There are command line controls for this and the default also isn't "always
enable when hardware supports it", which logging should take into account.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- unstable.orig/xen/arch/x86/spec_ctrl.c 2022-04-13 14:29:38.000000000 +0200
+++ unstable/xen/arch/x86/spec_ctrl.c 2022-07-13 09:38:44.012913760 +0200
@@ -511,13 +511,12 @@ static void __init print_details(enum in
printk(" Support for HVM VMs:%s%s%s%s%s%s\n",
(boot_cpu_has(X86_FEATURE_SC_MSR_HVM) ||
boot_cpu_has(X86_FEATURE_SC_RSB_HVM) ||
- boot_cpu_has(X86_FEATURE_MD_CLEAR) ||
boot_cpu_has(X86_FEATURE_IBPB_ENTRY_HVM) ||
- opt_eager_fpu) ? "" : " None",
+ opt_eager_fpu || opt_md_clear_hvm) ? "" : " None",
boot_cpu_has(X86_FEATURE_SC_MSR_HVM) ? " MSR_SPEC_CTRL" : "",
boot_cpu_has(X86_FEATURE_SC_RSB_HVM) ? " RSB" : "",
opt_eager_fpu ? " EAGER_FPU" : "",
- boot_cpu_has(X86_FEATURE_MD_CLEAR) ? " MD_CLEAR" : "",
+ opt_md_clear_hvm ? " MD_CLEAR" : "",
boot_cpu_has(X86_FEATURE_IBPB_ENTRY_HVM) ? " IBPB-entry" : "");
#endif
@@ -525,13 +524,12 @@ static void __init print_details(enum in
printk(" Support for PV VMs:%s%s%s%s%s%s\n",
(boot_cpu_has(X86_FEATURE_SC_MSR_PV) ||
boot_cpu_has(X86_FEATURE_SC_RSB_PV) ||
- boot_cpu_has(X86_FEATURE_MD_CLEAR) ||
boot_cpu_has(X86_FEATURE_IBPB_ENTRY_PV) ||
- opt_eager_fpu) ? "" : " None",
+ opt_eager_fpu || opt_md_clear_pv) ? "" : " None",
boot_cpu_has(X86_FEATURE_SC_MSR_PV) ? " MSR_SPEC_CTRL" : "",
boot_cpu_has(X86_FEATURE_SC_RSB_PV) ? " RSB" : "",
opt_eager_fpu ? " EAGER_FPU" : "",
- boot_cpu_has(X86_FEATURE_MD_CLEAR) ? " MD_CLEAR" : "",
+ opt_md_clear_pv ? " MD_CLEAR" : "",
boot_cpu_has(X86_FEATURE_IBPB_ENTRY_PV) ? " IBPB-entry" : "");
printk(" XPTI (64-bit PV only): Dom0 %s, DomU %s (with%s PCID)\n",
On 13/07/2022 08:52, Jan Beulich wrote: > There are command line controls for this and the default also isn't "always > enable when hardware supports it", which logging should take into account. > > Signed-off-by: Jan Beulich <jbeulich@suse.com> Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
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