summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel/acpi
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-18 17:39:57 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-18 17:39:57 +0000
commitdc50eab76b709d68175a358d6e23a5a3890764d3 (patch)
treec754d0390db060af0213ff994f0ac310e4cfd6e9 /arch/x86/kernel/acpi
parentAdding debian version 6.6.15-2. (diff)
downloadlinux-dc50eab76b709d68175a358d6e23a5a3890764d3.tar.xz
linux-dc50eab76b709d68175a358d6e23a5a3890764d3.zip
Merging upstream version 6.7.7.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/x86/kernel/acpi')
-rw-r--r--arch/x86/kernel/acpi/boot.c38
1 files changed, 17 insertions, 21 deletions
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index c55c0ef47a..85a3ce2a36 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -63,6 +63,7 @@ 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
@@ -233,6 +234,14 @@ acpi_parse_x2apic(union acpi_subtable_headers *header, const unsigned long end)
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
* cpus_possible_map more accurately, to permit
@@ -284,6 +293,7 @@ acpi_parse_lapic(union acpi_subtable_headers * header, const unsigned long end)
processor->processor_id, /* ACPI ID */
processor->lapic_flags & ACPI_MADT_ENABLED);
+ has_lapic_cpus = true;
return 0;
}
@@ -362,7 +372,7 @@ acpi_parse_lapic_nmi(union acpi_subtable_headers * header, const unsigned long e
}
#ifdef CONFIG_X86_64
-static int acpi_wakeup_cpu(int apicid, unsigned long start_ip)
+static int acpi_wakeup_cpu(u32 apicid, unsigned long start_ip)
{
/*
* Remap mailbox memory only for the first call to acpi_wakeup_cpu().
@@ -859,7 +869,7 @@ int acpi_unmap_cpu(int cpu)
set_apicid_to_node(per_cpu(x86_cpu_to_apicid, cpu), NUMA_NO_NODE);
#endif
- per_cpu(x86_cpu_to_apicid, cpu) = -1;
+ per_cpu(x86_cpu_to_apicid, cpu) = BAD_APICID;
set_cpu_present(cpu, false);
num_processors--;
@@ -1114,10 +1124,7 @@ 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;
- struct acpi_subtable_proc madt_proc[2];
+ int count, x2count = 0;
if (!boot_cpu_has(X86_FEATURE_APIC))
return -ENODEV;
@@ -1126,21 +1133,10 @@ static int __init acpi_parse_madt_lapic_entries(void)
acpi_parse_sapic, MAX_LOCAL_APIC);
if (!count) {
- memset(madt_proc, 0, sizeof(madt_proc));
- madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
- madt_proc[0].handler = acpi_parse_lapic;
- madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
- madt_proc[1].handler = acpi_parse_x2apic;
- ret = acpi_table_parse_entries_array(ACPI_SIG_MADT,
- sizeof(struct acpi_table_madt),
- madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
- if (ret < 0) {
- pr_err("Error parsing LAPIC/X2APIC entries\n");
- return ret;
- }
-
- count = madt_proc[0].count;
- x2count = madt_proc[1].count;
+ count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
+ acpi_parse_lapic, MAX_LOCAL_APIC);
+ x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
+ acpi_parse_x2apic, MAX_LOCAL_APIC);
}
if (!count && !x2count) {
pr_err("No LAPIC entries present\n");