summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-30 03:35:47 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-30 03:35:47 +0000
commit926b6f28303f165411f8dc876c265de64059e9a9 (patch)
treefc75a8914b7694687b43740c15957e02f964364c /arch/x86/kernel
parentReleasing progress-linux version 6.8.9-1~progress7.99u1. (diff)
downloadlinux-926b6f28303f165411f8dc876c265de64059e9a9.tar.xz
linux-926b6f28303f165411f8dc876c265de64059e9a9.zip
Merging upstream version 6.8.11.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r--arch/x86/kernel/apic/apic.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 75bd5ac7ac..a04a5163e5 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1808,7 +1808,7 @@ void x2apic_setup(void)
__x2apic_enable();
}
-static __init void apic_set_fixmap(void);
+static __init void apic_set_fixmap(bool read_apic);
static __init void x2apic_disable(void)
{
@@ -1830,7 +1830,12 @@ static __init void x2apic_disable(void)
}
__x2apic_disable();
- apic_set_fixmap();
+ /*
+ * Don't reread the APIC ID as it was already done from
+ * check_x2apic() and the APIC driver still is a x2APIC variant,
+ * which fails to do the read after x2APIC was disabled.
+ */
+ apic_set_fixmap(false);
}
static __init void x2apic_enable(void)
@@ -2095,13 +2100,14 @@ void __init init_apic_mappings(void)
}
}
-static __init void apic_set_fixmap(void)
+static __init void apic_set_fixmap(bool read_apic)
{
set_fixmap_nocache(FIX_APIC_BASE, mp_lapic_addr);
apic_mmio_base = APIC_BASE;
apic_printk(APIC_VERBOSE, "mapped APIC to %16lx (%16lx)\n",
apic_mmio_base, mp_lapic_addr);
- apic_read_boot_cpu_id(false);
+ if (read_apic)
+ apic_read_boot_cpu_id(false);
}
void __init register_lapic_address(unsigned long address)
@@ -2111,7 +2117,7 @@ void __init register_lapic_address(unsigned long address)
mp_lapic_addr = address;
if (!x2apic_mode)
- apic_set_fixmap();
+ apic_set_fixmap(true);
}
/*