpZUg7TofywmfOym86q4Yghox HT3lvegL5RwwidfHxf0vDstfrVg5WQosaDsG3k+wiuRip5bHaDEL9qLl+dLpvr2mPWHT 7LwN1s24y+0eezpMWFFzjmNiJF+UtIHR68fDYFPHvZ0axoWkBScqnMbToTeSAwW8FqOv pCCg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1708628784; x=1709233584; 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=riJ7HRTQ7IsaxxoiPw34+GvPTL1t25LYSZ+Y64H+IpU=; b=XovANwIeOfZXf6mCmDiqludy6ALQ8oaZAN0tu56HO99cRHk79mjhnQT6ZQKuqhP3my JIT3AldQfXqoyszXXEKnzriBKSzeiHutKXQJRlvCDbxEI2x+37fGtWTefMIsWVEX9qjn 2JQECqo4x+iyp0+ozV7D2sJPKRZAqMpB+Je5+hzDo9CxlGEP80WrnDX1NiW/+/QzqIu2 qwxiaskxfeVxiFbP0QfPqfM09x7IUEwQePZ2vlFnuKKAG2jukEZ1SZY6rhzqJG8dwMe2 NfCkYGFfuD22zFbo5Iys0Ip8eeGpC/w/0lwY7A8iSVmjICZF/iYV4flYQV6gHUDgX3h/ VQpw== X-Forwarded-Encrypted: i=1; AJvYcCVMpyVqVQcq27+Sg+6QLcAXWLA8i1vddcDUalS/v53ZenGGi76O9UGgYEqaD5mFDBnkY9lgjuK4m1lhoL3fXRZAIWjUOD1AEH0GH0CU X-Gm-Message-State: AOJu0Yw4NaqsVtWE2+mQ7W0PjKAKUviegkn3gvdC+9mjkZuckwYE5+yy ObR1Wl7MGrf61ptfSI3a8IYWsITySaMA92m5FBTN/A4zAIvXAqAyZnRBI57epgkvFKMlTAqYQOX M5A== X-Google-Smtp-Source: AGHT+IHK+000I6aYNhYwLooXEmohmYz3fy083+ikkdIHowbT0ZCvhybvYWO5SGzJhGJoTQp8dbEOocVxQ4A= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a05:690c:2846:b0:607:f42f:70e1 with SMTP id ed6-20020a05690c284600b00607f42f70e1mr737848ywb.4.1708628784418; Thu, 22 Feb 2024 11:06:24 -0800 (PST) Reply-To: Sean Christopherson Date: Thu, 22 Feb 2024 11:06:12 -0800 In-Reply-To: <20240222190612.2942589-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20240222190612.2942589-1-seanjc@google.com> X-Mailer: git-send-email 2.44.0.rc0.258.g7320e95886-goog Message-ID: <20240222190612.2942589-6-seanjc@google.com> Subject: [PATCH 5/5] KVM: selftests: Add a testcase to verify GUEST_MEMFD and READONLY are exclusive From: Sean Christopherson To: Paolo Bonzini , Sean Christopherson Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Fuad Tabba , Michael Roth , Isaku Yamahata , Yu Zhang , Chao Peng Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Extend set_memory_region_test's invalid flags subtest to verify that GUEST_MEMFD is incompatible with READONLY. GUEST_MEMFD doesn't currently support writes from userspace and KVM doesn't support emulated MMIO on private accesses, and so KVM is supposed to reject the GUEST_MEMFD+READONLY in order to avoid configuration that KVM can't support. Signed-off-by: Sean Christopherson --- tools/testing/selftests/kvm/set_memory_region_test.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/testing/selftests/kvm/set_memory_region_test.c b/tools/t= esting/selftests/kvm/set_memory_region_test.c index 9df4b61116bc..06b43ed23580 100644 --- a/tools/testing/selftests/kvm/set_memory_region_test.c +++ b/tools/testing/selftests/kvm/set_memory_region_test.c @@ -375,6 +375,12 @@ static void test_invalid_memory_region_flags(void) TEST_ASSERT(r && errno =3D=3D EINVAL, "KVM_SET_USER_MEMORY_REGION2 should have failed, dirty logging priv= ate memory is unsupported"); =20 + r =3D __vm_set_user_memory_region2(vm, 0, + KVM_MEM_READONLY | KVM_MEM_GUEST_MEMFD, + 0, MEM_REGION_SIZE, NULL, guest_memfd, 0); + TEST_ASSERT(r && errno =3D=3D EINVAL, + "KVM_SET_USER_MEMORY_REGION2 should have failed, read-only GUEST_ME= MFD memslots are unsupported"); + close(guest_memfd); } } --=20 2.44.0.rc0.258.g7320e95886-goog