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| author | Jan Beulich <jbeulich@suse.com> | 2013-06-05 10:15:37 +0200 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2013-06-05 10:15:37 +0200 |
| commit | 50fa233019351cbc47dc7b3bb63dd1a50fbd8a49 (patch) | |
| tree | b33fbfb07049002e2189de535cdf8666e2e479d4 | |
| parent | 13e00caf1a01a4eb99f2269be6ce12a3a4703178 (diff) | |
| download | xen-50fa233019351cbc47dc7b3bb63dd1a50fbd8a49.tar.gz xen-50fa233019351cbc47dc7b3bb63dd1a50fbd8a49.tar.bz2 xen-50fa233019351cbc47dc7b3bb63dd1a50fbd8a49.zip | |
Revert "AMD/iommu: SR56x0 Erratum 64 - Reset all head & tail pointers"
This reverts commit 22de18bb89e776f77256653901a590aad9fc0a52.
The code this patch added is redundant with already present code in
set_iommu_{command_buffer,event_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 | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/xen/drivers/passthrough/amd/iommu_init.c b/xen/drivers/passthrough/amd/iommu_init.c index adf220b3c6..fcb7e87f5f 100644 --- a/xen/drivers/passthrough/amd/iommu_init.c +++ b/xen/drivers/passthrough/amd/iommu_init.c @@ -119,11 +119,6 @@ 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) @@ -151,11 +146,6 @@ 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 set_iommu_translation_control(struct amd_iommu *iommu, |