Messages in this thread | | | Date | Thu, 27 Jul 2017 17:58:52 +0200 | From | Joerg Roedel <> | Subject | Re: [PATCH v8 13/13] iommu/amd: Disable iommu only if amd_iommu=off is specified |
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On Fri, Jul 21, 2017 at 04:59:11PM +0800, Baoquan He wrote: > From: root <root@amd-dinar-02.lab.bos.redhat.com>
You probaly need to reset the author on this one.
> > It's ok to disable iommu in normal kernel. While there's no need > to disable it in kdump kernel after the on-flight dma issue has > heen fixed. > > Signed-off-by: Baoquan He <bhe@redhat.com> > --- > drivers/iommu/amd_iommu_init.c | 3 ++- > 1 file changed, 2 insertions(+), 1 deletion(-) > > diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c > index 8b4bac978062..880f693c809b 100644 > --- a/drivers/iommu/amd_iommu_init.c > +++ b/drivers/iommu/amd_iommu_init.c > @@ -2494,7 +2494,8 @@ static int __init early_amd_iommu_init(void) > goto out; > > /* Disable any previously enabled IOMMUs */ > - disable_iommus(); > + if (amd_iommu_disabled) > + disable_iommus(); > > if (amd_iommu_irq_remap) > amd_iommu_irq_remap = check_ioapic_information(); > -- > 2.5.5
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