[xen staging] x86/platform: Permit reading the TSX control MSRs via XENPF_resource_op

[patchbot@xxxxxxx]

commit 3ccaa174faeb8fbd68f79c670e32c6689cfc7ffc
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Thu Jun 10 11:02:47 2021 +0100
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Tue Jun 15 20:50:32 2021 +0100

    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@xxxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/x86/platform_hypercall.c | 6 ++++++
 1 file changed, 6 insertions(+)

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 )
--
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