Commit 1deeffb5 authored by Marc Zyngier's avatar Marc Zyngier
Browse files

KVM: arm64: Reorder handling of invariant sysregs from userspace 



In order to allow some further refactor of the sysreg helpers,
move the handling of invariant sysreg to occur before we handle
all the other ones.

Reviewed-by: default avatarReiji Watanabe <reijiw@google.com>
Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
parent da8d120f

arch/arm64/kvm/sys_regs.c

+12 −6
Original line number Diff line number Diff line
@@ -2849,6 +2849,7 @@ int kvm_arm_sys_reg_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg 
{

	const struct sys_reg_desc *r;

	void __user *uaddr = (void __user *)(unsigned long)reg->addr;

	int err;



	if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_DEMUX)

		return demux_c15_get(reg->id, uaddr);
@@ -2856,12 +2857,14 @@ int kvm_arm_sys_reg_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg 
	if (KVM_REG_SIZE(reg->id) != sizeof(__u64))

		return -ENOENT;



	err = get_invariant_sys_reg(reg->id, uaddr);

	if (err != -ENOENT)

		return err;



	r = index_to_sys_reg_desc(vcpu, reg->id);

	if (!r)

		return get_invariant_sys_reg(reg->id, uaddr);



	/* Check for regs disabled by runtime config */

	if (sysreg_hidden(vcpu, r))

	if (!r || sysreg_hidden(vcpu, r))

		return -ENOENT;



	if (r->get_user)
@@ -2874,6 +2877,7 @@ int kvm_arm_sys_reg_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg 
{

	const struct sys_reg_desc *r;

	void __user *uaddr = (void __user *)(unsigned long)reg->addr;

	int err;



	if ((reg->id & KVM_REG_ARM_COPROC_MASK) == KVM_REG_ARM_DEMUX)

		return demux_c15_set(reg->id, uaddr);
@@ -2881,12 +2885,14 @@ int kvm_arm_sys_reg_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg 
	if (KVM_REG_SIZE(reg->id) != sizeof(__u64))

		return -ENOENT;



	err = set_invariant_sys_reg(reg->id, uaddr);

	if (err != -ENOENT)

		return err;



	r = index_to_sys_reg_desc(vcpu, reg->id);

	if (!r)

		return set_invariant_sys_reg(reg->id, uaddr);



	/* Check for regs disabled by runtime config */

	if (sysreg_hidden(vcpu, r))

	if (!r || sysreg_hidden(vcpu, r))

		return -ENOENT;



	if (r->set_user)