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Message-ID: <20230717223223.737031480@linutronix.de>
Date: Tue, 18 Jul 2023 01:14:51 +0200 (CEST)
From: Thomas Gleixner <tglx@...utronix.de>
To: LKML <linux-kernel@...r.kernel.org>
Cc: x86@...nel.org, Linus Torvalds <torvalds@...ux-foundation.org>,
Andrew Cooper <andrew.cooper3@...rix.com>,
Tom Lendacky <thomas.lendacky@....com>,
Paolo Bonzini <pbonzini@...hat.com>,
Wei Liu <wei.liu@...nel.org>,
Arjan van de Ven <arjan@...ux.intel.com>,
Juergen Gross <jgross@...e.com>
Subject: [patch 11/58] x86/apic: Remove the pointless APIC version check
This historical leftover is really uninteresting today. Whatever MPTABLE or
MADT delivers we only trust the hardware anyway.
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
arch/x86/include/asm/mpspec.h | 2 +-
arch/x86/kernel/acpi/boot.c | 6 +-----
arch/x86/kernel/apic/apic.c | 19 ++++---------------
arch/x86/kernel/devicetree.c | 5 ++---
arch/x86/kernel/jailhouse.c | 6 ++----
arch/x86/kernel/mpparse.c | 2 +-
arch/x86/kernel/smpboot.c | 4 ++--
7 files changed, 13 insertions(+), 31 deletions(-)
--- a/arch/x86/include/asm/mpspec.h
+++ b/arch/x86/include/asm/mpspec.h
@@ -76,7 +76,7 @@ static inline void e820__memblock_alloc_
#define default_get_smp_config x86_init_uint_noop
#endif
-int generic_processor_info(int apicid, int version);
+int generic_processor_info(int apicid);
#define PHYSID_ARRAY_SIZE BITS_TO_LONGS(MAX_LOCAL_APIC)
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -169,7 +169,6 @@ static int __init acpi_parse_madt(struct
*/
static int acpi_register_lapic(int id, u32 acpiid, u8 enabled)
{
- unsigned int ver = 0;
int cpu;
if (id >= MAX_LOCAL_APIC) {
@@ -182,10 +181,7 @@ static int acpi_register_lapic(int id, u
return -EINVAL;
}
- if (boot_cpu_physical_apicid != -1U)
- ver = boot_cpu_apic_version;
-
- cpu = generic_processor_info(id, ver);
+ cpu = generic_processor_info(id);
if (cpu >= 0)
early_per_cpu(x86_cpu_to_acpiid, cpu) = acpiid;
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -2428,19 +2428,8 @@ static int allocate_logical_cpuid(int ap
return nr_logical_cpuids++;
}
-static void cpu_update_apic(int cpu, int apicid, int version)
+static void cpu_update_apic(int cpu, int apicid)
{
- if (version == 0x0) {
- pr_warn("BIOS bug: APIC version is 0 for CPU %d/0x%x, fixing up to 0x10\n",
- cpu, apicid);
- version = 0x10;
- }
-
- if (version != boot_cpu_apic_version) {
- pr_warn("BIOS bug: APIC version mismatch, boot CPU: %x, CPU %d: version %x\n",
- boot_cpu_apic_version, cpu, version);
- }
-
#if defined(CONFIG_SMP) || defined(CONFIG_X86_64)
early_per_cpu(x86_cpu_to_apicid, cpu) = apicid;
#endif
@@ -2460,10 +2449,10 @@ static void cpu_update_apic(int cpu, int
static __init void cpu_set_boot_apic(void)
{
cpuid_to_apicid[0] = boot_cpu_physical_apicid;
- cpu_update_apic(0, boot_cpu_physical_apicid, boot_cpu_apic_version);
+ cpu_update_apic(0, boot_cpu_physical_apicid);
}
-int generic_processor_info(int apicid, int version)
+int generic_processor_info(int apicid)
{
int cpu, max = nr_cpu_ids;
@@ -2500,7 +2489,7 @@ int generic_processor_info(int apicid, i
return -EINVAL;
}
- cpu_update_apic(cpu, apicid, version);
+ cpu_update_apic(cpu, apicid);
return cpu;
}
--- a/arch/x86/kernel/devicetree.c
+++ b/arch/x86/kernel/devicetree.c
@@ -128,16 +128,15 @@ static void __init dtb_setup_hpet(void)
static void __init dtb_cpu_setup(void)
{
struct device_node *dn;
- u32 apic_id, version;
+ u32 apic_id;
- version = GET_APIC_VERSION(apic_read(APIC_LVR));
for_each_of_cpu_node(dn) {
apic_id = of_get_cpu_hwid(dn, 0);
if (apic_id == ~0U) {
pr_warn("%pOF: missing local APIC ID\n", dn);
continue;
}
- generic_processor_info(apic_id, version);
+ generic_processor_info(apic_id);
}
}
--- a/arch/x86/kernel/jailhouse.c
+++ b/arch/x86/kernel/jailhouse.c
@@ -101,10 +101,8 @@ static void __init jailhouse_get_smp_con
register_lapic_address(0xfee00000);
- for (cpu = 0; cpu < setup_data.v1.num_cpus; cpu++) {
- generic_processor_info(setup_data.v1.cpu_ids[cpu],
- boot_cpu_apic_version);
- }
+ for (cpu = 0; cpu < setup_data.v1.num_cpus; cpu++)
+ generic_processor_info(setup_data.v1.cpu_ids[cpu]);
smp_found_config = 1;
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -62,7 +62,7 @@ static void __init MP_processor_info(str
bootup_cpu = " (Bootup-CPU)";
pr_info("Processor #%d%s\n", m->apicid, bootup_cpu);
- generic_processor_info(apicid, m->apicver);
+ generic_processor_info(apicid);
}
#ifdef CONFIG_X86_IO_APIC
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1389,7 +1389,7 @@ early_param("possible_cpus", _setup_poss
{
int i, possible;
- /* No boot processor was found in mptable or ACPI MADT */
+ /* No processor was found in mptable or ACPI MADT */
if (!num_processors) {
if (boot_cpu_has(X86_FEATURE_APIC)) {
int apicid = boot_cpu_physical_apicid;
@@ -1400,7 +1400,7 @@ early_param("possible_cpus", _setup_poss
/* Make sure boot cpu is enumerated */
if (apic->cpu_present_to_apicid(0) == BAD_APICID &&
apic->apic_id_valid(apicid))
- generic_processor_info(apicid, boot_cpu_apic_version);
+ generic_processor_info(apicid);
}
if (!num_processors)
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