From nobody Mon Feb 9 09:09:52 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 3B1641E1302 for ; Thu, 21 Nov 2024 18:53:43 +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=1732215224; cv=none; b=u6f1G55coHzA9+Nh6BivvEea+rJY/YqrsVWjM19JHYNlmtTfM1ClWD6M2isPsGnQrFuLIg8vi3Ba28+d5KpwuLLGMMuKI0goGH2W6B1bI4oboXMDNVW+9O0Ju3mY1+EQXM28WwrnrUgIqmWMiSvm3CA+5V8lMl0MHmoEaKbtzyo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732215224; c=relaxed/simple; bh=dpvmC6fUg1oYhPj0KX7fGNscwICe9zRsrr6N3ofRupc=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=ky3phyy8oYJ9Vosk4yLUvy4fpxouS78OGkd8DrToYd7j+Ah3GHgRyIwK0dLI8IOE7VEskMEi5pfTQViJnvV1VzQ40OEf6H51qLcEfPAJhRzyidKmu0RuyvGFd/+tKMI46UwLrEPsGRaEqcPieOnNxPido5FhMahxCAlPGhosVX4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--mizhang.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=U81UXU5U; 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--mizhang.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="U81UXU5U" Received: by mail-yw1-f201.google.com with SMTP id 00721157ae682-6eec33c5c50so20607837b3.1 for ; Thu, 21 Nov 2024 10:53:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1732215222; x=1732820022; 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=PTZwTdWNiJi5zJc4U346f9dQ01Nf48/ag1/NR2uEtTY=; b=U81UXU5U93yVsVK8sO+tVnlyAYBKwLw0nHgeFyomsvzKhRJWKqXPsJhwJDXZZRM0ir ZlcQiXYSEBqYwAqrMRgCvghTfTafXu8zLr99pOzjhzaCpdP2pVzRLzTh0qXuHXK7G+lg +7sIiIR/rS69XQ78TQQpjzztRwR6dWLlKO6mDFs2z5wPtGR1m+WMsneLu3tUeUCdJTKv U2AmY5IAeASvhaPYNpz3r+Sj7c0e8EE/54Gg+VGqxAWloBYoCmtFMG48zJM8w/iY9fWq arDxZEUTs1KNiI9J5ixPO+Y2UTbj8R9ZwIxzUBxZ02eHRC56cMqdYSn/7du4+VSPFvBd R2FQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1732215222; x=1732820022; 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=PTZwTdWNiJi5zJc4U346f9dQ01Nf48/ag1/NR2uEtTY=; b=GREMUd9x8qNbbAmiCjdlSq8HO9bNSWIVHG5qRVUwQW0ANfFs7gsPBQzdIUeXtNt0kx DChr2AyVuqZuKsBlkYLnKuICC2VMffQEmR1yjC4TCTUKuYnQsCyZxFWiyavhUTViZZp+ eynR00BiymAlnbt5ZLOKaf+8Y0TCL+g4Ui27SDxhyiJz1EH1wGiGXwPe4xpYMczaJMrw mh9ycyoCAbPT558qhttAZEfCOH9aElSvrKUEuYKDBMYPa/sE5vMLHiYn/Ip/99d7ycv4 kBLf/sz4O7GQVlHxfwBtOXi6y+JZjkKGK/RCfYUPQPrB9qM326HbWlcvGjpc9LPDHFm+ jxmA== X-Forwarded-Encrypted: i=1; AJvYcCUavZSa1lXesFIzEyGF7nphgU2LQ84kd7xBMH79oe/PX2ZNbCJYok+zWeFbvPRQzxdyrntkqKTTIQaid/w=@vger.kernel.org X-Gm-Message-State: AOJu0YxEH0bmpK/uk4i5iBBhI/uasWHxN57MBgNxeWGNanCMBTcp2RoS YTu1HbSm5gWEFSlk+bI9B6rBrngIIFQUUn/WLdu3GvMjAHb8Z0l8A80mA4QQ0K9HZpA64L9EO+9 U6elIbw== X-Google-Smtp-Source: AGHT+IHARvlONItudnx3LP0qpCsMs2eWD55KOxdOXi+6vEQansb9DlnkhO2mSfcmALCI/jGewWhmjCqnweLA X-Received: from mizhang-super.c.googlers.com ([35.247.89.60]) (user=mizhang job=sendgmr) by 2002:a0d:dc04:0:b0:6ee:8453:f427 with SMTP id 00721157ae682-6eee0a5e9dbmr1207b3.7.1732215222397; Thu, 21 Nov 2024 10:53:42 -0800 (PST) Reply-To: Mingwei Zhang Date: Thu, 21 Nov 2024 18:53:06 +0000 In-Reply-To: <20241121185315.3416855-1-mizhang@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241121185315.3416855-1-mizhang@google.com> X-Mailer: git-send-email 2.47.0.371.ga323438b13-goog Message-ID: <20241121185315.3416855-15-mizhang@google.com> Subject: [RFC PATCH 14/22] KVM: x86: Introduce kvm_user_return_notifier_register() From: Mingwei Zhang To: Sean Christopherson , Paolo Bonzini , Huang Rui , "Gautham R. Shenoy" , Mario Limonciello , "Rafael J. Wysocki" , Viresh Kumar , Srinivas Pandruvada , Len Brown Cc: "H. Peter Anvin" , Perry Yuan , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Jim Mattson , Mingwei Zhang Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Jim Mattson Factor out user return notifier registration logic from kvm_set_user_return_msr() into a separate helper function to prepare for the registration of KVM's user return notifier from kvm_load_guest_aperfmperf(). No functional change intended. Signed-off-by: Jim Mattson --- arch/x86/kvm/x86.c | 15 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index acfa9ecc5bc36..6df8f21b83eb1 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -637,6 +637,15 @@ static void kvm_user_return_msr_cpu_online(void) } } =20 +static void kvm_user_return_notifier_register(struct kvm_user_return_msrs = *msrs) +{ + if (!msrs->registered) { + msrs->urn.on_user_return =3D kvm_on_user_return; + user_return_notifier_register(&msrs->urn); + msrs->registered =3D true; + } +} + int kvm_set_user_return_msr(unsigned slot, u64 value, u64 mask) { struct kvm_user_return_msrs *msrs =3D this_cpu_ptr(user_return_msrs); @@ -650,11 +659,7 @@ int kvm_set_user_return_msr(unsigned slot, u64 value, = u64 mask) return 1; =20 msrs->values[slot].curr =3D value; - if (!msrs->registered) { - msrs->urn.on_user_return =3D kvm_on_user_return; - user_return_notifier_register(&msrs->urn); - msrs->registered =3D true; - } + kvm_user_return_notifier_register(msrs); return 0; } EXPORT_SYMBOL_GPL(kvm_set_user_return_msr); --=20 2.47.0.371.ga323438b13-goog