Re: [PATCH] accel/kvm: Adjust the note about the minimum required kernel version

[Zhao Liu <zhao1.liu@intel.com>]

On Wed, Jul 02, 2025 at 08:03:19AM +0200, Thomas Huth wrote:
> Date: Wed,  2 Jul 2025 08:03:19 +0200
> From: Thomas Huth <thuth@redhat.com>
> Subject: [PATCH] accel/kvm: Adjust the note about the minimum required
>  kernel version
> 
> From: Thomas Huth <thuth@redhat.com>
> 
> Since commit 126e7f78036 ("kvm: require KVM_CAP_IOEVENTFD and
> KVM_CAP_IOEVENTFD_ANY_LENGTH") we require at least kernel 4.4 to
> be able to use KVM. Adjust the upgrade_note accordingly.
> While we're at it, remove the text about kvm-kmod and the
> SourceForge URL since this is not actively maintained anymore.
> 
> Fixes: 126e7f78036 ("kvm: require KVM_CAP_IOEVENTFD and KVM_CAP_IOEVENTFD_ANY_LENGTH")
> Signed-off-by: Thomas Huth <thuth@redhat.com>
> ---
>  accel/kvm/kvm-all.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)

I just mentioned the kernel version in another patch thread. I found
x86 doc said it requires v4.5 or newer ("OS requirements" section in
docs/system/target-i386.rst).

> diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
> index d095d1b98f8..e3302b087f4 100644
> --- a/accel/kvm/kvm-all.c
> +++ b/accel/kvm/kvm-all.c
> @@ -2571,8 +2571,7 @@ static int kvm_init(MachineState *ms)
>  {
>      MachineClass *mc = MACHINE_GET_CLASS(ms);
>      static const char upgrade_note[] =
> -        "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
> -        "(see http://sourceforge.net/projects/kvm).\n";
> +        "Please upgrade to at least kernel 4.4.\n";
>      const struct {
>          const char *name;
>          int num;
> -- 
> 2.50.0
> 
>