From nobody Sat May 30 15:33:40 2026 Received: from mail-pj1-f74.google.com (mail-pj1-f74.google.com [209.85.216.74]) (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 D6A0C34A3BF for ; Wed, 6 May 2026 21:35:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.74 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778103318; cv=none; b=eClAA1XsLr4OwupTKJcRWWmaDu/ckgvMAgDNcle4lArybgM9lVBOoenm086UJD5A4yPStbakgN6nNByI3cr8MYakVZdP98JCcuY9DATOjb71dVvKXp4oOaUMB2NAr+2bh0kCP8B/LjfPUu19qmxbbCCwBsrYO36LeNbt2IEkxWs= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778103318; c=relaxed/simple; bh=mRYi9mrv9cJ/0m5kJMz2jJ6Ide70vERZrEr/M6NkFzc=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=bYojI/+4LyCZRL4aft2biCtrxPTvWv4kurjHDiwHzIpy1CKmNYOY6YLVttGeucWYD+ecHZp1nAnIx0txtsaIvGs+EWhKtbwMWetMUKgRJzjiZhZsD21KiMoqCuuHd7SxMf57J20repd5r0QH+wQ+xm8WG2vRkhHwVA7y84dKgD0= 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=OpwzZKqG; arc=none smtp.client-ip=209.85.216.74 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="OpwzZKqG" Received: by mail-pj1-f74.google.com with SMTP id 98e67ed59e1d1-365161a9de4so154007a91.1 for ; Wed, 06 May 2026 14:35:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1778103316; x=1778708116; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:reply-to:from:to:cc :subject:date:message-id:reply-to; bh=EepvVW/fxw9kc/G6WG51HwpIETRUCz4dkY8OYOWR/38=; b=OpwzZKqGIWmBVKnbhtilQ7vZegrjN2dB0zYiSG2K2k3pihiDX5Yl+kHtHpK0/jnsXm K8yRQofnsXtdIgFlb/5QUY+xxBTJkX5rImOxEQVQpc0Seclyd832Bq/+lRxNG3qbujvr 3Kltf1ta1jLa+eBLpN9FxyEO2eoRgG98AhwePA0/mt4/MNKqAziveIhZ2Y9DKyp1qLsZ C5CvxeMy3dSDM01FEeZCTaxffCmjC0ZYQRvGY5p6EQl2Hh7jJPzeLk7NDVlgvKfBYDE5 ueqUsxY7DWoeVepI3Xvs7WbN7zN+onhL4OvlgAtPcLmT3MtclHZg5r42pHDWw3k5NAl7 2yxQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1778103316; x=1778708116; h=cc:to:from:subject:message-id:mime-version:date:reply-to :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=EepvVW/fxw9kc/G6WG51HwpIETRUCz4dkY8OYOWR/38=; b=QN0PHQLevIE+Q05BPp9tp57H2mr8JmlHsC+owoOezYeG7BXFRtdULPzcvvGyfRxLlb /uTUO/g/kIeHpuhyGh2prKUcCZSJBpAqR22+OSktPRaLVOEm4PWxpsVkIJK3Yg5WZGhX 8bCcgQCfZiiX1c+bJb0ejBUDM3IfN9WNSHuGZudQ0AQ81BIwm0nvPllrVBUIuHbeJ8IP tNHu2TO9hl+/qGYnKYurvrkaNspTUEDxSekSUBH689FdsWqNb/qe/w2xgX1jJ8/wi2V7 Li8SKS5vekcDHm/kDc9Xx2toSn+aSJxDDeed4AHHdH3dZpNbX5CEchQAv4VuupAnsp3z jbCw== X-Forwarded-Encrypted: i=1; AFNElJ/pmXrFbnZGUJHfu7XgBjrl3cnk/XTPLI9a3n7lXgAQv3q7R9PYNvyjtbvkcTAx5iVYrJh5M3MEi+SsRUs=@vger.kernel.org X-Gm-Message-State: AOJu0YyoUmVPV2lZDircp/KH2Dhr2xA4NnnkRndXOcF6Kb1vDLA1p+6W fw9PbyDCf6L9/kRBVnK8Sn92fqDskdd4jFu4K+SR9RVhcymQ7nax72RiQ3yN3dqQkMX/jixb3TS E2PcFeg== X-Received: from pgch29.prod.google.com ([2002:a05:6a02:509d:b0:c80:ca29:73c6]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:4b12:b0:365:b93a:1ebf with SMTP id 98e67ed59e1d1-365b93a2061mr4136615a91.4.1778103316110; Wed, 06 May 2026 14:35:16 -0700 (PDT) Reply-To: Sean Christopherson Date: Wed, 6 May 2026 14:35:14 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.54.0.545.g6539524ca2-goog Message-ID: <20260506213514.2781948-1-seanjc@google.com> Subject: [PATCH v2] KVM: x86: Swap the dst and src operand for MOVNTDQA From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Josh Eads Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Swap the MOVNTDQA operands, as MOVNTDQA does NOT in fact have "the same characteristics as 0F E7 (MOVNTDQ)"; MOVNTDQA loads from memory and stores to registers, while MOVNTDQ loads from registers and stores to memory. Per the SDM: MOVNTDQ - Move packed integer values in xmm1 to m128 using non-temporal hint. MOVNTDQA - Move double quadword from m128 to xmm1 using non-temporal hint if WC memory type. Reported-by: Josh Eads Fixes: c57d9bafbd0b ("KVM: x86: Add support for emulating MOVNTDQA") Cc: stable@vger.kernel.org Signed-off-by: Sean Christopherson Reviewed-by: Jim Mattson --- v2: Suck less. [Josh] v1: https://lore.kernel.org/all/20260506185510.2723091-1-seanjc@google.com arch/x86/kvm/emulate.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index c8c6cc0406d6..8013dccb3110 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -4481,7 +4481,7 @@ static const struct opcode opcode_map_0f_38[256] =3D { X16(N), X16(N), /* 0x20 - 0x2f */ X8(N), - X2(N), GP(SrcReg | DstMem | ModRM | Mov | Aligned, &pfx_0f_e7_0f_38_2a), = N, N, N, N, N, + X2(N), GP(SrcMem | DstReg | ModRM | Mov | Aligned, &pfx_0f_e7_0f_38_2a), = N, N, N, N, N, /* 0x30 - 0x7f */ X16(N), X16(N), X16(N), X16(N), X16(N), /* 0x80 - 0xef */ base-commit: 6d35786de28116ecf78797a62b84e6bf3c45aa5a --=20 2.54.0.545.g6539524ca2-goog