On Tue, Feb 13, 2018 at 01:34:07PM +0000, Nick Lowe wrote: > Hi, > > This does not seem to have subsumed the AMD specific code in > > x86/pti: Do not enable PTI on CPUs which are not vulnerable to Meltdown > Commit a8799fd14d9f7f385a5a5c86cde247caf4bb0320 > > https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?h=v4.9.81&id=a8799fd14d9f7f385a5a5c86cde247caf4bb0320 > > x86/kaiser: Check boottime cmdline params > Commit 8018307a45a90ab2eecfd03d48b7efb31707df37 > > https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/arch/x86/mm/kaiser.c?h=v4.9.75&id=8018307a45a90ab2eecfd03d48b7efb31707df37 > > Here, we can see: > > +skip: > + if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) > + goto disable; > > Refer to 4.9.81's kaiser.c > https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/tree/arch/x86/mm/kaiser.c?h=v4.9.81 > > Also 4.4.115's kaiser.c > https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/tree/arch/x86/mm/kaiser.c?h=v4.4.115 So, any hints on what you think should be the correct fix here? thanks, greg k-h