From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: thomas.lendacky@amd.com
Cc: X86 ML <x86@kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: SME/32-bit regression
Date: Tue, 5 Sep 2017 23:45:07 -0400 [thread overview]
Message-ID: <4c07148a-5d97-0fc2-aa9b-1db31429736d@oracle.com> (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).
-boris
next reply other threads:[~2017-09-06 3:45 UTC|newest]
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] ` <CY4PR12MB11415936E980489690575E65EC970@CY4PR12MB1141.namprd12.prod.outlook.com>
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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