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[37.24.206.209]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-a8989221c24sm797846466b.196.2024.09.04.05.29.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 04 Sep 2024 05:29:58 -0700 (PDT) X-Outflank-Mailman: Message body and most headers restored to incoming version X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 6641d5f7-6ab9-11ef-a0b3-8be0dac302b0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=google; t=1725452998; x=1726057798; darn=lists.xenproject.org; h=content-transfer-encoding:in-reply-to:autocrypt:content-language :references:cc:to:from:subject:user-agent:mime-version:date :message-id:from:to:cc:subject:date:message-id:reply-to; bh=ttbJN3WJ9nsR4tpRYJrAfRfyH0Rlt3wlme3cRFYht04=; b=NK95J4AoUA3aAsfpy5LB8FIWATu6XLmFLR44ZNSF/xe5hrM8y+CuISW+HX7srxXsWh 42ENdMqr6jTnA0GVbJr93cOS4/FALMsH2oTbkd6Ya3s+LIbPKCbg0h3+318J25cqE9YQ 4hno+V8hOqOmIi5vJZ7tEib33oJIvbaamFZateCFMcwbWjZJUogHWzoGpkjEVbdyH3XU 0HSF+W4Pxy3bSXHdtWwNu5gSVadmDv+XEPLmY3fzPhNcWWFiA5tKV7iexPB5pWIRJ4KB rXuO1AVn2eoZcDuAYr1k4vk+/znrDvZW+bHQyA4+T4O6FEYUhYd2TEaXI2YHLETzFZWj eK+w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1725452998; x=1726057798; h=content-transfer-encoding:in-reply-to:autocrypt:content-language :references:cc:to:from:subject:user-agent:mime-version:date :message-id:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=ttbJN3WJ9nsR4tpRYJrAfRfyH0Rlt3wlme3cRFYht04=; b=GAnmMELeaXbxfAa/2deSvwe/zAwD4Ii5ub7gvOItfqrSXoLpbzQVR+mb5G+H6gXvww UIOh5VkWgxqUQWFB0YpA/C1S99qyKTPLKZjhC5cijOijQ2RC1WIy9UhO2aTp1sTrWWO+ 5kv+z8TmOMdJz4JCH+VKrt4pkLFrU8PxgE3tJewKO05S62JQwQOadzYZYeTtELuuDTPs IhfBpf2Ol2fBlUS/xTJ0JUC2SuRNuxUYF1ILiJHXx2Wc7a5/9uOWH8Naq7A+yLlByjoB GWw+CRJplG/a9wlhdHtaOQD3gI16ujRy7MqDaVq8L/iArpz8Ob5pLy5HAmqWAweqbjTS Nm4A== X-Gm-Message-State: AOJu0Yze5qLBoj4WhVZ+MnP+NcXqyttfc8gcAnh5e4VYJQp/sdJwiXJE PqYHhuyjKMfXz/fH3mMd2ZPHiuouqa/Z4nMtWzgYxiqyGUTkZBn/pzwHDgH9WF2xtYMVkfA/4XE = X-Google-Smtp-Source: AGHT+IFJ1RjwFIhgyUyOdpUdygySa14eSmtXXpRRCuObVR07sw0W4KlGapFWWnfhih1mnKRLsxSV9Q== X-Received: by 2002:a17:906:ef09:b0:a77:ab9e:9202 with SMTP id a640c23a62f3a-a8a42f8af0amr190545666b.4.1725452998458; Wed, 04 Sep 2024 05:29:58 -0700 (PDT) Message-ID: <45913a43-114e-4885-809a-0d682264fb41@suse.com> Date: Wed, 4 Sep 2024 14:29:57 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: [PATCH v5 6/7] x86/cpu-policy: re-arrange no-VMX logic From: Jan Beulich To: "xen-devel@lists.xenproject.org" Cc: Andrew Cooper , Wei Liu , =?UTF-8?Q?Roger_Pau_Monn=C3=A9?= References: <0b9a0ae8-a39c-49d8-b4e7-f2a463128058@suse.com> Content-Language: en-US Autocrypt: addr=jbeulich@suse.com; keydata= xsDiBFk3nEQRBADAEaSw6zC/EJkiwGPXbWtPxl2xCdSoeepS07jW8UgcHNurfHvUzogEq5xk hu507c3BarVjyWCJOylMNR98Yd8VqD9UfmX0Hb8/BrA+Hl6/DB/eqGptrf4BSRwcZQM32aZK 7Pj2XbGWIUrZrd70x1eAP9QE3P79Y2oLrsCgbZJfEwCgvz9JjGmQqQkRiTVzlZVCJYcyGGsD /0tbFCzD2h20ahe8rC1gbb3K3qk+LpBtvjBu1RY9drYk0NymiGbJWZgab6t1jM7sk2vuf0Py O9Hf9XBmK0uE9IgMaiCpc32XV9oASz6UJebwkX+zF2jG5I1BfnO9g7KlotcA/v5ClMjgo6Gl MDY4HxoSRu3i1cqqSDtVlt+AOVBJBACrZcnHAUSuCXBPy0jOlBhxPqRWv6ND4c9PH1xjQ3NP nxJuMBS8rnNg22uyfAgmBKNLpLgAGVRMZGaGoJObGf72s6TeIqKJo/LtggAS9qAUiuKVnygo 3wjfkS9A3DRO+SpU7JqWdsveeIQyeyEJ/8PTowmSQLakF+3fote9ybzd880fSmFuIEJldWxp Y2ggPGpiZXVsaWNoQHN1c2UuY29tPsJgBBMRAgAgBQJZN5xEAhsDBgsJCAcDAgQVAggDBBYC AwECHgECF4AACgkQoDSui/t3IH4J+wCfQ5jHdEjCRHj23O/5ttg9r9OIruwAn3103WUITZee e7Sbg12UgcQ5lv7SzsFNBFk3nEQQCACCuTjCjFOUdi5Nm244F+78kLghRcin/awv+IrTcIWF hUpSs1Y91iQQ7KItirz5uwCPlwejSJDQJLIS+QtJHaXDXeV6NI0Uef1hP20+y8qydDiVkv6l IreXjTb7DvksRgJNvCkWtYnlS3mYvQ9NzS9PhyALWbXnH6sIJd2O9lKS1Mrfq+y0IXCP10eS FFGg+Av3IQeFatkJAyju0PPthyTqxSI4lZYuJVPknzgaeuJv/2NccrPvmeDg6Coe7ZIeQ8Yj t0ARxu2xytAkkLCel1Lz1WLmwLstV30g80nkgZf/wr+/BXJW/oIvRlonUkxv+IbBM3dX2OV8 AmRv1ySWPTP7AAMFB/9PQK/VtlNUJvg8GXj9ootzrteGfVZVVT4XBJkfwBcpC/XcPzldjv+3 HYudvpdNK3lLujXeA5fLOH+Z/G9WBc5pFVSMocI71I8bT8lIAzreg0WvkWg5V2WZsUMlnDL9 mpwIGFhlbM3gfDMs7MPMu8YQRFVdUvtSpaAs8OFfGQ0ia3LGZcjA6Ik2+xcqscEJzNH+qh8V m5jjp28yZgaqTaRbg3M/+MTbMpicpZuqF4rnB0AQD12/3BNWDR6bmh+EkYSMcEIpQmBM51qM EKYTQGybRCjpnKHGOxG0rfFY1085mBDZCH5Kx0cl0HVJuQKC+dV2ZY5AqjcKwAxpE75MLFkr wkkEGBECAAkFAlk3nEQCGwwACgkQoDSui/t3IH7nnwCfcJWUDUFKdCsBH/E5d+0ZnMQi+G0A nAuWpQkjM1ASeQwSHEeAWPgskBQL In-Reply-To: <0b9a0ae8-a39c-49d8-b4e7-f2a463128058@suse.com> Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @suse.com) X-ZM-MESSAGEID: 1725453017146116600 Content-Type: text/plain; charset="utf-8" Move the PKS check into an "else" for the corresponding "if()", such that further adjustments (like for USER_MSR) can easily be put there as well. Signed-off-by: Jan Beulich --- v5: Re-base. v4: New. --- a/xen/arch/x86/cpu-policy.c +++ b/xen/arch/x86/cpu-policy.c @@ -741,19 +741,20 @@ static void __init calculate_hvm_max_pol if ( !cpu_has_vmx_xsaves ) __clear_bit(X86_FEATURE_XSAVES, fs); } + else + { + /* + * Xen doesn't use PKS, so the guest support for it has opted to n= ot use + * the VMCS load/save controls for efficiency reasons. This depen= ds on + * the exact vmentry/exit behaviour, so don't expose PKS in other + * situations until someone has cross-checked the behaviour for sa= fety. + */ + __clear_bit(X86_FEATURE_PKS, fs); + } =20 if ( !cpu_has_vmx_msrlist ) __clear_bit(X86_FEATURE_MSRLIST, fs); =20 - /* - * Xen doesn't use PKS, so the guest support for it has opted to not u= se - * the VMCS load/save controls for efficiency reasons. This depends on - * the exact vmentry/exit behaviour, so don't expose PKS in other - * situations until someone has cross-checked the behaviour for safety. - */ - if ( !cpu_has_vmx ) - __clear_bit(X86_FEATURE_PKS, fs); - /*=20 * Make adjustments to possible (nested) virtualization features expos= ed * to the guest