Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758127AbYFSPOR (ORCPT ); Thu, 19 Jun 2008 11:14:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753175AbYFSPOF (ORCPT ); Thu, 19 Jun 2008 11:14:05 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:54522 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752299AbYFSPOE (ORCPT ); Thu, 19 Jun 2008 11:14:04 -0400 Date: Thu, 19 Jun 2008 17:13:33 +0200 From: Ingo Molnar To: Linus Torvalds Cc: linux-kernel@vger.kernel.org, the arch/x86 maintainers Subject: [git pull] x86 fixes Message-ID: <20080619151333.GA8952@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.18 (2008-05-17) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5489 Lines: 186 Linus, please pull the latest x86 fixes git tree from: git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git x86-fixes-for-linus Thanks, Ingo ------------------> Bernhard Walle (1): x86: use BOOTMEM_EXCLUSIVE on 32-bit Jeremy Fitzhardinge (1): x86: set PAE PHYSICAL_MASK_SHIFT to 44 bits. Jordan Crouse (1): x86, geode: add a VSA2 ID for General Software Mikael Pettersson (1): x86, 32-bit: fix boot failure on TSC-less processors Suresh Siddha (1): x86: fix NULL pointer deref in __switch_to arch/x86/kernel/geode_32.c | 5 ++++- arch/x86/kernel/process_32.c | 1 + arch/x86/kernel/process_64.c | 1 + arch/x86/kernel/setup_32.c | 10 ++++++++-- arch/x86/kernel/tsc_32.c | 18 ++++++++---------- include/asm-x86/geode.h | 4 ++-- include/asm-x86/page_32.h | 3 ++- 7 files changed, 26 insertions(+), 16 deletions(-) diff --git a/arch/x86/kernel/geode_32.c b/arch/x86/kernel/geode_32.c index e8edd63..9b08e85 100644 --- a/arch/x86/kernel/geode_32.c +++ b/arch/x86/kernel/geode_32.c @@ -166,6 +166,8 @@ int geode_has_vsa2(void) static int has_vsa2 = -1; if (has_vsa2 == -1) { + u16 val; + /* * The VSA has virtual registers that we can query for a * signature. @@ -173,7 +175,8 @@ int geode_has_vsa2(void) outw(VSA_VR_UNLOCK, VSA_VRC_INDEX); outw(VSA_VR_SIGNATURE, VSA_VRC_INDEX); - has_vsa2 = (inw(VSA_VRC_DATA) == VSA_SIG); + val = inw(VSA_VRC_DATA); + has_vsa2 = (val == AMD_VSA_SIG || val == GSW_VSA_SIG); } return has_vsa2; diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c index 6d54833..e2db9ac 100644 --- a/arch/x86/kernel/process_32.c +++ b/arch/x86/kernel/process_32.c @@ -333,6 +333,7 @@ void flush_thread(void) /* * Forget coprocessor state.. */ + tsk->fpu_counter = 0; clear_fpu(tsk); clear_used_math(); } diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index ac54ff5..c6eb5c9 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -294,6 +294,7 @@ void flush_thread(void) /* * Forget coprocessor state.. */ + tsk->fpu_counter = 0; clear_fpu(tsk); clear_used_math(); } diff --git a/arch/x86/kernel/setup_32.c b/arch/x86/kernel/setup_32.c index 2c5f8b2..5a2f8e0 100644 --- a/arch/x86/kernel/setup_32.c +++ b/arch/x86/kernel/setup_32.c @@ -532,10 +532,16 @@ static void __init reserve_crashkernel(void) (unsigned long)(crash_size >> 20), (unsigned long)(crash_base >> 20), (unsigned long)(total_mem >> 20)); + + if (reserve_bootmem(crash_base, crash_size, + BOOTMEM_EXCLUSIVE) < 0) { + printk(KERN_INFO "crashkernel reservation " + "failed - memory is in use\n"); + return; + } + crashk_res.start = crash_base; crashk_res.end = crash_base + crash_size - 1; - reserve_bootmem(crash_base, crash_size, - BOOTMEM_DEFAULT); } else printk(KERN_INFO "crashkernel reservation failed - " "you have to specify a base address\n"); diff --git a/arch/x86/kernel/tsc_32.c b/arch/x86/kernel/tsc_32.c index 068759d..65b7063 100644 --- a/arch/x86/kernel/tsc_32.c +++ b/arch/x86/kernel/tsc_32.c @@ -14,7 +14,10 @@ #include "mach_timer.h" -static int tsc_disabled; +/* native_sched_clock() is called before tsc_init(), so + we must start with the TSC soft disabled to prevent + erroneous rdtsc usage on !cpu_has_tsc processors */ +static int tsc_disabled = -1; /* * On some systems the TSC frequency does not @@ -402,25 +405,20 @@ void __init tsc_init(void) { int cpu; - if (!cpu_has_tsc || tsc_disabled) { - /* Disable the TSC in case of !cpu_has_tsc */ - tsc_disabled = 1; + if (!cpu_has_tsc || tsc_disabled > 0) return; - } cpu_khz = calculate_cpu_khz(); tsc_khz = cpu_khz; if (!cpu_khz) { mark_tsc_unstable("could not calculate TSC khz"); - /* - * We need to disable the TSC completely in this case - * to prevent sched_clock() from using it. - */ - tsc_disabled = 1; return; } + /* now allow native_sched_clock() to use rdtsc */ + tsc_disabled = 0; + printk("Detected %lu.%03lu MHz processor.\n", (unsigned long)cpu_khz / 1000, (unsigned long)cpu_khz % 1000); diff --git a/include/asm-x86/geode.h b/include/asm-x86/geode.h index 6e64588..bb06027 100644 --- a/include/asm-x86/geode.h +++ b/include/asm-x86/geode.h @@ -112,8 +112,8 @@ extern int geode_get_dev_base(unsigned int dev); #define VSA_VR_UNLOCK 0xFC53 /* unlock virtual register */ #define VSA_VR_SIGNATURE 0x0003 #define VSA_VR_MEM_SIZE 0x0200 -#define VSA_SIG 0x4132 /* signature is ascii 'VSA2' */ - +#define AMD_VSA_SIG 0x4132 /* signature is ascii 'VSA2' */ +#define GSW_VSA_SIG 0x534d /* General Software signature */ /* GPIO */ #define GPIO_OUTPUT_VAL 0x00 diff --git a/include/asm-x86/page_32.h b/include/asm-x86/page_32.h index 424e82f..ccf0ba3 100644 --- a/include/asm-x86/page_32.h +++ b/include/asm-x86/page_32.h @@ -14,7 +14,8 @@ #define __PAGE_OFFSET _AC(CONFIG_PAGE_OFFSET, UL) #ifdef CONFIG_X86_PAE -#define __PHYSICAL_MASK_SHIFT 36 +/* 44=32+12, the limit we can fit into an unsigned long pfn */ +#define __PHYSICAL_MASK_SHIFT 44 #define __VIRTUAL_MASK_SHIFT 32 #define PAGETABLE_LEVELS 3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/