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RISC-V: KVM: Simplify kvm_arch_prepare_memory_region()

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In kvm_arch_prepare_memory_region(), if no error occurs, a spin_lock()/
spin_unlock() call can be avoided.

Switch to kvm_riscv_gstage_iounmap() that is the same as the current code,
but with a better semantic.
It also embeds the locking logic. So it is avoided if ret == 0.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Christophe JAILLET 2022-12-07 09:16:39 +05:30 committed by Anup Patel
parent af934432e4
commit 3e2d4756e2
1 changed files with 1 additions and 3 deletions
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4
arch/riscv/kvm/mmu.c
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@ -537,10 +537,8 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm,
if (change == KVM_MR_FLAGS_ONLY)
goto out;
spin_lock(&kvm->mmu_lock);
if (ret)
gstage_unmap_range(kvm, base_gpa, size, false);
spin_unlock(&kvm->mmu_lock);
kvm_riscv_gstage_iounmap(kvm, base_gpa, size);
out:
mmap_read_unlock(current->mm);