KVM: arm64: Make vcpu const in vcpu_read_sys_reg

vcpu_read_sys_reg should not be modifying the VCPU structure. Eventually, to handle EL2 sysregs for nested virtualization, we will call vcpu_read_sys_reg from places that have a const vcpu pointer, which will complain about the lack of the const modifier on the read path. Signed-off-by: Christoffer Dall <christoffer.dall@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
mariux64 · Dec 19, 2018 · da6f166 · da6f166
1 parent 6e14ef1
commit da6f166
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Showing 2 changed files with 2 additions and 2 deletions.
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
@@ -319,7 +319,7 @@ struct kvm_vcpu_arch {
  */
 #define __vcpu_sys_reg(v,r)	((v)->arch.ctxt.sys_regs[(r)])
 
-u64 vcpu_read_sys_reg(struct kvm_vcpu *vcpu, int reg);
+u64 vcpu_read_sys_reg(const struct kvm_vcpu *vcpu, int reg);
 void vcpu_write_sys_reg(struct kvm_vcpu *vcpu, u64 val, int reg);
 
 /*

diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
@@ -76,7 +76,7 @@ static bool write_to_read_only(struct kvm_vcpu *vcpu,
 	return false;
 }
 
-u64 vcpu_read_sys_reg(struct kvm_vcpu *vcpu, int reg)
+u64 vcpu_read_sys_reg(const struct kvm_vcpu *vcpu, int reg)
 {
 	if (!vcpu->arch.sysregs_loaded_on_cpu)
 		goto immediate_read;