| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <tip-374aab339f10f0510cec0e79d752d31d84b08aa2@git.kernel.org>
Date: Thu, 22 Jan 2015 06:31:48 -0800
From: tip-bot for Thomas Gleixner <tipbot@...or.com>
To: linux-tip-commits@...r.kernel.org
Cc: bp@...en8.de, joro@...tes.org, tony.luck@...el.com,
jiang.liu@...ux.intel.com, linux-kernel@...r.kernel.org,
hpa@...or.com, mingo@...nel.org, tglx@...utronix.de
Subject: [tip:x86/apic] x86/apic: Reuse apic_bsp_setup() for UP APIC setup
Commit-ID: 374aab339f10f0510cec0e79d752d31d84b08aa2
Gitweb: http://git.kernel.org/tip/374aab339f10f0510cec0e79d752d31d84b08aa2
Author: Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Thu, 15 Jan 2015 21:22:44 +0000
Committer: Thomas Gleixner <tglx@...utronix.de>
CommitDate: Thu, 22 Jan 2015 15:10:56 +0100
x86/apic: Reuse apic_bsp_setup() for UP APIC setup
Extend apic_bsp_setup() so the same code flow can be used for
APIC_init_uniprocessor().
Folded Jiangs fix to provide proper ordering of the UP setup.
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Jiang Liu <jiang.liu@...ux.intel.com>
Cc: Joerg Roedel <joro@...tes.org>
Cc: Tony Luck <tony.luck@...el.com>
Cc: Borislav Petkov <bp@...en8.de>
Link: http://lkml.kernel.org/r/20150115211704.084765674@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
arch/x86/include/asm/apic.h | 2 +-
arch/x86/kernel/apic/apic.c | 53 +++++++++++++++++++--------------------------
arch/x86/kernel/smpboot.c | 4 ++--
3 files changed, 25 insertions(+), 34 deletions(-)
diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index 92f3404..92003f3 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -215,7 +215,7 @@ extern void setup_secondary_APIC_clock(void);
extern int APIC_init_uniprocessor(void);
extern int apic_force_enable(unsigned long addr);
-extern int apic_bsp_setup(void);
+extern int apic_bsp_setup(bool upmode);
extern void apic_ap_setup(void);
/*
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 0a41070..437c35b 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -2202,27 +2202,37 @@ void __init apic_set_eoi_write(void (*eoi_write)(u32 reg, u32 v))
}
}
-static void __init bsp_end_local_APIC_setup(void)
+static void __init apic_bsp_up_setup(void)
{
- end_local_APIC_setup();
+#ifdef CONFIG_X86_64
+ apic_write(APIC_ID, SET_APIC_ID(boot_cpu_physical_apicid));
+#else
/*
- * Now that local APIC setup is completed for BP, configure the fault
- * handling for interrupt remapping.
+ * Hack: In case of kdump, after a crash, kernel might be booting
+ * on a cpu with non-zero lapic id. But boot_cpu_physical_apicid
+ * might be zero if read from MP tables. Get it from LAPIC.
*/
- irq_remap_enable_fault_handling();
+# ifdef CONFIG_CRASH_DUMP
+ boot_cpu_physical_apicid = read_apic_id();
+# endif
+#endif
+ physid_set_mask_of_physid(boot_cpu_physical_apicid, &phys_cpu_present_map);
}
/**
* apic_bsp_setup - Setup function for local apic and io-apic
+ * @upmode: Force UP mode (for APIC_init_uniprocessor)
*
* Returns:
* apic_id of BSP APIC
*/
-int __init apic_bsp_setup(void)
+int __init apic_bsp_setup(bool upmode)
{
int id;
connect_bsp_APIC();
+ if (upmode)
+ apic_bsp_up_setup();
setup_local_APIC();
if (x2apic_mode)
@@ -2231,7 +2241,8 @@ int __init apic_bsp_setup(void)
id = GET_APIC_LOGICAL_ID(apic_read(APIC_LDR));
enable_IO_APIC();
- bsp_end_local_APIC_setup();
+ end_local_APIC_setup();
+ irq_remap_enable_fault_handling();
setup_IO_APIC();
return id;
}
@@ -2267,32 +2278,12 @@ int __init APIC_init_uniprocessor(void)
}
#endif
- default_setup_apic_routing();
+ if (!smp_found_config)
+ disable_ioapic_support();
+ default_setup_apic_routing();
verify_local_APIC();
- connect_bsp_APIC();
-
-#ifdef CONFIG_X86_64
- apic_write(APIC_ID, SET_APIC_ID(boot_cpu_physical_apicid));
-#else
- /*
- * Hack: In case of kdump, after a crash, kernel might be booting
- * on a cpu with non-zero lapic id. But boot_cpu_physical_apicid
- * might be zero if read from MP tables. Get it from LAPIC.
- */
-# ifdef CONFIG_CRASH_DUMP
- boot_cpu_physical_apicid = read_apic_id();
-# endif
-#endif
- physid_set_mask_of_physid(boot_cpu_physical_apicid, &phys_cpu_present_map);
- setup_local_APIC();
-
- if (smp_found_config)
- enable_IO_APIC();
-
- bsp_end_local_APIC_setup();
-
- setup_IO_APIC();
+ apic_bsp_setup(true);
x86_init.timers.setup_percpu_clockev();
return 0;
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index fe8783d..0a46e5e 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1147,7 +1147,7 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
return;
case SMP_FORCE_UP:
disable_smp();
- apic_bsp_setup();
+ apic_bsp_setup(false);
return;
case SMP_OK:
break;
@@ -1161,7 +1161,7 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
/* Or can we switch back to PIC here? */
}
- cpu0_logical_apicid = apic_bsp_setup();
+ cpu0_logical_apicid = apic_bsp_setup(false);
/*
* Set up local APIC timer on boot CPU.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists