From: Christoffer Dall Date: Thu, 29 Nov 2018 11:20:01 +0000 (+0100) Subject: KVM: arm64: Make vcpu const in vcpu_read_sys_reg X-Git-Tag: for-linus-20190104~109^2~51^2~6 X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=da6f16662a6eba3de0d1a39f3b8913d38754bb2b;p=linux-2.6-block.git 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 Signed-off-by: Marc Zyngier --- diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 7a5035f9c5c3..c22e50ba3473 100644 --- 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 index ecbf67ccabf5..965c6f1706d6 100644 --- 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;