On RISC-V, there's no possibility to parameterise IPIs resp. enrich them
with some userdata. Great. We need to do it in software...
We differentiate between two IPI types in software: IPI_CAUSE_MGMT, and
IPI_CAUSE_GUEST.
When a guest sends an IPI to a HART within the cell, the HV will trap,
and we forward the IPI call to the SBI. Before, we set the cause to
IPI_CAUSE_GUEST.
Follow the same logic for management IPIs accordingly.
Signed-off-by: Ralf Ramsauer <ralf.ramsa...@oth-regensburg.de>
---
hypervisor/arch/riscv/control.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/hypervisor/arch/riscv/control.c b/hypervisor/arch/riscv/control.c
index b848994b..263708a7 100644
--- a/hypervisor/arch/riscv/control.c
+++ b/hypervisor/arch/riscv/control.c
@@ -11,6 +11,8 @@
*/
#include <jailhouse/control.h>
+#include <jailhouse/printk.h>
+#include <asm/sbi.h>
int arch_cell_create(struct cell *cell)
{
@@ -68,4 +70,16 @@ void arch_park_cpu(unsigned int cpu_id)
void arch_send_event(struct public_per_cpu *target_data)
{
+ struct sbiret result;
+
+ target_data->ipi_cause = IPI_CAUSE_MGMT;
+ memory_barrier();
+
+ result = sbi_send_ipi(1UL << (target_data->phys_id % BITS_PER_LONG),
+ target_data->phys_id / BITS_PER_LONG);
+ if (result.error != SBI_SUCCESS) {
+ printk("IPI send to HART %lu failed: %ld\n",
+ target_data->phys_id, result.error);
+ panic_stop();
+ }
}
--
2.36.1
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