From: Baoquan He <bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org
Cc: kexec-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
dyoung-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org
Subject: [PATCH v7 02/12] iommu/amd: add several helper function
Date: Fri, 25 Nov 2016 13:13:09 +0800 [thread overview]
Message-ID: <1480050799-1237-3-git-send-email-bhe@redhat.com> (raw)
In-Reply-To: <1480050799-1237-1-git-send-email-bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Move per iommu enabling code into a wrapper function early_enable_iommu().
This can make later kdump change easier.
And also add iommu_disable_command_buffer and iommu_disable_event_buffer
for later usage.
Signed-off-by: Baoquan He <bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
---
drivers/iommu/amd_iommu_init.c | 42 +++++++++++++++++++++++++++++++-----------
1 file changed, 31 insertions(+), 11 deletions(-)
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 5ad1e023..9458f7c 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -625,6 +625,14 @@ static void iommu_enable_command_buffer(struct amd_iommu *iommu)
amd_iommu_reset_cmd_buffer(iommu);
}
+/*
+ * This function disables the command buffer
+ */
+static void iommu_disable_command_buffer(struct amd_iommu *iommu)
+{
+ iommu_feature_disable(iommu, CONTROL_CMDBUF_EN);
+}
+
static void __init free_command_buffer(struct amd_iommu *iommu)
{
free_pages((unsigned long)iommu->cmd_buf, get_order(CMD_BUFFER_SIZE));
@@ -657,6 +665,14 @@ static void iommu_enable_event_buffer(struct amd_iommu *iommu)
iommu_feature_enable(iommu, CONTROL_EVT_LOG_EN);
}
+/*
+ * This function disables the command buffer
+ */
+static void iommu_disable_event_buffer(struct amd_iommu *iommu)
+{
+ iommu_feature_disable(iommu, CONTROL_EVT_LOG_EN);
+}
+
static void __init free_event_buffer(struct amd_iommu *iommu)
{
free_pages((unsigned long)iommu->evt_buf, get_order(EVT_BUFFER_SIZE));
@@ -2026,6 +2042,19 @@ static void iommu_enable_ga(struct amd_iommu *iommu)
#endif
}
+static void early_enable_iommu(struct amd_iommu *iommu)
+{
+ iommu_disable(iommu);
+ iommu_init_flags(iommu);
+ iommu_set_device_table(iommu);
+ iommu_enable_command_buffer(iommu);
+ iommu_enable_event_buffer(iommu);
+ iommu_set_exclusion_range(iommu);
+ iommu_enable_ga(iommu);
+ iommu_enable(iommu);
+ iommu_flush_all_caches(iommu);
+}
+
/*
* This function finally enables all IOMMUs found in the system after
* they have been initialized
@@ -2034,17 +2063,8 @@ static void early_enable_iommus(void)
{
struct amd_iommu *iommu;
- for_each_iommu(iommu) {
- iommu_disable(iommu);
- iommu_init_flags(iommu);
- iommu_set_device_table(iommu);
- iommu_enable_command_buffer(iommu);
- iommu_enable_event_buffer(iommu);
- iommu_set_exclusion_range(iommu);
- iommu_enable_ga(iommu);
- iommu_enable(iommu);
- iommu_flush_all_caches(iommu);
- }
+ for_each_iommu(iommu)
+ early_enable_iommu(iommu);
#ifdef CONFIG_IRQ_REMAP
if (AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir))
--
2.5.5
next prev parent reply other threads:[~2016-11-25 5:13 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-25 5:13 [PATCH v7 00/12] Fix kdump faults on system with amd iommu Baoquan He
[not found] ` <1480050799-1237-1-git-send-email-bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-11-25 5:13 ` [PATCH v7 01/12] iommu/amd: Detect pre enabled translation Baoquan He
2016-11-25 5:13 ` Baoquan He [this message]
2016-11-25 5:13 ` [PATCH v7 03/12] iommu/amd: Define bit fields for DTE particularly Baoquan He
2016-11-25 5:13 ` [PATCH v7 04/12] iommu/amd: Add function copy_dev_tables Baoquan He
2016-11-25 5:13 ` [PATCH v7 05/12] iommu/amd: copy old trans table from old kernel Baoquan He
2016-11-25 5:13 ` [PATCH v7 06/12] iommu: Add is_attach_deferred call-back to iommu-ops Baoquan He
2016-11-25 5:13 ` [PATCH v7 07/12] iommu/amd: Use is_attach_deferred call-back Baoquan He
2016-11-25 5:13 ` [PATCH v7 08/12] iommu/amd: Add sanity check of irq remap information of old dev table entry Baoquan He
2016-11-25 5:13 ` [PATCH v7 09/12] iommu/amd: Don't copy GCR3 table root pointer Baoquan He
2016-11-25 5:13 ` [PATCH v7 10/12] iommu/amd: Clear out the GV flag when handle deferred domain attach Baoquan He
2016-11-25 5:13 ` [PATCH v7 11/12] iommu: Assign the direct mapped domain to group->domain Baoquan He
2016-11-25 5:13 ` [PATCH v7 12/12] iommu/amd: Allocate memory below 4G for dev table if translation pre-enabled Baoquan He
2016-12-24 3:47 ` [PATCH v7 00/12] Fix kdump faults on system with amd iommu Baoquan He
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