Revision 494e5b6faeda1d1e830a13e10b3c7bc323f35d97 authored by Khalid Aziz on 27 May 2015, 16:00:46 UTC, committed by David S. Miller on 01 June 2015, 05:15:01 UTC
sparc: Resolve conflict between sparc v9 and M7 on usage of bit 9 of TTE Bit 9 of TTE is CV (Cacheable in V-cache) on sparc v9 processor while the same bit 9 is MCDE (Memory Corruption Detection Enable) on M7 processor. This creates a conflicting usage of the same bit. Kernel sets TTE.cv bit on all pages for sun4v architecture which works well for sparc v9 but enables memory corruption detection on M7 processor which is not the intent. This patch adds code to determine if kernel is running on M7 processor and takes steps to not enable memory corruption detection in TTE erroneously. Signed-off-by: Khalid Aziz <khalid.aziz@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent f0c1a11
headers_check.pl
#!/usr/bin/perl -w
#
# headers_check.pl execute a number of trivial consistency checks
#
# Usage: headers_check.pl dir arch [files...]
# dir: dir to look for included files
# arch: architecture
# files: list of files to check
#
# The script reads the supplied files line by line and:
#
# 1) for each include statement it checks if the
# included file actually exists.
# Only include files located in asm* and linux* are checked.
# The rest are assumed to be system include files.
#
# 2) It is checked that prototypes does not use "extern"
#
# 3) Check for leaked CONFIG_ symbols
use strict;
use File::Basename;
my ($dir, $arch, @files) = @ARGV;
my $ret = 0;
my $line;
my $lineno = 0;
my $filename;
foreach my $file (@files) {
$filename = $file;
open(my $fh, '<', $filename)
or die "$filename: $!\n";
$lineno = 0;
while ($line = <$fh>) {
$lineno++;
&check_include();
&check_asm_types();
&check_sizetypes();
&check_declarations();
# Dropped for now. Too much noise &check_config();
}
close $fh;
}
exit $ret;
sub check_include
{
if ($line =~ m/^\s*#\s*include\s+<((asm|linux).*)>/) {
my $inc = $1;
my $found;
$found = stat($dir . "/" . $inc);
if (!$found) {
$inc =~ s#asm/#asm-$arch/#;
$found = stat($dir . "/" . $inc);
}
if (!$found) {
printf STDERR "$filename:$lineno: included file '$inc' is not exported\n";
$ret = 1;
}
}
}
sub check_declarations
{
# soundcard.h is what it is
if ($line =~ m/^void seqbuf_dump\(void\);/) {
return;
}
if ($line =~ m/^(\s*extern|unsigned|char|short|int|long|void)\b/) {
printf STDERR "$filename:$lineno: " .
"userspace cannot reference function or " .
"variable defined in the kernel\n";
}
}
sub check_config
{
if ($line =~ m/[^a-zA-Z0-9_]+CONFIG_([a-zA-Z0-9_]+)[^a-zA-Z0-9_]/) {
printf STDERR "$filename:$lineno: leaks CONFIG_$1 to userspace where it is not valid\n";
}
}
my $linux_asm_types;
sub check_asm_types
{
if ($filename =~ /types.h|int-l64.h|int-ll64.h/o) {
return;
}
if ($lineno == 1) {
$linux_asm_types = 0;
} elsif ($linux_asm_types >= 1) {
return;
}
if ($line =~ m/^\s*#\s*include\s+<asm\/types.h>/) {
$linux_asm_types = 1;
printf STDERR "$filename:$lineno: " .
"include of <linux/types.h> is preferred over <asm/types.h>\n"
# Warn until headers are all fixed
#$ret = 1;
}
}
my $linux_types;
my %import_stack = ();
sub check_include_typesh
{
my $path = $_[0];
my $import_path;
my $fh;
my @file_paths = ($path, $dir . "/" . $path, dirname($filename) . "/" . $path);
for my $possible ( @file_paths ) {
if (not $import_stack{$possible} and open($fh, '<', $possible)) {
$import_path = $possible;
$import_stack{$import_path} = 1;
last;
}
}
if (eof $fh) {
return;
}
my $line;
while ($line = <$fh>) {
if ($line =~ m/^\s*#\s*include\s+<linux\/types.h>/) {
$linux_types = 1;
last;
}
if (my $included = ($line =~ /^\s*#\s*include\s+[<"](\S+)[>"]/)[0]) {
check_include_typesh($included);
}
}
close $fh;
delete $import_stack{$import_path};
}
sub check_sizetypes
{
if ($filename =~ /types.h|int-l64.h|int-ll64.h/o) {
return;
}
if ($lineno == 1) {
$linux_types = 0;
} elsif ($linux_types >= 1) {
return;
}
if ($line =~ m/^\s*#\s*include\s+<linux\/types.h>/) {
$linux_types = 1;
return;
}
if (my $included = ($line =~ /^\s*#\s*include\s+[<"](\S+)[>"]/)[0]) {
check_include_typesh($included);
}
if ($line =~ m/__[us](8|16|32|64)\b/) {
printf STDERR "$filename:$lineno: " .
"found __[us]{8,16,32,64} type " .
"without #include <linux/types.h>\n";
$linux_types = 2;
# Warn until headers are all fixed
#$ret = 1;
}
}
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