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Message-ID: <20230807135027.429700142@linutronix.de>
Date: Mon, 7 Aug 2023 15:53:03 +0200 (CEST)
From: Thomas Gleixner <tglx@...utronix.de>
To: LKML <linux-kernel@...r.kernel.org>
Cc: x86@...nel.org, Tom Lendacky <thomas.lendacky@....com>,
Andrew Cooper <andrew.cooper3@...rix.com>,
Arjan van de Ven <arjan@...ux.intel.com>,
Huang Rui <ray.huang@....com>, Juergen Gross <jgross@...e.com>,
Dimitri Sivanich <dimitri.sivanich@....com>,
Michael Kelley <mikelley@...rosoft.com>,
Sohil Mehta <sohil.mehta@...el.com>,
K Prateek Nayak <kprateek.nayak@....com>,
Kan Liang <kan.liang@...ux.intel.com>,
Zhang Rui <rui.zhang@...el.com>,
"Paul E. McKenney" <paulmck@...nel.org>,
Feng Tang <feng.tang@...el.com>,
Andy Shevchenko <andy@...radead.org>
Subject: [patch 19/53] x86/mpparse: Remove the physid_t bitmap wrapper
physid_t is a wrapper around bitmap. Just remove the onion layer and use
bitmap functionality directly.
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
arch/x86/include/asm/mpspec.h | 32 +++++++++-----------------------
arch/x86/kernel/apic/apic.c | 11 +++++------
arch/x86/kernel/apic/apic_common.c | 12 +-----------
arch/x86/kernel/apic/io_apic.c | 24 ++++++++++++------------
arch/x86/kernel/apic/local.h | 1 -
arch/x86/kernel/smpboot.c | 8 +++-----
6 files changed, 30 insertions(+), 58 deletions(-)
--- a/arch/x86/include/asm/mpspec.h
+++ b/arch/x86/include/asm/mpspec.h
@@ -2,6 +2,7 @@
#ifndef _ASM_X86_MPSPEC_H
#define _ASM_X86_MPSPEC_H
+#include <linux/types.h>
#include <asm/mpspec_def.h>
#include <asm/x86_init.h>
@@ -62,32 +63,17 @@ static inline void e820__memblock_alloc_
int generic_processor_info(int apicid);
-#define PHYSID_ARRAY_SIZE BITS_TO_LONGS(MAX_LOCAL_APIC)
+extern DECLARE_BITMAP(phys_cpu_present_map, MAX_LOCAL_APIC);
-struct physid_mask {
- unsigned long mask[PHYSID_ARRAY_SIZE];
-};
-
-typedef struct physid_mask physid_mask_t;
-
-#define physid_set(physid, map) set_bit(physid, (map).mask)
-#define physid_isset(physid, map) test_bit(physid, (map).mask)
-
-#define physids_clear(map) \
- bitmap_zero((map).mask, MAX_LOCAL_APIC)
-
-#define physids_empty(map) \
- bitmap_empty((map).mask, MAX_LOCAL_APIC)
-
-static inline void physid_set_mask_of_physid(int physid, physid_mask_t *map)
+static inline void reset_phys_cpu_present_map(u32 apicid)
{
- physids_clear(*map);
- physid_set(physid, *map);
+ bitmap_zero(phys_cpu_present_map, MAX_LOCAL_APIC);
+ set_bit(apicid, phys_cpu_present_map);
}
-#define PHYSID_MASK_ALL { {[0 ... PHYSID_ARRAY_SIZE-1] = ~0UL} }
-#define PHYSID_MASK_NONE { {[0 ... PHYSID_ARRAY_SIZE-1] = 0UL} }
-
-extern physid_mask_t phys_cpu_present_map;
+static inline void copy_phys_cpu_present_map(unsigned long *dst)
+{
+ bitmap_copy(dst, phys_cpu_present_map, MAX_LOCAL_APIC);
+}
#endif /* _ASM_X86_MPSPEC_H */
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -22,6 +22,7 @@
#include <linux/clockchips.h>
#include <linux/interrupt.h>
#include <linux/memblock.h>
+#include <linux/bitmap.h>
#include <linux/ftrace.h>
#include <linux/ioport.h>
#include <linux/export.h>
@@ -77,10 +78,8 @@ EXPORT_SYMBOL_GPL(boot_cpu_physical_apic
u8 boot_cpu_apic_version __ro_after_init;
-/*
- * Bitmask of physically existing CPUs:
- */
-physid_mask_t phys_cpu_present_map;
+/* Bitmap of physically present CPUs. */
+DECLARE_BITMAP(phys_cpu_present_map, MAX_LOCAL_APIC);
/*
* Processor to be disabled specified by kernel parameter
@@ -2387,7 +2386,7 @@ static void cpu_update_apic(int cpu, u32
early_per_cpu(x86_cpu_to_apicid, cpu) = apicid;
#endif
set_cpu_possible(cpu, true);
- physid_set(apicid, phys_cpu_present_map);
+ set_bit(apicid, phys_cpu_present_map);
set_cpu_present(cpu, true);
num_processors++;
@@ -2489,7 +2488,7 @@ static void __init apic_bsp_up_setup(voi
#ifdef CONFIG_X86_64
apic_write(APIC_ID, apic->set_apic_id(boot_cpu_physical_apicid));
#endif
- physid_set_mask_of_physid(boot_cpu_physical_apicid, &phys_cpu_present_map);
+ reset_phys_cpu_present_map(boot_cpu_physical_apicid);
}
/**
--- a/arch/x86/kernel/apic/apic_common.c
+++ b/arch/x86/kernel/apic/apic_common.c
@@ -18,16 +18,6 @@ u32 apic_flat_calc_apicid(unsigned int c
return 1U << cpu;
}
-bool default_check_apicid_used(physid_mask_t *map, u32 apicid)
-{
- return physid_isset(apicid, *map);
-}
-
-void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
-{
- *retmap = *phys_map;
-}
-
u32 default_cpu_present_to_apicid(int mps_cpu)
{
if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu))
@@ -39,7 +29,7 @@ EXPORT_SYMBOL_GPL(default_cpu_present_to
bool default_apic_id_registered(void)
{
- return physid_isset(read_apic_id(), phys_cpu_present_map);
+ return test_bit(read_apic_id(), phys_cpu_present_map);
}
/*
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1460,7 +1460,7 @@ void restore_boot_irq_mode(void)
*/
static void __init setup_ioapic_ids_from_mpc_nocheck(void)
{
- physid_mask_t phys_id_present_map;
+ DECLARE_BITMAP(phys_id_present_map, MAX_LOCAL_APIC);
const u32 broadcast_id = 0xF;
union IO_APIC_reg_00 reg_00;
unsigned char old_id;
@@ -1471,7 +1471,7 @@ static void __init setup_ioapic_ids_from
* This is broken; anything with a real cpu count has to
* circumvent this idiocy regardless.
*/
- phys_id_present_map = phys_cpu_present_map;
+ copy_phys_cpu_present_map(phys_id_present_map);
/*
* Set the IOAPIC ID to the value stored in the MPC table.
@@ -1496,21 +1496,21 @@ static void __init setup_ioapic_ids_from
* system must have a unique ID or we get lots of nice
* 'stuck on smp_invalidate_needed IPI wait' messages.
*/
- if (physid_isset(mpc_ioapic_id(ioapic_idx), phys_id_present_map)) {
+ if (test_bit(mpc_ioapic_id(ioapic_idx), phys_id_present_map)) {
pr_err("BIOS bug, IO-APIC#%d ID %d is already used!...\n",
ioapic_idx, mpc_ioapic_id(ioapic_idx));
for (i = 0; i < broadcast_id; i++)
- if (!physid_isset(i, phys_id_present_map))
+ if (!test_bit(i, phys_id_present_map))
break;
if (i >= broadcast_id)
panic("Max APIC ID exceeded!\n");
pr_err("... fixing up to %d. (tell your hw vendor)\n", i);
- physid_set(i, phys_id_present_map);
+ set_bit(i, phys_id_present_map);
ioapics[ioapic_idx].mp_config.apicid = i;
} else {
apic_printk(APIC_VERBOSE, "Setting %d in the phys_id_present_map\n",
mpc_ioapic_id(ioapic_idx));
- physid_set(mpc_ioapic_id(ioapic_idx), phys_id_present_map);
+ set_bit(mpc_ioapic_id(ioapic_idx), phys_id_present_map);
}
/*
@@ -2491,15 +2491,15 @@ unsigned int arch_dynirq_lower_bound(uns
#ifdef CONFIG_X86_32
static int io_apic_get_unique_id(int ioapic, int apic_id)
{
- static physid_mask_t apic_id_map = PHYSID_MASK_NONE;
+ static DECLARE_BITMAP(apic_id_map, MAX_LOCAL_APIC);
const u32 broadcast_id = 0xF;
union IO_APIC_reg_00 reg_00;
unsigned long flags;
int i = 0;
/* Initialize the ID map */
- if (physids_empty(apic_id_map))
- apic_id_map = phys_cpu_present_map;
+ if (bitmap_empty(apic_id_map, MAX_LOCAL_APIC))
+ copy_phys_cpu_present_map(apic_id_map);
raw_spin_lock_irqsave(&ioapic_lock, flags);
reg_00.raw = io_apic_read(ioapic, 0);
@@ -2512,9 +2512,9 @@ static int io_apic_get_unique_id(int ioa
}
/* Every APIC in a system must have a unique ID */
- if (physid_isset(apic_id, apic_id_map)) {
+ if (test_bit(apic_id, apic_id_map)) {
for (i = 0; i < broadcast_id; i++) {
- if (!physid_isset(i, apic_id_map))
+ if (!test_bit(i, apic_id_map))
break;
}
@@ -2525,7 +2525,7 @@ static int io_apic_get_unique_id(int ioa
apic_id = i;
}
- physid_set(apic_id, apic_id_map);
+ set_bit(apic_id, apic_id_map);
if (reg_00.bits.ID != apic_id) {
reg_00.bits.ID = apic_id;
--- a/arch/x86/kernel/apic/local.h
+++ b/arch/x86/kernel/apic/local.h
@@ -63,7 +63,6 @@ void default_send_IPI_all(int vector);
void default_send_IPI_self(int vector);
bool default_apic_id_registered(void);
-bool default_check_apicid_used(physid_mask_t *map, u32 apicid);
#ifdef CONFIG_X86_32
void default_send_IPI_mask_sequence_logical(const struct cpumask *mask, int vector);
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1081,7 +1081,7 @@ int native_kick_ap(unsigned int cpu, str
pr_debug("++++++++++++++++++++=_---CPU UP %u\n", cpu);
- if (apicid == BAD_APICID || !physid_isset(apicid, phys_cpu_present_map) ||
+ if (apicid == BAD_APICID || !test_bit(apicid, phys_cpu_present_map) ||
!apic_id_valid(apicid)) {
pr_err("%s: bad cpu %d\n", __func__, cpu);
return -EINVAL;
@@ -1156,10 +1156,8 @@ static __init void disable_smp(void)
init_cpu_present(cpumask_of(0));
init_cpu_possible(cpumask_of(0));
- if (smp_found_config)
- physid_set_mask_of_physid(boot_cpu_physical_apicid, &phys_cpu_present_map);
- else
- physid_set_mask_of_physid(0, &phys_cpu_present_map);
+ reset_phys_cpu_present_map(smp_found_config ? boot_cpu_physical_apicid : 0);
+
cpumask_set_cpu(0, topology_sibling_cpumask(0));
cpumask_set_cpu(0, topology_core_cpumask(0));
cpumask_set_cpu(0, topology_die_cpumask(0));
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