On Oct 26, 2021, at 8:54 AM, Dave Hansen [off-list ref] wrote:

On 10/21/21 5:21 AM, Nadav Amit wrote:

quoted

--- a/arch/x86/kernel/cpu/intel.c
+++ b/arch/x86/kernel/cpu/intel.c

@@ -296,6 +296,11 @@ static void early_init_intel(struct cpuinfo_x86 *c)

		}
	}

+	if (c->x86_model == 87) {
+		pr_info_once("Enabling PTE leaking workaround\n");
+		set_cpu_bug(c, X86_BUG_PTE_LEAK);
+	}

Please take a look at:

	arch/x86/include/asm/intel-family.h

specifically:

#define INTEL_FAM6_XEON_PHI_KNL         0x57 /* Knights Landing */

Thanks, I will fix it. I really just copy pasted from Andi’s patch
(for better and worse).