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kernel-xen/xen-x86-no-lapic

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From: jbeulich@novell.com
Subject: Disallow all accesses to the local APIC page
Patch-mainline: obsolete
References: 191115
--- sle11sp1-2010-03-22.orig/arch/x86/include/asm/apic.h 2009-12-04 10:44:45.000000000 +0100
+++ sle11sp1-2010-03-22/arch/x86/include/asm/apic.h 2009-10-13 17:19:31.000000000 +0200
@@ -10,7 +10,9 @@
#include <asm/processor.h>
#include <asm/apicdef.h>
#include <asm/atomic.h>
+#ifndef CONFIG_XEN
#include <asm/fixmap.h>
+#endif
#include <asm/mpspec.h>
#include <asm/system.h>
#include <asm/msr.h>
@@ -49,6 +51,7 @@ static inline void generic_apic_probe(vo
#ifdef CONFIG_X86_LOCAL_APIC
extern unsigned int apic_verbosity;
+#ifndef CONFIG_XEN
extern int local_apic_timer_c2_ok;
extern int disable_apic;
@@ -121,6 +124,8 @@ extern u64 native_apic_icr_read(void);
extern int x2apic_mode;
+#endif /* CONFIG_XEN */
+
#ifdef CONFIG_X86_X2APIC
/*
* Make previous memory operations globally visible before
@@ -367,6 +372,8 @@ struct apic {
*/
extern struct apic *apic;
+#ifndef CONFIG_XEN
+
/*
* APIC functionality to boot other CPUs - only used on SMP:
*/
@@ -460,6 +467,8 @@ static inline void default_wait_for_init
extern void generic_bigsmp_probe(void);
+#endif /* CONFIG_XEN */
+
#ifdef CONFIG_X86_LOCAL_APIC
@@ -479,6 +488,8 @@ static inline const struct cpumask *defa
DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
+#ifndef CONFIG_XEN
+
static inline unsigned int read_apic_id(void)
{
unsigned int reg;
@@ -590,6 +601,8 @@ static inline physid_mask_t default_apic
return physid_mask_of_physid(phys_apicid);
}
+#endif /* CONFIG_XEN */
+
#endif /* CONFIG_X86_LOCAL_APIC */
#ifdef CONFIG_X86_32
--- sle11sp1-2010-03-22.orig/arch/x86/include/asm/apicdef.h 2010-03-22 12:07:53.000000000 +0100
+++ sle11sp1-2010-03-22/arch/x86/include/asm/apicdef.h 2009-10-14 17:01:50.000000000 +0200
@@ -11,6 +11,8 @@
#define IO_APIC_DEFAULT_PHYS_BASE 0xfec00000
#define APIC_DEFAULT_PHYS_BASE 0xfee00000
+#ifndef CONFIG_XEN
+
#define APIC_ID 0x20
#define APIC_LVR 0x30
@@ -136,6 +138,16 @@
#define APIC_BASE_MSR 0x800
#define X2APIC_ENABLE (1UL << 10)
+#else /* CONFIG_XEN */
+
+enum {
+ APIC_DEST_ALLBUT = 0x1,
+ APIC_DEST_SELF,
+ APIC_DEST_ALLINC
+};
+
+#endif /* CONFIG_XEN */
+
#ifdef CONFIG_X86_32
# define MAX_IO_APICS 64
#else
@@ -143,6 +155,8 @@
# define MAX_LOCAL_APIC 32768
#endif
+#ifndef CONFIG_XEN
+
/*
* All x86-64 systems are xAPIC compatible.
* In the following, "apicid" is a physical APIC ID.
@@ -413,6 +427,8 @@ struct local_apic {
#undef u32
+#endif /* CONFIG_XEN */
+
#ifdef CONFIG_X86_32
#define BAD_APICID 0xFFu
#else
--- sle11sp1-2010-03-22.orig/arch/x86/include/mach-xen/asm/fixmap.h 2009-11-06 10:52:22.000000000 +0100
+++ sle11sp1-2010-03-22/arch/x86/include/mach-xen/asm/fixmap.h 2009-10-13 17:19:31.000000000 +0200
@@ -17,7 +17,6 @@
#ifndef __ASSEMBLY__
#include <linux/kernel.h>
#include <asm/acpi.h>
-#include <asm/apicdef.h>
#include <asm/page.h>
#ifdef CONFIG_X86_32
#include <linux/threads.h>
@@ -82,10 +81,10 @@ enum fixed_addresses {
#endif
FIX_DBGP_BASE,
FIX_EARLYCON_MEM_BASE,
+#ifndef CONFIG_XEN
#ifdef CONFIG_X86_LOCAL_APIC
FIX_APIC_BASE, /* local (CPU) APIC) -- required for SMP or not */
#endif
-#ifndef CONFIG_XEN
#ifdef CONFIG_X86_IO_APIC
FIX_IO_APIC_BASE_0,
FIX_IO_APIC_BASE_END = FIX_IO_APIC_BASE_0 + MAX_IO_APICS - 1,
--- sle11sp1-2010-03-22.orig/arch/x86/include/mach-xen/asm/smp.h 2009-11-20 11:18:10.000000000 +0100
+++ sle11sp1-2010-03-22/arch/x86/include/mach-xen/asm/smp.h 2009-11-20 11:20:18.000000000 +0100
@@ -15,7 +15,7 @@
# include <asm/io_apic.h>
# endif
#endif
-#include <asm/thread_info.h>
+#include <linux/thread_info.h>
#include <asm/cpumask.h>
extern int smp_num_siblings;
@@ -168,7 +168,7 @@ extern unsigned disabled_cpus __cpuinitd
#include <asm/smp-processor-id.h>
-#ifdef CONFIG_X86_LOCAL_APIC
+#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_XEN)
#ifndef CONFIG_X86_64
static inline int logical_smp_processor_id(void)
--- sle11sp1-2010-03-22.orig/arch/x86/kernel/acpi/boot.c 2010-02-17 14:50:55.000000000 +0100
+++ sle11sp1-2010-03-22/arch/x86/kernel/acpi/boot.c 2010-02-18 15:30:28.000000000 +0100
@@ -72,13 +72,13 @@ int acpi_sci_override_gsi __initdata;
#ifndef CONFIG_XEN
int acpi_skip_timer_override __initdata;
int acpi_use_timer_override __initdata;
-#else
-#define acpi_skip_timer_override 0
-#endif
#ifdef CONFIG_X86_LOCAL_APIC
static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
#endif
+#else
+#define acpi_skip_timer_override 0
+#endif
#ifndef __HAVE_ARCH_CMPXCHG
#warning ACPI uses CMPXCHG, i486 and later hardware
@@ -137,6 +137,7 @@ static int __init acpi_parse_madt(struct
return -ENODEV;
}
+#ifndef CONFIG_XEN
if (madt->address) {
acpi_lapic_addr = (u64) madt->address;
@@ -144,7 +145,6 @@ static int __init acpi_parse_madt(struct
madt->address);
}
-#ifndef CONFIG_XEN
default_acpi_madt_oem_check(madt->header.oem_id,
madt->header.oem_table_id);
#endif
@@ -245,6 +245,7 @@ static int __init
acpi_parse_lapic_addr_ovr(struct acpi_subtable_header * header,
const unsigned long end)
{
+#ifndef CONFIG_XEN
struct acpi_madt_local_apic_override *lapic_addr_ovr = NULL;
lapic_addr_ovr = (struct acpi_madt_local_apic_override *)header;
@@ -253,6 +254,7 @@ acpi_parse_lapic_addr_ovr(struct acpi_su
return -EINVAL;
acpi_lapic_addr = lapic_addr_ovr->address;
+#endif
return 0;
}
@@ -1089,7 +1091,7 @@ int mp_register_gsi(struct device *dev,
ioapic_pin = mp_find_ioapic_pin(ioapic, gsi);
-#ifdef CONFIG_X86_32
+#if defined(CONFIG_X86_32) && !defined(CONFIG_XEN)
if (ioapic_renumber_irq)
gsi = ioapic_renumber_irq(ioapic, gsi);
#endif
--- sle11sp1-2010-03-22.orig/arch/x86/kernel/apic/io_apic-xen.c 2010-03-22 12:52:03.000000000 +0100
+++ sle11sp1-2010-03-22/arch/x86/kernel/apic/io_apic-xen.c 2010-03-22 12:59:10.000000000 +0100
@@ -1093,7 +1093,9 @@ static inline int irq_trigger(int idx)
return MPBIOS_trigger(idx);
}
+#ifndef CONFIG_XEN
int (*ioapic_renumber_irq)(int ioapic, int irq);
+#endif
static int pin_2_irq(int idx, int apic, int pin)
{
int irq, i;
@@ -1115,11 +1117,13 @@ static int pin_2_irq(int idx, int apic,
while (i < apic)
irq += nr_ioapic_registers[i++];
irq += pin;
+#ifndef CONFIG_XEN
/*
* For MPS mode, so far only needed by ES7000 platform
*/
if (ioapic_renumber_irq)
irq = ioapic_renumber_irq(apic, irq);
+#endif
}
#ifdef CONFIG_X86_32
@@ -4068,10 +4072,12 @@ int io_apic_set_pci_routing(struct devic
u8 __init io_apic_unique_id(u8 id)
{
#ifdef CONFIG_X86_32
+#ifndef CONFIG_XEN
if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) &&
!APIC_XAPIC(apic_version[boot_cpu_physical_apicid]))
return io_apic_get_unique_id(nr_ioapics, id);
else
+#endif
return id;
#else
int i;
--- sle11sp1-2010-03-22.orig/arch/x86/kernel/irq-xen.c 2010-01-07 11:22:50.000000000 +0100
+++ sle11sp1-2010-03-22/arch/x86/kernel/irq-xen.c 2009-12-18 10:14:24.000000000 +0100
@@ -15,9 +15,9 @@
#include <asm/mce.h>
#include <asm/hw_irq.h>
+#ifndef CONFIG_XEN
atomic_t irq_err_count;
-#ifndef CONFIG_XEN
/* Function pointer for generic interrupt vector handling */
void (*generic_interrupt_extension)(void) = NULL;
#endif
@@ -57,7 +57,7 @@ static int show_other_interrupts(struct
for_each_online_cpu(j)
seq_printf(p, "%10u ", irq_stats(j)->__nmi_count);
seq_printf(p, " Non-maskable interrupts\n");
-#ifdef CONFIG_X86_LOCAL_APIC
+#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_XEN)
seq_printf(p, "%*s: ", prec, "LOC");
for_each_online_cpu(j)
seq_printf(p, "%10u ", irq_stats(j)->apic_timer_irqs);
@@ -122,10 +122,12 @@ static int show_other_interrupts(struct
seq_printf(p, "%10u ", per_cpu(mce_poll_count, j));
seq_printf(p, " Machine check polls\n");
#endif
+#ifndef CONFIG_XEN
seq_printf(p, "%*s: %10u\n", prec, "ERR", atomic_read(&irq_err_count));
#if defined(CONFIG_X86_IO_APIC)
seq_printf(p, "%*s: %10u\n", prec, "MIS", atomic_read(&irq_mis_count));
#endif
+#endif
return 0;
}
@@ -221,12 +223,16 @@ u64 arch_irq_stat_cpu(unsigned int cpu)
u64 arch_irq_stat(void)
{
+#ifndef CONFIG_XEN
u64 sum = atomic_read(&irq_err_count);
#ifdef CONFIG_X86_IO_APIC
sum += atomic_read(&irq_mis_count);
#endif
return sum;
+#else
+ return 0;
+#endif
}
--- sle11sp1-2010-03-22.orig/arch/x86/kernel/mpparse-xen.c 2010-03-01 14:45:20.000000000 +0100
+++ sle11sp1-2010-03-22/arch/x86/kernel/mpparse-xen.c 2010-03-01 14:47:29.000000000 +0100
@@ -288,7 +288,9 @@ static int __init smp_check_mpc(struct m
printk(KERN_INFO "MPTABLE: Product ID: %s\n", str);
+#ifndef CONFIG_XEN
printk(KERN_INFO "MPTABLE: APIC at: 0x%X\n", mpc->lapic);
+#endif
return 1;
}
@@ -320,12 +322,14 @@ static int __init smp_read_mpc(struct mp
if (!smp_check_mpc(mpc, oem, str))
return 0;
-#if defined(CONFIG_X86_32) && !defined(CONFIG_XEN)
+#ifndef CONFIG_XEN
+#ifdef CONFIG_X86_32
generic_mps_oem_check(mpc, oem, str);
#endif
/* save the local APIC address, it might be non-default */
if (!acpi_lapic)
mp_lapic_addr = mpc->lapic;
+#endif
if (early)
return 1;
@@ -512,10 +516,12 @@ static inline void __init construct_defa
int linttypes[2] = { mp_ExtINT, mp_NMI };
int i;
+#ifndef CONFIG_XEN
/*
* local APIC has default address
*/
mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
+#endif
/*
* 2 CPUs, numbered 0 & 1.
@@ -648,10 +654,12 @@ void __init default_get_smp_config(unsig
*/
if (mpf->feature1 != 0) {
if (early) {
+#ifndef CONFIG_XEN
/*
* local APIC has default address
*/
mp_lapic_addr = APIC_DEFAULT_PHYS_BASE;
+#endif
return;
}
--- sle11sp1-2010-03-22.orig/drivers/xen/core/smpboot.c 2010-03-22 12:57:50.000000000 +0100
+++ sle11sp1-2010-03-22/drivers/xen/core/smpboot.c 2010-03-22 12:59:04.000000000 +0100
@@ -362,7 +362,7 @@ void __init smp_prepare_cpus(unsigned in
* Here we can be sure that there is an IO-APIC in the system. Let's
* go and set it up:
*/
- if (!skip_ioapic_setup && nr_ioapics)
+ if (cpu_has_apic && !skip_ioapic_setup && nr_ioapics)
setup_IO_APIC();
#endif
}
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