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Message-ID: <20230717223224.921638275@linutronix.de>
Date: Tue, 18 Jul 2023 01:15:22 +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 31/58] x86/apic: Mop up apic::apic_id_registered()
Really not a hotpath and again no reason for having a gazillion of empty
callbacks returning 1. Make it return bool and provide one shared
implementation for the remaining users.
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
arch/x86/include/asm/apic.h | 2 +-
arch/x86/kernel/apic/apic.c | 7 ++-----
arch/x86/kernel/apic/apic_common.c | 5 +++++
arch/x86/kernel/apic/apic_flat_64.c | 14 ++------------
arch/x86/kernel/apic/apic_noop.c | 12 ------------
arch/x86/kernel/apic/apic_numachip.c | 7 -------
arch/x86/kernel/apic/bigsmp_32.c | 6 ------
arch/x86/kernel/apic/local.h | 3 ++-
arch/x86/kernel/apic/probe_32.c | 5 -----
arch/x86/kernel/apic/x2apic_cluster.c | 1 -
arch/x86/kernel/apic/x2apic_phys.c | 6 ------
arch/x86/kernel/apic/x2apic_uv_x.c | 6 ------
arch/x86/xen/apic.c | 6 ------
13 files changed, 12 insertions(+), 68 deletions(-)
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -295,7 +295,7 @@ struct apic {
int (*probe)(void);
int (*acpi_madt_oem_check)(char *oem_id, char *oem_table_id);
int (*apic_id_valid)(u32 apicid);
- int (*apic_id_registered)(void);
+ bool (*apic_id_registered)(void);
bool (*check_apicid_used)(physid_mask_t *map, int apicid);
void (*init_apic_ldr)(void);
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1571,11 +1571,8 @@ static void setup_local_APIC(void)
apic_write(APIC_ESR, 0);
}
#endif
- /*
- * Double-check whether this APIC is really registered.
- * This is meaningless in clustered apic mode, so we skip it.
- */
- BUG_ON(!apic->apic_id_registered());
+ /* Validate that the APIC is registered if required */
+ BUG_ON(apic->apic_id_registered && !apic->apic_id_registered());
/*
* Intel recommends to set DFR, LDR and TPR before enabling
--- a/arch/x86/kernel/apic/apic_common.c
+++ b/arch/x86/kernel/apic/apic_common.c
@@ -42,6 +42,11 @@ int default_apic_id_valid(u32 apicid)
return (apicid < 255);
}
+bool default_apic_id_registered(void)
+{
+ return physid_isset(read_apic_id(), phys_cpu_present_map);
+}
+
/*
* Set up the logical destination ID when the APIC operates in logical
* destination mode.
--- a/arch/x86/kernel/apic/apic_flat_64.c
+++ b/arch/x86/kernel/apic/apic_flat_64.c
@@ -66,16 +66,6 @@ static u32 set_apic_id(unsigned int id)
return (id & 0xFF) << 24;
}
-static unsigned int read_xapic_id(void)
-{
- return flat_get_apic_id(apic_read(APIC_ID));
-}
-
-static int flat_apic_id_registered(void)
-{
- return physid_isset(read_xapic_id(), phys_cpu_present_map);
-}
-
static int flat_phys_pkg_id(int initial_apic_id, int index_msb)
{
return initial_apic_id >> index_msb;
@@ -91,7 +81,7 @@ static struct apic apic_flat __ro_after_
.probe = flat_probe,
.acpi_madt_oem_check = flat_acpi_madt_oem_check,
.apic_id_valid = default_apic_id_valid,
- .apic_id_registered = flat_apic_id_registered,
+ .apic_id_registered = default_apic_id_registered,
.delivery_mode = APIC_DELIVERY_MODE_FIXED,
.dest_mode_logical = true,
@@ -168,7 +158,7 @@ static struct apic apic_physflat __ro_af
.probe = physflat_probe,
.acpi_madt_oem_check = physflat_acpi_madt_oem_check,
.apic_id_valid = default_apic_id_valid,
- .apic_id_registered = flat_apic_id_registered,
+ .apic_id_registered = default_apic_id_registered,
.delivery_mode = APIC_DELIVERY_MODE_FIXED,
.dest_mode_logical = false,
--- a/arch/x86/kernel/apic/apic_noop.c
+++ b/arch/x86/kernel/apic/apic_noop.c
@@ -57,17 +57,6 @@ static int noop_probe(void)
return 0;
}
-static int noop_apic_id_registered(void)
-{
- /*
- * if we would be really "pedantic"
- * we should pass read_apic_id() here
- * but since NOOP suppose APIC ID = 0
- * lets save a few cycles
- */
- return physid_isset(0, phys_cpu_present_map);
-}
-
static u32 noop_apic_read(u32 reg)
{
WARN_ON_ONCE(boot_cpu_has(X86_FEATURE_APIC) && !apic_is_disabled);
@@ -85,7 +74,6 @@ struct apic apic_noop __ro_after_init =
.acpi_madt_oem_check = NULL,
.apic_id_valid = default_apic_id_valid,
- .apic_id_registered = noop_apic_id_registered,
.delivery_mode = APIC_DELIVERY_MODE_FIXED,
.dest_mode_logical = true,
--- a/arch/x86/kernel/apic/apic_numachip.c
+++ b/arch/x86/kernel/apic/apic_numachip.c
@@ -62,11 +62,6 @@ static int numachip_apic_id_valid(u32 ap
return 1;
}
-static int numachip_apic_id_registered(void)
-{
- return 1;
-}
-
static int numachip_phys_pkg_id(int initial_apic_id, int index_msb)
{
return initial_apic_id >> index_msb;
@@ -244,7 +239,6 @@ static const struct apic apic_numachip1
.probe = numachip1_probe,
.acpi_madt_oem_check = numachip1_acpi_madt_oem_check,
.apic_id_valid = numachip_apic_id_valid,
- .apic_id_registered = numachip_apic_id_registered,
.delivery_mode = APIC_DELIVERY_MODE_FIXED,
.dest_mode_logical = false,
@@ -286,7 +280,6 @@ static const struct apic apic_numachip2
.probe = numachip2_probe,
.acpi_madt_oem_check = numachip2_acpi_madt_oem_check,
.apic_id_valid = numachip_apic_id_valid,
- .apic_id_registered = numachip_apic_id_registered,
.delivery_mode = APIC_DELIVERY_MODE_FIXED,
.dest_mode_logical = false,
--- a/arch/x86/kernel/apic/bigsmp_32.c
+++ b/arch/x86/kernel/apic/bigsmp_32.c
@@ -18,11 +18,6 @@ static unsigned bigsmp_get_apic_id(unsig
return (x >> 24) & 0xFF;
}
-static int bigsmp_apic_id_registered(void)
-{
- return 1;
-}
-
static bool bigsmp_check_apicid_used(physid_mask_t *map, int apicid)
{
return false;
@@ -85,7 +80,6 @@ static struct apic apic_bigsmp __ro_afte
.name = "bigsmp",
.probe = probe_bigsmp,
.apic_id_valid = default_apic_id_valid,
- .apic_id_registered = bigsmp_apic_id_registered,
.delivery_mode = APIC_DELIVERY_MODE_FIXED,
.dest_mode_logical = false,
--- a/arch/x86/kernel/apic/local.h
+++ b/arch/x86/kernel/apic/local.h
@@ -15,7 +15,6 @@
/* X2APIC */
int x2apic_apic_id_valid(u32 apicid);
-int x2apic_apic_id_registered(void);
void __x2apic_send_IPI_dest(unsigned int apicid, int vector, unsigned int dest);
unsigned int x2apic_get_apic_id(unsigned long id);
u32 x2apic_set_apic_id(unsigned int id);
@@ -61,6 +60,8 @@ void default_send_IPI_allbutself(int vec
void default_send_IPI_all(int vector);
void default_send_IPI_self(int vector);
+bool default_apic_id_registered(void);
+
#ifdef CONFIG_X86_32
void default_send_IPI_mask_sequence_logical(const struct cpumask *mask, int vector);
void default_send_IPI_mask_allbutself_logical(const struct cpumask *mask, int vector);
--- a/arch/x86/kernel/apic/probe_32.c
+++ b/arch/x86/kernel/apic/probe_32.c
@@ -18,11 +18,6 @@
#include "local.h"
-static int default_apic_id_registered(void)
-{
- return physid_isset(read_apic_id(), phys_cpu_present_map);
-}
-
static int default_phys_pkg_id(int cpuid_apic, int index_msb)
{
return cpuid_apic >> index_msb;
--- a/arch/x86/kernel/apic/x2apic_cluster.c
+++ b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -237,7 +237,6 @@ static struct apic apic_x2apic_cluster _
.probe = x2apic_cluster_probe,
.acpi_madt_oem_check = x2apic_acpi_madt_oem_check,
.apic_id_valid = x2apic_apic_id_valid,
- .apic_id_registered = x2apic_apic_id_registered,
.delivery_mode = APIC_DELIVERY_MODE_FIXED,
.dest_mode_logical = true,
--- a/arch/x86/kernel/apic/x2apic_phys.c
+++ b/arch/x86/kernel/apic/x2apic_phys.c
@@ -111,11 +111,6 @@ int x2apic_apic_id_valid(u32 apicid)
return 1;
}
-int x2apic_apic_id_registered(void)
-{
- return 1;
-}
-
void __x2apic_send_IPI_dest(unsigned int apicid, int vector, unsigned int dest)
{
unsigned long cfg = __prepare_ICR(0, vector, dest);
@@ -157,7 +152,6 @@ static struct apic apic_x2apic_phys __ro
.probe = x2apic_phys_probe,
.acpi_madt_oem_check = x2apic_acpi_madt_oem_check,
.apic_id_valid = x2apic_apic_id_valid,
- .apic_id_registered = x2apic_apic_id_registered,
.delivery_mode = APIC_DELIVERY_MODE_FIXED,
.dest_mode_logical = false,
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -783,11 +783,6 @@ static int uv_apic_id_valid(u32 apicid)
return 1;
}
-static int uv_apic_id_registered(void)
-{
- return 1;
-}
-
static u32 apic_uv_calc_apicid(unsigned int cpu)
{
return apic_default_calc_apicid(cpu);
@@ -829,7 +824,6 @@ static struct apic apic_x2apic_uv_x __ro
.probe = uv_probe,
.acpi_madt_oem_check = uv_acpi_madt_oem_check,
.apic_id_valid = uv_apic_id_valid,
- .apic_id_registered = uv_apic_id_registered,
.delivery_mode = APIC_DELIVERY_MODE_FIXED,
.dest_mode_logical = false,
--- a/arch/x86/xen/apic.c
+++ b/arch/x86/xen/apic.c
@@ -115,11 +115,6 @@ static int xen_id_always_valid(u32 apici
return 1;
}
-static int xen_id_always_registered(void)
-{
- return 1;
-}
-
static int xen_phys_pkg_id(int initial_apic_id, int index_msb)
{
return initial_apic_id >> index_msb;
@@ -142,7 +137,6 @@ static struct apic xen_pv_apic = {
.probe = xen_apic_probe_pv,
.acpi_madt_oem_check = xen_madt_oem_check,
.apic_id_valid = xen_id_always_valid,
- .apic_id_registered = xen_id_always_registered,
/* .delivery_mode and .dest_mode_logical not used by XENPV */
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