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release 6.14.7

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This commit is contained in:
Konstantin Demin
2025-05-18 12:32:18 +03:00
parent 5c06d65ded
commit a5a8a2798d
48 changed files with 215 additions and 737 deletions
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87
debian/patches/patchset-pf/invlpgb/0003-x86-mm-Consolidate-full-flush-threshold-decision.patch vendored Normal file
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@@ -0,0 +1,87 @@
From 170f37d1499a28f7a1902e007111867c7cf0147f Mon Sep 17 00:00:00 2001
From: Rik van Riel <riel@surriel.com>
Date: Tue, 25 Feb 2025 22:00:36 -0500
Subject: x86/mm: Consolidate full flush threshold decision
Reduce code duplication by consolidating the decision point for whether to do
individual invalidations or a full flush inside get_flush_tlb_info().
Suggested-by: Dave Hansen <dave.hansen@intel.com>
Signed-off-by: Rik van Riel <riel@surriel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Borislav Petkov (AMD) <bp@alien8.de>
Acked-by: Dave Hansen <dave.hansen@intel.com>
Link: https://lore.kernel.org/r/20250226030129.530345-2-riel@surriel.com
---
arch/x86/mm/tlb.c | 41 +++++++++++++++++++----------------------
1 file changed, 19 insertions(+), 22 deletions(-)
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -1019,6 +1019,15 @@ static struct flush_tlb_info *get_flush_
BUG_ON(this_cpu_inc_return(flush_tlb_info_idx) != 1);
#endif
+ /*
+ * If the number of flushes is so large that a full flush
+ * would be faster, do a full flush.
+ */
+ if ((end - start) >> stride_shift > tlb_single_page_flush_ceiling) {
+ start = 0;
+ end = TLB_FLUSH_ALL;
+ }
+
info->start = start;
info->end = end;
info->mm = mm;
@@ -1045,17 +1054,8 @@ void flush_tlb_mm_range(struct mm_struct
bool freed_tables)
{
struct flush_tlb_info *info;
+ int cpu = get_cpu();
u64 new_tlb_gen;
- int cpu;
-
- cpu = get_cpu();
-
- /* Should we flush just the requested range? */
- if ((end == TLB_FLUSH_ALL) ||
- ((end - start) >> stride_shift) > tlb_single_page_flush_ceiling) {
- start = 0;
- end = TLB_FLUSH_ALL;
- }
/* This is also a barrier that synchronizes with switch_mm(). */
new_tlb_gen = inc_mm_tlb_gen(mm);
@@ -1108,22 +1108,19 @@ static void do_kernel_range_flush(void *
void flush_tlb_kernel_range(unsigned long start, unsigned long end)
{
- /* Balance as user space task's flush, a bit conservative */
- if (end == TLB_FLUSH_ALL ||
- (end - start) > tlb_single_page_flush_ceiling << PAGE_SHIFT) {
- on_each_cpu(do_flush_tlb_all, NULL, 1);
- } else {
- struct flush_tlb_info *info;
+ struct flush_tlb_info *info;
- preempt_disable();
- info = get_flush_tlb_info(NULL, start, end, 0, false,
- TLB_GENERATION_INVALID);
+ guard(preempt)();
+ info = get_flush_tlb_info(NULL, start, end, PAGE_SHIFT, false,
+ TLB_GENERATION_INVALID);
+
+ if (info->end == TLB_FLUSH_ALL)
+ on_each_cpu(do_flush_tlb_all, NULL, 1);
+ else
on_each_cpu(do_kernel_range_flush, info, 1);
- put_flush_tlb_info();
- preempt_enable();
- }
+ put_flush_tlb_info();
}
/*