From: Joey Gouly <joey.gouly@arm.com>
Forward RSI_HOST_CALLS to KVM's HVC handler.
Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
---
Changes since v7:
* Avoid turning a negative return from kvm_smccc_call_handler() into a
error response to the guest. Instead propogate the error back to user
space.
Changes since v4:
* Setting GPRS is now done by kvm_rec_enter() rather than
rec_exit_host_call() (see previous patch - arm64: RME: Handle realm
enter/exit). This fixes a bug where the registers set by user space
were being ignored.
---
arch/arm64/kvm/rme-exit.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/arch/arm64/kvm/rme-exit.c b/arch/arm64/kvm/rme-exit.c
index 6830dc080610..f1443b58c1c4 100644
--- a/arch/arm64/kvm/rme-exit.c
+++ b/arch/arm64/kvm/rme-exit.c
@@ -114,6 +114,19 @@ static int rec_exit_ripas_change(struct kvm_vcpu *vcpu)
return -EFAULT;
}
+static int rec_exit_host_call(struct kvm_vcpu *vcpu)
+{
+ int i;
+ struct realm_rec *rec = &vcpu->arch.rec;
+
+ vcpu->stat.hvc_exit_stat++;
+
+ for (i = 0; i < REC_RUN_GPRS; i++)
+ vcpu_set_reg(vcpu, i, rec->run->exit.gprs[i]);
+
+ return kvm_smccc_call_handler(vcpu);
+}
+
static void update_arch_timer_irq_lines(struct kvm_vcpu *vcpu)
{
struct realm_rec *rec = &vcpu->arch.rec;
@@ -175,6 +188,8 @@ int handle_rec_exit(struct kvm_vcpu *vcpu, int rec_run_ret)
return rec_exit_psci(vcpu);
case RMI_EXIT_RIPAS_CHANGE:
return rec_exit_ripas_change(vcpu);
+ case RMI_EXIT_HOST_CALL:
+ return rec_exit_host_call(vcpu);
}
kvm_pr_unimpl("Unsupported exit reason: %u\n",
--
2.43.0