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Message-ID: <20230717223223.254985852@linutronix.de>
Date: Tue, 18 Jul 2023 01:14:38 +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 03/58] x86/apic: Rename disable_apic
It reflects a state and not a command. Make it bool while at it.
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
arch/x86/include/asm/apic.h | 4 ++--
arch/x86/kernel/apic/apic.c | 22 +++++++++++-----------
arch/x86/kernel/apic/apic_noop.c | 6 +++---
arch/x86/kernel/apic/msi.c | 2 +-
arch/x86/kernel/apic/vector.c | 2 +-
arch/x86/kernel/setup.c | 2 +-
arch/x86/pci/xen.c | 2 +-
7 files changed, 20 insertions(+), 20 deletions(-)
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -52,7 +52,7 @@ static inline void generic_apic_probe(vo
extern int apic_verbosity;
extern int local_apic_timer_c2_ok;
-extern int disable_apic;
+extern bool apic_is_disabled;
extern unsigned int lapic_timer_period;
extern int cpuid_to_apicid[];
@@ -90,7 +90,7 @@ static inline void default_inquire_remot
*/
static inline bool apic_from_smp_config(void)
{
- return smp_found_config && !disable_apic;
+ return smp_found_config && !apic_is_disabled;
}
/*
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -180,7 +180,7 @@ static __init int setup_apicpmtimer(char
#endif
unsigned long mp_lapic_addr __ro_after_init;
-int disable_apic __ro_after_init;
+bool apic_is_disabled __ro_after_init;
/* Disable local APIC timer from the kernel commandline or via dmi quirk */
static int disable_apic_timer __initdata;
/* Local APIC timer works in C2 */
@@ -810,7 +810,7 @@ bool __init apic_needs_pit(void)
return true;
/* Is there an APIC at all or is it disabled? */
- if (!boot_cpu_has(X86_FEATURE_APIC) || disable_apic)
+ if (!boot_cpu_has(X86_FEATURE_APIC) || apic_is_disabled)
return true;
/*
@@ -1299,7 +1299,7 @@ enum apic_intr_mode_id apic_intr_mode __
static int __init __apic_intr_mode_select(void)
{
/* Check kernel option */
- if (disable_apic) {
+ if (apic_is_disabled) {
pr_info("APIC disabled via kernel command line\n");
return APIC_PIC;
}
@@ -1308,7 +1308,7 @@ static int __init __apic_intr_mode_selec
#ifdef CONFIG_X86_64
/* On 64-bit, the APIC must be integrated, Check local APIC only */
if (!boot_cpu_has(X86_FEATURE_APIC)) {
- disable_apic = 1;
+ apic_is_disabled = true;
pr_info("APIC disabled by BIOS\n");
return APIC_PIC;
}
@@ -1317,14 +1317,14 @@ static int __init __apic_intr_mode_selec
/* Neither 82489DX nor integrated APIC ? */
if (!boot_cpu_has(X86_FEATURE_APIC) && !smp_found_config) {
- disable_apic = 1;
+ apic_is_disabled = true;
return APIC_PIC;
}
/* If the BIOS pretends there is an integrated APIC ? */
if (!boot_cpu_has(X86_FEATURE_APIC) &&
APIC_INTEGRATED(boot_cpu_apic_version)) {
- disable_apic = 1;
+ apic_is_disabled = true;
pr_err(FW_BUG "Local APIC %d not detected, force emulation\n",
boot_cpu_physical_apicid);
return APIC_PIC;
@@ -1567,7 +1567,7 @@ static void setup_local_APIC(void)
int cpu = smp_processor_id();
unsigned int value;
- if (disable_apic) {
+ if (apic_is_disabled) {
disable_ioapic_support();
return;
}
@@ -1943,7 +1943,7 @@ void __init check_x2apic(void)
pr_err("Kernel does not support x2APIC, please recompile with CONFIG_X86_X2APIC.\n");
pr_err("Disabling APIC, expect reduced performance and functionality.\n");
- disable_apic = 1;
+ apic_is_disabled = true;
setup_clear_cpu_cap(X86_FEATURE_APIC);
}
@@ -2037,7 +2037,7 @@ int __init apic_force_enable(unsigned lo
{
u32 h, l;
- if (disable_apic)
+ if (apic_is_disabled)
return -1;
/*
@@ -2064,7 +2064,7 @@ int __init apic_force_enable(unsigned lo
static int __init detect_init_APIC(void)
{
/* Disabled by kernel option? */
- if (disable_apic)
+ if (apic_is_disabled)
return -1;
switch (boot_cpu_data.x86_vendor) {
@@ -2919,7 +2919,7 @@ int apic_is_clustered_box(void)
*/
static int __init setup_disableapic(char *arg)
{
- disable_apic = 1;
+ apic_is_disabled = true;
setup_clear_cpu_cap(X86_FEATURE_APIC);
return 0;
}
--- a/arch/x86/kernel/apic/apic_noop.c
+++ b/arch/x86/kernel/apic/apic_noop.c
@@ -71,13 +71,13 @@ static int noop_apic_id_registered(void)
static u32 noop_apic_read(u32 reg)
{
- WARN_ON_ONCE(boot_cpu_has(X86_FEATURE_APIC) && !disable_apic);
+ WARN_ON_ONCE(boot_cpu_has(X86_FEATURE_APIC) && !apic_is_disabled);
return 0;
}
-static void noop_apic_write(u32 reg, u32 v)
+static void noop_apic_write(u32 reg, u32 val)
{
- WARN_ON_ONCE(boot_cpu_has(X86_FEATURE_APIC) && !disable_apic);
+ WARN_ON_ONCE(boot_cpu_has(X86_FEATURE_APIC) && !apic_is_disabled);
}
#ifdef CONFIG_X86_32
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -269,7 +269,7 @@ static const struct msi_parent_ops x86_v
struct irq_domain * __init native_create_pci_msi_domain(void)
{
- if (disable_apic)
+ if (apic_is_disabled)
return NULL;
x86_vector_domain->flags |= IRQ_DOMAIN_FLAG_MSI_PARENT;
--- a/arch/x86/kernel/apic/vector.c
+++ b/arch/x86/kernel/apic/vector.c
@@ -536,7 +536,7 @@ static int x86_vector_alloc_irqs(struct
struct irq_data *irqd;
int i, err, node;
- if (disable_apic)
+ if (apic_is_disabled)
return -ENXIO;
/*
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -1020,7 +1020,7 @@ void __init setup_arch(char **cmdline_p)
if (acpi_mps_check()) {
#ifdef CONFIG_X86_LOCAL_APIC
- disable_apic = 1;
+ apic_is_disabled = true;
#endif
setup_clear_cpu_cap(X86_FEATURE_APIC);
}
--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -517,7 +517,7 @@ int __init pci_xen_init(void)
#ifdef CONFIG_PCI_MSI
static void __init xen_hvm_msi_init(void)
{
- if (!disable_apic) {
+ if (!apic_is_disabled) {
/*
* If hardware supports (x2)APIC virtualization (as indicated
* by hypervisor's leaf 4) then we don't need to use pirqs/
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