The posted version of this patch depends on c/s 3c555295 "x86/vpmu: Improve
documentation and parsing for vpmu=" (Xen 4.12 and later) to prevent
`vpmu=rtm-abort` impliying `vpmu=1`, which is outside of security support.
Signed-off-by: Andrew Cooper <andrew.coop...@citrix.com>
---
CC: Jan Beulich <jbeul...@suse.com>
xen/arch/x86/cpu/vpmu.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/xen/arch/x86/cpu/vpmu.c b/xen/arch/x86/cpu/vpmu.c
index 639ae0c..9a42e09 100644
--- a/xen/arch/x86/cpu/vpmu.c
+++ b/xen/arch/x86/cpu/vpmu.c
@@ -91,6 +91,10 @@ static int __init parse_vpmu_params(const char *s)
s = ss + 1;
} while ( *ss );
+
+ if ( !vpmu_features ) /* rtm-abort doesn't imply vpmu=1 */
+ break;
+
/* fall through */
case 1:
/* Default VPMU mode */
--
2.1.4
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