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author | Takashi Iwai <tiwai@suse.de> | 2022-12-22 11:11:48 +0300 |
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committer | Takashi Iwai <tiwai@suse.de> | 2022-12-22 11:11:48 +0300 |
commit | 2d78eb0342dd2c9c5cde9ae9ada1d33f189a858b (patch) | |
tree | f711bc9cab45f4963e4883ef15ff4c54a6cbc12e /arch/x86/events/intel/pt.c | |
parent | b47068b4aa53a57552398e3f60d0ed1918700c2b (diff) | |
parent | ee0b089d660021792e4ab4dda191b097ce1e964f (diff) | |
download | linux-2d78eb0342dd2c9c5cde9ae9ada1d33f189a858b.tar.xz |
Merge branch 'for-next' into for-linus
Diffstat (limited to 'arch/x86/events/intel/pt.c')
-rw-r--r-- | arch/x86/events/intel/pt.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/events/intel/pt.c b/arch/x86/events/intel/pt.c index 82ef87e9a897..42a55794004a 100644 --- a/arch/x86/events/intel/pt.c +++ b/arch/x86/events/intel/pt.c @@ -1263,6 +1263,15 @@ static int pt_buffer_try_single(struct pt_buffer *buf, int nr_pages) if (1 << order != nr_pages) goto out; + /* + * Some processors cannot always support single range for more than + * 4KB - refer errata TGL052, ADL037 and RPL017. Future processors might + * also be affected, so for now rather than trying to keep track of + * which ones, just disable it for all. + */ + if (nr_pages > 1) + goto out; + buf->single = true; buf->nr_pages = nr_pages; ret = 0; |