On Sun, Feb 23, 2025 at 02:48:54PM -0500, Rik van Riel wrote:
> Use broadcast TLB invalidation for kernel addresses when available.
>
> Remove the need to send IPIs for kernel TLB flushes.
>
> Signed-off-by: Rik van Riel <riel@xxxxxxxxxxx>
> Reviewed-by: Nadav Amit <nadav.amit@xxxxxxxxx>
> Tested-by: Manali Shukla <Manali.Shukla@xxxxxxx>
> Tested-by: Brendan Jackman <jackmanb@xxxxxxxxxx>
> Tested-by: Michael Kelley <mhklinux@xxxxxxxxxxx>
What's the point of keeping those Tested-by tags if you still keep changing
the patchset?
> ---
> arch/x86/mm/tlb.c | 34 ++++++++++++++++++++++++++++++++--
> 1 file changed, 32 insertions(+), 2 deletions(-)
>
> diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
> index dbcb5c968ff9..59396a3c6e9c 100644
> --- a/arch/x86/mm/tlb.c
> +++ b/arch/x86/mm/tlb.c
> @@ -1077,6 +1077,20 @@ void flush_tlb_all(void)
> on_each_cpu(do_flush_tlb_all, NULL, 1);
> }
>
> +static bool invlpgb_kernel_range_flush(struct flush_tlb_info *info)
> +{
> + unsigned long addr;
> + unsigned long nr;
Oh, c'mon:
unsigned long addr, nr;
> +
> + for (addr = info->start; addr < info->end; addr += nr << PAGE_SHIFT) {
> + nr = (info->end - addr) >> PAGE_SHIFT;
> + nr = clamp_val(nr, 1, invlpgb_count_max);
> + invlpgb_flush_addr_nosync(addr, nr);
> + }
> + __tlbsync();
> + return true;
Unused retval - that function looks like it wants to be void.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
