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A couple of SME updates for recent fixes (one of which went to stable):

Browse Source 
reverting the flushing of the SME hardware state along with the thread
 flushing and making sure we have the correct vector length before
 reallocating.
 
 An ACPI/IORT fix to avoid skipping ID mappings whose "number of IDs" is
 0 (the spec reports the number of IDs in the mapping range minus 1).
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Catalin Marinas:

 - A couple of SME updates for recent fixes (one of which went to
   stable): reverting the flushing of the SME hardware state along with
   the thread flushing and making sure we have the correct vector length
   before reallocating.

 - An ACPI/IORT fix to avoid skipping ID mappings whose "number of IDs"
   is 0 (the spec reports the number of IDs in the mapping range minus
   1).

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  ACPI/IORT: Remove erroneous id_count check in iort_node_get_rmr_info()
  arm64/sme: Set new vector length before reallocating
  arm64/fpsimd: Don't flush SME register hardware state along with thread
This commit is contained in:
Linus Torvalds 2023-07-28 11:21:57 -07:00
commit f837f0a3c9
2 changed files with 2 additions and 6 deletions
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5
arch/arm64/kernel/fpsimd.c
View File

@ -917,6 +917,8 @@ int vec_set_vector_length(struct task_struct *task, enum vec_type type,
if (task == current)
put_cpu_fpsimd_context();
task_set_vl(task, type, vl);
/*
* Free the changed states if they are not in use, SME will be
* reallocated to the correct size on next use and we just
@ -931,8 +933,6 @@ int vec_set_vector_length(struct task_struct *task, enum vec_type type,
if (free_sme)
sme_free(task);
task_set_vl(task, type, vl);
out:
update_tsk_thread_flag(task, vec_vl_inherit_flag(type),
flags & PR_SVE_VL_INHERIT);
@ -1666,7 +1666,6 @@ void fpsimd_flush_thread(void)
fpsimd_flush_thread_vl(ARM64_VEC_SME);
current->thread.svcr = 0;
sme_smstop();
}
current->thread.fp_type = FP_STATE_FPSIMD;

3
drivers/acpi/arm64/iort.c
View File

@ -1007,9 +1007,6 @@ static void iort_node_get_rmr_info(struct acpi_iort_node *node,
for (i = 0; i < node->mapping_count; i++, map++) {
struct acpi_iort_node *parent;
if (!map->id_count)
continue;
parent = ACPI_ADD_PTR(struct acpi_iort_node, iort_table,
map->output_reference);
if (parent != iommu)