Commit-ID: 547edaca247abf910e32f0cd883ba83b8fc6d0ed Gitweb: https://git.kernel.org/tip/547edaca247abf910e32f0cd883ba83b8fc6d0ed Author: Kirill A. Shutemov <kirill.shute...@linux.intel.com> AuthorDate: Thu, 15 Mar 2018 16:49:06 +0300 Committer: Thomas Gleixner <t...@linutronix.de> CommitDate: Tue, 27 Mar 2018 11:49:58 +0200
x86/mm: Update comment in detect_tme() regarding x86_phys_bits As Kai pointed out, the primary reason for adjusting x86_phys_bits is to reflect that the the address space is reduced and not the ability to communicate the available physical address space to virtual machines. Suggested-by: Kai Huang <kai.hu...@linux.intel.com> Signed-off-by: Kirill A. Shutemov <kirill.shute...@linux.intel.com> Signed-off-by: Thomas Gleixner <t...@linutronix.de> Cc: Tom Lendacky <thomas.lenda...@amd.com> Cc: Dave Hansen <dave.han...@intel.com> Cc: linux...@kvack.org Link: https://lkml.kernel.org/r/20180315134907.9311-2-kirill.shute...@linux.intel.com --- arch/x86/kernel/cpu/intel.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index 3f8d7a3b6447..6106d11ceb6b 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -587,11 +587,8 @@ detect_keyid_bits: } /* - * Exclude KeyID bits from physical address bits. - * - * We have to do this even if we are not going to use KeyID bits - * ourself. VM guests still have to know that these bits are not usable - * for physical address. + * KeyID bits effectively lower the number of physical address + * bits. Update cpuinfo_x86::x86_phys_bits accordingly. */ c->x86_phys_bits -= keyid_bits; }
