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Re: [PATCH v6 00/18] xen: introduce CONFIG_SYSCTL
- To: Penny Zheng <Penny.Zheng@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Fri, 4 Jul 2025 11:48:31 +0200
- Autocrypt: addr=jbeulich@xxxxxxxx; 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
- Cc: ray.huang@xxxxxxx, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Julien Grall <julien@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>, Dario Faggioli <dfaggioli@xxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, George Dunlap <gwd@xxxxxxxxxxxxxx>, Nathan Studer <nathan.studer@xxxxxxxxxxxxxxx>, Stewart Hildebrand <stewart@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Alistair Francis <alistair.francis@xxxxxxx>, Bob Eshleman <bobbyeshleman@xxxxxxxxx>, Connor Davis <connojdavis@xxxxxxxxx>, Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxx
- Delivery-date: Fri, 04 Jul 2025 09:49:07 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 04.07.2025 11:29, Penny Zheng wrote:
> It can be beneficial for some dom0less systems to further reduce Xen footprint
> via disabling some hypercalls handling code, which may not to be used &
> required in such systems. Each hypercall has a separate option to keep
> configuration flexible.
>
> Options to disable hypercalls:
> - sysctl
> - domctl
> - hvm
> - physdev
> - platform
>
> This patch serie is only focusing on introducing CONFIG_SYSCTL. Different
> options will be covered in different patch serie.
>
> Features, like LIVEPATCH, Overlay DTB, which fully rely on sysctl op, will
> be wrapped with CONFIG_SYSCTL, to reduce Xen footprint as much as possible.
>
> It is derived from Stefano Stabellini's commit "xen: introduce kconfig
> options to
> disable hypercalls"(
> https://lore.kernel.org/xen-devel/20241219092917.3006174-1-Sergiy_Kibrik@xxxxxxxx)
>
> ---
> Commit "xen/x86: remove "depends on !PV_SHIM_EXCLUSIVE"" and commit "
> xen/sysctl: wrap around sysctl hypercall" shall be commited together.
> ---
> Penny Zheng (16):
> xen/xsm: wrap around xsm_sysctl with CONFIG_SYSCTL
> xen/sysctl: wrap around XEN_SYSCTL_readconsole
> xen/sysctl: make CONFIG_TRACEBUFFER depend on CONFIG_SYSCTL
> xen/sysctl: wrap around XEN_SYSCTL_sched_id
> xen/sysctl: wrap around XEN_SYSCTL_perfc_op
> xen/sysctl: wrap around XEN_SYSCTL_lockprof_op
> xen/pmstat: introduce CONFIG_PM_OP
> xen/sysctl: introduce CONFIG_PM_STATS
> xen/sysctl: wrap around XEN_SYSCTL_page_offline_op
> xen/sysctl: wrap around XEN_SYSCTL_cpupool_op
> xen/sysctl: wrap around XEN_SYSCTL_scheduler_op
> xen/sysctl: wrap around XEN_SYSCTL_physinfo
> xen/sysctl: make CONFIG_COVERAGE depend on CONFIG_SYSCTL
> xen/sysctl: make CONFIG_LIVEPATCH depend on CONFIG_SYSCTL
> xen/sysctl: wrap around arch-specific arch_do_sysctl
> xen/x86: remove "depends on !PV_SHIM_EXCLUSIVE"
>
> Stefano Stabellini (2):
> xen: introduce CONFIG_SYSCTL
> xen/sysctl: wrap around sysctl hypercall
This doesn't look to be based on latest staging, where some of the changes above
are already present. I specifically tried to get some of the stuff in so that
the next re-posting wouldn't be as large.
Jan
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