Re: [RFC PATCH v2 17/27] x86/cet/shstk: User-mode shadow stack support
From: Dave Hansen <dave.hansen@linux.intel.com>
Date: 2018-07-10 23:40:40
Also in:
linux-api, linux-arch, linux-mm, lkml
On 07/10/2018 03:26 PM, Yu-cheng Yu wrote:
quoted hunk ↗ jump to hunk
+static __init int setup_disable_shstk(char *s) +{ + /* require an exact match without trailing characters */ + if (strlen(s)) + return 0; + + if (!boot_cpu_has(X86_FEATURE_SHSTK)) + return 1; + + setup_clear_cpu_cap(X86_FEATURE_SHSTK); + pr_info("x86: 'no_cet_shstk' specified, disabling Shadow Stack\n"); + return 1; +} +__setup("no_cet_shstk", setup_disable_shstk);
Why do we need a boot-time disable for this? -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html