On Fri, Nov 14, 2025 at 07:57:35PM +0000, Steven Noonan wrote:
On a Xen dom0 boot, this feature does not behave, and we end up calculating:
num_roots = 1 num_nodes = 2 roots_per_node = 0This causes a divide-by-zero in the modulus inside the loop.
This change adds a couple of guards for invalid states where we might get a divide-by-zero.
Signed-off-by: Steven Noonan steven@uplinklabs.net Signed-off-by: Ariadne Conill ariadne@ariadne.space CC: Yazen Ghannam yazen.ghannam@amd.com CC: x86@vger.kernel.org CC: stable@vger.kernel.org
arch/x86/kernel/amd_node.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/arch/x86/kernel/amd_node.c b/arch/x86/kernel/amd_node.c index 3d0a4768d603c..cdc6ba224d4ad 100644 --- a/arch/x86/kernel/amd_node.c +++ b/arch/x86/kernel/amd_node.c @@ -282,6 +282,17 @@ static int __init amd_smn_init(void)
That better not be loading at all on a X86_FEATURE_HYPERVISOR configuration.