From patchwork Thu Oct 3 23:43:32 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 13821678 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 B6CEE1D221B for ; Thu, 3 Oct 2024 23:43:52 +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=1727999034; cv=none; b=P6DjTsVrQ7O/IL7q9yBzghllay+FOP1ORf6ZAIxSKhaffyUTZigBPMwe4HgT6MJvrv1Lb2vJa5vJERdlNccNbCSHdjOH+EZMEqCzFtLpA1wD1g76/UDtXp1dUt+lB2njlj/z0rEXEBfhNfq0CtcLYhKn32z2sdaqXvJT0I+vSuE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727999034; c=relaxed/simple; bh=YWaZS/REFKJMLevlqrMIo/CR/NX3I+PwQJV5TvOBW+s=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=HZIF0R8fWgfTotEkyYFaCdRAjTdUbJRLQGTx/DFozs02knrufIDLdOew9kjfPJGn+wSPKQUUaaVJIzR1AgR7YpyAY8XSFs/yfQ4fRqQxtLsNGLN+utovhFilvBD/5lUOHoN6x7hwlJmXggrskij5OQUNLGfr9ysb02Cr2yc0zlg= 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=tQMSKbCT; 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="tQMSKbCT" Received: by mail-pg1-f201.google.com with SMTP id 41be03b00d2f7-7d4f9974c64so1055198a12.1 for ; Thu, 03 Oct 2024 16:43:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1727999032; x=1728603832; 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=xgBcuvGk3o3ZhJ5eerG862wxsCgl+dqWJVsjJCQrLX8=; b=tQMSKbCTN833z8PFmSr0bP6Be9Ipa2H0X8P+Nfmi+zYAJM6Iduuok3T9oHynd6H/Tw iGu2Mq+3sUWbtl5XYOOa6ybifHd/wOi/tCmvbCjjBbtwQ7bQHuwBcYPM6L/01IolCExF CatAu7x/VpsrRu1Gj0a0nDrO3FsFuAIfTl0KO8L+h04vdcEK4MgMPD3dvSTejB/9KwhA qB4yTZSOtnHpk49Slm6OkZWSWCYnFRManXCh7rMf9Zw3y5+PJASirc+MDNIw6lBHy1h6 rOE1gsaoeeRyPWhFhpSQ280QsTRfq3KwGHNsc6GA2t50ZQZNXYoES8JaAbKwDvd5UP/S VwrQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1727999032; x=1728603832; 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=xgBcuvGk3o3ZhJ5eerG862wxsCgl+dqWJVsjJCQrLX8=; b=K3m1dkOvNBqjGDN/I9BqmM/Doo/G0YslgCoXrWYZvrCevCdHd3D+ObtDwz2bXm6e4x 3z6sEaSFv9loBuFxJU4zwPsina7lg/wfLAK0VsGcJKFERxUxKBZUfFX2fND+CWtLfPWw fblaYfeQ2XLgVLaylZx12RHOfVi/qc/vPe0vcIc+qfeAjdG05Ga3qNBinQuO49zww74K hMT8qT5jSYpwQxUIRpQinn7qJYL1tgzYT/NLboRUxXrj+N8whJojwbkPnSx1zh0KYTfa asl6t6cnGulX7HSrl8xKVpfgYS/jzd1PfoKzkeEP0Tu0r7mjHB4xEQvidZLM5MUjMHc6 piaQ== X-Gm-Message-State: AOJu0YzT9cwnzOe4dSh68BMthquK+y0AsSoTjlIl+CWwACY9hZyb7JfV rENq/72O1krNdncJY+2sA37wmzSw4FghsK8PWX+nIWZSrmfLglc5wodb8QX5YFLFzV0tXP3A4Sw 7Kw== X-Google-Smtp-Source: AGHT+IFXq9RCb6WRkwMAtMcPJ9IUSeE+59BJekmESI3c/ddtcupPuWgRFNALH1TsU96CuFHtqHa2A7atpFQ= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a63:8c07:0:b0:7db:16b4:7a2a with SMTP id 41be03b00d2f7-7e9e59a8976mr1289a12.2.1727999031876; Thu, 03 Oct 2024 16:43:51 -0700 (PDT) Reply-To: Sean Christopherson Date: Thu, 3 Oct 2024 16:43:32 -0700 In-Reply-To: <20241003234337.273364-1-seanjc@google.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241003234337.273364-1-seanjc@google.com> X-Mailer: git-send-email 2.47.0.rc0.187.ge670bccf7e-goog Message-ID: <20241003234337.273364-7-seanjc@google.com> Subject: [PATCH 06/11] KVM: selftests: Verify XCR0 can be "downgraded" and "upgraded" From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Vitaly Kuznetsov Now that KVM selftests enable all supported XCR0 features by default, add a testcase to the XCR0 vs. CPUID test to verify that the guest can disable everything except the legacy FPU in XCR0, and then re-enable the full feature set, which is kinda sorta what the test did before XCR0 was setup by default. Signed-off-by: Sean Christopherson Reviewed-by: Vitaly Kuznetsov --- tools/testing/selftests/kvm/x86_64/xcr0_cpuid_test.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/tools/testing/selftests/kvm/x86_64/xcr0_cpuid_test.c b/tools/testing/selftests/kvm/x86_64/xcr0_cpuid_test.c index a4aecdc77da5..c8a5c5e51661 100644 --- a/tools/testing/selftests/kvm/x86_64/xcr0_cpuid_test.c +++ b/tools/testing/selftests/kvm/x86_64/xcr0_cpuid_test.c @@ -79,6 +79,11 @@ static void guest_code(void) ASSERT_ALL_OR_NONE_XFEATURE(supported_xcr0, XFEATURE_MASK_XTILE); + vector = xsetbv_safe(0, XFEATURE_MASK_FP); + __GUEST_ASSERT(!vector, + "Expected success on XSETBV(FP), got vector '0x%x'", + vector); + vector = xsetbv_safe(0, supported_xcr0); __GUEST_ASSERT(!vector, "Expected success on XSETBV(0x%lx), got vector '0x%x'",