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Merge branch 'stable/for-ingo-v3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen into x86/apic

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This commit is contained in:
Ingo Molnar 2012-05-07 12:07:51 +02:00
commit 22042c086c
10 changed files with 82 additions and 60 deletions
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35
arch/x86/include/asm/io_apic.h
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@ -5,7 +5,7 @@
#include <asm/mpspec.h>
#include <asm/apicdef.h>
#include <asm/irq_vectors.h>
#include <asm/x86_init.h>
/*
* Intel IO-APIC support for SMP and UP systems.
*
@ -21,15 +21,6 @@
#define IO_APIC_REDIR_LEVEL_TRIGGER (1 << 15)
#define IO_APIC_REDIR_MASKED (1 << 16)
struct io_apic_ops {
void (*init) (void);
unsigned int (*read) (unsigned int apic, unsigned int reg);
void (*write) (unsigned int apic, unsigned int reg, unsigned int value);
void (*modify)(unsigned int apic, unsigned int reg, unsigned int value);
};
void __init set_io_apic_ops(const struct io_apic_ops *);
/*
* The structure of the IO-APIC:
*/
@ -156,7 +147,6 @@ struct io_apic_irq_attr;
extern int io_apic_set_pci_routing(struct device *dev, int irq,
struct io_apic_irq_attr *irq_attr);
void setup_IO_APIC_irq_extra(u32 gsi);
extern void ioapic_and_gsi_init(void);
extern void ioapic_insert_resources(void);
int io_apic_setup_irq_pin_once(unsigned int irq, int node, struct io_apic_irq_attr *attr);
@ -185,12 +175,29 @@ extern void mp_save_irq(struct mpc_intsrc *m);
extern void disable_ioapic_support(void);
extern void __init native_io_apic_init_mappings(void);
extern unsigned int native_io_apic_read(unsigned int apic, unsigned int reg);
extern void native_io_apic_write(unsigned int apic, unsigned int reg, unsigned int val);
extern void native_io_apic_modify(unsigned int apic, unsigned int reg, unsigned int val);
static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg)
{
return x86_io_apic_ops.read(apic, reg);
}
static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned int value)
{
x86_io_apic_ops.write(apic, reg, value);
}
static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value)
{
x86_io_apic_ops.modify(apic, reg, value);
}
#else /* !CONFIG_X86_IO_APIC */
#define io_apic_assign_pci_irqs 0
#define setup_ioapic_ids_from_mpc x86_init_noop
static const int timer_through_8259 = 0;
static inline void ioapic_and_gsi_init(void) { }
static inline void ioapic_insert_resources(void) { }
#define gsi_top (NR_IRQS_LEGACY)
static inline int mp_find_ioapic(u32 gsi) { return 0; }
@ -212,6 +219,10 @@ static inline int restore_ioapic_entries(void)
static inline void mp_save_irq(struct mpc_intsrc *m) { };
static inline void disable_ioapic_support(void) { }
#define native_io_apic_init_mappings NULL
#define native_io_apic_read NULL
#define native_io_apic_write NULL
#define native_io_apic_modify NULL
#endif
#endif /* _ASM_X86_IO_APIC_H */

9
arch/x86/include/asm/x86_init.h
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@ -188,11 +188,18 @@ struct x86_msi_ops {
void (*restore_msi_irqs)(struct pci_dev *dev, int irq);
};
struct x86_io_apic_ops {
void (*init) (void);
unsigned int (*read) (unsigned int apic, unsigned int reg);
void (*write) (unsigned int apic, unsigned int reg, unsigned int value);
void (*modify)(unsigned int apic, unsigned int reg, unsigned int value);
};
extern struct x86_init_ops x86_init;
extern struct x86_cpuinit_ops x86_cpuinit;
extern struct x86_platform_ops x86_platform;
extern struct x86_msi_ops x86_msi;
extern struct x86_io_apic_ops x86_io_apic_ops;
extern void x86_init_noop(void);
extern void x86_init_uint_noop(unsigned int unused);

46
arch/x86/kernel/apic/io_apic.c
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@ -68,24 +68,6 @@
#define for_each_irq_pin(entry, head) \
for (entry = head; entry; entry = entry->next)
static void __init __ioapic_init_mappings(void);
static unsigned int __io_apic_read (unsigned int apic, unsigned int reg);
static void __io_apic_write (unsigned int apic, unsigned int reg, unsigned int val);
static void __io_apic_modify(unsigned int apic, unsigned int reg, unsigned int val);
static struct io_apic_ops io_apic_ops = {
.init = __ioapic_init_mappings,
.read = __io_apic_read,
.write = __io_apic_write,
.modify = __io_apic_modify,
};
void __init set_io_apic_ops(const struct io_apic_ops *ops)
{
io_apic_ops = *ops;
}
/*
* Is the SiS APIC rmw bug present ?
* -1 = don't know, 0 = no, 1 = yes
@ -313,21 +295,6 @@ static void free_irq_at(unsigned int at, struct irq_cfg *cfg)
irq_free_desc(at);
}
static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg)
{
return io_apic_ops.read(apic, reg);
}
static inline void io_apic_write(unsigned int apic, unsigned int reg, unsigned int value)
{
io_apic_ops.write(apic, reg, value);
}
static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value)
{
io_apic_ops.modify(apic, reg, value);
}
struct io_apic {
unsigned int index;
@ -349,14 +316,14 @@ static inline void io_apic_eoi(unsigned int apic, unsigned int vector)
writel(vector, &io_apic->eoi);
}
static unsigned int __io_apic_read(unsigned int apic, unsigned int reg)
unsigned int native_io_apic_read(unsigned int apic, unsigned int reg)
{
struct io_apic __iomem *io_apic = io_apic_base(apic);
writel(reg, &io_apic->index);
return readl(&io_apic->data);
}
static void __io_apic_write(unsigned int apic, unsigned int reg, unsigned int value)
void native_io_apic_write(unsigned int apic, unsigned int reg, unsigned int value)
{
struct io_apic __iomem *io_apic = io_apic_base(apic);
@ -370,7 +337,7 @@ static void __io_apic_write(unsigned int apic, unsigned int reg, unsigned int va
*
* Older SiS APIC requires we rewrite the index register
*/
static void __io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value)
void native_io_apic_modify(unsigned int apic, unsigned int reg, unsigned int value)
{
struct io_apic __iomem *io_apic = io_apic_base(apic);
@ -3931,12 +3898,7 @@ static struct resource * __init ioapic_setup_resources(int nr_ioapics)
return res;
}
void __init ioapic_and_gsi_init(void)
{
io_apic_ops.init();
}
static void __init __ioapic_init_mappings(void)
void __init native_io_apic_init_mappings(void)
{
unsigned long ioapic_phys, idx = FIX_IO_APIC_BASE_0;
struct resource *ioapic_res;

2
arch/x86/kernel/setup.c
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@ -1012,7 +1012,7 @@ void __init setup_arch(char **cmdline_p)
init_cpu_to_node();
init_apic_mappings();
ioapic_and_gsi_init();
x86_io_apic_ops.init();
kvm_guest_init();

8
arch/x86/kernel/x86_init.c
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@ -18,6 +18,7 @@
#include <asm/e820.h>
#include <asm/time.h>
#include <asm/irq.h>
#include <asm/io_apic.h>
#include <asm/pat.h>
#include <asm/tsc.h>
#include <asm/iommu.h>
@ -119,3 +120,10 @@ struct x86_msi_ops x86_msi = {
.teardown_msi_irqs = default_teardown_msi_irqs,
.restore_msi_irqs = default_restore_msi_irqs,
};
struct x86_io_apic_ops x86_io_apic_ops = {
.init = native_io_apic_init_mappings,
.read = native_io_apic_read,
.write = native_io_apic_write,
.modify = native_io_apic_modify,
};

2
arch/x86/xen/Makefile
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@ -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

30
arch/x86/xen/apic.c Normal file
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@ -0,0 +1,30 @@
#include <linux/init.h>
#include <asm/x86_init.h>
#include <asm/apic.h>
#include <xen/interface/physdev.h>
#include <asm/xen/hypercall.h>
unsigned int xen_io_apic_read(unsigned apic, unsigned reg)
{
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 */
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;
}

2
arch/x86/xen/enlighten.c
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@ -1362,6 +1362,8 @@ asmlinkage void __init xen_start_kernel(void)
xen_start_info->console.domU.mfn = 0;
xen_start_info->console.domU.evtchn = 0;
xen_init_apic();
/* Make sure ACS will be enabled */
pci_request_acs();
}

4
arch/x86/xen/mmu.c
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@ -1859,7 +1859,6 @@ pgd_t * __init xen_setup_kernel_pagetable(pgd_t *pgd,
#endif /* CONFIG_X86_64 */
static unsigned char dummy_mapping[PAGE_SIZE] __page_aligned_bss;
static unsigned char fake_ioapic_mapping[PAGE_SIZE] __page_aligned_bss;
static void xen_set_fixmap(unsigned idx, phys_addr_t phys, pgprot_t prot)
{
@ -1900,7 +1899,7 @@ static void xen_set_fixmap(unsigned idx, phys_addr_t phys, pgprot_t prot)
* We just don't map the IO APIC - all access is via
* hypercalls. Keep the address in the pte for reference.
*/
pte = pfn_pte(PFN_DOWN(__pa(fake_ioapic_mapping)), PAGE_KERNEL);
pte = pfn_pte(PFN_DOWN(__pa(dummy_mapping)), PAGE_KERNEL);
break;
#endif
@ -2065,7 +2064,6 @@ void __init xen_init_mmu_ops(void)
pv_mmu_ops = xen_mmu_ops;
memset(dummy_mapping, 0xff, PAGE_SIZE);
memset(fake_ioapic_mapping, 0xfd, PAGE_SIZE);
}
/* Protected by xen_reservation_lock. */

4
arch/x86/xen/xen-ops.h
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@ -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