From be274eeaf20b4c7155242645d5e2c48b023e609b Mon Sep 17 00:00:00 2001 From: Vivek Goyal Date: Thu, 7 Dec 2006 02:14:04 +0100 Subject: [PATCH] i386: extend bzImage protocol for relocatable protected mode kernel Extend bzImage protocol to enable bootloaders to load a completely relocatable bzImage. Now protected mode component of kernel is also relocatable and a boot-loader can load the protected mode component at a differnt physical address than 1MB. (If kernel was built with CONFIG_RELOCATABLE) Kexec can make use of it to load this kernel at a different physical address to capture kernel crash dumps. Signed-off-by: Vivek Goyal Signed-off-by: Andi Kleen Cc: Andi Kleen Signed-off-by: Andrew Morton --- Documentation/i386/boot.txt | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'Documentation') diff --git a/Documentation/i386/boot.txt b/Documentation/i386/boot.txt index c51314b..cb28254 100644 --- a/Documentation/i386/boot.txt +++ b/Documentation/i386/boot.txt @@ -35,6 +35,8 @@ Protocol 2.03: (Kernel 2.4.18-pre1) Explicitly makes the highest possible initrd address available to the bootloader. Protocol 2.04: (Kernel 2.6.14) Extend the syssize field to four bytes. +Protocol 2.05: (Kernel 2.6.20) Make protected mode kernel relocatable. + Introduce relocatable_kernel and kernel_alignment fields. **** MEMORY LAYOUT @@ -129,6 +131,8 @@ Offset Proto Name Meaning 0226/2 N/A pad1 Unused 0228/4 2.02+ cmd_line_ptr 32-bit pointer to the kernel command line 022C/4 2.03+ initrd_addr_max Highest legal initrd address +0230/4 2.04+ kernel_alignment Physical addr alignment required for kernel +0234/1 2.04+ relocatable_kernel Whether kernel is relocatable or not (1) For backwards compatibility, if the setup_sects field contains 0, the real value is 4. -- cgit v1.1 From b026872601976f666bae77b609dc490d1834bf77 Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Thu, 7 Dec 2006 02:14:06 +0100 Subject: [PATCH] x86-64: Try multiple timer variants in check_timer Instead of adding all kinds of more quirks try various timer routing variants in check_timer. In particular this tries to handle quirks from: - Nvidia NF2-4 reference BIOS: wrong timer override - Asus: Wrong timer override but no HPET table - ATI: require timer disabled in 8259 - Some boards: require timer enabled in 8259 We just try many of the the known variants in the hopefully right order in check_timer. Trying pin 0/2 on Nvidia suggested by Tim Hockin. TBD Experimental. Needs a lot of testing Signed-off-by: Andi Kleen --- Documentation/x86_64/boot-options.txt | 4 ---- 1 file changed, 4 deletions(-) (limited to 'Documentation') diff --git a/Documentation/x86_64/boot-options.txt b/Documentation/x86_64/boot-options.txt index f3c57f4..ab9b1c0 100644 --- a/Documentation/x86_64/boot-options.txt +++ b/Documentation/x86_64/boot-options.txt @@ -52,10 +52,6 @@ APICs apicmaintimer. Useful when your PIT timer is totally broken. - disable_8254_timer / enable_8254_timer - Enable interrupt 0 timer routing over the 8254 in addition to over - the IO-APIC. The kernel tries to set a sensible default. - Early Console syntax: earlyprintk=vga -- cgit v1.1 From bff6547bb6a4e82c399d74e7fba78b12d2f162ed Mon Sep 17 00:00:00 2001 From: Muli Ben-Yehuda Date: Thu, 7 Dec 2006 02:14:07 +0100 Subject: [PATCH] Calgary: allow compiling Calgary in but not using it by default This patch makes it possible to compile Calgary in but not use it by default. In this mode, use 'iommu=calgary' to activate it. Signed-off-by: Muli Ben-Yehuda Signed-off-by: Jon Mason Signed-off-by: Andi Kleen --- Documentation/x86_64/boot-options.txt | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'Documentation') diff --git a/Documentation/x86_64/boot-options.txt b/Documentation/x86_64/boot-options.txt index ab9b1c0..dbdcaf6 100644 --- a/Documentation/x86_64/boot-options.txt +++ b/Documentation/x86_64/boot-options.txt @@ -179,7 +179,7 @@ PCI IOMMU iommu=[size][,noagp][,off][,force][,noforce][,leak][,memaper[=order]][,merge] - [,forcesac][,fullflush][,nomerge][,noaperture] + [,forcesac][,fullflush][,nomerge][,noaperture][,calgary] size set size of iommu (in bytes) noagp don't initialize the AGP driver and use full aperture. off don't use the IOMMU @@ -200,6 +200,7 @@ IOMMU buffering. nodac Forbid DMA >4GB panic Always panic when IOMMU overflows + calgary Use the Calgary IOMMU if it is available swiotlb=pages[,force] -- cgit v1.1 From 8542b200cbe5609edd7aae0c304c091a1c290452 Mon Sep 17 00:00:00 2001 From: Zachary Amsden Date: Thu, 7 Dec 2006 02:14:09 +0100 Subject: [PATCH] paravirt: Add option to allow skipping the timer check Add a way to disable the timer IRQ routing check via a boot option. The VMI timer code uses this to avoid triggering the pester Mingo code, which probes for some very unusual and broken motherboard routings. It fires 100% of the time when using a paravirtual delay mechanism instead of using a realtime delay, since there is no elapsed real time, and the 4 timer IRQs have not yet been delivered. In addition, it is entirely possible, though improbable, that this bug could surface on real hardware which picks a particularly bad time to enter SMM mode, causing a long latency during one of the timer IRQs. While here, make check_timer be __init. Signed-off-by: Zachary Amsden Signed-off-by: Andi Kleen [chrisw: use no_timer_check to bring inline with x86_64 as per Andi's request] Signed-off-by: Chris Wright Cc: Andi Kleen Signed-off-by: Andrew Morton --- Documentation/kernel-parameters.txt | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'Documentation') diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 2e1898e..4e90aa4 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -599,8 +599,6 @@ and is between 256 and 4096 characters. It is defined in the file hugepages= [HW,IA-32,IA-64] Maximal number of HugeTLB pages. - noirqbalance [IA-32,SMP,KNL] Disable kernel irq balancing - i8042.direct [HW] Put keyboard port into non-translated mode i8042.dumbkbd [HW] Pretend that controller can only read data from keyboard and cannot control its state @@ -1052,9 +1050,14 @@ and is between 256 and 4096 characters. It is defined in the file in certain environments such as networked servers or real-time systems. + noirqbalance [IA-32,SMP,KNL] Disable kernel irq balancing + noirqdebug [IA-32] Disables the code which attempts to detect and disable unhandled interrupt sources. + no_timer_check [IA-32,X86_64,APIC] Disables the code which tests for + broken timer IRQ sources. + noisapnp [ISAPNP] Disables ISA PnP code. noinitrd [RAM] Tells the kernel not to load any configured -- cgit v1.1 From 0741f4d207a644482d7a040f05cd264c98cf7ee8 Mon Sep 17 00:00:00 2001 From: Chuck Ebbert <76306.1226@compuserve.com> Date: Thu, 7 Dec 2006 02:14:11 +0100 Subject: [PATCH] x86: add sysctl for kstack_depth_to_print Add sysctl for kstack_depth_to_print. This lets users change the amount of raw stack data printed in dump_stack() without having to reboot. Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by: Andi Kleen --- Documentation/sysctl/kernel.txt | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'Documentation') diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt index 0bc7f1e..5922e84 100644 --- a/Documentation/sysctl/kernel.txt +++ b/Documentation/sysctl/kernel.txt @@ -27,6 +27,7 @@ show up in /proc/sys/kernel: - hotplug - java-appletviewer [ binfmt_java, obsolete ] - java-interpreter [ binfmt_java, obsolete ] +- kstack_depth_to_print [ X86 only ] - l2cr [ PPC only ] - modprobe ==> Documentation/kmod.txt - msgmax @@ -170,6 +171,13 @@ This flag controls the L2 cache of G3 processor boards. If ============================================================== +kstack_depth_to_print: (X86 only) + +Controls the number of words to print when dumping the raw +kernel stack. + +============================================================== + osrelease, ostype & version: # cat osrelease -- cgit v1.1 From a1a70c25bed75ed36ed48bbe18b9029428d2452d Mon Sep 17 00:00:00 2001 From: Adrian Bunk Date: Thu, 7 Dec 2006 02:14:12 +0100 Subject: [PATCH] i386: always enable regparm -mregparm=3 has been enabled by default for some time on i386, and AFAIK there aren't any problems with it left. This patch removes the REGPARM config option and sets -mregparm=3 unconditionally. Signed-off-by: Adrian Bunk Signed-off-by: Andi Kleen --- Documentation/stable_api_nonsense.txt | 3 --- 1 file changed, 3 deletions(-) (limited to 'Documentation') diff --git a/Documentation/stable_api_nonsense.txt b/Documentation/stable_api_nonsense.txt index f39c9d7..a2afca3 100644 --- a/Documentation/stable_api_nonsense.txt +++ b/Documentation/stable_api_nonsense.txt @@ -62,9 +62,6 @@ consider the following facts about the Linux kernel: - different structures can contain different fields - Some functions may not be implemented at all, (i.e. some locks compile away to nothing for non-SMP builds.) - - Parameter passing of variables from function to function can be - done in different ways (the CONFIG_REGPARM option controls - this.) - Memory within the kernel can be aligned in different ways, depending on the build options. - Linux runs on a wide range of different processor architectures. -- cgit v1.1 From 6d0185ea611276fdf81991d7774d396bdc1ae392 Mon Sep 17 00:00:00 2001 From: Jan Beulich Date: Thu, 7 Dec 2006 02:14:13 +0100 Subject: [PATCH] unwinder: Add debugging output to the Dwarf2 unwinder Add debugging printks to the unwinder to allow easier debugging when something goes wrong with it. This can be controlled with the new unwinder_debug=N option Most output is given by N=1 AK: Added documentation of unwinder_debug= Signed-off-by: Jan Beulich Signed-off-by: Andi Kleen --- Documentation/kernel-parameters.txt | 3 +++ 1 file changed, 3 insertions(+) (limited to 'Documentation') diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 4e90aa4..d34fd6a 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1735,6 +1735,9 @@ and is between 256 and 4096 characters. It is defined in the file norandmaps Don't use address space randomization Equivalent to echo 0 > /proc/sys/kernel/randomize_va_space + unwind_debug=N N > 0 will enable dwarf2 unwinder debugging + This is useful to get more information why + you got a "dwarf2 unwinder stuck" ______________________________________________________________________ -- cgit v1.1 From d263b213577a1e8f166b0a7212d85175e36d6c19 Mon Sep 17 00:00:00 2001 From: Vivek Goyal Date: Thu, 7 Dec 2006 02:14:13 +0100 Subject: [PATCH] x86-64: Correct documentation for bzImage protocol v2.05 Correct the documentation for bzImage protocol extension due to relocatable bzImage. Signed-off-by: Vivek Goyal Signed-off-by: Andi Kleen Cc: Andi Kleen Acked-by: "H. Peter Anvin" Signed-off-by: Andrew Morton --- Documentation/i386/boot.txt | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'Documentation') diff --git a/Documentation/i386/boot.txt b/Documentation/i386/boot.txt index cb28254..9575de3 100644 --- a/Documentation/i386/boot.txt +++ b/Documentation/i386/boot.txt @@ -2,7 +2,7 @@ ---------------------------- H. Peter Anvin - Last update 2005-09-02 + Last update 2006-11-17 On the i386 platform, the Linux kernel uses a rather complicated boot convention. This has evolved partially due to historical aspects, as @@ -131,8 +131,8 @@ Offset Proto Name Meaning 0226/2 N/A pad1 Unused 0228/4 2.02+ cmd_line_ptr 32-bit pointer to the kernel command line 022C/4 2.03+ initrd_addr_max Highest legal initrd address -0230/4 2.04+ kernel_alignment Physical addr alignment required for kernel -0234/1 2.04+ relocatable_kernel Whether kernel is relocatable or not +0230/4 2.05+ kernel_alignment Physical addr alignment required for kernel +0234/1 2.05+ relocatable_kernel Whether kernel is relocatable or not (1) For backwards compatibility, if the setup_sects field contains 0, the real value is 4. -- cgit v1.1