linux-kernel - arch/riscv/kvm/vcpu_exit.c:139:34: sparse: sparse: cast to restricted _

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <202512141619.z9NzOFKH-lkp@intel.com>
Date: Sun, 14 Dec 2025 16:10:09 +0800
From: kernel test robot <lkp@...el.com>
To: Anup Patel <apatel@...tanamicro.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Atish Patra <atishp@...osinc.com>,
	Nutty Liu <liujingqi@...xincomputing.com>
Subject: arch/riscv/kvm/vcpu_exit.c:139:34: sparse: sparse: cast to
 restricted __le64

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8f0b4cce4481fb22653697cced8d0d04027cb1e8
commit: 77ba6469fe1ed37a1f62bc76fb5a7b159f698aed RISC-V: KVM: Use ncsr_xyz() in kvm_riscv_vcpu_trap_redirect()
date:   5 months ago
config: riscv-randconfig-r123-20251214 (https://download.01.org/0day-ci/archive/20251214/202512141619.z9NzOFKH-lkp@intel.com/config)
compiler: riscv64-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251214/202512141619.z9NzOFKH-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202512141619.z9NzOFKH-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> arch/riscv/kvm/vcpu_exit.c:139:34: sparse: sparse: cast to restricted __le64
   arch/riscv/kvm/vcpu_exit.c:155:9: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned long @@     got restricted __le64 [usertype] @@
   arch/riscv/kvm/vcpu_exit.c:155:9: sparse:     expected unsigned long
   arch/riscv/kvm/vcpu_exit.c:155:9: sparse:     got restricted __le64 [usertype]
   arch/riscv/kvm/vcpu_exit.c:158:9: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned long @@     got restricted __le64 [usertype] @@
   arch/riscv/kvm/vcpu_exit.c:158:9: sparse:     expected unsigned long
   arch/riscv/kvm/vcpu_exit.c:158:9: sparse:     got restricted __le64 [usertype]
   arch/riscv/kvm/vcpu_exit.c:159:9: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned long @@     got restricted __le64 [usertype] @@
   arch/riscv/kvm/vcpu_exit.c:159:9: sparse:     expected unsigned long
   arch/riscv/kvm/vcpu_exit.c:159:9: sparse:     got restricted __le64 [usertype]
   arch/riscv/kvm/vcpu_exit.c:160:9: sparse: sparse: incorrect type in assignment (different base types) @@     expected unsigned long @@     got restricted __le64 [usertype] @@
   arch/riscv/kvm/vcpu_exit.c:160:9: sparse:     expected unsigned long
   arch/riscv/kvm/vcpu_exit.c:160:9: sparse:     got restricted __le64 [usertype]
   arch/riscv/kvm/vcpu_exit.c:163:41: sparse: sparse: cast to restricted __le64

vim +139 arch/riscv/kvm/vcpu_exit.c

   129	
   130	/**
   131	 * kvm_riscv_vcpu_trap_redirect -- Redirect trap to Guest
   132	 *
   133	 * @vcpu: The VCPU pointer
   134	 * @trap: Trap details
   135	 */
   136	void kvm_riscv_vcpu_trap_redirect(struct kvm_vcpu *vcpu,
   137					  struct kvm_cpu_trap *trap)
   138	{
 > 139		unsigned long vsstatus = ncsr_read(CSR_VSSTATUS);
   140	
   141		/* Change Guest SSTATUS.SPP bit */
   142		vsstatus &= ~SR_SPP;
   143		if (vcpu->arch.guest_context.sstatus & SR_SPP)
   144			vsstatus |= SR_SPP;
   145	
   146		/* Change Guest SSTATUS.SPIE bit */
   147		vsstatus &= ~SR_SPIE;
   148		if (vsstatus & SR_SIE)
   149			vsstatus |= SR_SPIE;
   150	
   151		/* Clear Guest SSTATUS.SIE bit */
   152		vsstatus &= ~SR_SIE;
   153	
   154		/* Update Guest SSTATUS */
   155		ncsr_write(CSR_VSSTATUS, vsstatus);
   156	
   157		/* Update Guest SCAUSE, STVAL, and SEPC */
   158		ncsr_write(CSR_VSCAUSE, trap->scause);
   159		ncsr_write(CSR_VSTVAL, trap->stval);
   160		ncsr_write(CSR_VSEPC, trap->sepc);
   161	
   162		/* Set Guest PC to Guest exception vector */
   163		vcpu->arch.guest_context.sepc = ncsr_read(CSR_VSTVEC);
   164	
   165		/* Set Guest privilege mode to supervisor */
   166		vcpu->arch.guest_context.sstatus |= SR_SPP;
   167	}
   168	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki