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Message-ID: <20071203163808.GA12157@elte.hu>
Date: Mon, 3 Dec 2007 17:38:08 +0100
From: Ingo Molnar <mingo@...e.hu>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org,
Andrew Morton <akpm@...ux-foundation.org>,
Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>
Subject: Re: [git pull] x86 fixes
* Linus Torvalds <torvalds@...ux-foundation.org> wrote:
> > Linus, please pull the latest x86 git tree from:
> >
> > git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-x86.git
>
> Ingo, there is no such tree on kernel.org. Forgot to push it out?
hm, i found the reason - a wrong URI made it into the pull request. The
correct uri is to the shared x86 tree:
git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86.git
NOTE: i've meanwhile finished the testing of another fixlet so it's 3
patches - i've re-pushed the whole tree because i first thought i forgot
the pull. The pull request email is below.
Ingo
---------------------------->
Linus, please pull the latest x86 git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86.git
Thanks!
Ingo
------------------>
Eric W. Biederman (1):
x86: fix x86-32 early fixmap initialization.
OGAWA Hirofumi (2):
x86: disable hpet on shutdown
x86: disable hpet legacy replacement for kdump
arch/x86/kernel/crash.c | 4 ++++
arch/x86/kernel/head_32.S | 12 ++++++------
arch/x86/kernel/hpet.c | 14 ++++++++++++++
arch/x86/kernel/reboot_32.c | 4 ++++
arch/x86/kernel/reboot_64.c | 4 ++++
include/asm-x86/hpet.h | 1 +
6 files changed, 33 insertions(+), 6 deletions(-)
diff --git a/arch/x86/kernel/crash.c b/arch/x86/kernel/crash.c
index 8bb482f..9a5fa0a 100644
--- a/arch/x86/kernel/crash.c
+++ b/arch/x86/kernel/crash.c
@@ -22,6 +22,7 @@
#include <asm/nmi.h>
#include <asm/hw_irq.h>
#include <asm/apic.h>
+#include <asm/hpet.h>
#include <linux/kdebug.h>
#include <asm/smp.h>
@@ -140,5 +141,8 @@ void machine_crash_shutdown(struct pt_regs *regs)
#if defined(CONFIG_X86_IO_APIC)
disable_IO_APIC();
#endif
+#ifdef CONFIG_HPET_TIMER
+ hpet_disable();
+#endif
crash_save_cpu(regs, safe_smp_processor_id());
}
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
index 374b7ec..ac0637a 100644
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -193,6 +193,12 @@ default_entry:
jb 10b
movl %edi,(init_pg_tables_end - __PAGE_OFFSET)
+ /* Do an early initialization of the fixmap area */
+ movl $(swapper_pg_dir - __PAGE_OFFSET), %edx
+ movl $(swapper_pg_pmd - __PAGE_OFFSET), %eax
+ addl $0x007, %eax /* 0x007 = PRESENT+RW+USER */
+ movl %eax, 4092(%edx)
+
xorl %ebx,%ebx /* This is the boot CPU (BSP) */
jmp 3f
/*
@@ -208,12 +214,6 @@ default_entry:
.section .init.text,"ax",@progbits
#endif
- /* Do an early initialization of the fixmap area */
- movl $(swapper_pg_dir - __PAGE_OFFSET), %edx
- movl $(swapper_pg_pmd - __PAGE_OFFSET), %eax
- addl $0x007, %eax /* 0x007 = PRESENT+RW+USER */
- movl %eax, 4092(%edx)
-
#ifdef CONFIG_SMP
ENTRY(startup_32_smp)
cld
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index 53303f2..4a86ffd 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -446,6 +446,20 @@ static __init int hpet_late_init(void)
}
fs_initcall(hpet_late_init);
+void hpet_disable(void)
+{
+ if (is_hpet_capable()) {
+ unsigned long cfg = hpet_readl(HPET_CFG);
+
+ if (hpet_legacy_int_enabled) {
+ cfg &= ~HPET_CFG_LEGACY;
+ hpet_legacy_int_enabled = 0;
+ }
+ cfg &= ~HPET_CFG_ENABLE;
+ hpet_writel(cfg, HPET_CFG);
+ }
+}
+
#ifdef CONFIG_HPET_EMULATE_RTC
/* HPET in LegacyReplacement Mode eats up RTC interrupt line. When, HPET
diff --git a/arch/x86/kernel/reboot_32.c b/arch/x86/kernel/reboot_32.c
index 9e2269d..bb1a0f8 100644
--- a/arch/x86/kernel/reboot_32.c
+++ b/arch/x86/kernel/reboot_32.c
@@ -11,6 +11,7 @@
#include <linux/reboot.h>
#include <asm/uaccess.h>
#include <asm/apic.h>
+#include <asm/hpet.h>
#include <asm/desc.h>
#include "mach_reboot.h"
#include <asm/reboot_fixups.h>
@@ -326,6 +327,9 @@ static void native_machine_shutdown(void)
#ifdef CONFIG_X86_IO_APIC
disable_IO_APIC();
#endif
+#ifdef CONFIG_HPET_TIMER
+ hpet_disable();
+#endif
}
void __attribute__((weak)) mach_reboot_fixups(void)
diff --git a/arch/x86/kernel/reboot_64.c b/arch/x86/kernel/reboot_64.c
index 71b13c5..53620a9 100644
--- a/arch/x86/kernel/reboot_64.c
+++ b/arch/x86/kernel/reboot_64.c
@@ -17,6 +17,7 @@
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
#include <asm/apic.h>
+#include <asm/hpet.h>
#include <asm/gart.h>
/*
@@ -113,6 +114,9 @@ void machine_shutdown(void)
disable_IO_APIC();
+#ifdef CONFIG_HPET_TIMER
+ hpet_disable();
+#endif
local_irq_restore(flags);
pci_iommu_shutdown();
diff --git a/include/asm-x86/hpet.h b/include/asm-x86/hpet.h
index b1f3c1e..ad8d6e7 100644
--- a/include/asm-x86/hpet.h
+++ b/include/asm-x86/hpet.h
@@ -61,6 +61,7 @@ extern unsigned long force_hpet_address;
extern int hpet_force_user;
extern int is_hpet_enabled(void);
extern int hpet_enable(void);
+extern void hpet_disable(void);
extern unsigned long hpet_readl(unsigned long a);
extern void force_hpet_resume(void);
--
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