i386: QEMU support LAM (Linear Address Masking)

[PATCH] i386: QEMU support LAM (Linear Address Masking)

Robert Hoo posted 1 patch 1 year, 1 month ago

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target/i386/cpu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

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[PATCH] i386: QEMU support LAM (Linear Address Masking)

Posted by Robert Hoo 1 year, 1 month ago

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