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| author | Jan Beulich <jbeulich@suse.com> | 2013-06-05 10:11:50 +0200 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2013-06-05 10:11:50 +0200 |
| commit | ec01a2789ec06e02cdff55d0868816cd19fb2680 (patch) | |
| tree | 6bbede01d12888b80e5d6579096e75ca89b9a46f | |
| parent | 9c28f338208bdc3f8f03934f58aabf2724c42cdb (diff) | |
| download | xen-ec01a2789ec06e02cdff55d0868816cd19fb2680.tar.gz xen-ec01a2789ec06e02cdff55d0868816cd19fb2680.tar.bz2 xen-ec01a2789ec06e02cdff55d0868816cd19fb2680.zip | |
Revert "AMD/iommu: SR56x0 Erratum 64 - Reset all head & tail pointers"
This reverts commit 5ea99fa5355c9bb768388b7cf86950fd808ab2d3.
The code this patch added is redundant with already present code in
set_iommu_{command_buffer,{event,ppr}_log}_control().
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
master commit: e430510e5cbbfcdc1077739292def633e70fedea
master date: 2013-06-05 10:05:49 +0200
| -rw-r--r-- | xen/drivers/passthrough/amd/iommu_init.c | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/xen/drivers/passthrough/amd/iommu_init.c b/xen/drivers/passthrough/amd/iommu_init.c index d8769723f0..ebf964cb33 100644 --- a/xen/drivers/passthrough/amd/iommu_init.c +++ b/xen/drivers/passthrough/amd/iommu_init.c @@ -154,11 +154,6 @@ static void register_iommu_cmd_buffer_in_mmio_space(struct amd_iommu *iommu) IOMMU_CMD_BUFFER_LENGTH_MASK, IOMMU_CMD_BUFFER_LENGTH_SHIFT, &entry); writel(entry, iommu->mmio_base+IOMMU_CMD_BUFFER_BASE_HIGH_OFFSET); - - /* Reset head/tail pointer. SR56x0 Erratum 64 means this might not happen - * automatically for us. */ - writel(0, iommu->mmio_base + IOMMU_CMD_BUFFER_HEAD_OFFSET); - writel(0, iommu->mmio_base + IOMMU_CMD_BUFFER_TAIL_OFFSET); } static void register_iommu_event_log_in_mmio_space(struct amd_iommu *iommu) @@ -187,11 +182,6 @@ static void register_iommu_event_log_in_mmio_space(struct amd_iommu *iommu) IOMMU_EVENT_LOG_LENGTH_MASK, IOMMU_EVENT_LOG_LENGTH_SHIFT, &entry); writel(entry, iommu->mmio_base+IOMMU_EVENT_LOG_BASE_HIGH_OFFSET); - - /* Reset head/tail pointer. SR56x0 Erratum 64 means this might not happen - * automatically for us. */ - writel(0, iommu->mmio_base + IOMMU_EVENT_LOG_HEAD_OFFSET); - writel(0, iommu->mmio_base + IOMMU_EVENT_LOG_TAIL_OFFSET); } static void register_iommu_ppr_log_in_mmio_space(struct amd_iommu *iommu) @@ -220,9 +210,6 @@ static void register_iommu_ppr_log_in_mmio_space(struct amd_iommu *iommu) IOMMU_PPR_LOG_LENGTH_MASK, IOMMU_PPR_LOG_LENGTH_SHIFT, &entry); writel(entry, iommu->mmio_base + IOMMU_PPR_LOG_BASE_HIGH_OFFSET); - - writel(0, iommu->mmio_base + IOMMU_PPR_LOG_HEAD_OFFSET); - writel(0, iommu->mmio_base + IOMMU_PPR_LOG_TAIL_OFFSET); } |