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From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Xen-devel <xen-devel@lists.xenproject.org>
Cc: "Andrew Cooper" <andrew.cooper3@citrix.com>,
	"Jan Beulich" <JBeulich@suse.com>,
	"Roger Pau Monné" <roger.pau@citrix.com>, "Wei Liu" <wl@xen.org>,
	"Alejandro Vallejo" <alejandro.vallejo@cloud.com>
Subject: [PATCH] xen/cpu-policy: Add an IBRS -> AUTO_IBRS dependency
Date: Wed, 31 May 2023 16:30:28 +0100	[thread overview]
Message-ID: <20230531153028.1224147-1-andrew.cooper3@citrix.com> (raw)

AUTO_IBRS is an extention over regular (AMD) IBRS, and needs hiding if IBRS is
levelled out for any reason.

Fixes: defaf651631a ("x86/hvm: Expose Automatic IBRS to guests")
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
---
CC: Jan Beulich <JBeulich@suse.com>
CC: Roger Pau Monné <roger.pau@citrix.com>
CC: Wei Liu <wl@xen.org>
CC: Alejandro Vallejo <alejandro.vallejo@cloud.com>

This was an oversight of mine when reviewing the aformentioned patch.
---
 xen/tools/gen-cpuid.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/tools/gen-cpuid.py b/xen/tools/gen-cpuid.py
index f28ff708a2fc..973fcc1c64e8 100755
--- a/xen/tools/gen-cpuid.py
+++ b/xen/tools/gen-cpuid.py
@@ -319,7 +319,7 @@ def crunch_numbers(state):
         # as dependent features simplifies Xen's logic, and prevents the guest
         # from seeing implausible configurations.
         IBRSB: [STIBP, SSBD, INTEL_PSFD],
-        IBRS: [AMD_STIBP, AMD_SSBD, PSFD,
+        IBRS: [AMD_STIBP, AMD_SSBD, PSFD, AUTO_IBRS,
                IBRS_ALWAYS, IBRS_FAST, IBRS_SAME_MODE],
         AMD_STIBP: [STIBP_ALWAYS],
 

base-commit: 465217b0f872602b4084a1b0fa2ef75377cb3589
-- 
2.30.2



             reply	other threads:[~2023-05-31 15:31 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-31 15:30 Andrew Cooper [this message]
2023-05-31 16:01 ` [PATCH] xen/cpu-policy: Add an IBRS -> AUTO_IBRS dependency Alejandro Vallejo
2023-06-01  8:30 ` Jan Beulich

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