[Xen-changelog] [xen staging] x86/CPUID: drop INVPCID dependency on PCID

[patchbot@xxxxxxx]

commit 36c357817d7c595dd8fa163c908a8c44d9f4ed6e
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Wed Sep 18 15:20:00 2019 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Sep 18 15:20:00 2019 +0200

    x86/CPUID: drop INVPCID dependency on PCID
    
    PCID validly depends on LM, as it can be enabled in Long Mode only.
    INVPCID, otoh, can be used not only without PCID enabled, but also
    outside of Long Mode altogether. In both cases its functionality is
    simply restricted to PCID 0, which is sort of expected as no other PCID
    can be activated there.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 xen/tools/gen-cpuid.py | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/xen/tools/gen-cpuid.py b/xen/tools/gen-cpuid.py
index f76e80d690..434a6ebf04 100755
--- a/xen/tools/gen-cpuid.py
+++ b/xen/tools/gen-cpuid.py
@@ -218,10 +218,6 @@ def crunch_numbers(state):
         #
         # SSE4_2: [POPCNT]
 
-        # The INVPCID instruction depends on PCID infrastructure being
-        # available.
-        PCID: [INVPCID],
-
         # XSAVE is an extra set of instructions for state management, but
         # doesn't constitue new state itself.  Some of the dependent features
         # are instructions built on top of base XSAVE, while others are new
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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