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ARM development for 6.18-rc1 

ARM Development changes for 6.18-rc1:
 - Use string choices helpers
 - Add support for HAVE_FUNCTION_GRAPH_FREGS
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rmk/linux

Pull ARM development updates from Russell King:

 - Use string choices helpers

 - Add support for HAVE_FUNCTION_GRAPH_FREGS

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rmk/linux:
  ARM: 9457/1: ftrace: Implement HAVE_FUNCTION_GRAPH_FREGS
  ARM: 9456/1: mm: fault: use string choices helper
  ARM: 9454/1: kernel: bios32: use string choices helper
  ARM: 9451/1: mm: l2x0: use string choices helper
This commit is contained in:
Linus Torvalds 2025-10-07 16:20:19 -07:00
parent a8cdf51cda 9aa791c8d7
commit 0d97f2067c
5 changed files with 23 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/Kconfig
View File

@ -108,6 +108,7 @@ config ARM
select HAVE_GUP_FAST if ARM_LPAE
select HAVE_FUNCTION_ERROR_INJECTION
select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_FUNCTION_GRAPH_FREGS
select HAVE_FUNCTION_TRACER if !XIP_KERNEL
select HAVE_GCC_PLUGINS
select HAVE_HW_BREAKPOINT if PERF_EVENTS && (CPU_V6 || CPU_V6K || CPU_V7)

5
arch/arm/kernel/bios32.c
View File

@ -10,6 +10,7 @@
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/string_choices.h>
#include <linux/init.h>
#include <linux/io.h>
@ -337,8 +338,8 @@ void pcibios_fixup_bus(struct pci_bus *bus)
/*
* Report what we did for this bus
*/
pr_info("PCI: bus%d: Fast back to back transfers %sabled\n",
bus->number, (features & PCI_COMMAND_FAST_BACK) ? "en" : "dis");
pr_info("PCI: bus%d: Fast back to back transfers %s\n",
bus->number, str_enabled_disabled(features & PCI_COMMAND_FAST_BACK));
}
EXPORT_SYMBOL(pcibios_fixup_bus);

18
arch/arm/kernel/entry-ftrace.S
View File

@ -257,11 +257,21 @@ ENDPROC(ftrace_graph_regs_caller)
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
ENTRY(return_to_handler)
stmdb sp!, {r0-r3}
add r0, sp, #16 @ sp at exit of instrumented routine
mov ip, sp @ sp at exit of instrumented routine
sub sp, #PT_REGS_SIZE
str r0, [sp, #S_R0]
str r1, [sp, #S_R1]
str r2, [sp, #S_R2]
str r3, [sp, #S_R3]
str ip, [sp, #S_FP]
mov r0, sp
bl ftrace_return_to_handler
mov lr, r0 @ r0 has real ret addr
ldmia sp!, {r0-r3}
mov lr, r0 @ r0 has real ret addr
ldr r3, [sp, #S_R3]
ldr r2, [sp, #S_R2]
ldr r1, [sp, #S_R1]
ldr r0, [sp, #S_R0]
add sp, sp, #PT_REGS_SIZE @ restore stack pointer
ret lr
ENDPROC(return_to_handler)
#endif

7
arch/arm/mm/cache-l2x0.c
View File

@ -13,6 +13,7 @@
#include <linux/io.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/string_choices.h>
#include <asm/cacheflush.h>
#include <asm/cp15.h>
@ -667,9 +668,9 @@ static void __init l2c310_enable(void __iomem *base, unsigned num_lock)
u32 power_ctrl;
power_ctrl = readl_relaxed(base + L310_POWER_CTRL);
pr_info("L2C-310 dynamic clock gating %sabled, standby mode %sabled\n",
power_ctrl & L310_DYNAMIC_CLK_GATING_EN ? "en" : "dis",
power_ctrl & L310_STNDBY_MODE_EN ? "en" : "dis");
pr_info("L2C-310 dynamic clock gating %s, standby mode %s\n",
str_enabled_disabled(power_ctrl & L310_DYNAMIC_CLK_GATING_EN),
str_enabled_disabled(power_ctrl & L310_STNDBY_MODE_EN));
}
if (aux & L310_AUX_CTRL_FULL_LINE_ZERO)

3
arch/arm/mm/fault.c
View File

@ -135,8 +135,7 @@ static void die_kernel_fault(const char *msg, struct mm_struct *mm,
bust_spinlocks(1);
pr_alert("8<--- cut here ---\n");
pr_alert("Unable to handle kernel %s at virtual address %08lx when %s\n",
msg, addr, fsr & FSR_LNX_PF ? "execute" :
fsr & FSR_WRITE ? "write" : "read");
msg, addr, fsr & FSR_LNX_PF ? "execute" : str_write_read(fsr & FSR_WRITE));
show_pte(KERN_ALERT, mm, addr);
die("Oops", regs, fsr);