diff options
Diffstat (limited to 'common/recipes-kernel/linux/linux-yocto-4.9.21/0034-x86-speculation-Create-spec-ctrl.h-to-avoid-include-.patch')
| -rw-r--r-- | common/recipes-kernel/linux/linux-yocto-4.9.21/0034-x86-speculation-Create-spec-ctrl.h-to-avoid-include-.patch | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/common/recipes-kernel/linux/linux-yocto-4.9.21/0034-x86-speculation-Create-spec-ctrl.h-to-avoid-include-.patch b/common/recipes-kernel/linux/linux-yocto-4.9.21/0034-x86-speculation-Create-spec-ctrl.h-to-avoid-include-.patch new file mode 100644 index 00000000..36224a56 --- /dev/null +++ b/common/recipes-kernel/linux/linux-yocto-4.9.21/0034-x86-speculation-Create-spec-ctrl.h-to-avoid-include-.patch @@ -0,0 +1,141 @@ +From b8380a76b18fa5522368b50c284530fc6e1b1992 Mon Sep 17 00:00:00 2001 +From: Thomas Gleixner <tglx@linutronix.de> +Date: Sun, 29 Apr 2018 15:01:37 +0200 +Subject: [PATCH 34/93] x86/speculation: Create spec-ctrl.h to avoid include + hell + +commit 28a2775217b17208811fa43a9e96bd1fdf417b86 upstream + +Having everything in nospec-branch.h creates a hell of dependencies when +adding the prctl based switching mechanism. Move everything which is not +required in nospec-branch.h to spec-ctrl.h and fix up the includes in the +relevant files. + +Signed-off-by: Thomas Gleixner <tglx@linutronix.de> +Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> +Reviewed-by: Ingo Molnar <mingo@kernel.org> +Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + arch/x86/include/asm/nospec-branch.h | 14 -------------- + arch/x86/include/asm/spec-ctrl.h | 21 +++++++++++++++++++++ + arch/x86/kernel/cpu/amd.c | 2 +- + arch/x86/kernel/cpu/bugs.c | 2 +- + arch/x86/kvm/svm.c | 2 +- + arch/x86/kvm/vmx.c | 2 +- + 6 files changed, 25 insertions(+), 18 deletions(-) + create mode 100644 arch/x86/include/asm/spec-ctrl.h + +diff --git a/arch/x86/include/asm/nospec-branch.h b/arch/x86/include/asm/nospec-branch.h +index 3a1541c..1119f14 100644 +--- a/arch/x86/include/asm/nospec-branch.h ++++ b/arch/x86/include/asm/nospec-branch.h +@@ -228,26 +228,12 @@ enum spectre_v2_mitigation { + extern void x86_spec_ctrl_set(u64); + extern u64 x86_spec_ctrl_get_default(void); + +-/* +- * On VMENTER we must preserve whatever view of the SPEC_CTRL MSR +- * the guest has, while on VMEXIT we restore the host view. This +- * would be easier if SPEC_CTRL were architecturally maskable or +- * shadowable for guests but this is not (currently) the case. +- * Takes the guest view of SPEC_CTRL MSR as a parameter. +- */ +-extern void x86_spec_ctrl_set_guest(u64); +-extern void x86_spec_ctrl_restore_host(u64); +- + /* The Speculative Store Bypass disable variants */ + enum ssb_mitigation { + SPEC_STORE_BYPASS_NONE, + SPEC_STORE_BYPASS_DISABLE, + }; + +-/* AMD specific Speculative Store Bypass MSR data */ +-extern u64 x86_amd_ls_cfg_base; +-extern u64 x86_amd_ls_cfg_rds_mask; +- + extern char __indirect_thunk_start[]; + extern char __indirect_thunk_end[]; + +diff --git a/arch/x86/include/asm/spec-ctrl.h b/arch/x86/include/asm/spec-ctrl.h +new file mode 100644 +index 0000000..3ad6442 +--- /dev/null ++++ b/arch/x86/include/asm/spec-ctrl.h +@@ -0,0 +1,21 @@ ++/* SPDX-License-Identifier: GPL-2.0 */ ++#ifndef _ASM_X86_SPECCTRL_H_ ++#define _ASM_X86_SPECCTRL_H_ ++ ++#include <asm/nospec-branch.h> ++ ++/* ++ * On VMENTER we must preserve whatever view of the SPEC_CTRL MSR ++ * the guest has, while on VMEXIT we restore the host view. This ++ * would be easier if SPEC_CTRL were architecturally maskable or ++ * shadowable for guests but this is not (currently) the case. ++ * Takes the guest view of SPEC_CTRL MSR as a parameter. ++ */ ++extern void x86_spec_ctrl_set_guest(u64); ++extern void x86_spec_ctrl_restore_host(u64); ++ ++/* AMD specific Speculative Store Bypass MSR data */ ++extern u64 x86_amd_ls_cfg_base; ++extern u64 x86_amd_ls_cfg_rds_mask; ++ ++#endif +diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c +index 7551d9ad..a176c81 100644 +--- a/arch/x86/kernel/cpu/amd.c ++++ b/arch/x86/kernel/cpu/amd.c +@@ -9,7 +9,7 @@ + #include <asm/processor.h> + #include <asm/apic.h> + #include <asm/cpu.h> +-#include <asm/nospec-branch.h> ++#include <asm/spec-ctrl.h> + #include <asm/smp.h> + #include <asm/pci-direct.h> + #include <asm/delay.h> +diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c +index b3696cc..46d01fd 100644 +--- a/arch/x86/kernel/cpu/bugs.c ++++ b/arch/x86/kernel/cpu/bugs.c +@@ -12,7 +12,7 @@ + #include <linux/cpu.h> + #include <linux/module.h> + +-#include <asm/nospec-branch.h> ++#include <asm/spec-ctrl.h> + #include <asm/cmdline.h> + #include <asm/bugs.h> + #include <asm/processor.h> +diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c +index 43736dd..47779f5 100644 +--- a/arch/x86/kvm/svm.c ++++ b/arch/x86/kvm/svm.c +@@ -45,7 +45,7 @@ + #include <asm/kvm_para.h> + #include <asm/irq_remapping.h> + #include <asm/microcode.h> +-#include <asm/nospec-branch.h> ++#include <asm/spec-ctrl.h> + + #include <asm/virtext.h> + #include "trace.h" +diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c +index 3210add..17199dc 100644 +--- a/arch/x86/kvm/vmx.c ++++ b/arch/x86/kvm/vmx.c +@@ -50,7 +50,7 @@ + #include <asm/apic.h> + #include <asm/irq_remapping.h> + #include <asm/microcode.h> +-#include <asm/nospec-branch.h> ++#include <asm/spec-ctrl.h> + + #include "trace.h" + #include "pmu.h" +-- +2.7.4 + |