@@ -2616,6 +2616,8 @@ int xc_cpu_policy_get_msr(xc_interface *xch, const xc_cpu_policy_t policy,
int xc_cpu_policy_update_cpuid(xc_interface *xch, xc_cpu_policy_t policy,
const xen_cpuid_leaf_t *leaves,
uint32_t nr);
+int xc_cpu_policy_update_msrs(xc_interface *xch, xc_cpu_policy_t policy,
+ const xen_msr_entry_t *msrs, uint32_t nr);
int xc_get_cpu_levelling_caps(xc_interface *xch, uint32_t *caps);
int xc_get_cpu_featureset(xc_interface *xch, uint32_t index,
@@ -912,3 +912,21 @@ int xc_cpu_policy_update_cpuid(xc_interface *xch, xc_cpu_policy_t policy,
return rc;
}
+
+int xc_cpu_policy_update_msrs(xc_interface *xch, xc_cpu_policy_t policy,
+ const xen_msr_entry_t *msrs, uint32_t nr)
+{
+ unsigned int err_msr = -1;
+ int rc = x86_msr_copy_from_buffer(&policy->msr, msrs, nr, &err_msr);
+
+ if ( rc )
+ {
+ if ( err_msr != -1 )
+ ERROR("Failed to deserialise MSRS (err index %#x) (%d = %s)",
+ err_msr, -rc, strerror(-rc));
+ errno = -rc;
+ rc = -1;
+ }
+
+ return rc;
+}
Introduce a helper to update the MSR policy using an array of xen_msr_entry_t entries. Note the MSRs present in the input xen_msr_entry_t array will replace any existing entries on the policy. No user of the interface introduced on this patch. Signed-off-by: Roger Pau Monné <roger.pau@citrix.com> --- Changes since v1: - Drop logic to update entries manually. - Only print failure message if err_msr != -1. --- tools/include/xenctrl.h | 2 ++ tools/libs/guest/xg_cpuid_x86.c | 18 ++++++++++++++++++ 2 files changed, 20 insertions(+)