- 15 Feb, 2024 36 commits
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Thomas Gleixner authored
Now that all platforms have the new split SMP configuration callbacks set up, flip the switch and remove the old callback pointer and mop up the platform code. Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Tested-by:
Michael Kelley <mhklinux@outlook.com> Tested-by:
Sohil Mehta <sohil.mehta@intel.com> Link: https://lore.kernel.org/r/20240212154639.870883080@linutronix.de
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Thomas Gleixner authored
Initialize the new callbacks in preparation for switching the core code. Signed-off-by:
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Thomas Gleixner authored
Provide a wrapper around the existing function and fill the new callbacks in. No functional change as the new callbacks are not yet operational. Signed-off-by:
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Thomas Gleixner authored
Provide a wrapper around the existing function and fill the new callbacks in. No functional change as the new callbacks are not yet operational. Signed-off-by:
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Thomas Gleixner authored
Initialize the split SMP configuration callbacks with NOOPs as MID is strictly ACPI only. Signed-off-by:
Andy Shevchenko <andy.shevchenko@gmail.com> Link: https://lore.kernel.org/r/20240212154639.620189339@linutronix.de
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Thomas Gleixner authored
Select x86_dtb_parse_smp_config() as SMP configuration parser in preparation of splitting up the get_smp_config() callback. Signed-off-by:
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Thomas Gleixner authored
x86_dtb_init() is a misnomer and it really should be used as a SMP configuration parser which is selected by the platform via x86_init::mpparse:parse_smp_config(). Rename it to x86_dtb_parse_smp_config() in preparation for that. Signed-off-by:
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Thomas Gleixner authored
In preparation of splitting the get_smp_config() callback, rename default_get_smp_config() to mpparse_get_smp_config() and provide an early and late wrapper. Signed-off-by:
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Thomas Gleixner authored
The early argument of x86_init::mpparse::get_smp_config() is more than confusing. Provide two callbacks, one for each purpose. Signed-off-by:
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Thomas Gleixner authored
MPTABLE is no longer the default SMP configuration mechanism. Rename it to mpparse_find_mptable() because that's what it does. Signed-off-by:
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Thomas Gleixner authored
No more users. Signed-off-by:
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Thomas Gleixner authored
No need to go through APIC callbacks. It's already established that this is an ancient APIC. So just copy the present mask and use the direct physid* functions all over the place. Signed-off-by:
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Thomas Gleixner authored
No need to go through APIC callbacks. It's already established that this is an ancient APIC. So just copy the present mask and use the direct physid* functions all over the place. Signed-off-by:
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Thomas Gleixner authored
There is no point for this function. The only case where this is used is when there is no XAPIC available, which means the broadcast address is 0xF. Signed-off-by:
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Thomas Gleixner authored
Yet another set_bit() operation wrapped in oring a mask. Signed-off-by:
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Thomas Gleixner authored
There is no point to do that. The ATOMs have an XAPIC for which this function is a pointless exercise. Signed-off-by:
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Thomas Gleixner authored
Detect all possible combinations of mismatch right in the CPUID evaluation code. Signed-off-by:
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Thomas Gleixner authored
The package shift has been already evaluated by the early CPU init. Put the mindless copy right next to the original leaf 0xb parser. Signed-off-by:
Juergen Gross <jgross@suse.com> Tested-by:
Zhang Rui <rui.zhang@intel.com> Tested-by:
Wang Wendy <wendy.wang@intel.com> Tested-by:
K Prateek Nayak <kprateek.nayak@amd.com> Link: https://lore.kernel.org/r/20240212153625.637385562@linutronix.de
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Thomas Gleixner authored
The new topology CPUID parser installs already fake topology for XEN/PV, which ends up with cpuinfo::max_cores = 1. Signed-off-by:
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Thomas Gleixner authored
Now that the core code does not use this monstrosity anymore, it's time to put it to rest. The only real purpose was to read the APIC ID on UV and VSMP systems for the actual evaluation. That's what the core code does now. For doing the actual shift operation there is truly no APIC callback required. Signed-off-by:
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Thomas Gleixner authored
No more users. Signed-off-by:
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Thomas Gleixner authored
No more users. Stick it into the ugly code museum. Signed-off-by:
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Thomas Gleixner authored
Now that everything is converted switch it over and remove the intermediate operation. Signed-off-by:
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Thomas Gleixner authored
cpuinfo::topo::x86_coreid_bits is about to be phased out. Use the core domain size from the topology information. Add a comment why the early MPTABLE parsing is required and decrapify the loop which sets the APIC ID to node map. Signed-off-by:
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Thomas Gleixner authored
Switch it over to use the consolidated topology evaluation and remove the temporary safe guards which are not longer needed. No functional change intended. Signed-off-by:
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Thomas Gleixner authored
Switch it over to the new topology evaluation mechanism and remove the random bits and pieces which are sprinkled all over the place. No functional change intended. Signed-off-by:
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Thomas Gleixner authored
When switching AMD over to the new topology parser then the match functions need to look for AMD systems with the extended topology feature at the new topo.amd_node_id member which is then holding the node id information. Signed-off-by:
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Thomas Gleixner authored
AMD/HYGON uses various methods for topology evaluation: - Leaf 0x80000008 and 0x8000001e based with an optional leaf 0xb, which is the preferred variant for modern CPUs. Leaf 0xb will be superseded by leaf 0x80000026 soon, which is just another variant of the Intel 0x1f leaf for whatever reasons. - Subleaf 0x80000008 and NODEID_MSR base - Legacy fallback That code is following the principle of random bits and pieces all over the place which results in multiple evaluations and impenetrable code flows in the same way as the Intel parsing did. Provide a sane implementation by clearly separating the three variants and bringing them in the proper preference order in one place. This provides the parsing for both AMD and HYGON because there is no point in having a separate HYGON parser which only differs by 3 lines of code. Any further divergence between AMD and HYGON can be handled in different functions, while still sharing the existing parsers. Signed-off-by: -
Thomas Gleixner authored
AMD (ab)uses topology_die_id() to store the Node ID information and topology_max_dies_per_pkg to store the number of nodes per package. This collides with the proper processor die level enumeration which is coming on AMD with CPUID 8000_0026, unless there is a correlation between the two. There is zero documentation about that. So provide new storage and new accessors which for now still access die_id and topology_max_die_per_pkg(). Will be mopped up after AMD and HYGON are converted over. Signed-off-by:
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Thomas Gleixner authored
Intel CPUs use either topology leaf 0xb/0x1f evaluation or the legacy SMP/HT evaluation based on CPUID leaf 0x1/0x4. Move it over to the consolidated topology code and remove the random topology hacks which are sprinkled into the Intel and the common code. No functional change intended. Signed-off-by:
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Thomas Gleixner authored
detect_extended_topology() along with it's early() variant is a classic example for duct tape engineering: - It evaluates an array of subleafs with a boatload of local variables for the relevant topology levels instead of using an array to save the enumerated information and propagate it to the right level - It has no boundary checks for subleafs - It prevents updating the die_id with a crude workaround instead of checking for leaf 0xb which does not provide die information. - It's broken vs. the number of dies evaluation as it uses: num_processors[DIE_LEVEL] / num_processors[CORE_LEVEL] which "works" only correctly if there is none of the intermediate topology levels (MODULE/TILE) enumerated. There is zero value in trying to "fix" that code as the only proper fix is to rewrite it from scratch. Implement a sane parser with proper code documentation, which will be used for the consolidated topology evaluation in the next step. Signed-off-by: -
Thomas Gleixner authored
In preparation of a complete replacement for the topology leaf 0xb/0x1f evaluation, move __max_die_per_package into the common code. Will be removed once everything is converted over. Signed-off-by:
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Thomas Gleixner authored
Centaur and Zhaoxin CPUs use only the legacy SMP detection. Remove the invocations from their 32bit path and exclude them from the 64-bit call path. No functional change intended. Signed-off-by:
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Thomas Gleixner authored
The legacy topology detection via CPUID leaf 4, which provides the number of cores in the package and CPUID leaf 1 which provides the number of logical CPUs in case that FEATURE_HT is enabled and the CMP_LEGACY feature is not set, is shared for Intel, Centaur and Zhaoxin CPUs. Lift the code from common.c without the early detection hack and provide it as common fallback mechanism. Will be utilized in later changes. Signed-off-by:
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Thomas Gleixner authored
Topology evaluation is a complete disaster and impenetrable mess. It's scattered all over the place with some vendor implementations doing early evaluation and some not. The most horrific part is the permanent overwriting of smt_max_siblings and __max_die_per_package, instead of establishing them once on the boot CPU and validating the result on the APs. The goals are: - One topology evaluation entry point - Proper sharing of pointlessly duplicated code - Proper structuring of the evaluation logic and preferences. - Evaluating important system wide information only once on the boot CPU - Making the 0xb/0x1f leaf parsing less convoluted and actually fixing the short comings of leaf 0x1f evaluation. Start to consolidate the topology evaluation code by providing the entry points for the early boot CPU evaluation and for the final parsing on the boot CPU and the APs. Move the trivial pieces into that new code: - The initialization of cpuinfo_x86::topo - The evaluation of CPUID leaf 1, which presets topo::initial_apicid - topo_apicid is set to topo::initial_apicid when invoked from early boot. When invoked for the final evaluation on the boot CPU it reads the actual APIC ID, which makes apic_get_initial_apicid() obsolete once everything is converted over. Provide a temporary helper function topo_converted() which shields off the not yet converted CPU vendors from invoking code which would break them. This shielding covers all vendor CPUs which support SMP, but not the historical pure UP ones as they only need the topology info init and eventually the initial APIC initialization. Provide two new members in cpuinfo_x86::topo to store the maximum number of SMT siblings and the number of dies per package and add them to the debugfs readout. These two members will be used to populate this information on the boot CPU and to validate the APs against it. Signed-off-by:Peter Zijlstra (Intel) <peterz@infradead.org> Tested-by:
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Thomas Gleixner authored
Provide a few helper functions to read CPUID leafs or individual registers into a data structure without requiring unions. Signed-off-by:
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- 11 Feb, 2024 3 commits
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Linus Torvalds authored
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull timer fix from Borislav Petkov: - Make sure a warning is issued when a hrtimer gets queued after the timers have been migrated on the CPU down path and thus said timer will get ignored * tag 'timers_urgent_for_v6.8_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: hrtimer: Report offline hrtimer enqueue
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 fixes from Borislav Petkov: - Correct the minimum CPU family for Transmeta Crusoe in Kconfig so that such hw can boot again - Do not take into accout XSTATE buffer size info supplied by userspace when constructing a sigreturn frame - Switch get_/put_user* to EX_TYPE_UACCESS exception handling when an MCE is encountered so that it can be properly recovered from instead of simply panicking * tag 'x86_urgent_for_v6.8_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/Kconfig: Transmeta Crusoe is CPU family 5, not 6 x86/fpu: Stop relying on userspace for info to fault in xsave buffer x86/lib: Revert to _ASM_EXTABLE_UA() for {get,put}_user() fixups
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- 10 Feb, 2024 1 commit
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Linus Torvalds authored
Merge tag 'mm-hotfixes-stable-2024-02-10-11-16' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull misc fixes from Andrew Morton: "21 hotfixes. 12 are cc:stable and the remainder pertain to post-6.7 issues or aren't considered to be needed in earlier kernel versions" * tag 'mm-hotfixes-stable-2024-02-10-11-16' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (21 commits) nilfs2: fix potential bug in end_buffer_async_write mm/damon/sysfs-schemes: fix wrong DAMOS tried regions update timeout setup nilfs2: fix hang in nilfs_lookup_dirty_data_buffers() MAINTAINERS: Leo Yan has moved mm/zswap: don't return LRU_SKIP if we have dropped lru lock fs,hugetlb: fix NULL pointer dereference in hugetlbs_fill_super mailmap: switch email address for John Moon mm: zswap: fix objcg use-after-free in entry destruction mm/madvise: don't forget to leave lazy MMU mode in madvise_cold_or_pageout_pte_range() arch/arm/mm: fix major fault accounting when retrying under per-VMA lock selftests: core: include linux/close_range.h for CLOSE_RANGE_* macros mm/memory-failure: fix crash in split_huge_page_to_list from soft_offline_page mm: memcg: optimize parent iteration in memcg_rstat_updated() nilfs2: fix data corruption in dsync block recovery for small block sizes mm/userfaultfd: UFFDIO_MOVE implementation should use ptep_get() exit: wait_task_zombie: kill the no longer necessary spin_lock_irq(siglock) fs/proc: do_task_stat: use sig->stats_lock to gather the threads/children stats fs/proc: do_task_stat: move thread_group_cputime_adjusted() outside of lock_task_sighand() getrusage: use sig->stats_lock rather than lock_task_sighand() getrusage: move thread_group_cputime_adjusted() outside of lock_task_sighand() ...
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