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RISC-V: KVM: Fix reg_val check in kvm_riscv_vcpu_set_reg_config()

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The reg_val check in kvm_riscv_vcpu_set_reg_config() should only
be done for isa config register.

Fixes: 9bfd900bee ("RISC-V: KVM: Improve ISA extension by using a bitmap")
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Anup Patel 2022-12-07 09:16:51 +05:30 committed by Anup Patel
parent 3e2d4756e2
commit e482d9e33d
1 changed files with 7 additions and 4 deletions
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11
arch/riscv/kvm/vcpu.c
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@ -296,12 +296,15 @@ static int kvm_riscv_vcpu_set_reg_config(struct kvm_vcpu *vcpu,
if (copy_from_user(&reg_val, uaddr, KVM_REG_SIZE(reg->id)))
return -EFAULT;
/* This ONE REG interface is only defined for single letter extensions */
if (fls(reg_val) >= RISCV_ISA_EXT_BASE)
return -EINVAL;
switch (reg_num) {
case KVM_REG_RISCV_CONFIG_REG(isa):
/*
* This ONE REG interface is only defined for
* single letter extensions.
*/
if (fls(reg_val) >= RISCV_ISA_EXT_BASE)
return -EINVAL;
if (!vcpu->arch.ran_atleast_once) {
/* Ignore the enable/disable request for certain extensions */
for (i = 0; i < RISCV_ISA_EXT_BASE; i++) {