Commit acfcaf90 authored by Oliver Upton's avatar Oliver Upton
Browse files

smccc: kvm_guest: Align with DISCOVER_IMPL_CPUS ABI 



The ABI of the hypercall requires that R2 and R3 are 0. Explicitly pass
0 for these parameters.

Cc: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Fixes: 86edf6bd ("smccc/kvm_guest: Enable errata based on implementation CPUs")
Reviewed-by: default avatarShameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Link: https://lore.kernel.org/r/20250327163613.2516073-1-oliver.upton@linux.dev


Signed-off-by: default avatarOliver Upton <oliver.upton@linux.dev>
parent 369c0122

drivers/firmware/smccc/kvm_guest.c

+1 −1
Original line number Diff line number Diff line
@@ -95,7 +95,7 @@ void __init kvm_arm_target_impl_cpu_init(void) 


	for (i = 0; i < max_cpus; i++) {

		arm_smccc_1_1_invoke(ARM_SMCCC_VENDOR_HYP_KVM_DISCOVER_IMPL_CPUS_FUNC_ID,

				     i, &res);

				     i, 0, 0, &res);

		if (res.a0 != SMCCC_RET_SUCCESS) {

			pr_warn("Discovering target implementation CPUs failed\n");

			goto mem_free;