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46ad899 |
Or rather just implement one different function as opposed
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46ad899 |
to the native one : the read function.
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46ad899 |
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46ad899 |
We synthesize the values.
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46ad899 |
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46ad899 |
Acked-by: Suresh Siddha <suresh.b.siddha@intel.com>
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46ad899 |
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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46ad899 |
---
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46ad899 |
arch/x86/xen/Makefile | 2 +-
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46ad899 |
arch/x86/xen/apic.c | 17 +++++++++++++++++
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46ad899 |
arch/x86/xen/enlighten.c | 2 ++
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46ad899 |
arch/x86/xen/xen-ops.h | 4 ++++
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46ad899 |
4 files changed, 24 insertions(+), 1 deletions(-)
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46ad899 |
create mode 100644 arch/x86/xen/apic.c
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46ad899 |
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46ad899 |
diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile
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46ad899 |
index add2c2d..96ab2c0 100644
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46ad899 |
--- a/arch/x86/xen/Makefile
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46ad899 |
+++ b/arch/x86/xen/Makefile
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46ad899 |
@@ -20,5 +20,5 @@ obj-$(CONFIG_EVENT_TRACING) += trace.o
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46ad899 |
obj-$(CONFIG_SMP) += smp.o
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|
46ad899 |
obj-$(CONFIG_PARAVIRT_SPINLOCKS)+= spinlock.o
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46ad899 |
obj-$(CONFIG_XEN_DEBUG_FS) += debugfs.o
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46ad899 |
-obj-$(CONFIG_XEN_DOM0) += vga.o
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46ad899 |
+obj-$(CONFIG_XEN_DOM0) += apic.o vga.o
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|
46ad899 |
obj-$(CONFIG_SWIOTLB_XEN) += pci-swiotlb-xen.o
|
|
|
46ad899 |
diff --git a/arch/x86/xen/apic.c b/arch/x86/xen/apic.c
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|
|
46ad899 |
new file mode 100644
|
|
|
46ad899 |
index 0000000..71ed91c
|
|
|
46ad899 |
--- /dev/null
|
|
|
46ad899 |
+++ b/arch/x86/xen/apic.c
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|
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46ad899 |
@@ -0,0 +1,17 @@
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46ad899 |
+#include <linux/init.h>
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|
46ad899 |
+#include <asm/x86_init.h>
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|
|
46ad899 |
+
|
|
|
46ad899 |
+unsigned int xen_io_apic_read(unsigned apic, unsigned reg)
|
|
|
46ad899 |
+{
|
|
|
46ad899 |
+ if (reg == 0x1)
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|
|
46ad899 |
+ return 0x00170020;
|
|
|
46ad899 |
+ else if (reg == 0x0)
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|
|
46ad899 |
+ return apic << 24;
|
|
|
46ad899 |
+
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|
46ad899 |
+ return 0xff;
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|
|
46ad899 |
+}
|
|
|
46ad899 |
+
|
|
|
46ad899 |
+void __init xen_init_apic(void)
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|
|
46ad899 |
+{
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|
|
46ad899 |
+ x86_ioapic.read = xen_io_apic_read;
|
|
|
46ad899 |
+}
|
|
|
46ad899 |
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
|
|
|
46ad899 |
index 0732326..93a03195 100644
|
|
|
46ad899 |
--- a/arch/x86/xen/enlighten.c
|
|
|
46ad899 |
+++ b/arch/x86/xen/enlighten.c
|
|
|
46ad899 |
@@ -1377,6 +1377,8 @@ asmlinkage void __init xen_start_kernel(void)
|
|
|
46ad899 |
xen_start_info->console.domU.mfn = 0;
|
|
|
46ad899 |
xen_start_info->console.domU.evtchn = 0;
|
|
|
46ad899 |
|
|
|
46ad899 |
+ xen_init_apic();
|
|
|
46ad899 |
+
|
|
|
46ad899 |
/* Make sure ACS will be enabled */
|
|
|
46ad899 |
pci_request_acs();
|
|
|
46ad899 |
|
|
|
46ad899 |
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
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|
|
46ad899 |
index b095739..45c0c06 100644
|
|
|
46ad899 |
--- a/arch/x86/xen/xen-ops.h
|
|
|
46ad899 |
+++ b/arch/x86/xen/xen-ops.h
|
|
|
46ad899 |
@@ -92,11 +92,15 @@ struct dom0_vga_console_info;
|
|
|
46ad899 |
|
|
|
46ad899 |
#ifdef CONFIG_XEN_DOM0
|
|
|
46ad899 |
void __init xen_init_vga(const struct dom0_vga_console_info *, size_t size);
|
|
|
46ad899 |
+void __init xen_init_apic(void);
|
|
|
46ad899 |
#else
|
|
|
46ad899 |
static inline void __init xen_init_vga(const struct dom0_vga_console_info *info,
|
|
|
46ad899 |
size_t size)
|
|
|
46ad899 |
{
|
|
|
46ad899 |
}
|
|
|
46ad899 |
+static inline void __init xen_init_apic(void)
|
|
|
46ad899 |
+{
|
|
|
46ad899 |
+}
|
|
|
46ad899 |
#endif
|
|
|
46ad899 |
|
|
|
46ad899 |
/* Declare an asm function, along with symbols needed to make it
|
|
|
46ad899 |
--
|
|
|
46ad899 |
1.7.7.5
|
|
|
46ad899 |
|