This is a note to let you know that I've just added the patch titled
x86/msr: Add definitions for new speculation control MSRs
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-msr-add-definitions-for-new-speculation-control-msrs.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Wed Feb 7 19:38:23 CST 2018
From: David Woodhouse <dwmw@xxxxxxxxxxxx>
Date: Thu, 25 Jan 2018 16:14:12 +0000
Subject: x86/msr: Add definitions for new speculation control MSRs
From: David Woodhouse <dwmw@xxxxxxxxxxxx>
(cherry picked from commit 1e340c60d0dd3ae07b5bedc16a0469c14b9f3410)
Add MSR and bit definitions for SPEC_CTRL, PRED_CMD and ARCH_CAPABILITIES.
See Intel's 336996-Speculative-Execution-Side-Channel-Mitigations.pdf
Signed-off-by: David Woodhouse <dwmw@xxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: gnomes@xxxxxxxxxxxxxxxxxxx
Cc: ak@xxxxxxxxxxxxxxx
Cc: ashok.raj@xxxxxxxxx
Cc: dave.hansen@xxxxxxxxx
Cc: karahmed@xxxxxxxxx
Cc: arjan@xxxxxxxxxxxxxxx
Cc: torvalds@xxxxxxxxxxxxxxxxxxxx
Cc: peterz@xxxxxxxxxxxxx
Cc: bp@xxxxxxxxx
Cc: pbonzini@xxxxxxxxxx
Cc: tim.c.chen@xxxxxxxxxxxxxxx
Cc: gregkh@xxxxxxxxxxxxxxxxxxxx
Link: https://lkml.kernel.org/r/1516896855-7642-5-git-send-email-dwmw@xxxxxxxxxxxx
Signed-off-by: David Woodhouse <dwmw@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/include/asm/msr-index.h | 12 ++++++++++++
1 file changed, 12 insertions(+)
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -37,6 +37,13 @@
#define EFER_FFXSR (1<<_EFER_FFXSR)
/* Intel MSRs. Some also available on other CPUs */
+#define MSR_IA32_SPEC_CTRL 0x00000048 /* Speculation Control */
+#define SPEC_CTRL_IBRS (1 << 0) /* Indirect Branch Restricted Speculation */
+#define SPEC_CTRL_STIBP (1 << 1) /* Single Thread Indirect Branch Predictors */
+
+#define MSR_IA32_PRED_CMD 0x00000049 /* Prediction Command */
+#define PRED_CMD_IBPB (1 << 0) /* Indirect Branch Prediction Barrier */
+
#define MSR_IA32_PERFCTR0 0x000000c1
#define MSR_IA32_PERFCTR1 0x000000c2
#define MSR_FSB_FREQ 0x000000cd
@@ -50,6 +57,11 @@
#define SNB_C3_AUTO_UNDEMOTE (1UL << 28)
#define MSR_MTRRcap 0x000000fe
+
+#define MSR_IA32_ARCH_CAPABILITIES 0x0000010a
+#define ARCH_CAP_RDCL_NO (1 << 0) /* Not susceptible to Meltdown */
+#define ARCH_CAP_IBRS_ALL (1 << 1) /* Enhanced IBRS support */
+
#define MSR_IA32_BBL_CR_CTL 0x00000119
#define MSR_IA32_BBL_CR_CTL3 0x0000011e
Patches currently in stable-queue which might be from dwmw@xxxxxxxxxxxx are
queue-4.9/kvm-vmx-introduce-alloc_loaded_vmcs.patch
queue-4.9/kvm-nvmx-eliminate-vmcs02-pool.patch
queue-4.9/kvm-vmx-allow-direct-access-to-msr_ia32_spec_ctrl.patch
queue-4.9/kvm-x86-add-ibpb-support.patch
queue-4.9/kvm-svm-allow-direct-access-to-msr_ia32_spec_ctrl.patch
queue-4.9/x86-cpufeatures-add-intel-feature-bits-for-speculation-control.patch
queue-4.9/x86-cpufeatures-add-cpuid_7_edx-cpuid-leaf.patch
queue-4.9/kvm-x86-make-indirect-calls-in-emulator-speculation-safe.patch
queue-4.9/x86-cpufeature-blacklist-spec_ctrl-pred_cmd-on-early-spectre-v2-microcodes.patch
queue-4.9/kvm-vmx-make-indirect-call-speculation-safe.patch
queue-4.9/x86-cpufeatures-add-amd-feature-bits-for-speculation-control.patch
queue-4.9/module-retpoline-warn-about-missing-retpoline-in-module.patch
queue-4.9/kvm-nvmx-vmx_complete_nested_posted_interrupt-can-t-fail.patch
queue-4.9/x86-msr-add-definitions-for-new-speculation-control-msrs.patch
queue-4.9/x86-pti-make-unpoison-of-pgd-for-trusted-boot-work-for-real.patch
queue-4.9/kvm-vmx-make-msr-bitmaps-per-vcpu.patch
queue-4.9/kvm-nvmx-mark-vmcs12-pages-dirty-on-l2-exit.patch
queue-4.9/kvm-vmx-emulate-msr_ia32_arch_capabilities.patch
queue-4.9/x86-retpoline-remove-the-esp-rsp-thunk.patch
queue-4.9/x86-pti-do-not-enable-pti-on-cpus-which-are-not-vulnerable-to-meltdown.patch