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Subject[PATCH 05/19] x86, hpet: Introduce x86_msi_ops.setup_hpet_msi
Date
This function pointer can be overwritten by the IRQ
remapping code. The irq_remapping_enabled check can be
removed from default_setup_hpet_msi.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---
arch/x86/include/asm/hpet.h | 5 +++--
arch/x86/include/asm/x86_init.h | 1 +
arch/x86/kernel/apic/io_apic.c | 7 +------
arch/x86/kernel/hpet.c | 2 +-
arch/x86/kernel/x86_init.c | 10 ++++++----
drivers/iommu/irq_remapping.c | 3 ++-
6 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/arch/x86/include/asm/hpet.h b/arch/x86/include/asm/hpet.h
index 2c392d6..ad2dae0 100644
--- a/arch/x86/include/asm/hpet.h
+++ b/arch/x86/include/asm/hpet.h
@@ -82,9 +82,9 @@ extern void hpet_msi_write(struct hpet_dev *hdev, struct msi_msg *msg);
extern void hpet_msi_read(struct hpet_dev *hdev, struct msi_msg *msg);

#ifdef CONFIG_PCI_MSI
-extern int arch_setup_hpet_msi(unsigned int irq, unsigned int id);
+extern int default_setup_hpet_msi(unsigned int irq, unsigned int id);
#else
-static inline int arch_setup_hpet_msi(unsigned int irq, unsigned int id)
+static inline int default_setup_hpet_msi(unsigned int irq, unsigned int id)
{
return -EINVAL;
}
@@ -113,6 +113,7 @@ extern void hpet_unregister_irq_handler(rtc_irq_handler handler);
static inline int hpet_enable(void) { return 0; }
static inline int is_hpet_enabled(void) { return 0; }
#define hpet_readl(a) 0
+#define default_setup_hpet_msi NULL

#endif
#endif /* _ASM_X86_HPET_H */
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index be8e9a6..1f49c8a 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -186,6 +186,7 @@ struct x86_msi_ops {
void (*teardown_msi_irq)(unsigned int irq);
void (*teardown_msi_irqs)(struct pci_dev *dev);
void (*restore_msi_irqs)(struct pci_dev *dev, int irq);
+ int (*setup_hpet_msi)(unsigned int irq, unsigned int id);
};

struct x86_io_apic_ops {
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 1ac89a6..3d58775 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -3297,17 +3297,12 @@ static struct irq_chip hpet_msi_type = {
.irq_retrigger = ioapic_retrigger_irq,
};

-int arch_setup_hpet_msi(unsigned int irq, unsigned int id)
+int default_setup_hpet_msi(unsigned int irq, unsigned int id)
{
struct irq_chip *chip = &hpet_msi_type;
struct msi_msg msg;
int ret;

- if (irq_remapping_enabled) {
- if (!setup_hpet_msi_remapped(irq, id))
- return -1;
- }
-
ret = msi_compose_msg(NULL, irq, &msg, id);
if (ret < 0)
return ret;
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index 1460a5d..22d4fe5 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -478,7 +478,7 @@ static int hpet_msi_next_event(unsigned long delta,

static int hpet_setup_msi_irq(unsigned int irq)
{
- if (arch_setup_hpet_msi(irq, hpet_blockid)) {
+ if (x86_msi.setup_hpet_msi(irq, hpet_blockid)) {
destroy_irq(irq);
return -EINVAL;
}
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index dc19c50..339e108 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -19,6 +19,7 @@
#include <asm/time.h>
#include <asm/irq.h>
#include <asm/io_apic.h>
+#include <asm/hpet.h>
#include <asm/pat.h>
#include <asm/tsc.h>
#include <asm/iommu.h>
@@ -113,10 +114,11 @@ struct x86_platform_ops x86_platform = {

EXPORT_SYMBOL_GPL(x86_platform);
struct x86_msi_ops x86_msi = {
- .setup_msi_irqs = native_setup_msi_irqs,
- .teardown_msi_irq = native_teardown_msi_irq,
- .teardown_msi_irqs = default_teardown_msi_irqs,
- .restore_msi_irqs = default_restore_msi_irqs,
+ .setup_msi_irqs = native_setup_msi_irqs,
+ .teardown_msi_irq = native_teardown_msi_irq,
+ .teardown_msi_irqs = default_teardown_msi_irqs,
+ .restore_msi_irqs = default_restore_msi_irqs,
+ .setup_hpet_msi = default_setup_hpet_msi,
};

struct x86_io_apic_ops x86_io_apic_ops = {
diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
index f72a5e8..f439151 100644
--- a/drivers/iommu/irq_remapping.c
+++ b/drivers/iommu/irq_remapping.c
@@ -36,7 +36,8 @@ static void irq_remapping_disable_io_apic(void)

static void __init irq_remapping_modify_x86_ops(void)
{
- x86_io_apic_ops.disable = irq_remapping_disable_io_apic;
+ x86_io_apic_ops.disable = irq_remapping_disable_io_apic;
+ x86_msi.setup_hpet_msi = setup_hpet_msi_remapped;
}

static __init int setup_nointremap(char *str)
--
1.7.9.5



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