[PATCH] hw/riscv/virt-acpi-build.c: Use kvm timer frequency when kvm enabled

["Yicong Yang" <yang.yicong@picoheart.com>]

The timer frequency is decided by the host(kvm) rather than a fixed
RISCV_ACLINT_DEFAULT_TIMEBASE_FREQ on kvm accelerated VM. So build
RCHT with KVM provided timer frequency if KVM is enabled, just like
how we build the timer node on DT based VM.

Fixes: ebfd39289370 ("hw/riscv/virt: virt-acpi-build.c: Add RHCT Table")
Signed-off-by: Yicong Yang <yang.yicong@picoheart.com>
---
 hw/riscv/virt-acpi-build.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/hw/riscv/virt-acpi-build.c b/hw/riscv/virt-acpi-build.c
index f1406cb68339..fd6ca5dbc4ff 100644
--- a/hw/riscv/virt-acpi-build.c
+++ b/hw/riscv/virt-acpi-build.c
@@ -35,9 +35,11 @@
 #include "hw/riscv/virt.h"
 #include "hw/riscv/numa.h"
 #include "hw/virtio/virtio-acpi.h"
+#include "kvm/kvm_riscv.h"
 #include "migration/vmstate.h"
 #include "qapi/error.h"
 #include "qemu/error-report.h"
+#include "system/kvm.h"
 #include "system/reset.h"
 
 #define ACPI_BUILD_TABLE_SIZE             0x20000
@@ -296,7 +298,10 @@ static void build_rhct(GArray *table_data,
 
     /* Time Base Frequency */
     build_append_int_noprefix(table_data,
-                              RISCV_ACLINT_DEFAULT_TIMEBASE_FREQ, 8);
+                              kvm_enabled() ?
+                              kvm_riscv_get_timebase_frequency(&s->soc->harts[0]) :
+                              RISCV_ACLINT_DEFAULT_TIMEBASE_FREQ,
+                              8);
 
     /* ISA + N hart info */
     num_rhct_nodes = 1 + ms->smp.cpus;
-- 
2.34.1