[patch 44/58] x86/apic: Sanitize APID ID range validation
From: Thomas Gleixner
Date: Mon Jul 17 2023 - 19:24:19 EST
Now that everything has apic::max_apic_id set and the eventual update for
the x2APIC case is in place, switch the apic_id_valid() helper to use
apic::max_apic_id and remove the apic::apic_id_valid() callback.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
arch/x86/include/asm/apic.h | 3 +--
arch/x86/kernel/apic/apic_common.c | 5 -----
arch/x86/kernel/apic/apic_flat_64.c | 2 --
arch/x86/kernel/apic/apic_noop.c | 2 --
arch/x86/kernel/apic/apic_numachip.c | 8 --------
arch/x86/kernel/apic/bigsmp_32.c | 1 -
arch/x86/kernel/apic/local.h | 1 -
arch/x86/kernel/apic/probe_32.c | 1 -
arch/x86/kernel/apic/x2apic_cluster.c | 1 -
arch/x86/kernel/apic/x2apic_phys.c | 7 -------
arch/x86/kernel/apic/x2apic_uv_x.c | 6 ------
arch/x86/xen/apic.c | 6 ------
12 files changed, 1 insertion(+), 42 deletions(-)
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -284,7 +284,6 @@ struct apic {
/* Probe, setup and smpboot functions */
int (*probe)(void);
int (*acpi_madt_oem_check)(char *oem_id, char *oem_table_id);
- int (*apic_id_valid)(u32 apicid);
bool (*apic_id_registered)(void);
bool (*check_apicid_used)(physid_mask_t *map, int apicid);
@@ -378,7 +377,7 @@ static inline u32 safe_apic_wait_icr_idl
static inline bool apic_id_valid(u32 apic_id)
{
- return apic->apic_id_valid(apic_id);
+ return apic_id <= apic->max_apic_id;
}
extern void __init apic_set_eoi_write(void (*eoi_write)(u32 reg, u32 v));
--- a/arch/x86/kernel/apic/apic_common.c
+++ b/arch/x86/kernel/apic/apic_common.c
@@ -37,11 +37,6 @@ int default_cpu_present_to_apicid(int mp
}
EXPORT_SYMBOL_GPL(default_cpu_present_to_apicid);
-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);
--- a/arch/x86/kernel/apic/apic_flat_64.c
+++ b/arch/x86/kernel/apic/apic_flat_64.c
@@ -80,7 +80,6 @@ static struct apic apic_flat __ro_after_
.name = "flat",
.probe = flat_probe,
.acpi_madt_oem_check = flat_acpi_madt_oem_check,
- .apic_id_valid = default_apic_id_valid,
.apic_id_registered = default_apic_id_registered,
.delivery_mode = APIC_DELIVERY_MODE_FIXED,
@@ -158,7 +157,6 @@ static struct apic apic_physflat __ro_af
.name = "physical flat",
.probe = physflat_probe,
.acpi_madt_oem_check = physflat_acpi_madt_oem_check,
- .apic_id_valid = default_apic_id_valid,
.apic_id_registered = default_apic_id_registered,
.delivery_mode = APIC_DELIVERY_MODE_FIXED,
--- a/arch/x86/kernel/apic/apic_noop.c
+++ b/arch/x86/kernel/apic/apic_noop.c
@@ -67,8 +67,6 @@ struct apic apic_noop __ro_after_init =
.probe = noop_probe,
.acpi_madt_oem_check = NULL,
- .apic_id_valid = default_apic_id_valid,
-
.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
@@ -56,12 +56,6 @@ static u32 numachip2_set_apic_id(unsigne
return id << 24;
}
-static int numachip_apic_id_valid(u32 apicid)
-{
- /* Trust what bootloader passes in MADT */
- return 1;
-}
-
static int numachip_phys_pkg_id(int initial_apic_id, int index_msb)
{
return initial_apic_id >> index_msb;
@@ -227,7 +221,6 @@ static const struct apic apic_numachip1
.name = "NumaConnect system",
.probe = numachip1_probe,
.acpi_madt_oem_check = numachip1_acpi_madt_oem_check,
- .apic_id_valid = numachip_apic_id_valid,
.delivery_mode = APIC_DELIVERY_MODE_FIXED,
.dest_mode_logical = false,
@@ -267,7 +260,6 @@ static const struct apic apic_numachip2
.name = "NumaConnect2 system",
.probe = numachip2_probe,
.acpi_madt_oem_check = numachip2_acpi_madt_oem_check,
- .apic_id_valid = numachip_apic_id_valid,
.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
@@ -79,7 +79,6 @@ static struct apic apic_bigsmp __ro_afte
.name = "bigsmp",
.probe = probe_bigsmp,
- .apic_id_valid = default_apic_id_valid,
.delivery_mode = APIC_DELIVERY_MODE_FIXED,
.dest_mode_logical = false,
--- a/arch/x86/kernel/apic/local.h
+++ b/arch/x86/kernel/apic/local.h
@@ -14,7 +14,6 @@
#include <asm/apic.h>
/* X2APIC */
-int x2apic_apic_id_valid(u32 apicid);
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);
--- a/arch/x86/kernel/apic/probe_32.c
+++ b/arch/x86/kernel/apic/probe_32.c
@@ -33,7 +33,6 @@ static struct apic apic_default __ro_aft
.name = "default",
.probe = probe_default,
- .apic_id_valid = default_apic_id_valid,
.apic_id_registered = default_apic_id_registered,
.delivery_mode = APIC_DELIVERY_MODE_FIXED,
--- a/arch/x86/kernel/apic/x2apic_cluster.c
+++ b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -226,7 +226,6 @@ static struct apic apic_x2apic_cluster _
.name = "cluster x2apic",
.probe = x2apic_cluster_probe,
.acpi_madt_oem_check = x2apic_acpi_madt_oem_check,
- .apic_id_valid = x2apic_apic_id_valid,
.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
@@ -124,12 +124,6 @@ static int x2apic_phys_probe(void)
return apic == &apic_x2apic_phys;
}
-/* Common x2apic functions, also used by x2apic_cluster */
-int x2apic_apic_id_valid(u32 apicid)
-{
- return apicid <= x2apic_max_apicid;
-}
-
unsigned int x2apic_get_apic_id(unsigned long id)
{
return id;
@@ -150,7 +144,6 @@ static struct apic apic_x2apic_phys __ro
.name = "physical x2apic",
.probe = x2apic_phys_probe,
.acpi_madt_oem_check = x2apic_acpi_madt_oem_check,
- .apic_id_valid = x2apic_apic_id_valid,
.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
@@ -780,11 +780,6 @@ static void uv_send_IPI_all(int vector)
uv_send_IPI_mask(cpu_online_mask, vector);
}
-static int uv_apic_id_valid(u32 apicid)
-{
- return 1;
-}
-
static u32 set_apic_id(unsigned int id)
{
return id;
@@ -810,7 +805,6 @@ static struct apic apic_x2apic_uv_x __ro
.name = "UV large system",
.probe = uv_probe,
.acpi_madt_oem_check = uv_acpi_madt_oem_check,
- .apic_id_valid = uv_apic_id_valid,
.delivery_mode = APIC_DELIVERY_MODE_FIXED,
.dest_mode_logical = false,
--- a/arch/x86/xen/apic.c
+++ b/arch/x86/xen/apic.c
@@ -105,11 +105,6 @@ static int xen_madt_oem_check(char *oem_
return xen_pv_domain();
}
-static int xen_id_always_valid(u32 apicid)
-{
- return 1;
-}
-
static int xen_phys_pkg_id(int initial_apic_id, int index_msb)
{
return initial_apic_id >> index_msb;
@@ -127,7 +122,6 @@ static struct apic xen_pv_apic = {
.name = "Xen PV",
.probe = xen_apic_probe_pv,
.acpi_madt_oem_check = xen_madt_oem_check,
- .apic_id_valid = xen_id_always_valid,
/* .delivery_mode and .dest_mode_logical not used by XENPV */