Commit 915ee0da authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 

Pull x86 fixes from Thomas Gleixner:
 "A pile of x86 updates:

   - Prevent exceeding he valid physical address space in the /dev/mem
     limit checks.

   - Move all header content inside the header guard to prevent compile
     failures.

   - Fix the bogus __percpu annotation in this_cpu_has() which makes
     sparse very noisy.

   - Disable switch jump tables completely when retpolines are enabled.

   - Prevent leaking the trampoline address"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/realmode: Make set_real_mode_mem() static inline
  x86/cpufeature: Fix __percpu annotation in this_cpu_has()
  x86/mm: Don't exceed the valid physical address space
  x86/retpolines: Disable switch jump tables when retpolines are enabled
  x86/realmode: Don't leak the trampoline kernel address
  x86/boot: Fix incorrect ifdeffery scope
  x86/resctrl: Remove unused variable
parents 590627f7 f560bd19

arch/x86/Makefile

+6 −2
Original line number Diff line number Diff line
@@ -219,8 +219,12 @@ ifdef CONFIG_RETPOLINE 
  # Additionally, avoid generating expensive indirect jumps which

  # are subject to retpolines for small number of switch cases.

  # clang turns off jump table generation by default when under

  # retpoline builds, however, gcc does not for x86.

  KBUILD_CFLAGS += $(call cc-option,--param=case-values-threshold=20)

  # retpoline builds, however, gcc does not for x86. This has

  # only been fixed starting from gcc stable version 8.4.0 and

  # onwards, but not for older ones. See gcc bug #86952.

  ifndef CONFIG_CC_IS_CLANG

    KBUILD_CFLAGS += $(call cc-option,-fno-jump-tables)

  endif

endif



archscripts: scripts_basic

arch/x86/boot/compressed/misc.h

+2 −2
Original line number Diff line number Diff line
@@ -120,8 +120,6 @@ static inline void console_init(void) 


void set_sev_encryption_mask(void);



#endif



/* acpi.c */

#ifdef CONFIG_ACPI

acpi_physical_address get_rsdp_addr(void);
@@ -135,3 +133,5 @@ int count_immovable_mem_regions(void); 
#else

static inline int count_immovable_mem_regions(void) { return 0; }

#endif



#endif /* BOOT_COMPRESSED_MISC_H */

arch/x86/include/asm/cpufeature.h

+3 −2
Original line number Diff line number Diff line
@@ -113,7 +113,8 @@ extern const char * const x86_bug_flags[NBUGINTS*32]; 


#define this_cpu_has(bit)						\

	(__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 :	\

	 x86_this_cpu_test_bit(bit, (unsigned long *)&cpu_info.x86_capability))

	 x86_this_cpu_test_bit(bit,					\

		(unsigned long __percpu *)&cpu_info.x86_capability))



/*

 * This macro is for detection of features which need kernel

arch/x86/include/asm/realmode.h

+5 −1
Original line number Diff line number Diff line
@@ -77,7 +77,11 @@ static inline size_t real_mode_size_needed(void) 
	return ALIGN(real_mode_blob_end - real_mode_blob, PAGE_SIZE);

}



void set_real_mode_mem(phys_addr_t mem, size_t size);

static inline void set_real_mode_mem(phys_addr_t mem)

{

	real_mode_header = (struct real_mode_header *) __va(mem);

}



void reserve_real_mode(void);



#endif /* __ASSEMBLY__ */

arch/x86/kernel/cpu/resctrl/monitor.c

+0 −3
Original line number Diff line number Diff line
@@ -501,11 +501,8 @@ out_unlock: 
void cqm_setup_limbo_handler(struct rdt_domain *dom, unsigned long delay_ms)

{

	unsigned long delay = msecs_to_jiffies(delay_ms);

	struct rdt_resource *r;

	int cpu;



	r = &rdt_resources_all[RDT_RESOURCE_L3];



	cpu = cpumask_any(&dom->cpu_mask);

	dom->cqm_work_cpu = cpu;

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