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Diffstat (limited to 'arch/x86/kernel/acpi/boot.c')
-rw-r--r--arch/x86/kernel/acpi/boot.c247
1 files changed, 167 insertions, 80 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index e55e0c1fad8c..9fa321a95eb3 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -23,6 +23,8 @@
#include <linux/serial_core.h>
#include <linux/pgtable.h>
+#include <xen/xen.h>
+
#include <asm/e820/api.h>
#include <asm/irqdomain.h>
#include <asm/pci_x86.h>
@@ -52,6 +54,7 @@ int acpi_lapic;
int acpi_ioapic;
int acpi_strict;
int acpi_disable_cmcff;
+bool acpi_int_src_ovr[NR_IRQS_LEGACY];
/* ACPI SCI override configuration */
u8 acpi_sci_flags __initdata;
@@ -62,6 +65,8 @@ int acpi_fix_pin2_polarity __initdata;
#ifdef CONFIG_X86_LOCAL_APIC
static u64 acpi_lapic_addr __initdata = APIC_DEFAULT_PHYS_BASE;
+static bool has_lapic_cpus __initdata;
+static bool acpi_support_online_capable;
#endif
#ifdef CONFIG_X86_IO_APIC
@@ -139,43 +144,31 @@ static int __init acpi_parse_madt(struct acpi_table_header *table)
pr_debug("Local APIC address 0x%08x\n", madt->address);
}
+ if (madt->flags & ACPI_MADT_PCAT_COMPAT)
+ legacy_pic_pcat_compat();
+
+ /* ACPI 6.3 and newer support the online capable bit. */
+ if (acpi_gbl_FADT.header.revision > 6 ||
+ (acpi_gbl_FADT.header.revision == 6 &&
+ acpi_gbl_FADT.minor_revision >= 3))
+ acpi_support_online_capable = true;
+
default_acpi_madt_oem_check(madt->header.oem_id,
madt->header.oem_table_id);
return 0;
}
-/**
- * acpi_register_lapic - register a local apic and generates a logic cpu number
- * @id: local apic id to register
- * @acpiid: ACPI id to register
- * @enabled: this cpu is enabled or not
- *
- * Returns the logic cpu number which maps to the local apic
- */
-static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
+static bool __init acpi_is_processor_usable(u32 lapic_flags)
{
- unsigned int ver = 0;
- int cpu;
-
- if (id >= MAX_LOCAL_APIC) {
- pr_info("skipped apicid that is too big\n");
- return -EINVAL;
- }
-
- if (!enabled) {
- ++disabled_cpus;
- return -EINVAL;
- }
+ if (lapic_flags & ACPI_MADT_ENABLED)
+ return true;
- if (boot_cpu_physical_apicid != -1U)
- ver = boot_cpu_apic_version;
+ if (!acpi_support_online_capable ||
+ (lapic_flags & ACPI_MADT_ONLINE_CAPABLE))
+ return true;
- cpu = generic_processor_info(id, ver);
- if (cpu >= 0)
- early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
-
- return cpu;
+ return false;
}
static int __init
@@ -202,6 +195,18 @@ acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end)
if (apic_id == 0xffffffff)
return 0;
+ /* don't register processors that cannot be onlined */
+ if (!acpi_is_processor_usable(processor->lapic_flags))
+ return 0;
+
+ /*
+ * According to https://uefi.org/specs/ACPI/6.5/05_ACPI_Software_Programming_Model.html#processor-local-x2apic-structure
+ * when MADT provides both valid LAPIC and x2APIC entries, the APIC ID
+ * in x2APIC must be equal or greater than 0xff.
+ */
+ if (has_lapic_cpus && apic_id < 0xff)
+ return 0;
+
/*
* We need to register disabled CPU as well to permit
* counting disabled CPUs. This allows us to size
@@ -209,13 +214,13 @@ acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end)
* to not preallocating memory for all NR_CPUS
* when we use CPU hotplug.
*/
- if (!apic->apic_id_valid(apic_id)) {
+ if (!apic_id_valid(apic_id)) {
if (enabled)
pr_warn("x2apic entry ignored\n");
return 0;
}
- acpi_register_lapic(apic_id, processor->uid, enabled);
+ topology_register_apic(apic_id, processor->uid, enabled);
#else
pr_warn("x2apic entry ignored\n");
#endif
@@ -224,6 +229,28 @@ acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end)
}
static int __init
+acpi_check_lapic(union acpi_subtable_headers *header, const unsigned long end)
+{
+ struct acpi_madt_local_apic *processor = NULL;
+
+ processor = (struct acpi_madt_local_apic *)header;
+
+ if (BAD_MADT_ENTRY(processor, end))
+ return -EINVAL;
+
+ /* Ignore invalid ID */
+ if (processor->id == 0xff)
+ return 0;
+
+ /* Ignore processors that can not be onlined */
+ if (!acpi_is_processor_usable(processor->lapic_flags))
+ return 0;
+
+ has_lapic_cpus = true;
+ return 0;
+}
+
+static int __init
acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end)
{
struct acpi_madt_local_apic *processor = NULL;
@@ -239,6 +266,10 @@ acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end)
if (processor->id == 0xff)
return 0;
+ /* don't register processors that can not be onlined */
+ if (!acpi_is_processor_usable(processor->lapic_flags))
+ return 0;
+
/*
* We need to register disabled CPU as well to permit
* counting disabled CPUs. This allows us to size
@@ -246,9 +277,9 @@ acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end)
* to not preallocating memory for all NR_CPUS
* when we use CPU hotplug.
*/
- acpi_register_lapic(processor->id, /* APIC ID */
- processor->processor_id, /* ACPI ID */
- processor->lapic_flags & ACPI_MADT_ENABLED);
+ topology_register_apic(processor->id, /* APIC ID */
+ processor->processor_id, /* ACPI ID */
+ processor->lapic_flags & ACPI_MADT_ENABLED);
return 0;
}
@@ -265,9 +296,9 @@ acpi_parse_sapic(union acpi_subtable_headers *header, const unsigned long end)
acpi_table_print_madt_entry(&header->common);
- acpi_register_lapic((processor->id << 8) | processor->eid,/* APIC ID */
- processor->processor_id, /* ACPI ID */
- processor->lapic_flags & ACPI_MADT_ENABLED);
+ topology_register_apic((processor->id << 8) | processor->eid,/* APIC ID */
+ processor->processor_id, /* ACPI ID */
+ processor->lapic_flags & ACPI_MADT_ENABLED);
return 0;
}
@@ -326,8 +357,7 @@ acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long e
return 0;
}
-
-#endif /*CONFIG_X86_LOCAL_APIC */
+#endif /* CONFIG_X86_LOCAL_APIC */
#ifdef CONFIG_X86_IO_APIC
#define MP_ISA_BUS 0
@@ -366,7 +396,7 @@ static void __init mp_override_legacy_irq(u8 bus_irq, u8 polarity, u8 trigger,
isa_irq_to_gsi[bus_irq] = gsi;
}
-static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
+static void mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
int polarity)
{
#ifdef CONFIG_X86_MPPARSE
@@ -378,9 +408,9 @@ static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
u8 pin;
if (!acpi_ioapic)
- return 0;
+ return;
if (!dev || !dev_is_pci(dev))
- return 0;
+ return;
pdev = to_pci_dev(dev);
number = pdev->bus->number;
@@ -399,7 +429,6 @@ static int mp_config_acpi_gsi(struct device *dev, u32 gsi, int trigger,
mp_save_irq(&mp_irq);
#endif
- return 0;
}
static int __init mp_register_ioapic_irq(u8 bus_irq, u8 polarity,
@@ -502,6 +531,9 @@ acpi_parse_int_src_ovr(union acpi_subtable_headers * header,
acpi_table_print_madt_entry(&header->common);
+ if (intsrc->source_irq < NR_IRQS_LEGACY)
+ acpi_int_src_ovr[intsrc->source_irq] = true;
+
if (intsrc->source_irq == acpi_gbl_FADT.sci_interrupt) {
acpi_sci_ioapic_setup(intsrc->source_irq,
intsrc->inti_flags & ACPI_MADT_POLARITY_MASK,
@@ -558,10 +590,10 @@ acpi_parse_nmi_src(union acpi_subtable_headers * header, const unsigned long end
* If a PIC-mode SCI is not recognized or gives spurious IRQ7's
* it may require Edge Trigger -- use "acpi_sci=edge"
*
- * Port 0x4d0-4d1 are ECLR1 and ECLR2, the Edge/Level Control Registers
+ * Port 0x4d0-4d1 are ELCR1 and ELCR2, the Edge/Level Control Registers
* for the 8259 PIC. bit[n] = 1 means irq[n] is Level, otherwise Edge.
- * ECLR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
- * ECLR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
+ * ELCR1 is IRQs 0-7 (IRQ 0, 1, 2 must be 0)
+ * ELCR2 is IRQs 8-15 (IRQ 8, 13 must be 0)
*/
void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
@@ -570,7 +602,7 @@ void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
unsigned int old, new;
/* Real old ELCR mask */
- old = inb(0x4d0) | (inb(0x4d1) << 8);
+ old = inb(PIC_ELCR1) | (inb(PIC_ELCR2) << 8);
/*
* If we use ACPI to set PCI IRQs, then we should clear ELCR
@@ -596,8 +628,8 @@ void __init acpi_pic_sci_set_trigger(unsigned int irq, u16 trigger)
return;
pr_warn("setting ELCR to %04x (from %04x)\n", new, old);
- outb(new, 0x4d0);
- outb(new >> 8, 0x4d1);
+ outb(new, PIC_ELCR1);
+ outb(new >> 8, PIC_ELCR2);
}
int acpi_gsi_to_irq(u32 gsi, unsigned int *irqp)
@@ -745,12 +777,10 @@ static int acpi_map_cpu2node(acpi_handle handle, int cpu, int physid)
return 0;
}
-int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id,
- int *pcpu)
+int acpi_map_cpu(acpi_handle handle, phys_cpuid_t physid, u32 acpi_id, int *pcpu)
{
- int cpu;
+ int cpu = topology_hotplug_apic(physid, acpi_id);
- cpu = acpi_register_lapic(physid, acpi_id, ACPI_MADT_ENABLED);
if (cpu < 0) {
pr_info("Unable to map lapic to logical cpu number\n");
return cpu;
@@ -769,15 +799,11 @@ int acpi_unmap_cpu(int cpu)
#ifdef CONFIG_ACPI_NUMA
set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
#endif
-
- per_cpu(x86_cpu_to_apicid, cpu) = -1;
- set_cpu_present(cpu, false);
- num_processors--;
-
- return (0);
+ topology_hotunplug_apic(cpu);
+ return 0;
}
EXPORT_SYMBOL(acpi_unmap_cpu);
-#endif /* CONFIG_ACPI_HOTPLUG_CPU */
+#endif /* CONFIG_ACPI_HOTPLUG_CPU */
int acpi_register_ioapic(acpi_handle handle, u64 phys_addr, u32 gsi_base)
{
@@ -908,11 +934,8 @@ static int __init acpi_parse_hpet(struct acpi_table_header *table)
* the resource tree during the lateinit timeframe.
*/
#define HPET_RESOURCE_NAME_SIZE 9
- hpet_res = memblock_alloc(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE,
+ hpet_res = memblock_alloc_or_panic(sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE,
SMP_CACHE_BYTES);
- if (!hpet_res)
- panic("%s: Failed to allocate %zu bytes\n", __func__,
- sizeof(*hpet_res) + HPET_RESOURCE_NAME_SIZE);
hpet_res->name = (void *)&hpet_res[1];
hpet_res->flags = IORESOURCE_MEM;
@@ -1025,10 +1048,9 @@ static int __init early_acpi_parse_madt_lapic_addr_ovr(void)
static int __init acpi_parse_madt_lapic_entries(void)
{
- int count;
- int x2count = 0;
- int ret;
+ int count, x2count = 0;
struct acpi_subtable_proc madt_proc[2];
+ int ret;
if (!boot_cpu_has(X86_FEATURE_APIC))
return -ENODEV;
@@ -1037,6 +1059,13 @@ static int __init acpi_parse_madt_lapic_entries(void)
acpi_parse_sapic, MAX_LOCAL_APIC);
if (!count) {
+ /* Check if there are valid LAPIC entries */
+ acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC, acpi_check_lapic, MAX_LOCAL_APIC);
+
+ /*
+ * Enumerate the APIC IDs in the order that they appear in the
+ * MADT, no matter LAPIC entry or x2APIC entry is used.
+ */
memset(madt_proc, 0, sizeof(madt_proc));
madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
madt_proc[0].handler = acpi_parse_lapic;
@@ -1049,7 +1078,6 @@ static int __init acpi_parse_madt_lapic_entries(void)
pr_err("Error parsing LAPIC/X2APIC entries\n");
return ret;
}
-
count = madt_proc[0].count;
x2count = madt_proc[1].count;
}
@@ -1166,7 +1194,7 @@ static int __init acpi_parse_madt_ioapic_entries(void)
/*
* if "noapic" boot option, don't look for IO-APICs
*/
- if (skip_ioapic_setup) {
+ if (ioapic_is_disabled) {
pr_info("Skipping IOAPIC probe due to 'noapic' option.\n");
return -ENODEV;
}
@@ -1182,7 +1210,8 @@ static int __init acpi_parse_madt_ioapic_entries(void)
}
count = acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
- acpi_parse_int_src_ovr, nr_irqs);
+ acpi_parse_int_src_ovr,
+ irq_get_nr_irqs());
if (count < 0) {
pr_err("Error parsing interrupt source overrides entry\n");
/* TBD: Cleanup to allow fallback to MPS */
@@ -1202,7 +1231,8 @@ static int __init acpi_parse_madt_ioapic_entries(void)
mp_config_acpi_legacy_irqs();
count = acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE,
- acpi_parse_nmi_src, nr_irqs);
+ acpi_parse_nmi_src,
+ irq_get_nr_irqs());
if (count < 0) {
pr_err("Error parsing NMI SRC entry\n");
/* TBD: Cleanup to allow fallback to MPS */
@@ -1269,6 +1299,14 @@ static void __init acpi_process_madt(void)
smp_found_config = 1;
}
+
+#ifdef CONFIG_ACPI_MADT_WAKEUP
+ /*
+ * Parse MADT MP Wake entry.
+ */
+ acpi_table_parse_madt(ACPI_MADT_TYPE_MULTIPROC_WAKEUP,
+ acpi_parse_mp_wake, 1);
+#endif
}
if (error == -EINVAL) {
/*
@@ -1319,6 +1357,17 @@ static int __init disable_acpi_pci(const struct dmi_system_id *d)
return 0;
}
+static int __init disable_acpi_xsdt(const struct dmi_system_id *d)
+{
+ if (!acpi_force) {
+ pr_notice("%s detected: force use of acpi=rsdt\n", d->ident);
+ acpi_gbl_do_not_use_xsdt = TRUE;
+ } else {
+ pr_notice("Warning: DMI blacklist says broken, but acpi XSDT forced\n");
+ }
+ return 0;
+}
+
static int __init dmi_disable_acpi(const struct dmi_system_id *d)
{
if (!acpi_force) {
@@ -1442,6 +1491,19 @@ static const struct dmi_system_id acpi_dmi_table[] __initconst = {
DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"),
},
},
+ /*
+ * Boxes that need ACPI XSDT use disabled due to corrupted tables
+ */
+ {
+ .callback = disable_acpi_xsdt,
+ .ident = "Advantech DAC-BJ01",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "NEC"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Bearlake CRB Board"),
+ DMI_MATCH(DMI_BIOS_VERSION, "V1.12"),
+ DMI_MATCH(DMI_BIOS_DATE, "02/01/2011"),
+ },
+ },
{}
};
@@ -1669,6 +1731,15 @@ int __init acpi_mps_check(void)
{
#if defined(CONFIG_X86_LOCAL_APIC) && !defined(CONFIG_X86_MPPARSE)
/* mptable code is not built-in*/
+
+ /*
+ * Xen disables ACPI in PV DomU guests but it still emulates APIC and
+ * supports SMP. Returning early here ensures that APIC is not disabled
+ * unnecessarily and the guest is not limited to a single vCPU.
+ */
+ if (xen_pv_domain() && !xen_initial_domain())
+ return 0;
+
if (acpi_disabled || acpi_noirq) {
pr_warn("MPS support code is not built-in, using acpi=off or acpi=noirq or pci=noacpi may have problem\n");
return 1;
@@ -1718,28 +1789,33 @@ early_param("acpi_sci", setup_acpi_sci);
int __acpi_acquire_global_lock(unsigned int *lock)
{
unsigned int old, new, val;
+
+ old = READ_ONCE(*lock);
do {
- old = *lock;
- new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
- val = cmpxchg(lock, old, new);
- } while (unlikely (val != old));
- return ((new & 0x3) < 3) ? -1 : 0;
+ val = (old >> 1) & 0x1;
+ new = (old & ~0x3) + 2 + val;
+ } while (!try_cmpxchg(lock, &old, new));
+
+ if (val)
+ return 0;
+
+ return -1;
}
int __acpi_release_global_lock(unsigned int *lock)
{
- unsigned int old, new, val;
+ unsigned int old, new;
+
+ old = READ_ONCE(*lock);
do {
- old = *lock;
new = old & ~0x3;
- val = cmpxchg(lock, old, new);
- } while (unlikely (val != old));
+ } while (!try_cmpxchg(lock, &old, new));
return old & 0x1;
}
void __init arch_reserve_mem_area(acpi_physical_address addr, size_t size)
{
- e820__range_add(addr, size, E820_TYPE_ACPI);
+ e820__range_add(addr, size, E820_TYPE_NVS);
e820__update_table_print();
}
@@ -1752,3 +1828,14 @@ u64 x86_default_get_root_pointer(void)
{
return boot_params.acpi_rsdp_addr;
}
+
+#ifdef CONFIG_XEN_PV
+void __iomem *x86_acpi_os_ioremap(acpi_physical_address phys, acpi_size size)
+{
+ return ioremap_cache(phys, size);
+}
+
+void __iomem * (*acpi_os_ioremap)(acpi_physical_address phys, acpi_size size) =
+ x86_acpi_os_ioremap;
+EXPORT_SYMBOL_GPL(acpi_os_ioremap);
+#endif
generated by cgit (git 2.34.1) at 2025-12-24 19:40:13 +0000