[stefandoesinger-zx297520:dlink 23/142] arch/arm/kernel/head.S:129:2: error: invalid instruction, any one of the following would fix this:

[kernel test robot <lkp@intel.com>]

tree:   https://gitlab.com/stefandoesinger/zx297520-kernel dlink
head:   7998b6e929bb20ed66acafa33720d8e3533e1598
commit: 43b934983d6f2811702f80419b92a1c62988fb7e [23/142] ARM: zte: HACK: Set up GICv3.
config: arm-spear3xx_defconfig (https://download.01.org/0day-ci/archive/20261009/202610090931.MTCqZgr1-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 242243a5814307de825db3428662d67b064e2cbc)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261009/202610090931.MTCqZgr1-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202610090931.MTCqZgr1-lkp@intel.com/

All errors (new ones prefixed by >>):

>> arch/arm/kernel/head.S:129:2: error: invalid instruction, any one of the following would fix this:
    mov r3, #0x131 @ non-secure
    ^
   arch/arm/kernel/head.S:129:11: note: invalid operand for instruction
    mov r3, #0x131 @ non-secure
             ^
   arch/arm/kernel/head.S:129:11: note: operand must be a register in range [r0, r15]
    mov r3, #0x131 @ non-secure
             ^
   arch/arm/kernel/head.S:129:2: note: instruction requires: armv6t2
    mov r3, #0x131 @ non-secure
    ^


vim +129 arch/arm/kernel/head.S

   105	
   106		@ FIXME: This needs to go into the bootloader, it has no business being here.
   107		@ zx297520v3 has essentially an ARMv8 CPU with a GICv3 and secure mode support, but there's
   108		@ no ARM TrustZone firmware. So we have to set up the CPU and GIC according to arm64 boot
   109		@ requirements specified in Documentation/arch/arm64/booting.rst.
   110		@ Leave r0, r1 and r2 alone to preserve the DTB pointer.
   111	
   112		@ This allows EL1 to handle ints hat are normally handled by EL2/3.
   113		@ Detect sane bootloaders and skip the hack
   114		ldr	r3, =0xf2000000
   115		ldr	r3, [r3]
   116		ldr	r4, =(GICD_CTLR_ARE_NS | GICD_CTLR_DS)
   117		cmp	r3, r4
   118		beq	skip_zx_hack
   119		ldr	r3, =0xf2000000
   120		str	r4, [r3]
   121	
   122		cps	#MON_MODE
   123	
   124		@ Work in non-secure physical addres space: SCR_EL3.NS = 1. At least the UART seems to
   125		@ respond only to non-secure addresses. I have taken insipiration from Raspberry pi's
   126		@ armstub7.S here.
   127		@
   128		@ ARM docs say modify this bit in monitor mode only...
 > 129		mov	r3, #0x131			@ non-secure
   130		mcr	p15, 0, r3, c1, c1, 0
   131	
   132		@ AP_PPI_MODE_REG: Configure timer PPIs (10, 11, 13, 14) to active-low.
   133		ldr	r3, =0xF22020a8
   134		ldr	r4, =0x50
   135		str	r4, [r3]
   136		ldr	r3, =0xF22020ac
   137		ldr	r4, =0x14
   138		str	r4, [r3]
   139	
   140		@ Enable EL access to ICC_SRE (bit 3, ICC_SRE_EL3.Enable). Enable system reg access to
   141		@ GICv3 registers (bit 0, ICC_SRE_EL3.SRE).
   142		mrc	p15, 6, r3, c12, c12, 5		@ ICC_SRE_EL3
   143		orr	r3, #0x9			@ FIXME: No defines for SRE_EL3 values?
   144		mcr	p15, 6, r3, c12, c12, 5
   145		mrc	p15, 0, r3, c12, c12, 5		@ ICC_SRE_EL1
   146		orr	r3, #(ICC_SRE_EL1_SRE)
   147		mcr	p15, 0, r3, c12, c12, 5
   148	
   149		@ Like ICC_SRE_EL3, enable non-secure access and allow register based access.
   150		mrc	p15, 4, r3, c12, c9, 5		@ ICC_SRE_EL2 aka ICC_HSRE
   151		orr	r3, r3, #(ICC_SRE_EL2_ENABLE | ICC_SRE_EL2_SRE)
   152		mcr	p15, 4, r3, c12, c9, 5
   153		isb
   154	
   155		@ Back to SVC mode. TODO: Doesn't safe_svcmode_maskall do this for us anyway?
   156		cps	#SVC_MODE
   157	skip_zx_hack:
   158	
   159		@ ensure svc mode and all interrupts masked
   160		safe_svcmode_maskall r9
   161	
   162		mrc	p15, 0, r9, c0, c0		@ get processor id
   163		bl	__lookup_processor_type		@ r5=procinfo r9=cpuid
   164		movs	r10, r5				@ invalid processor (r5=0)?
   165	 THUMB( it	eq )		@ force fixup-able long branch encoding
   166		beq	__error_p			@ yes, error 'p'
   167	

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