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| author |   Yazen Ghannam <yazen.ghannam@amd.com> | 2024-06-06 11:12:57 -0500 |
|---|---|---|
| committer |   Borislav Petkov (AMD) <bp@alien8.de> | 2024-06-12 11:38:58 +0200 |
| commit | dc5243921be1b6a0b4259dbcec3dc95016ad8427 (patch) | |
| tree | 7720b7401dece7f39bd57f5e3f76229bb5c0f838 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | hwmon: (k10temp) Check return value of amd_smn_read() (diff) | |
| download | wireguard-linux-dc5243921be1b6a0b4259dbcec3dc95016ad8427.tar.xz wireguard-linux-dc5243921be1b6a0b4259dbcec3dc95016ad8427.zip | |
x86/amd_nb: Enhance SMN access error checking
AMD Zen-based systems use a System Management Network (SMN) that
provides access to implementation-specific registers.
SMN accesses are done indirectly through an index/data pair in PCI
config space. The accesses can fail for a variety of reasons.
Include code comments to describe some possible scenarios.
Require error checking for callers of amd_smn_read() and amd_smn_write().
This is needed because many error conditions cannot be checked by these
functions.
[ bp: Touchup comment. ]
Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://lore.kernel.org/r/20240606-fix-smn-bad-read-v4-4-ffde21931c3f@amd.com
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
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