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selftests/powerpc: Add read/write debugfs file, int

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Debugfs files are not always integers, so make *_file return/write a
byte buffer, and *_int deal with int values specifically. This increases
consistency with the other file read/write helpers.

Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Reviewed-by: Andrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20230203003947.38033-3-bgray@linux.ibm.com
This commit is contained in:
Benjamin Gray
2023-02-03 11:39:44 +11:00
committed by Michael Ellerman
parent a974f0c131
commit 121d340be9
5 changed files with 47 additions and 35 deletions
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12
tools/testing/selftests/powerpc/security/entry_flush.c
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@@ -34,18 +34,18 @@ int entry_flush_test(void)
// The PMU event we use only works on Power7 or later
SKIP_IF(!have_hwcap(PPC_FEATURE_ARCH_2_06));
if (read_debugfs_file("powerpc/rfi_flush", &rfi_flush_orig) < 0) {
if (read_debugfs_int("powerpc/rfi_flush", &rfi_flush_orig) < 0) {
perror("Unable to read powerpc/rfi_flush debugfs file");
SKIP_IF(1);
}
if (read_debugfs_file("powerpc/entry_flush", &entry_flush_orig) < 0) {
if (read_debugfs_int("powerpc/entry_flush", &entry_flush_orig) < 0) {
perror("Unable to read powerpc/entry_flush debugfs file");
SKIP_IF(1);
}
if (rfi_flush_orig != 0) {
if (write_debugfs_file("powerpc/rfi_flush", 0) < 0) {
if (write_debugfs_int("powerpc/rfi_flush", 0) < 0) {
perror("error writing to powerpc/rfi_flush debugfs file");
FAIL_IF(1);
}
@@ -105,7 +105,7 @@ again:
if (entry_flush == entry_flush_orig) {
entry_flush = !entry_flush_orig;
if (write_debugfs_file("powerpc/entry_flush", entry_flush) < 0) {
if (write_debugfs_int("powerpc/entry_flush", entry_flush) < 0) {
perror("error writing to powerpc/entry_flush debugfs file");
return 1;
}
@@ -120,12 +120,12 @@ again:
set_dscr(0);
if (write_debugfs_file("powerpc/rfi_flush", rfi_flush_orig) < 0) {
if (write_debugfs_int("powerpc/rfi_flush", rfi_flush_orig) < 0) {
perror("unable to restore original value of powerpc/rfi_flush debugfs file");
return 1;
}
if (write_debugfs_file("powerpc/entry_flush", entry_flush_orig) < 0) {
if (write_debugfs_int("powerpc/entry_flush", entry_flush_orig) < 0) {
perror("unable to restore original value of powerpc/entry_flush debugfs file");
return 1;
}