linux-kernel - drivers/iommu/io-pgtable-arm.c:330: Error: unrecognized opcode `lr.d s6,0(s1)'

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Date:   Mon, 26 Dec 2022 04:43:19 +0800
From:   kernel test robot <lkp@...el.com>
To:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Conor Dooley <conor.dooley@...rochip.com>,
        Guo Ren <guoren@...nel.org>
Subject: drivers/iommu/io-pgtable-arm.c:330: Error: unrecognized opcode `lr.d
 s6,0(s1)'

Hi Lad,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   72a85e2b0a1e1e6fb4ee51ae902730212b2de25c
commit: 8292493c22c8e28b6e67a01e0f5c6db1cf231eb1 riscv: Kconfig.socs: Add ARCH_RENESAS kconfig option
date:   6 weeks ago
config: riscv-randconfig-r016-20221226
compiler: riscv32-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8292493c22c8e28b6e67a01e0f5c6db1cf231eb1
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 8292493c22c8e28b6e67a01e0f5c6db1cf231eb1
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=riscv olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash drivers/iommu/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   drivers/iommu/io-pgtable-arm.c: Assembler messages:
>> drivers/iommu/io-pgtable-arm.c:330: Error: unrecognized opcode `lr.d s6,0(s1)'
>> drivers/iommu/io-pgtable-arm.c:332: Error: unrecognized opcode `sc.d.rl a5,s4,0(s1)'

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for IOMMU_IO_PGTABLE_LPAE
   Depends on [n]: IOMMU_SUPPORT [=y] && (ARM || ARM64 || COMPILE_TEST [=y] && !GENERIC_ATOMIC64 [=y])
   Selected by [y]:
   - IPMMU_VMSA [=y] && IOMMU_SUPPORT [=y] && (ARCH_RENESAS [=y] || COMPILE_TEST [=y] && !GENERIC_ATOMIC64 [=y])


vim +330 drivers/iommu/io-pgtable-arm.c

c896c132b01895 Laurent Pinchart   2014-12-14  310  
fb3a95795da53d Robin Murphy       2017-06-22  311  static arm_lpae_iopte arm_lpae_install_table(arm_lpae_iopte *table,
fb3a95795da53d Robin Murphy       2017-06-22  312  					     arm_lpae_iopte *ptep,
2c3d273eabe8b1 Robin Murphy       2017-06-22  313  					     arm_lpae_iopte curr,
9abe2ac834851a Hector Martin      2021-11-20  314  					     struct arm_lpae_io_pgtable *data)
fb3a95795da53d Robin Murphy       2017-06-22  315  {
2c3d273eabe8b1 Robin Murphy       2017-06-22  316  	arm_lpae_iopte old, new;
9abe2ac834851a Hector Martin      2021-11-20  317  	struct io_pgtable_cfg *cfg = &data->iop.cfg;
e1d3c0fd701df8 Will Deacon        2014-11-14  318  
9abe2ac834851a Hector Martin      2021-11-20  319  	new = paddr_to_iopte(__pa(table), data) | ARM_LPAE_PTE_TYPE_TABLE;
fb3a95795da53d Robin Murphy       2017-06-22  320  	if (cfg->quirks & IO_PGTABLE_QUIRK_ARM_NS)
fb3a95795da53d Robin Murphy       2017-06-22  321  		new |= ARM_LPAE_PTE_NSTABLE;
e1d3c0fd701df8 Will Deacon        2014-11-14  322  
77f3445866c39d Will Deacon        2017-06-23  323  	/*
77f3445866c39d Will Deacon        2017-06-23  324  	 * Ensure the table itself is visible before its PTE can be.
77f3445866c39d Will Deacon        2017-06-23  325  	 * Whilst we could get away with cmpxchg64_release below, this
77f3445866c39d Will Deacon        2017-06-23  326  	 * doesn't have any ordering semantics when !CONFIG_SMP.
77f3445866c39d Will Deacon        2017-06-23  327  	 */
77f3445866c39d Will Deacon        2017-06-23  328  	dma_wmb();
2c3d273eabe8b1 Robin Murphy       2017-06-22  329  
2c3d273eabe8b1 Robin Murphy       2017-06-22 @330  	old = cmpxchg64_relaxed(ptep, curr, new);
2c3d273eabe8b1 Robin Murphy       2017-06-22  331  
4f41845b340783 Will Deacon        2019-06-25 @332  	if (cfg->coherent_walk || (old & ARM_LPAE_PTE_SW_SYNC))
2c3d273eabe8b1 Robin Murphy       2017-06-22  333  		return old;
2c3d273eabe8b1 Robin Murphy       2017-06-22  334  
2c3d273eabe8b1 Robin Murphy       2017-06-22  335  	/* Even if it's not ours, there's no point waiting; just kick it */
41e1eb2546e9c8 Isaac J. Manjarres 2021-06-16  336  	__arm_lpae_sync_pte(ptep, 1, cfg);
2c3d273eabe8b1 Robin Murphy       2017-06-22  337  	if (old == curr)
2c3d273eabe8b1 Robin Murphy       2017-06-22  338  		WRITE_ONCE(*ptep, new | ARM_LPAE_PTE_SW_SYNC);
2c3d273eabe8b1 Robin Murphy       2017-06-22  339  
2c3d273eabe8b1 Robin Murphy       2017-06-22  340  	return old;
e1d3c0fd701df8 Will Deacon        2014-11-14  341  }
e1d3c0fd701df8 Will Deacon        2014-11-14  342  

:::::: The code at line 330 was first introduced by commit
:::::: 2c3d273eabe8b1ed3b3cffe2c79643b1bf7e2d4a iommu/io-pgtable-arm: Support lockless operation

:::::: TO: Robin Murphy <robin.murphy@....com>
:::::: CC: Will Deacon <will.deacon@....com>

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

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