* [PATCH v2] x86: irq_remapping: Fix the regression of hpet irq remapping
@ 2014-09-17 9:32 Yijing Wang
[not found] ` <1410946339-27764-1-git-send-email-wangyijing-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
0 siblings, 1 reply; 2+ messages in thread
From: Yijing Wang @ 2014-09-17 9:32 UTC (permalink / raw)
To: Joerg Roedel
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA,
David Woodhouse, Jiang Liu
Commit 71054d8841b4 ("x86, hpet: Introduce x86_msi_ops.setup_hpet_msi")
introduced x86_msi_ops.setup_hpet_msi to setup hpet MSI irq
when irq remapping enabled. This caused a regression of
hpet MSI irq remapping.
Original code flow before commit 71054d8841b4:
hpet_setup_msi_irq()
arch_setup_hpet_msi()
setup_hpet_msi_remapped()
remap_ops->setup_hpet_msi()
alloc_irte()
msi_compose_msg()
hpet_msi_write()
...
Current code flow after commit 71054d8841b4:
hpet_setup_msi_irq()
x86_msi.setup_hpet_msi()
setup_hpet_msi_remapped()
intel_setup_hpet_msi()
alloc_irte()
Currently, we only call alloc_irte() for hpet MSI, but
do not composed and wrote its msg...
Signed-off-by: Yijing Wang <wangyijing-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
---
v1->v2: rename remap_ops->setup_hpet_msi to remap_ops->alloc_hpet_msi.
---
drivers/iommu/amd_iommu.c | 4 ++--
drivers/iommu/intel_irq_remapping.c | 4 ++--
drivers/iommu/irq_remapping.c | 11 +++++++++--
drivers/iommu/irq_remapping.h | 2 +-
4 files changed, 14 insertions(+), 7 deletions(-)
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 1840531..0398314 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -4233,7 +4233,7 @@ static int msi_setup_irq(struct pci_dev *pdev, unsigned int irq,
return 0;
}
-static int setup_hpet_msi(unsigned int irq, unsigned int id)
+static int alloc_hpet_msi(unsigned int irq, unsigned int id)
{
struct irq_2_irte *irte_info;
struct irq_cfg *cfg;
@@ -4272,6 +4272,6 @@ struct irq_remap_ops amd_iommu_irq_ops = {
.compose_msi_msg = compose_msi_msg,
.msi_alloc_irq = msi_alloc_irq,
.msi_setup_irq = msi_setup_irq,
- .setup_hpet_msi = setup_hpet_msi,
+ .alloc_hpet_msi = alloc_hpet_msi,
};
#endif
diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
index a872874..7c80661 100644
--- a/drivers/iommu/intel_irq_remapping.c
+++ b/drivers/iommu/intel_irq_remapping.c
@@ -1138,7 +1138,7 @@ static int intel_msi_setup_irq(struct pci_dev *pdev, unsigned int irq,
return ret;
}
-static int intel_setup_hpet_msi(unsigned int irq, unsigned int id)
+static int intel_alloc_hpet_msi(unsigned int irq, unsigned int id)
{
int ret = -1;
struct intel_iommu *iommu;
@@ -1169,5 +1169,5 @@ struct irq_remap_ops intel_irq_remap_ops = {
.compose_msi_msg = intel_compose_msi_msg,
.msi_alloc_irq = intel_msi_alloc_irq,
.msi_setup_irq = intel_msi_setup_irq,
- .setup_hpet_msi = intel_setup_hpet_msi,
+ .alloc_hpet_msi = intel_alloc_hpet_msi,
};
diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
index 33c4395..74a1767 100644
--- a/drivers/iommu/irq_remapping.c
+++ b/drivers/iommu/irq_remapping.c
@@ -12,6 +12,7 @@
#include <asm/processor.h>
#include <asm/x86_init.h>
#include <asm/apic.h>
+#include <asm/hpet.h>
#include "irq_remapping.h"
@@ -345,10 +346,16 @@ static int msi_setup_remapped_irq(struct pci_dev *pdev, unsigned int irq,
int setup_hpet_msi_remapped(unsigned int irq, unsigned int id)
{
- if (!remap_ops || !remap_ops->setup_hpet_msi)
+ int ret;
+
+ if (!remap_ops || !remap_ops->alloc_hpet_msi)
return -ENODEV;
- return remap_ops->setup_hpet_msi(irq, id);
+ ret = remap_ops->alloc_hpet_msi(irq, id);
+ if (ret)
+ return -EINVAL;
+
+ return default_setup_hpet_msi(irq, id);
}
void panic_if_irq_remap(const char *msg)
diff --git a/drivers/iommu/irq_remapping.h b/drivers/iommu/irq_remapping.h
index 90c4dae..fde250f 100644
--- a/drivers/iommu/irq_remapping.h
+++ b/drivers/iommu/irq_remapping.h
@@ -80,7 +80,7 @@ struct irq_remap_ops {
int (*msi_setup_irq)(struct pci_dev *, unsigned int, int, int);
/* Setup interrupt remapping for an HPET MSI */
- int (*setup_hpet_msi)(unsigned int, unsigned int);
+ int (*alloc_hpet_msi)(unsigned int, unsigned int);
};
extern struct irq_remap_ops intel_irq_remap_ops;
--
1.7.1
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2014-09-17 9:32 [PATCH v2] x86: irq_remapping: Fix the regression of hpet irq remapping Yijing Wang
[not found] ` <1410946339-27764-1-git-send-email-wangyijing-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2014-09-25 17:12 ` Joerg Roedel
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