Messages in this thread Patch in this message | | | From | Konrad Rzeszutek Wilk <> | Subject | [PATCH 3/3] xen/x86: Implement x86_apic_ops | Date | Tue, 20 Mar 2012 20:12:44 -0400 |
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Or rather just implement one different function as opposed to the native one : the read function.
We synthesize the values.
Suggested-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> --- arch/x86/xen/Makefile | 2 +- arch/x86/xen/apic.c | 17 +++++++++++++++++ arch/x86/xen/enlighten.c | 2 ++ arch/x86/xen/xen-ops.h | 4 ++++ 4 files changed, 24 insertions(+), 1 deletions(-) create mode 100644 arch/x86/xen/apic.c
diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile index add2c2d..96ab2c0 100644 --- a/arch/x86/xen/Makefile +++ b/arch/x86/xen/Makefile @@ -20,5 +20,5 @@ obj-$(CONFIG_EVENT_TRACING) += trace.o obj-$(CONFIG_SMP) += smp.o obj-$(CONFIG_PARAVIRT_SPINLOCKS)+= spinlock.o obj-$(CONFIG_XEN_DEBUG_FS) += debugfs.o -obj-$(CONFIG_XEN_DOM0) += vga.o +obj-$(CONFIG_XEN_DOM0) += apic.o vga.o obj-$(CONFIG_SWIOTLB_XEN) += pci-swiotlb-xen.o diff --git a/arch/x86/xen/apic.c b/arch/x86/xen/apic.c new file mode 100644 index 0000000..c53b3ef --- /dev/null +++ b/arch/x86/xen/apic.c @@ -0,0 +1,17 @@ +#include <linux/init.h> +#include <asm/x86_init.h> + +unsigned int xen_io_apic_read(unsigned apic, unsigned reg) +{ + if (reg == 0x1) + return 0x00170020; + else if (reg == 0x0) + return 0x00000000; + + return 0xfd; +} + +void __init xen_init_apic(void) +{ + x86_apic.read = xen_io_apic_read; +} diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index 0732326..591ee69 100644 --- a/arch/x86/xen/enlighten.c +++ b/arch/x86/xen/enlighten.c @@ -1381,6 +1381,8 @@ asmlinkage void __init xen_start_kernel(void) pci_request_acs(); xen_acpi_sleep_register(); + + xen_init_apic(); } diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h index b095739..45c0c06 100644 --- a/arch/x86/xen/xen-ops.h +++ b/arch/x86/xen/xen-ops.h @@ -92,11 +92,15 @@ struct dom0_vga_console_info; #ifdef CONFIG_XEN_DOM0 void __init xen_init_vga(const struct dom0_vga_console_info *, size_t size); +void __init xen_init_apic(void); #else static inline void __init xen_init_vga(const struct dom0_vga_console_info *info, size_t size) { } +static inline void __init xen_init_apic(void) +{ +} #endif /* Declare an asm function, along with symbols needed to make it -- 1.7.7.5
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