[tip:x86/sev 9/11] arch/x86/boot/compressed/misc.c:397 early_sev_detect() warn: bitwise AND condition is false here

[tip:x86/sev 9/11] arch/x86/boot/compressed/misc.c:397 early_sev_detect() warn: bitwise AND condition is false here

[kernel test robot]

BCC: lkp@intel.com
CC: oe-kbuild-all@lists.linux.dev
CC: linux-kernel@vger.kernel.org
CC: x86@kernel.org
TO: Ashish Kalra <ashish.kalra@amd.com>
CC: "Borislav Petkov (AMD)" <bp@alien8.de>
CC: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
CC: Tom Lendacky <thomas.lendacky@amd.com>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/sev
head:   3074152e56c9b0f9b9c67edfbc08b371db050b6d
commit: f30470c190c2f4776e0baeba1f53fd8dd3820394 [9/11] x86/boot: Skip video memory access in the decompressor for SEV-ES/SNP
:::::: branch date: 3 days ago
:::::: commit date: 3 days ago
config: i386-randconfig-141-20241030 (https://download.01.org/0day-ci/archive/20241031/202410311441.nu6INxRH-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0

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>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Closes: https://lore.kernel.org/r/202410311441.nu6INxRH-lkp@intel.com/

New smatch warnings:
arch/x86/boot/compressed/misc.c:397 early_sev_detect() warn: bitwise AND condition is false here

Old smatch warnings:
arch/x86/boot/compressed/../../../../lib/zstd/decompress/huf_decompress.c:598 HUF_decompress4X1_usingDTable_internal_body() warn: maybe use && instead of &
arch/x86/boot/compressed/../../../../lib/zstd/decompress/huf_decompress.c:598 HUF_decompress4X1_usingDTable_internal_body() warn: maybe use && instead of &
arch/x86/boot/compressed/../../../../lib/zstd/decompress/huf_decompress.c:1292 HUF_decompress4X2_usingDTable_internal_body() warn: maybe use && instead of &
arch/x86/boot/compressed/../../../../lib/zstd/decompress/huf_decompress.c:1292 HUF_decompress4X2_usingDTable_internal_body() warn: maybe use && instead of &
arch/x86/boot/compressed/../../../../lib/zstd/decompress/zstd_decompress_internal.h:206 ZSTD_DCtx_get_bmi2() warn: inconsistent indenting
arch/x86/boot/compressed/../../../../lib/zstd/decompress/zstd_decompress_block.c:894 ZSTD_execSequenceEnd() warn: inconsistent indenting
arch/x86/boot/compressed/../../../../lib/zstd/decompress/zstd_decompress_block.c:942 ZSTD_execSequenceEndSplitLitBuffer() warn: inconsistent indenting
arch/x86/boot/compressed/../../../../lib/zstd/decompress/zstd_decompress_block.c:1009 ZSTD_execSequence() warn: inconsistent indenting

vim +397 arch/x86/boot/compressed/misc.c

cd0d9d92c8bb46 Ard Biesheuvel 2024-02-27  387  
f30470c190c2f4 Ashish Kalra   2024-08-01  388  static void early_sev_detect(void)
f30470c190c2f4 Ashish Kalra   2024-08-01  389  {
f30470c190c2f4 Ashish Kalra   2024-08-01  390  	/*
f30470c190c2f4 Ashish Kalra   2024-08-01  391  	 * Accessing video memory causes guest termination because
f30470c190c2f4 Ashish Kalra   2024-08-01  392  	 * the boot stage2 #VC handler of SEV-ES/SNP guests does not
f30470c190c2f4 Ashish Kalra   2024-08-01  393  	 * support MMIO handling and kexec -c adds screen_info to the
f30470c190c2f4 Ashish Kalra   2024-08-01  394  	 * boot parameters passed to the kexec kernel, which causes
f30470c190c2f4 Ashish Kalra   2024-08-01  395  	 * console output to be dumped to both video and serial.
f30470c190c2f4 Ashish Kalra   2024-08-01  396  	 */
f30470c190c2f4 Ashish Kalra   2024-08-01 @397  	if (sev_status & MSR_AMD64_SEV_ES_ENABLED)
f30470c190c2f4 Ashish Kalra   2024-08-01  398  		lines = cols = 0;
f30470c190c2f4 Ashish Kalra   2024-08-01  399  }
f30470c190c2f4 Ashish Kalra   2024-08-01  400  

-- 
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