From mboxrd@z Thu Jan 1 00:00:00 1970 From: Darren Kenny Subject: Re: [PATCH v2 1/6] x86/speculation: Update Speculation Control microcode blacklist Date: Mon, 12 Feb 2018 09:50:16 +0000 Message-ID: <20180212095016.i5w3iimemu74ypf6@starbug-vm.ie.oracle.com> References: <1518305967-31356-1-git-send-email-dwmw@amazon.co.uk> <1518305967-31356-2-git-send-email-dwmw@amazon.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Cc: tglx@linutronix.de, karahmed@amazon.de, sironi@amazon.de, x86@kernel.org, kvm@vger.kernel.org, torvalds@linux-foundation.org, pbonzini@redhat.com, linux-kernel@vger.kernel.org, bp@alien8.de, peterz@infradead.org, jmattson@google.com, rkrcmar@redhat.com, arjan.van.de.ven@intel.com, dave.hansen@intel.com To: David Woodhouse Return-path: Content-Disposition: inline In-Reply-To: <1518305967-31356-2-git-send-email-dwmw@amazon.co.uk> Sender: linux-kernel-owner@vger.kernel.org List-Id: kvm.vger.kernel.org On Sat, Feb 10, 2018 at 11:39:22PM +0000, David Woodhouse wrote: >Intel have retroactively blessed the 0xc2 microcode on Skylake mobile >and desktop parts, and the Gemini Lake 0x22 microcode is apparently fine >too. We blacklisted the latter purely because it was present with all >the other problematic ones in the 2018-01-08 release, but now it's >explicitly listed as OK. > >We still list 0x84 for the various Kaby Lake / Coffee Lake parts, as >that appeared in one version of the blacklist and then reverted to >0x80 again. We can change it if 0x84 is actually announced to be safe. > >Signed-off-by: David Woodhouse Reviewed-by: Darren Kenny >--- > arch/x86/kernel/cpu/intel.c | 4 ---- > 1 file changed, 4 deletions(-) > >diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c >index 319bf98..f73b814 100644 >--- a/arch/x86/kernel/cpu/intel.c >+++ b/arch/x86/kernel/cpu/intel.c >@@ -123,8 +123,6 @@ static const struct sku_microcode spectre_bad_microcodes[] = { > { INTEL_FAM6_KABYLAKE_MOBILE, 0x09, 0x84 }, > { INTEL_FAM6_SKYLAKE_X, 0x03, 0x0100013e }, > { INTEL_FAM6_SKYLAKE_X, 0x04, 0x0200003c }, >- { INTEL_FAM6_SKYLAKE_MOBILE, 0x03, 0xc2 }, >- { INTEL_FAM6_SKYLAKE_DESKTOP, 0x03, 0xc2 }, > { INTEL_FAM6_BROADWELL_CORE, 0x04, 0x28 }, > { INTEL_FAM6_BROADWELL_GT3E, 0x01, 0x1b }, > { INTEL_FAM6_BROADWELL_XEON_D, 0x02, 0x14 }, >@@ -136,8 +134,6 @@ static const struct sku_microcode spectre_bad_microcodes[] = { > { INTEL_FAM6_HASWELL_X, 0x02, 0x3b }, > { INTEL_FAM6_HASWELL_X, 0x04, 0x10 }, > { INTEL_FAM6_IVYBRIDGE_X, 0x04, 0x42a }, >- /* Updated in the 20180108 release; blacklist until we know otherwise */ >- { INTEL_FAM6_ATOM_GEMINI_LAKE, 0x01, 0x22 }, > /* Observed in the wild */ > { INTEL_FAM6_SANDYBRIDGE_X, 0x06, 0x61b }, > { INTEL_FAM6_SANDYBRIDGE_X, 0x07, 0x712 }, >-- >2.7.4 >