From d9b201e99c616001b4a51627820377b293479384 Mon Sep 17 00:00:00 2001 From: Eric Auger Date: Mon, 5 Apr 2021 18:39:33 +0200 Subject: [PATCH] KVM: arm64: vgic-v3: Fix some error codes when setting RDIST base KVM_DEV_ARM_VGIC_GRP_ADDR group doc says we should return -EEXIST in case the base address of the redist is already set. We currently return -EINVAL. However we need to return -EINVAL in case a legacy REDIST address is attempted to be set while REDIST_REGIONS were set. This case is discriminated by looking at the count field. Signed-off-by: Eric Auger Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20210405163941.510258-2-eric.auger@redhat.com --- arch/arm64/kvm/vgic/vgic-mmio-v3.c | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/arch/arm64/kvm/vgic/vgic-mmio-v3.c b/arch/arm64/kvm/vgic/vgic-mmio-v3.c index 15a6c98ee92f..ef9baf0d01b5 100644 --- a/arch/arm64/kvm/vgic/vgic-mmio-v3.c +++ b/arch/arm64/kvm/vgic/vgic-mmio-v3.c @@ -791,10 +791,6 @@ static int vgic_v3_insert_redist_region(struct kvm *kvm, uint32_t index, size_t size = count * KVM_VGIC_V3_REDIST_SIZE; int ret; - /* single rdist region already set ?*/ - if (!count && !list_empty(rd_regions)) - return -EINVAL; - /* cross the end of memory ? */ if (base + size < base) return -EINVAL; @@ -805,11 +801,15 @@ static int vgic_v3_insert_redist_region(struct kvm *kvm, uint32_t index, } else { rdreg = list_last_entry(rd_regions, struct vgic_redist_region, list); - if (index != rdreg->index + 1) + + /* Don't mix single region and discrete redist regions */ + if (!count && rdreg->count) return -EINVAL; - /* Cannot add an explicitly sized regions after legacy region */ - if (!rdreg->count) + if (!count) + return -EEXIST; + + if (index != rdreg->index + 1) return -EINVAL; } -- 2.20.1