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From: Boris Ostrovsky <>
Cc: X86 ML <>,
	"" <>,
	Ingo Molnar <>, "H. Peter Anvin" <>,
	Thomas Gleixner <>
Subject: SME/32-bit regression
Date: Tue, 5 Sep 2017 23:45:07 -0400
Message-ID: <> (raw)

It appears there is a regression for 32-bit kernels due to SME changes.

I bisected my particular problem (Xen PV guest) to 
21729f81ce8ae76a6995681d40e16f7ce8075db4 but I also saw pmd_clear_bad() 
errors on baremetal. This seems to be caused by sme_me_mask being an 
unsigned long as opposed to phys_addr_t (the actual problem is that 
__PHYSICAL_MASK is truncated). When I declare it as u64 and drop 
unsigned long cast in __sme_set()/__sme_clr() the problem goes way. 
(This presumably won't work for non-PAE which I haven't tried).


             reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-09-06  3:45 Boris Ostrovsky [this message]
2017-09-06  9:26 ` Borislav Petkov
2017-09-06  9:45   ` Borislav Petkov
     [not found]     ` <>
2017-09-06 16:44       ` Borislav Petkov
2017-09-06 18:06         ` Brijesh Singh
2017-09-06 18:19           ` Borislav Petkov
2017-09-06 21:03             ` Boris Ostrovsky
2017-09-07  0:26               ` Brijesh Singh
2017-09-07  9:38                 ` [PATCH] x86/mm: Make the SME mask a u64 Borislav Petkov
2017-09-07 10:34                   ` [tip:x86/urgent] " tip-bot for Borislav Petkov
2017-09-06 13:54   ` SME/32-bit regression Boris Ostrovsky
2017-09-06 13:57     ` Thomas Gleixner
2017-09-06 14:03       ` Boris Ostrovsky

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