arm64: KVM: VHE: Differenciate host/guest sysreg save/restore
With ARMv8, host and guest share the same system register file,
making the save/restore procedure completely symetrical.
With VHE, host and guest now have different requirements, as they
use different sysregs.
In order to prepare for this, add split sysreg save/restore functions
for both host and guest. No functional changes yet.
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
diff --git a/arch/arm64/kvm/hyp/sysreg-sr.c b/arch/arm64/kvm/hyp/sysreg-sr.c
index 42563098..bd5b543 100644
--- a/arch/arm64/kvm/hyp/sysreg-sr.c
+++ b/arch/arm64/kvm/hyp/sysreg-sr.c
@@ -24,7 +24,7 @@
#include "hyp.h"
/* ctxt is already in the HYP VA space */
-void __hyp_text __sysreg_save_state(struct kvm_cpu_context *ctxt)
+static void __hyp_text __sysreg_save_state(struct kvm_cpu_context *ctxt)
{
ctxt->sys_regs[MPIDR_EL1] = read_sysreg(vmpidr_el2);
ctxt->sys_regs[CSSELR_EL1] = read_sysreg(csselr_el1);
@@ -57,7 +57,17 @@
ctxt->gp_regs.spsr[KVM_SPSR_EL1]= read_sysreg(spsr_el1);
}
-void __hyp_text __sysreg_restore_state(struct kvm_cpu_context *ctxt)
+void __hyp_text __sysreg_save_host_state(struct kvm_cpu_context *ctxt)
+{
+ __sysreg_save_state(ctxt);
+}
+
+void __hyp_text __sysreg_save_guest_state(struct kvm_cpu_context *ctxt)
+{
+ __sysreg_save_state(ctxt);
+}
+
+static void __hyp_text __sysreg_restore_state(struct kvm_cpu_context *ctxt)
{
write_sysreg(ctxt->sys_regs[MPIDR_EL1], vmpidr_el2);
write_sysreg(ctxt->sys_regs[CSSELR_EL1], csselr_el1);
@@ -90,6 +100,16 @@
write_sysreg(ctxt->gp_regs.spsr[KVM_SPSR_EL1], spsr_el1);
}
+void __hyp_text __sysreg_restore_host_state(struct kvm_cpu_context *ctxt)
+{
+ __sysreg_restore_state(ctxt);
+}
+
+void __hyp_text __sysreg_restore_guest_state(struct kvm_cpu_context *ctxt)
+{
+ __sysreg_restore_state(ctxt);
+}
+
void __hyp_text __sysreg32_save_state(struct kvm_vcpu *vcpu)
{
u64 *spsr, *sysreg;