[xen stable-4.17] x86/cpuid: Don't expose {IPRED,RRSBA,BHI}_CTRL to PV guests

[patchbot@xxxxxxx]

commit d2b179ba6e308769f1b37637d1c746c3dbf55cc0
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Tue Apr 9 15:03:05 2024 +0100
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Tue Apr 9 16:48:19 2024 +0100

    x86/cpuid: Don't expose {IPRED,RRSBA,BHI}_CTRL to PV guests
    
    All of these are prediction-mode (i.e. CPL) based.  They don't operate as
    advertised in PV context.
    
    Fixes: 4dd676070684 ("x86/spec-ctrl: Expose IPRED_CTRL to guests")
    Fixes: 478e4787fa64 ("x86/spec-ctrl: Expose RRSBA_CTRL to guests")
    Fixes: 583f1d095052 ("x86/spec-ctrl: Expose BHI_CTRL to guests")
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Acked-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    (cherry picked from commit 4b3da946ad7e3452761478ae683da842e7ff20d6)
---
 xen/include/public/arch-x86/cpufeatureset.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/xen/include/public/arch-x86/cpufeatureset.h 
b/xen/include/public/arch-x86/cpufeatureset.h
index 51f238683c..63c8ac8486 100644
--- a/xen/include/public/arch-x86/cpufeatureset.h
+++ b/xen/include/public/arch-x86/cpufeatureset.h
@@ -295,9 +295,9 @@ XEN_CPUFEATURE(INTEL_PPIN,         12*32+ 0) /*   Protected 
Processor Inventory
 
 /* Intel-defined CPU features, CPUID level 0x00000007:2.edx, word 13 */
 XEN_CPUFEATURE(INTEL_PSFD,         13*32+ 0) /*A  MSR_SPEC_CTRL.PSFD */
-XEN_CPUFEATURE(IPRED_CTRL,         13*32+ 1) /*A  MSR_SPEC_CTRL.IPRED_DIS_* */
-XEN_CPUFEATURE(RRSBA_CTRL,         13*32+ 2) /*A  MSR_SPEC_CTRL.RRSBA_DIS_* */
-XEN_CPUFEATURE(BHI_CTRL,           13*32+ 4) /*A  MSR_SPEC_CTRL.BHI_DIS_S */
+XEN_CPUFEATURE(IPRED_CTRL,         13*32+ 1) /*S  MSR_SPEC_CTRL.IPRED_DIS_* */
+XEN_CPUFEATURE(RRSBA_CTRL,         13*32+ 2) /*S  MSR_SPEC_CTRL.RRSBA_DIS_* */
+XEN_CPUFEATURE(BHI_CTRL,           13*32+ 4) /*S  MSR_SPEC_CTRL.BHI_DIS_S */
 XEN_CPUFEATURE(MCDT_NO,            13*32+ 5) /*A  MCDT_NO */
 
 /* Intel-defined CPU features, CPUID level 0x00000007:1.ecx, word 14 */
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.17