Re: [PATCH] LoongArch: Fix acpi_package_ids array overflow

[Huacai Chen]

On Tue, Aug 4, 2026 at 4:57 PM Tao Cui <cui.tao@xxxxxxxxx> wrote:
>
>
>
> 在 2026/8/4 15:57, Bibo Mao 写道:
> > With LoongArch virt machine, one typical setting is one core per socket,
> > there will max 256 sockets on one VM. With PPTT acpi table, array
> > acpi_package_ids will be overflowed.
> >
> > Here change array size of acpi_package_ids with max value of
> > MAX_PACKAGES and KVM_MAX_VCPUS.
> >
> > Fixes: 4e8f58620f67 ("LoongArch: Retrieve CPU package ID from PPTT when available")
> > Cc: stable@xxxxxxxxxxxxxxx
> > Signed-off-by: Bibo Mao <maobibo@xxxxxxxxxxx>
> > ---
> >  arch/loongarch/kernel/acpi.c | 3 ++-
> >  1 file changed, 2 insertions(+), 1 deletion(-)
> >
> > diff --git a/arch/loongarch/kernel/acpi.c b/arch/loongarch/kernel/acpi.c
> > index 873e90990771..cb454ee92b20 100644
> > --- a/arch/loongarch/kernel/acpi.c
> > +++ b/arch/loongarch/kernel/acpi.c
> > @@ -13,6 +13,7 @@
> >  #include <linux/export.h>
> >  #include <linux/irq.h>
> >  #include <linux/irqdomain.h>
> > +#include <linux/kvm_host.h>
> >  #include <linux/memblock.h>
> >  #include <linux/of_fdt.h>
> >  #include <linux/serial_core.h>
> > @@ -202,7 +203,7 @@ static void __init acpi_process_madt(void)
> >
> >  int pptt_enabled;
> >  static int acpi_nr_packages;
> > -static int acpi_package_ids[MAX_PACKAGES];
> > +static int acpi_package_ids[MAX(MAX_PACKAGES, KVM_MAX_VCPUS)];
> >
> >  int __init parse_acpi_topology(void)
> >  {
> >
> > base-commit: 075b74841bd0065a3bda3440873c747938e69b68
> Reviewed-by: Tao Cui <cuitao@xxxxxxxxxx>
Applied, thanks.

Huacai
>