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linux-sg2042/arch/x86/xen/apic.c

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xen/x86: Implement x86_apic_ops Or rather just implement one different function as opposed to the native one : the read function. We synthesize the values. Acked-by: Suresh Siddha <suresh.b.siddha@intel.com> [v1: Rebased on top of tip/x86/urgent] [v2: Return 0xfd instead of 0xff in the default case] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-03-21 06:53:10 +08:00
#include <linux/init.h>
x86/xen/apic: Add missing #include <xen/xen.h> This file depends on <xen/xen.h>, but the dependency was hidden due to: <asm/acpi.h> -> <asm/trampoline.h> -> <asm/io.h> -> <xen/xen.h> With the removal of <asm/trampoline.h>, this exposed the missing Cc: Len Brown <lenb@kernel.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Link: http://lkml.kernel.org/n/tip-7ccybvue6mw6wje3uxzzcglj@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-05-18 15:34:45 +08:00
xen/x86: Implement x86_apic_ops Or rather just implement one different function as opposed to the native one : the read function. We synthesize the values. Acked-by: Suresh Siddha <suresh.b.siddha@intel.com> [v1: Rebased on top of tip/x86/urgent] [v2: Return 0xfd instead of 0xff in the default case] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-03-21 06:53:10 +08:00
#include <asm/x86_init.h>
xen/apic: implement io apic read with hypercall Implements xen_io_apic_read with hypercall, so it returns proper IO-APIC information instead of fabricated one. Fallback to return an emulated IO_APIC values if hypercall fails. [v2: fallback to return an emulated IO_APIC values if hypercall fails] Signed-off-by: Lin Ming <mlin@ss.pku.edu.cn> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-05-01 00:16:27 +08:00
#include <asm/apic.h>
#include <asm/xen/hypercall.h>
xen/x86: Implement x86_apic_ops Or rather just implement one different function as opposed to the native one : the read function. We synthesize the values. Acked-by: Suresh Siddha <suresh.b.siddha@intel.com> [v1: Rebased on top of tip/x86/urgent] [v2: Return 0xfd instead of 0xff in the default case] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-03-21 06:53:10 +08:00
x86/xen/apic: Add missing #include <xen/xen.h> This file depends on <xen/xen.h>, but the dependency was hidden due to: <asm/acpi.h> -> <asm/trampoline.h> -> <asm/io.h> -> <xen/xen.h> With the removal of <asm/trampoline.h>, this exposed the missing Cc: Len Brown <lenb@kernel.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Link: http://lkml.kernel.org/n/tip-7ccybvue6mw6wje3uxzzcglj@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-05-18 15:34:45 +08:00
#include <xen/xen.h>
#include <xen/interface/physdev.h>
xen/apic/xenbus/swiotlb/pcifront/grant/tmem: Make functions or variables static. There is no need for those functions/variables to be visible. Make them static and also fix the compile warnings of this sort: drivers/xen/<some file>.c: warning: symbol '<blah>' was not declared. Should it be static? Some of them just require including the header file that declares the functions. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-08-22 02:49:34 +08:00
#include "xen-ops.h"
x86/xen/apic: Add missing #include <xen/xen.h> This file depends on <xen/xen.h>, but the dependency was hidden due to: <asm/acpi.h> -> <asm/trampoline.h> -> <asm/io.h> -> <xen/xen.h> With the removal of <asm/trampoline.h>, this exposed the missing Cc: Len Brown <lenb@kernel.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Cc: Jarkko Sakkinen <jarkko.sakkinen@intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Link: http://lkml.kernel.org/n/tip-7ccybvue6mw6wje3uxzzcglj@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-05-18 15:34:45 +08:00
xen/apic/xenbus/swiotlb/pcifront/grant/tmem: Make functions or variables static. There is no need for those functions/variables to be visible. Make them static and also fix the compile warnings of this sort: drivers/xen/<some file>.c: warning: symbol '<blah>' was not declared. Should it be static? Some of them just require including the header file that declares the functions. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-08-22 02:49:34 +08:00
static unsigned int xen_io_apic_read(unsigned apic, unsigned reg)
xen/x86: Implement x86_apic_ops Or rather just implement one different function as opposed to the native one : the read function. We synthesize the values. Acked-by: Suresh Siddha <suresh.b.siddha@intel.com> [v1: Rebased on top of tip/x86/urgent] [v2: Return 0xfd instead of 0xff in the default case] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-03-21 06:53:10 +08:00
{
xen/apic: implement io apic read with hypercall Implements xen_io_apic_read with hypercall, so it returns proper IO-APIC information instead of fabricated one. Fallback to return an emulated IO_APIC values if hypercall fails. [v2: fallback to return an emulated IO_APIC values if hypercall fails] Signed-off-by: Lin Ming <mlin@ss.pku.edu.cn> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-05-01 00:16:27 +08:00
struct physdev_apic apic_op;
int ret;
apic_op.apic_physbase = mpc_ioapic_addr(apic);
apic_op.reg = reg;
ret = HYPERVISOR_physdev_op(PHYSDEVOP_apic_read, &apic_op);
if (!ret)
return apic_op.value;
/* fallback to return an emulated IO_APIC values */
xen/x86: Implement x86_apic_ops Or rather just implement one different function as opposed to the native one : the read function. We synthesize the values. Acked-by: Suresh Siddha <suresh.b.siddha@intel.com> [v1: Rebased on top of tip/x86/urgent] [v2: Return 0xfd instead of 0xff in the default case] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-03-21 06:53:10 +08:00
if (reg == 0x1)
return 0x00170020;
else if (reg == 0x0)
return apic << 24;
return 0xfd;
}
void __init xen_init_apic(void)
{
x86_io_apic_ops.read = xen_io_apic_read;
}