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Tue, 24 Mar 2026 08:54:51 -0700 (PDT) Message-ID: <3cde1263-d5fd-4bb0-a0ce-c5bf5d735a20@suse.com> Date: Tue, 24 Mar 2026 16:54:49 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Content-Language: en-US To: "xen-devel@lists.xenproject.org" Cc: Nathan Studer , Stewart Hildebrand From: Jan Beulich Subject: [PATCH] arinc653: clear entire .dom_handle[] for Dom0 slots 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 Content-Transfer-Encoding: quoted-printable X-purgate-ID: tlsNG-720697/1774367692-68176DB8-C9498C1C/0/0 X-purgate-type: clean X-purgate-size: 1235 X-ZohoMail-DKIM: pass (identity @suse.com) X-ZM-MESSAGEID: 1774367719670158500 Content-Type: text/plain; charset="utf-8" When that code still lived in a653sched_init(), it was redundant with the earlier memset() / xzalloc(). Once moved, the full structure field needs setting, as dom_handle_cmp() uses memcmp(). Fixes: 9f0c658baedc ("arinc: add cpu-pool support to scheduler") Signed-off-by: Jan Beulich --- There being no "else" to the if(), what about other Dom0 vCPU-s? And why is it that domain ID 0 is special here, rather than the hardware and/or control domain(s)? (Likely the latter as that's what would invoke XEN_SYSCTL_SCHEDOP_putinfo, and hence needs to be able to run without that having been issued first.) --- a/xen/common/sched/arinc653.c +++ b/xen/common/sched/arinc653.c @@ -420,7 +420,8 @@ a653sched_alloc_udata(const struct sched =20 if ( entry < ARINC653_MAX_DOMAINS_PER_SCHEDULE ) { - sched_priv->schedule[entry].dom_handle[0] =3D '\0'; + memset(sched_priv->schedule[entry].dom_handle, '\0', + sizeof(sched_priv->schedule[entry].dom_handle)); sched_priv->schedule[entry].unit_id =3D unit->unit_id; sched_priv->schedule[entry].runtime =3D DEFAULT_TIMESLICE; sched_priv->schedule[entry].unit =3D unit;