From a2e5da2cf471b5ac849bcd7d9960466b9cd28a35 Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Mon, 21 Dec 2020 19:56:10 -0800
Subject: <sys/platform/x86.h>: Add Intel LAM support

Add Intel Linear Address Masking (LAM) support to <sys/platform/x86.h>.
HAS_CPU_FEATURE (LAM) can be used to detect if LAM is enabled in CPU.

LAM modifies the checking that is applied to 64-bit linear addresses,
allowing software to use of the untranslated address bits for metadata.
---
 manual/platform.texi | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'manual')

diff --git a/manual/platform.texi b/manual/platform.texi
index 8fec293..b67683a 100644
--- a/manual/platform.texi
+++ b/manual/platform.texi
@@ -378,6 +378,9 @@ the indirect branch predictor barrier (IBPB).
 @code{KL} -- AES Key Locker instructions.
 
 @item
+@code{LAM} -- Linear Address Masking.
+
+@item
 @code{L1D_FLUSH} -- IA32_FLUSH_CMD MSR.
 
 @item
-- 
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