All of lore.kernel.org
 help / color / mirror / Atom feed
From: Robert Hoo <robert.hu@linux.intel.com>
To: pbonzini@redhat.com, chao.gao@intel.com, binbin.wu@linux.intel.com
Cc: seanjc@google.com, qemu-devel@nongnu.org,
	yang.zhong@linux.intel.com,
	Robert Hoo <robert.hu@linux.intel.com>
Subject: [PATCH] i386: QEMU support LAM (Linear Address Masking)
Date: Mon, 27 Feb 2023 21:52:03 +0800	[thread overview]
Message-ID: <20230227135203.418404-1-robert.hu@linux.intel.com> (raw)

Define feature word "lam", so that QEMU can support this new feature.

LAM is enumerated by CPUID(7,1).EAX[26], it allows to use upper bits of
linear address for meta data storage. Analogous to ARM MTE, but more
flexible.

More info can be found ISE Chap10
https://cdrdv2.intel.com/v1/dl/getContent/671368

Signed-off-by: Robert Hoo <robert.hu@linux.intel.com>
---
 target/i386/cpu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 4d2b8d0444..d6d573ca38 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -876,7 +876,7 @@ FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
             NULL, NULL, NULL, NULL,
             NULL, NULL, NULL, NULL,
             NULL, NULL, NULL, NULL,
-            NULL, NULL, NULL, NULL,
+            NULL, NULL, "lam", NULL,
             NULL, NULL, NULL, NULL,
         },
         .cpuid = {
-- 
2.31.1



                 reply	other threads:[~2023-02-27 13:57 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20230227135203.418404-1-robert.hu@linux.intel.com \
    --to=robert.hu@linux.intel.com \
    --cc=binbin.wu@linux.intel.com \
    --cc=chao.gao@intel.com \
    --cc=pbonzini@redhat.com \
    --cc=qemu-devel@nongnu.org \
    --cc=seanjc@google.com \
    --cc=yang.zhong@linux.intel.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.