Implement kvm hardware enable, disable interface, setting the
guest config register to enable virtualization features when called
the interface.
Reviewed-by: Bibo Mao <maobibo@xxxxxxxxxxx>
Tested-by: Huacai Chen <chenhuacai@xxxxxxxxxxx>
Signed-off-by: Tianrui Zhao <zhaotianrui@xxxxxxxxxxx>
---
arch/loongarch/kvm/main.c | 62 +++++++++++++++++++++++++++++++++++++++
1 file changed, 62 insertions(+)
diff --git a/arch/loongarch/kvm/main.c b/arch/loongarch/kvm/main.c
index 267c0505ea..1c1d519950 100644
--- a/arch/loongarch/kvm/main.c
+++ b/arch/loongarch/kvm/main.c
@@ -249,6 +249,68 @@ void kvm_check_vpid(struct kvm_vcpu *vcpu)
change_csr_gstat(vpid_mask << CSR_GSTAT_GID_SHIFT, vpid);
}
+void kvm_init_vmcs(struct kvm *kvm)
+{
+ kvm->arch.vmcs = vmcs;
+}
+
+long kvm_arch_dev_ioctl(struct file *filp,
+ unsigned int ioctl, unsigned long arg)
+{
+ return -ENOIOCTLCMD;
+}
+
+int kvm_arch_hardware_enable(void)
+{
+ unsigned long env, gcfg = 0;
+
+ env = read_csr_gcfg();
+
+ /* First init gcfg, gstat, gintc, gtlbc. All guest use the same config */
+ write_csr_gcfg(0);
+ write_csr_gstat(0);
+ write_csr_gintc(0);
+ clear_csr_gtlbc(CSR_GTLBC_USETGID | CSR_GTLBC_TOTI);
+
+ /*
+ * Enable virtualization features granting guest direct control of
+ * certain features:
+ * GCI=2: Trap on init or unimplement cache instruction.
+ * TORU=0: Trap on Root Unimplement.
+ * CACTRL=1: Root control cache.
+ * TOP=0: Trap on Previlege.
+ * TOE=0: Trap on Exception.
+ * TIT=0: Trap on Timer.
+ */
+ if (env & CSR_GCFG_GCIP_ALL)
+ gcfg |= CSR_GCFG_GCI_SECURE;
+ if (env & CSR_GCFG_MATC_ROOT)
+ gcfg |= CSR_GCFG_MATC_ROOT;
+
+ gcfg |= CSR_GCFG_TIT;
+ write_csr_gcfg(gcfg);
+
+ kvm_flush_tlb_all();
+
+ /* Enable using TGID */
+ set_csr_gtlbc(CSR_GTLBC_USETGID);
+ kvm_debug("GCFG:%lx GSTAT:%lx GINTC:%lx GTLBC:%lx",
+ read_csr_gcfg(), read_csr_gstat(), read_csr_gintc(), read_csr_gtlbc());
+
+ return 0;
+}
+
+void kvm_arch_hardware_disable(void)
+{
+ write_csr_gcfg(0);
+ write_csr_gstat(0);
+ write_csr_gintc(0);
+ clear_csr_gtlbc(CSR_GTLBC_USETGID | CSR_GTLBC_TOTI);
+
+ /* Flush any remaining guest TLB entries */
+ kvm_flush_tlb_all();
+}
+
static int kvm_loongarch_env_init(void)
{
int cpu, order;
--
2.39.3
