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authorThomas Gleixner <tglx@linutronix.de>2018-04-29 15:01:37 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2018-05-22 18:54:03 +0200
commit81c3c2b5917af382a90d116a5ccd034fe5d32c2a (patch)
tree91748afd86b6dcd5095dbf4fc1616daac6f34d69
parent97224b3da69810155b44f173cc8959eea565a98d (diff)
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--arch/x86/include/asm/nospec-branch.h14
-rw-r--r--arch/x86/include/asm/spec-ctrl.h21
-rw-r--r--arch/x86/kernel/cpu/amd.c2
-rw-r--r--arch/x86/kernel/cpu/bugs.c2
-rw-r--r--arch/x86/kvm/svm.c2
-rw-r--r--arch/x86/kvm/vmx.c2
6 files changed, 25 insertions, 18 deletions
diff --git a/arch/x86/include/asm/nospec-branch.h b/arch/x86/include/asm/nospec-branch.h
index 3a1541cf32de..1119f14bc883 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 000000000000..3ad64420a06e
--- /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 f18be6184630..5426ec89414a 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -10,7 +10,7 @@
#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 86cdf635636d..ec171873167a 100644
--- a/arch/x86/kernel/cpu/bugs.c
+++ b/arch/x86/kernel/cpu/bugs.c
@@ -13,7 +13,7 @@
#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 2625bae3ac5a..f432968fe42e 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -46,7 +46,7 @@
#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 7a00b5d3c645..25ba4fd82a0f 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -52,7 +52,7 @@
#include <asm/irq_remapping.h>
#include <asm/mmu_context.h>
#include <asm/microcode.h>
-#include <asm/nospec-branch.h>
+#include <asm/spec-ctrl.h>
#include "trace.h"
#include "pmu.h"