From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yw1-f202.google.com (mail-yw1-f202.google.com [209.85.128.202]) (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 CCF5C13D889 for ; Thu, 1 Aug 2024 18:40:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722537603; cv=none; b=UkDvTAVkn1+E9U0bE+9wOTEpbSAOvcEewr3sTkqtbD3uRC2q1B+DnPsyYslEV11TmgzO3DIgXalvfwVvXF8pQGVUFpEvbYWs0Shq2MJIMV8atw8LzuqRvYF5Hp8JE8K4DH0GqcxQ7qMzJGjroQIAqyHK8DvBQvujCbBrrzJMHxk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722537603; c=relaxed/simple; bh=v3ngMtvWawUbNngrsCnmsU9HoWKp4/snJm8LhI4ZsL0=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=j3Plzg/5oyKZSYviCRVB54cK+w9I0RCQR60jfF2BbGPw86LyJWyjo41UA/DWoeJ02gr6XS4mSJpzRULweVgQhaosZXF834CSfmONlTbqwenI6DztKnkYdvoQnJI/ema/IyAgNm3VQVB2X3vLGSe7nlzCoy3fnz/7j4SXX/QnSuw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--yosryahmed.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=KbV9Ee+M; arc=none smtp.client-ip=209.85.128.202 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--yosryahmed.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="KbV9Ee+M" Received: by mail-yw1-f202.google.com with SMTP id 00721157ae682-666010fb35cso40386007b3.0 for ; Thu, 01 Aug 2024 11:40:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1722537601; x=1723142401; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:from:to:cc:subject :date:message-id:reply-to; bh=T6yPRhC8+VoSP5QSl7WqotG6f6x/q7DmyfyOAFIfGXQ=; b=KbV9Ee+MtjGJK1M4YAjAMLV3ULX7QteAlLM+xkVtQ+G87phsLuSszTOxbVLq1SZrN7 ZhOsRgsCVXgzb8+G+EW11lHLfn8xKdESGbnDBTK4N4YlI+cFx2vg2BntPcHssnVfnTCG fMel8f7pcPTnxZq1xthPjlpI9OdEEiKrOXWC8MOzn8Ns/pp3Diz/CZLbJmu5BfUgiAfh DS3rhJ1z8rA0Z67GeIxEhCNG0KYrXPV/GSExTH+D9dgRz25Fb67PNhXRymZXz3rjEAJK MHO3Wqz3wYYcqMNhRe0VVv9ZCkfANUdEo2WxSAqKkGdPdjHS+KUlIgwQ6t8GObJsSVb/ q4mw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1722537601; x=1723142401; h=cc:to:from:subject:message-id:mime-version:date:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=T6yPRhC8+VoSP5QSl7WqotG6f6x/q7DmyfyOAFIfGXQ=; b=PW1LFQPxw+OyO9f6xGB52RU5br8NTKoV7tySHJMHdhIwwFpJej9lQLPa3h233RK9lv QFFfN+sZVtqfuy+eqsRXvsmAOM6sM8RPW4G9W6qUWRcnH+yCuqzPhn3yItztlqeV3V2o rUDNQqv+yIfoezi9E4pe+b29ihkd8B4WkGFGOKfXfG2rJ5g9uLENA0SOyog0g0ak5tKm hKzzNJ+cHVcb2zL/JPBGh2Ew3tZLOSqQJ26Ne5NtLKCNqY15CYd/pxUV3NpwPOZ9+sJ0 aoTtUR0zfmV09ntqxQUmUqhOpJjZ9189sIPiFjLE8YLbyug/Jhk7pV2LYMTeQRKMK1yl W2IA== X-Forwarded-Encrypted: i=1; AJvYcCU2armxUeudeSwTfhiwU98BpIi1ijlB2Jhu3QDtw5xXHtZV7thIOHkS2ZwP9HcMWA23QrRPzGfUp+clWFRO9i//DkS/YH7Pz16GNYq0 X-Gm-Message-State: AOJu0YwcYbfRskUMIFNATfr56ihsk0ydNrQc7phXRcvDqMD1Ei3FIsXU 7zoYp/IBbB0oTk89MDj+g4ldn5ysebIzywKLN76Rdoggh34ix4vq+kl/RH22LGcNp5DkO/ri3We mOMqzJfqmws1NM2uDaA== X-Google-Smtp-Source: AGHT+IHYOqsisgtCA4aJn8iiJrhlOqWcWkXhmH+zVo7bk8yf1CWdZe9U3mUn5G8dyhc0nxA756eyNP+k6DuS+1MQ X-Received: from yosry.c.googlers.com ([fda3:e722:ac3:cc00:20:ed76:c0a8:29b4]) (user=yosryahmed job=sendgmr) by 2002:a05:690c:dc7:b0:64b:2608:a6b9 with SMTP id 00721157ae682-689643921c3mr457477b3.3.1722537600846; Thu, 01 Aug 2024 11:40:00 -0700 (PDT) Date: Thu, 1 Aug 2024 18:39:58 +0000 Precedence: bulk X-Mailing-List: linux-hyperv@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.46.0.rc2.264.g509ed76dc8-goog Message-ID: <20240801183958.2030252-1-yosryahmed@google.com> Subject: [PATCH] x86/hyperv: use helpers to read control registers in hv_snp_boot_ap() From: Yosry Ahmed To: "K. Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui Cc: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, Yosry Ahmed Content-Type: text/plain; charset="UTF-8" Use native_read_cr*() helpers to read control registers into vmsa->cr* instead of open-coded assembly. No functional change intended, unless there was a purpose to specifying rax. Signed-off-by: Yosry Ahmed --- arch/x86/hyperv/ivm.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/arch/x86/hyperv/ivm.c b/arch/x86/hyperv/ivm.c index b4a851d27c7cb..434507dd135c5 100644 --- a/arch/x86/hyperv/ivm.c +++ b/arch/x86/hyperv/ivm.c @@ -321,9 +321,9 @@ int hv_snp_boot_ap(u32 cpu, unsigned long start_ip) vmsa->efer = native_read_msr(MSR_EFER); - asm volatile("movq %%cr4, %%rax;" : "=a" (vmsa->cr4)); - asm volatile("movq %%cr3, %%rax;" : "=a" (vmsa->cr3)); - asm volatile("movq %%cr0, %%rax;" : "=a" (vmsa->cr0)); + vmsa->cr4 = native_read_cr4(); + vmsa->cr3 = __native_read_cr3(); + vmsa->cr3 = native_read_cr0(); vmsa->xcr0 = 1; vmsa->g_pat = HV_AP_INIT_GPAT_DEFAULT; -- 2.46.0.rc2.264.g509ed76dc8-goog