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RISC-V: KVM: Fix skip of valid pages in kvm_riscv_gstage_unmap_range

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Same as kvm_riscv_gstage_wp_range, the possible valid pages should not
be skipped if !found_leaf. Different from wp case, which can
write-protect more than asked, unmap can't do that, no splitting is
added right now but a warning is logged instead.

Signed-off-by: Wu Fei <wu.fei9@sanechips.com.cn>
Reviewed-by: Anup Patel <anup@brainfault.org>
Link: https://lore.kernel.org/r/20260604230317.30501-3-atwufei@163.com
Signed-off-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Wu Fei 2026-06-05 07:03:15 +08:00 committed by Anup Patel
parent 0d9dc20842
commit a5f8307e2e
1 changed files with 12 additions and 8 deletions
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20
arch/riscv/kvm/gstage.c
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@ -418,15 +418,19 @@ bool kvm_riscv_gstage_unmap_range(struct kvm_gstage *gstage,
if (ret)
break;
if (!found_leaf)
goto next;
if (!found_leaf) {
addr = ALIGN(addr + 1, page_size);
} else {
if (!(addr & (page_size - 1)) && ((end - addr) >= page_size))
flush |= kvm_riscv_gstage_op_pte(gstage, addr, ptep,
ptep_level, GSTAGE_OP_CLEAR);
else {
WARN_ONCE(1, "Skip unmap range addr: %#llx, end: %#llx, page_size: %#lx\n",
addr, end, page_size);
}
if (!(addr & (page_size - 1)) && ((end - addr) >= page_size))
flush |= kvm_riscv_gstage_op_pte(gstage, addr, ptep,
ptep_level, GSTAGE_OP_CLEAR);
next:
addr += page_size;
addr += page_size;
}
/*
* If the range is too large, release the kvm->mmu_lock