Commit 99a33937 authored by Zenghui Yu (Huawei)'s avatar Zenghui Yu (Huawei) Committed by Marc Zyngier
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KVM: arm64: nv: Report addrsz fault at level 0 with a bad VTTBR.BADDR 



As per R_BFHQH,

" When an Address size fault is generated, the reported fault code
  indicates one of the following:

  If the fault was generated due to the TTBR_ELx used in the translation
  having nonzero address bits above the OA size, then a fault at level 0. "

Fix the reported Address size fault level as being 0 if the base address is
wrongly programmed by L1.

Fixes: 61e30b9e ("KVM: arm64: nv: Implement nested Stage-2 page table walk logic")
Signed-off-by: default avatarZenghui Yu (Huawei) <zenghui.yu@linux.dev>
Link: https://patch.msgid.link/20260225173515.20490-3-zenghui.yu@linux.dev


Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
parent 4c2264ec

arch/arm64/kvm/nested.c

+2 −1
Original line number Diff line number Diff line
@@ -280,7 +280,8 @@ static int walk_nested_s2_pgd(struct kvm_vcpu *vcpu, phys_addr_t ipa, 
	base_addr = wi->baddr & GENMASK_ULL(47, base_lower_bound);



	if (check_output_size(wi, base_addr)) {

		out->esr = compute_fsc(level, ESR_ELx_FSC_ADDRSZ);

		/* R_BFHQH */

		out->esr = compute_fsc(0, ESR_ELx_FSC_ADDRSZ);

		return 1;

	}