[tip: x86/apic] x86/apic: Add max_apic_id member
From: tip-bot2 for Thomas Gleixner
Date: Wed Aug 09 2023 - 16:37:00 EST
The following commit has been merged into the x86/apic branch of tip:
Commit-ID: d92e5e7cf580ac59678fa40fd99aa8eb00f1ff52
Gitweb: https://git.kernel.org/tip/d92e5e7cf580ac59678fa40fd99aa8eb00f1ff52
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Tue, 08 Aug 2023 15:04:10 -07:00
Committer: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
CommitterDate: Wed, 09 Aug 2023 11:58:31 -07:00
x86/apic: Add max_apic_id member
There is really no point to have a callback which compares numbers.
Add a field which allows each APIC to store the maximum APIC ID supported
and fill it in for all APIC incarnations.
The next step will remove the callback.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Tested-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
Tested-by: Sohil Mehta <sohil.mehta@xxxxxxxxx>
Tested-by: Juergen Gross <jgross@xxxxxxxx> # Xen PV (dom0 and unpriv. guest)
---
arch/x86/include/asm/apic.h | 3 +++
arch/x86/kernel/apic/apic_flat_64.c | 2 ++
arch/x86/kernel/apic/apic_noop.c | 1 +
arch/x86/kernel/apic/apic_numachip.c | 2 ++
arch/x86/kernel/apic/bigsmp_32.c | 1 +
arch/x86/kernel/apic/probe_32.c | 1 +
arch/x86/kernel/apic/x2apic_cluster.c | 1 +
arch/x86/kernel/apic/x2apic_phys.c | 1 +
arch/x86/kernel/apic/x2apic_uv_x.c | 1 +
arch/x86/xen/apic.c | 1 +
10 files changed, 14 insertions(+)
diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index 5a01d51..42d3240 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -277,6 +277,9 @@ struct apic {
u64 (*icr_read)(void);
void (*icr_write)(u32 low, u32 high);
+ /* The limit of the APIC ID space. */
+ u32 max_apic_id;
+
/* Probe, setup and smpboot functions */
int (*probe)(void);
int (*acpi_madt_oem_check)(char *oem_id, char *oem_table_id);
diff --git a/arch/x86/kernel/apic/apic_flat_64.c b/arch/x86/kernel/apic/apic_flat_64.c
index 1da865f..b5e85bb 100644
--- a/arch/x86/kernel/apic/apic_flat_64.c
+++ b/arch/x86/kernel/apic/apic_flat_64.c
@@ -94,6 +94,7 @@ static struct apic apic_flat __ro_after_init = {
.cpu_present_to_apicid = default_cpu_present_to_apicid,
.phys_pkg_id = flat_phys_pkg_id,
+ .max_apic_id = 0xFE,
.get_apic_id = flat_get_apic_id,
.set_apic_id = set_apic_id,
@@ -170,6 +171,7 @@ static struct apic apic_physflat __ro_after_init = {
.cpu_present_to_apicid = default_cpu_present_to_apicid,
.phys_pkg_id = flat_phys_pkg_id,
+ .max_apic_id = 0xFE,
.get_apic_id = flat_get_apic_id,
.set_apic_id = set_apic_id,
diff --git a/arch/x86/kernel/apic/apic_noop.c b/arch/x86/kernel/apic/apic_noop.c
index 36c1e28..d49c10d 100644
--- a/arch/x86/kernel/apic/apic_noop.c
+++ b/arch/x86/kernel/apic/apic_noop.c
@@ -80,6 +80,7 @@ struct apic apic_noop __ro_after_init = {
.phys_pkg_id = noop_phys_pkg_id,
+ .max_apic_id = 0xFE,
.get_apic_id = noop_get_apic_id,
.set_apic_id = NULL,
diff --git a/arch/x86/kernel/apic/apic_numachip.c b/arch/x86/kernel/apic/apic_numachip.c
index e879dbb..43cbc24 100644
--- a/arch/x86/kernel/apic/apic_numachip.c
+++ b/arch/x86/kernel/apic/apic_numachip.c
@@ -239,6 +239,7 @@ static const struct apic apic_numachip1 __refconst = {
.cpu_present_to_apicid = default_cpu_present_to_apicid,
.phys_pkg_id = numachip_phys_pkg_id,
+ .max_apic_id = UINT_MAX,
.get_apic_id = numachip1_get_apic_id,
.set_apic_id = numachip1_set_apic_id,
@@ -278,6 +279,7 @@ static const struct apic apic_numachip2 __refconst = {
.cpu_present_to_apicid = default_cpu_present_to_apicid,
.phys_pkg_id = numachip_phys_pkg_id,
+ .max_apic_id = UINT_MAX,
.get_apic_id = numachip2_get_apic_id,
.set_apic_id = numachip2_set_apic_id,
diff --git a/arch/x86/kernel/apic/bigsmp_32.c b/arch/x86/kernel/apic/bigsmp_32.c
index 32984bf..5f7a94b 100644
--- a/arch/x86/kernel/apic/bigsmp_32.c
+++ b/arch/x86/kernel/apic/bigsmp_32.c
@@ -91,6 +91,7 @@ static struct apic apic_bigsmp __ro_after_init = {
.cpu_present_to_apicid = default_cpu_present_to_apicid,
.phys_pkg_id = bigsmp_phys_pkg_id,
+ .max_apic_id = 0xFE,
.get_apic_id = bigsmp_get_apic_id,
.set_apic_id = NULL,
diff --git a/arch/x86/kernel/apic/probe_32.c b/arch/x86/kernel/apic/probe_32.c
index a861a77..7c4b5f7 100644
--- a/arch/x86/kernel/apic/probe_32.c
+++ b/arch/x86/kernel/apic/probe_32.c
@@ -47,6 +47,7 @@ static struct apic apic_default __ro_after_init = {
.cpu_present_to_apicid = default_cpu_present_to_apicid,
.phys_pkg_id = default_phys_pkg_id,
+ .max_apic_id = 0xFE,
.get_apic_id = default_get_apic_id,
.set_apic_id = NULL,
diff --git a/arch/x86/kernel/apic/x2apic_cluster.c b/arch/x86/kernel/apic/x2apic_cluster.c
index afd2676..036dd1c 100644
--- a/arch/x86/kernel/apic/x2apic_cluster.c
+++ b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -239,6 +239,7 @@ static struct apic apic_x2apic_cluster __ro_after_init = {
.cpu_present_to_apicid = default_cpu_present_to_apicid,
.phys_pkg_id = x2apic_phys_pkg_id,
+ .max_apic_id = UINT_MAX,
.get_apic_id = x2apic_get_apic_id,
.set_apic_id = x2apic_set_apic_id,
diff --git a/arch/x86/kernel/apic/x2apic_phys.c b/arch/x86/kernel/apic/x2apic_phys.c
index c40d19b..d6495ac 100644
--- a/arch/x86/kernel/apic/x2apic_phys.c
+++ b/arch/x86/kernel/apic/x2apic_phys.c
@@ -163,6 +163,7 @@ static struct apic apic_x2apic_phys __ro_after_init = {
.cpu_present_to_apicid = default_cpu_present_to_apicid,
.phys_pkg_id = x2apic_phys_pkg_id,
+ .max_apic_id = UINT_MAX,
.get_apic_id = x2apic_get_apic_id,
.set_apic_id = x2apic_set_apic_id,
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index a8ed237..7d4eaa8 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -822,6 +822,7 @@ static struct apic apic_x2apic_uv_x __ro_after_init = {
.cpu_present_to_apicid = default_cpu_present_to_apicid,
.phys_pkg_id = uv_phys_pkg_id,
+ .max_apic_id = UINT_MAX,
.get_apic_id = x2apic_get_apic_id,
.set_apic_id = set_apic_id,
diff --git a/arch/x86/xen/apic.c b/arch/x86/xen/apic.c
index 0f71b2e..572814b 100644
--- a/arch/x86/xen/apic.c
+++ b/arch/x86/xen/apic.c
@@ -138,6 +138,7 @@ static struct apic xen_pv_apic = {
.cpu_present_to_apicid = xen_cpu_present_to_apicid,
.phys_pkg_id = xen_phys_pkg_id, /* detect_ht */
+ .max_apic_id = UINT_MAX,
.get_apic_id = xen_get_apic_id,
.set_apic_id = xen_set_apic_id, /* Can be NULL on 32-bit. */