Commit b0fc8329 authored Nov 25, 2025 by Marc Zyngier Committed by Oliver Upton Dec 01, 2025

KVM: arm64: Add endian casting to kvm_swap_s[12]_desc()

Keep sparse quiet by explicitly casting endianness conversion
when swapping S1 and S2 descriptors.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202511260246.JQDGsQKa-lkp@intel.com/
Closes: https://lore.kernel.org/oe-kbuild-all/202511260344.9XehvH5Q-lkp@intel.com/

Fixes: c59ca4b5b0c3f ("KVM: arm64: Implement HW access flag management in stage-1 SW PTW")
Fixes: 39db933ba67f8 ("KVM: arm64: nv: Implement HW access flag management in stage-2 SW PTW")
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://msgid.link/20251125204848.1136383-1-maz@kernel.org

Signed-off-by: Oliver Upton <oupton@kernel.org>

parent 36fe022f

arch/arm64/kvm/at.c

+4 −4

Original line number	Diff line number	Diff line
		@@ -386,11 +386,11 @@ static int kvm_swap_s1_desc(struct kvm_vcpu *vcpu, u64 pa, u64 old, u64 new,
		struct s1_walk_info *wi)
		{
		if (wi->be) {
		old = cpu_to_be64(old);
		new = cpu_to_be64(new);
		old = (__force u64)cpu_to_be64(old);
		new = (__force u64)cpu_to_be64(new);
		} else {
		old = cpu_to_le64(old);
		new = cpu_to_le64(new);
		old = (__force u64)cpu_to_le64(old);
		new = (__force u64)cpu_to_le64(new);
		}

		return __kvm_at_swap_desc(vcpu->kvm, pa, old, new);

arch/arm64/kvm/nested.c

+4 −4

Original line number	Diff line number	Diff line
		@@ -224,11 +224,11 @@ static int swap_guest_s2_desc(struct kvm_vcpu *vcpu, phys_addr_t pa, u64 old, u6
		struct s2_walk_info *wi)
		{
		if (wi->be) {
		old = cpu_to_be64(old);
		new = cpu_to_be64(new);
		old = (__force u64)cpu_to_be64(old);
		new = (__force u64)cpu_to_be64(new);
		} else {
		old = cpu_to_le64(old);
		new = cpu_to_le64(new);
		old = (__force u64)cpu_to_le64(old);
		new = (__force u64)cpu_to_le64(new);
		}

		return __kvm_at_swap_desc(vcpu->kvm, pa, old, new);