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[37.24.206.209]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-5bd1a601dfdsm3591917a12.83.2024.08.14.00.44.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 14 Aug 2024 00:44:12 -0700 (PDT) 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: ffbac252-5a10-11ef-a505-bb4a2ccca743 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=google; t=1723621452; x=1724226252; darn=lists.xenproject.org; h=content-transfer-encoding:autocrypt:content-language:cc:to:subject :from:user-agent:mime-version:date:message-id:from:to:cc:subject :date:message-id:reply-to; bh=R1wvKf6AjB5NsuELrr485XrHZsWeVGAqsKXNC7ny5v4=; b=QWUd8+dHOVIe5al/xaSGhlXw8dROZmnam20fVttttt03j+FzQW5mrpN3URvz9Aa3C1 F1BZTu+Qob1krQVU43TPQD3F6W0ViCmd0LujMcfX4PLlUOogB4uxMLVAar2S+T4b7Kgy jpzJ4fsmdoj0rI+eAcrLPxD1yd9D7DDsKaSt4WHGe0YGqUkLuRWnh5+TulxqRyHgaR+b KAEY0evaPy7DNDSaN/+qWkF58lWP78IZVx3DO+R9nAzFCKi8nXfwKC1UbIghSnp9TF7b 2gpZn4oK7H52QFFq87oVG2Xi4seIPz5vzLDk5Zg8tNL7n8eHqX0BOTiNzKGUalGor8rZ m0ag== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1723621452; x=1724226252; h=content-transfer-encoding:autocrypt:content-language:cc:to:subject :from:user-agent:mime-version:date:message-id:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=R1wvKf6AjB5NsuELrr485XrHZsWeVGAqsKXNC7ny5v4=; b=La+AGjfoBQajH+xKMr4Y/yICCgRwm8kLIhgupkz1ZZENO1k57ehx2TpwNEhkBGRuQL VJ/CfnGmOrNd/sL5pbBbN3ecnunWp8XBVtt3/INucYN9e9Qk0Jlhqdvad2CMtqpaaAV8 OlYWn+TNWZkjXEps0K+RxPCUvU2nHuomPfMf+JtPnb1lOrgHHmbp8oE6+rb5Hg7Rl56D SRS3D2MldjSI52QtEBIEtFSgx1LqHnnSTYkeuay3pvZz+R8ysCU/emRO8ggr+BVr/1H6 cp3put3sizn3KIoN0NiLR4iVKiCfy95xoc8JjMlKImIN9kBVuJ4lM7pVYroFeMiqE3eB z0OQ== X-Gm-Message-State: AOJu0YxQQliiBC7LHdZ7Az/prgKVgyZUY+vWgL9ZuStmpXyuby1S3/Gs lYBxxnqjd0lhzV1e9WBhmz2GMrMzfYa/vN54s3rWdUN5aSxkA40rSjg3otBjC/XPBL085QivOOk = X-Google-Smtp-Source: AGHT+IHVwzLkxbtm5iznwSA+MDN9soiS9AlQ6W14u0vx3DDvGfftbXuZ8bad3/aZaYHbWX5Rr9AxPw== X-Received: by 2002:a05:6402:1d55:b0:585:5697:b882 with SMTP id 4fb4d7f45d1cf-5bd4616ac6amr4977691a12.3.1723621452242; Wed, 14 Aug 2024 00:44:12 -0700 (PDT) Message-ID: Date: Wed, 14 Aug 2024 09:44:11 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird From: Jan Beulich Subject: [PATCH v3] SUPPORT.md: split XSM from Flask To: "xen-devel@lists.xenproject.org" Cc: Andrew Cooper , Julien Grall , Stefano Stabellini , Daniel Smith 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 XSM is a generic framework, which in particular is also used by SILO. With this it can't really be experimental: Arm mandates SILO for having a security supported configuration. Signed-off-by: Jan Beulich Reviewed-by: Roger Pau Monné Reviewed-by: Daniel P. Smith --- v3: Add explanations. Another terminology adjustment. v2: Terminology adjustments. Stronger description. --- a/SUPPORT.md +++ b/SUPPORT.md @@ -769,13 +769,21 @@ Compile time disabled for ARM by default Status, x86: Supported, not security supported -### XSM & FLASK +### XSM (Xen Security Module) Framework + +XSM is a security policy framework. The dummy implementation is covered by this +statement, and implements a policy whereby dom0 is all powerful. See below for +alternative modules (FLASK, SILO). + + Status: Supported + +### FLASK XSM Module Status: Experimental Compile time disabled by default. -Also note that using XSM +Also note that using FLASK to delegate various domain control hypercalls to particular other domains, rather than only permitting use by dom0, is also specifically excluded from security support for many hypercalls. @@ -788,6 +796,13 @@ Please see XSA-77 for more details. The default policy includes FLASK labels and roles for a "typical" Xen-based system with dom0, driver domains, stub domains, domUs, and so on. +### SILO XSM Module + +SILO implements a policy whereby DomU-s can only communicate with Dom0, yet not +with each other. + + Status: Supported + ## Virtual Hardware, Hypervisor ### x86/Nested PV