[PATCH 1/3] KVM: arm64: timers: Fix percpu address space issues in kvm_timer_hyp_init()

Uros Bizjak
2024-12-13T14:58:22Z

Cast return value from kvm_get_running_vcpus() in the __percpu
address space to the generic address space via uintptr_t [1]
to fix a couple of:

arch_timer.c:1395:66: warning: incorrect type in argument 2 (different address spaces)
arch_timer.c:1395:66: expected void *vcpu_info
arch_timer.c:1395:66: got struct kvm_vcpu *[noderef] __percpu *

sparse warnings.

There were no changes in the resulting object files.

[1] https://sparse.docs.kernel.org/en/latest/annotations.html#address-space-name

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Oliver Upton <oliver.upton@linux.dev>
Cc: Joey Gouly <joey.gouly@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Zenghui Yu <yuzenghui@huawei.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
---
arch/arm64/kvm/arch_timer.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/kvm/arch_timer.c b/arch/arm64/kvm/arch_timer.c
index 1215df590418..a13bb9e8dc19 100644
--- a/arch/arm64/kvm/arch_timer.c
+++ b/arch/arm64/kvm/arch_timer.c
@@ -1392,7 +1392,7 @@ int __init kvm_timer_hyp_init(bool has_gic)

if (has_gic) {
err = irq_set_vcpu_affinity(host_vtimer_irq,
- kvm_get_running_vcpus());
+ (void *)(uintptr_t)kvm_get_running_vcpus());
if (err) {
kvm_err("kvm_arch_timer: error setting vcpu affinity\n");
goto out_free_vtimer_irq;
@@ -1416,7 +1416,7 @@ int __init kvm_timer_hyp_init(bool has_gic)

if (has_gic) {
err = irq_set_vcpu_affinity(host_ptimer_irq,
- kvm_get_running_vcpus());
+ (void *)(uintptr_t)kvm_get_running_vcpus());
if (err) {
kvm_err("kvm_arch_timer: error setting vcpu affinity\n");
goto out_free_ptimer_irq;
--
2.42.0