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authorLinus Torvalds <torvalds@linux-foundation.org>2024-03-12 05:53:15 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2024-03-12 05:53:15 +0300
commit685d98211273f60e38a6d361b62d7016c545297e (patch)
tree76c3be7af88578437c72325c322a52a12be3d05d /include
parentfcc196579aa1fc167d6778948bff69fae6116737 (diff)
parent35ce64922c8263448e58a2b9e8d15a64e11e9b2d (diff)
downloadlinux-685d98211273f60e38a6d361b62d7016c545297e.tar.xz
Merge tag 'x86-core-2024-03-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull core x86 updates from Ingo Molnar: - The biggest change is the rework of the percpu code, to support the 'Named Address Spaces' GCC feature, by Uros Bizjak: - This allows C code to access GS and FS segment relative memory via variables declared with such attributes, which allows the compiler to better optimize those accesses than the previous inline assembly code. - The series also includes a number of micro-optimizations for various percpu access methods, plus a number of cleanups of %gs accesses in assembly code. - These changes have been exposed to linux-next testing for the last ~5 months, with no known regressions in this area. - Fix/clean up __switch_to()'s broken but accidentally working handling of FPU switching - which also generates better code - Propagate more RIP-relative addressing in assembly code, to generate slightly better code - Rework the CPU mitigations Kconfig space to be less idiosyncratic, to make it easier for distros to follow & maintain these options - Rework the x86 idle code to cure RCU violations and to clean up the logic - Clean up the vDSO Makefile logic - Misc cleanups and fixes * tag 'x86-core-2024-03-11' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (52 commits) x86/idle: Select idle routine only once x86/idle: Let prefer_mwait_c1_over_halt() return bool x86/idle: Cleanup idle_setup() x86/idle: Clean up idle selection x86/idle: Sanitize X86_BUG_AMD_E400 handling sched/idle: Conditionally handle tick broadcast in default_idle_call() x86: Increase brk randomness entropy for 64-bit systems x86/vdso: Move vDSO to mmap region x86/vdso/kbuild: Group non-standard build attributes and primary object file rules together x86/vdso: Fix rethunk patching for vdso-image-{32,64}.o x86/retpoline: Ensure default return thunk isn't used at runtime x86/vdso: Use CONFIG_COMPAT_32 to specify vdso32 x86/vdso: Use $(addprefix ) instead of $(foreach ) x86/vdso: Simplify obj-y addition x86/vdso: Consolidate targets and clean-files x86/bugs: Rename CONFIG_RETHUNK => CONFIG_MITIGATION_RETHUNK x86/bugs: Rename CONFIG_CPU_SRSO => CONFIG_MITIGATION_SRSO x86/bugs: Rename CONFIG_CPU_IBRS_ENTRY => CONFIG_MITIGATION_IBRS_ENTRY x86/bugs: Rename CONFIG_CPU_UNRET_ENTRY => CONFIG_MITIGATION_UNRET_ENTRY x86/bugs: Rename CONFIG_SLS => CONFIG_MITIGATION_SLS ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/compiler-gcc.h2
-rw-r--r--include/linux/compiler.h2
-rw-r--r--include/linux/cpu.h2
-rw-r--r--include/linux/indirect_call_wrapper.h2
-rw-r--r--include/linux/module.h2
-rw-r--r--include/linux/objtool.h2
-rw-r--r--include/linux/pti.h2
-rw-r--r--include/linux/tick.h3
-rw-r--r--include/net/netfilter/nf_tables_core.h2
-rw-r--r--include/net/tc_wrapper.h2
10 files changed, 13 insertions, 8 deletions
diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h
index 75bd1692d2e3..aff92b1d284f 100644
--- a/include/linux/compiler-gcc.h
+++ b/include/linux/compiler-gcc.h
@@ -35,7 +35,7 @@
(typeof(ptr)) (__ptr + (off)); \
})
-#ifdef CONFIG_RETPOLINE
+#ifdef CONFIG_MITIGATION_RETPOLINE
#define __noretpoline __attribute__((__indirect_branch__("keep")))
#endif
diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index bb1339c7057b..cdcdaa48b4d2 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -209,7 +209,7 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val,
*/
#define ___ADDRESSABLE(sym, __attrs) \
static void * __used __attrs \
- __UNIQUE_ID(__PASTE(__addressable_,sym)) = (void *)&sym;
+ __UNIQUE_ID(__PASTE(__addressable_,sym)) = (void *)(uintptr_t)&sym;
#define __ADDRESSABLE(sym) \
___ADDRESSABLE(sym, __section(".discard.addressable"))
diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index 61a0ddf2bef6..9f616d1868d9 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -196,6 +196,8 @@ void arch_cpu_idle(void);
void arch_cpu_idle_prepare(void);
void arch_cpu_idle_enter(void);
void arch_cpu_idle_exit(void);
+void arch_tick_broadcast_enter(void);
+void arch_tick_broadcast_exit(void);
void __noreturn arch_cpu_idle_dead(void);
#ifdef CONFIG_ARCH_HAS_CPU_FINALIZE_INIT
diff --git a/include/linux/indirect_call_wrapper.h b/include/linux/indirect_call_wrapper.h
index adb83a42a6b9..35227d47cfc9 100644
--- a/include/linux/indirect_call_wrapper.h
+++ b/include/linux/indirect_call_wrapper.h
@@ -2,7 +2,7 @@
#ifndef _LINUX_INDIRECT_CALL_WRAPPER_H
#define _LINUX_INDIRECT_CALL_WRAPPER_H
-#ifdef CONFIG_RETPOLINE
+#ifdef CONFIG_MITIGATION_RETPOLINE
/*
* INDIRECT_CALL_$NR - wrapper for indirect calls with $NR known builtin
diff --git a/include/linux/module.h b/include/linux/module.h
index 96bc462872c0..1153b0d99a80 100644
--- a/include/linux/module.h
+++ b/include/linux/module.h
@@ -885,7 +885,7 @@ static inline void module_bug_finalize(const Elf_Ehdr *hdr,
static inline void module_bug_cleanup(struct module *mod) {}
#endif /* CONFIG_GENERIC_BUG */
-#ifdef CONFIG_RETPOLINE
+#ifdef CONFIG_MITIGATION_RETPOLINE
extern bool retpoline_module_ok(bool has_retpoline);
#else
static inline bool retpoline_module_ok(bool has_retpoline)
diff --git a/include/linux/objtool.h b/include/linux/objtool.h
index 33212e93f4a6..b3b8d3dab52d 100644
--- a/include/linux/objtool.h
+++ b/include/linux/objtool.h
@@ -131,7 +131,7 @@
*/
.macro VALIDATE_UNRET_BEGIN
#if defined(CONFIG_NOINSTR_VALIDATION) && \
- (defined(CONFIG_CPU_UNRET_ENTRY) || defined(CONFIG_CPU_SRSO))
+ (defined(CONFIG_MITIGATION_UNRET_ENTRY) || defined(CONFIG_MITIGATION_SRSO))
.Lhere_\@:
.pushsection .discard.validate_unret
.long .Lhere_\@ - .
diff --git a/include/linux/pti.h b/include/linux/pti.h
index 1a941efcaa62..1fbf9d6c20ef 100644
--- a/include/linux/pti.h
+++ b/include/linux/pti.h
@@ -2,7 +2,7 @@
#ifndef _INCLUDE_PTI_H
#define _INCLUDE_PTI_H
-#ifdef CONFIG_PAGE_TABLE_ISOLATION
+#ifdef CONFIG_MITIGATION_PAGE_TABLE_ISOLATION
#include <asm/pti.h>
#else
static inline void pti_init(void) { }
diff --git a/include/linux/tick.h b/include/linux/tick.h
index 70dc884054f6..4924a33700b7 100644
--- a/include/linux/tick.h
+++ b/include/linux/tick.h
@@ -12,6 +12,7 @@
#include <linux/cpumask.h>
#include <linux/sched.h>
#include <linux/rcupdate.h>
+#include <linux/static_key.h>
#ifdef CONFIG_GENERIC_CLOCKEVENTS
extern void __init tick_init(void);
@@ -69,6 +70,8 @@ enum tick_broadcast_state {
TICK_BROADCAST_ENTER,
};
+extern struct static_key_false arch_needs_tick_broadcast;
+
#ifdef CONFIG_GENERIC_CLOCKEVENTS_BROADCAST
extern void tick_broadcast_control(enum tick_broadcast_mode mode);
#else
diff --git a/include/net/netfilter/nf_tables_core.h b/include/net/netfilter/nf_tables_core.h
index 780a5f6ad4a6..ff27cb2e1662 100644
--- a/include/net/netfilter/nf_tables_core.h
+++ b/include/net/netfilter/nf_tables_core.h
@@ -93,7 +93,7 @@ extern const struct nft_set_type nft_set_bitmap_type;
extern const struct nft_set_type nft_set_pipapo_type;
extern const struct nft_set_type nft_set_pipapo_avx2_type;
-#ifdef CONFIG_RETPOLINE
+#ifdef CONFIG_MITIGATION_RETPOLINE
bool nft_rhash_lookup(const struct net *net, const struct nft_set *set,
const u32 *key, const struct nft_set_ext **ext);
bool nft_rbtree_lookup(const struct net *net, const struct nft_set *set,
diff --git a/include/net/tc_wrapper.h b/include/net/tc_wrapper.h
index a608546bcefc..ffe58a02537c 100644
--- a/include/net/tc_wrapper.h
+++ b/include/net/tc_wrapper.h
@@ -4,7 +4,7 @@
#include <net/pkt_cls.h>
-#if IS_ENABLED(CONFIG_RETPOLINE)
+#if IS_ENABLED(CONFIG_MITIGATION_RETPOLINE)
#include <linux/cpufeature.h>
#include <linux/static_key.h>