From: Andrew Cooper <andrew.cooper3@citrix.com>
Date: Thu, 10 Jun 2021 10:02:47 +0000 (+0100)
Subject: x86/platform: Permit reading the TSX control MSRs via XENPF_resource_op
X-Git-Tag: archive/raspbian/4.16.0+51-g0941d6cb-1+rpi1~2^2~42^2~429
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=3ccaa174faeb8fbd68f79c670e32c6689cfc7ffc;p=xen.git

x86/platform: Permit reading the TSX control MSRs via XENPF_resource_op

We are going to want this to write some tests with.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
---

diff --git a/xen/arch/x86/platform_hypercall.c b/xen/arch/x86/platform_hypercall.c
index 41d8e59563..284c2dfb9e 100644
--- a/xen/arch/x86/platform_hypercall.c
+++ b/xen/arch/x86/platform_hypercall.c
@@ -74,6 +74,12 @@ static bool msr_read_allowed(unsigned int msr)
 
     case MSR_IA32_TSC:
         return true;
+
+    case MSR_TSX_FORCE_ABORT:
+        return cpu_has_tsx_force_abort;
+
+    case MSR_TSX_CTRL:
+        return cpu_has_tsx_ctrl;
     }
 
     if ( ppin_msr && msr == ppin_msr )