This patch adds huge page support to allow userspace to allocate huge pages and to use hugetlbfs filesystem on 32- and 64-bit Linux kernels. A later patch will add kernel support to map kernel text and data on huge pages. The only requirement is, that the kernel needs to be compiled for a PA8X00 CPU (PA2.0 architecture). Older PA1.X CPUs do not support variable page sizes. 64bit Kernels are compiled for PA2.0 by default. Technically on parisc multiple physical huge pages may be needed to emulate standard 2MB huge pages. Signed-off-by: Helge Deller <deller@gmx.de>
A fault vector on parisc needs to be 2K aligned. Furthermore the checksum of the fault vector needs to sum up to 0 which is being calculated and written at runtime. Up to now we aligned both PA20 and PA11 fault vectors on the same 4K page in order to easily write the checksum after having mapped the kernel read-only (by mapping this page only as read-write). But when we want to map the kernel text and data on huge pages this makes things harder. So, simplify it by aligning both fault vectors on 2K boundries and write the checksum before we map the page read-only. Signed-off-by: Helge Deller <deller@gmx.de>
In case we fail to power up other CPUs in a SMP system, the kernel currently shows a wrong number of online CPUs. This change makes the output more verbose on how many of the CPUs are online. Example: CPU(s): 1 out of 2 PA8800 (Mako) at 900.000000 MHz online. Signed-off-by: Helge Deller <deller@gmx.de>
'boot_args' is an input args, and 'boot_command_line' has a fix length. So use strlcpy() instead of strcpy() to avoid memory overflow. Signed-off-by: Chen Gang <gang.chen@asianux.com> Acked-by: Kyle McMartin <kyle@mcmartin.ca> Signed-off-by: Helge Deller <deller@gmx.de>
Impact:
1:convert all remain take_over_console to do_take_over_console
2:update take_over_console to do_take_over_console in comment
Commit dc9641895abb ("vt: delete unneeded functions
register_con_driver|take_over_console") delete take_over_console,
but forget to convert remain take_over_console's users to new API
do_take_over_console, this patch fix it.
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Wang YanQing <udknight@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This patch fixes partly PAGE_SIZEs of 16K or 64K by adjusting the assembler PTE lookup code and the assembler TEMPALIAS code. Furthermore some data alignments for PAGE_SIZE have been limited to 4K (or less) to not waste too much memory with greater page sizes. As a side note, the palo loader can (currently) only handle up to 10 ELF segments which is fixed with tighter aligning as well. My testings indicated that the ldci command in the sba iommu coding needed adjustment by the PAGE_SHIFT value and that the I/O PDIR Page size was only set to 4K for my machine (C3000). All this fixes partly the boot, but there are still quite some caching problems left. Examples are e.g. the symbios logic driver which is failing: sym0: <896> rev 0x7 at pci 0000:00:0f.0 irq 69 sym0: PA-RISC Firmware, ID 7, Fast-40, SE, parity checking CACHE TEST FAILED: DMA error (dstat=0x81).sym0: CACHE INCORRECTLY CONFIGURED. and the tulip network driver which doesn't seem to work correctly either: Sending BOOTP requests .net eth0: Setting full-duplex based on MII#1 link partner capability of 05e1 ..... timed out! Beside those kernel fixes glibc will need fixes too to be able to handle >4K page sizes. Signed-off-by: Helge Deller <deller@gmx.de>
These guys were getting it implicitly via module.h before, when module.h was everywhere. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Alexander Beregalov <a.beregalov@gmail.com> Acked-by: Matthew Wilcox <willy@linux.intel.com> Acked-by: Grant Grundler <grundler@parisc-linux.org> Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
parisc: Replace most arrays sized by NR_CPUS with percpu variables. Signed-off-by: Helge Deller <deller@gmx.de> Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>