[xen master] libs/guest: introduce xc_cpu_policy_t

[patchbot@xxxxxxx]

commit 989ec5bd1d790ef53db2cf0f12244d10b07bfa3a
Author:     Roger Pau Monne <roger.pau@xxxxxxxxxx>
AuthorDate: Tue Mar 16 16:39:00 2021 +0100
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Thu Apr 29 19:27:21 2021 +0100

    libs/guest: introduce xc_cpu_policy_t
    
    Introduce an opaque type that is used to store the CPUID and MSRs
    policies of a domain. Such type uses the existing {cpuid,msr}_policy
    structures to store the data, but doesn't expose the type to the users
    of the xenguest library. There are also two arrays to allow for easier
    serialization without requiring an allocation each time.
    
    Introduce an allocation (init) and freeing function (destroy) to
    manage the type.
    
    Note the type is not yet used anywhere.
    
    Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
 tools/include/xenctrl.h         |  6 ++++++
 tools/libs/guest/xg_cpuid_x86.c | 18 ++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/tools/include/xenctrl.h b/tools/include/xenctrl.h
index e91ff92b9b..1aba814f01 100644
--- a/tools/include/xenctrl.h
+++ b/tools/include/xenctrl.h
@@ -2590,6 +2590,12 @@ int xc_psr_get_domain_data(xc_interface *xch, uint32_t 
domid,
 int xc_psr_get_hw_info(xc_interface *xch, uint32_t socket,
                        xc_psr_feat_type type, xc_psr_hw_info *hw_info);
 
+typedef struct xc_cpu_policy *xc_cpu_policy_t;
+
+/* Create and free a xc_cpu_policy object. */
+xc_cpu_policy_t xc_cpu_policy_init(void);
+void xc_cpu_policy_destroy(xc_cpu_policy_t policy);
+
 int xc_get_cpu_levelling_caps(xc_interface *xch, uint32_t *caps);
 int xc_get_cpu_featureset(xc_interface *xch, uint32_t index,
                           uint32_t *nr_features, uint32_t *featureset);
diff --git a/tools/libs/guest/xg_cpuid_x86.c b/tools/libs/guest/xg_cpuid_x86.c
index 4491a68bd7..39d62fe2f3 100644
--- a/tools/libs/guest/xg_cpuid_x86.c
+++ b/tools/libs/guest/xg_cpuid_x86.c
@@ -39,6 +39,13 @@ enum {
 #define bitmaskof(idx)      (1u << ((idx) & 31))
 #define featureword_of(idx) ((idx) >> 5)
 
+struct xc_cpu_policy {
+    struct cpuid_policy cpuid;
+    struct msr_policy msr;
+    xen_cpuid_leaf_t leaves[CPUID_MAX_SERIALISED_LEAVES];
+    xen_msr_entry_t entries[MSR_MAX_SERIALISED_ENTRIES];
+};
+
 int xc_get_cpu_levelling_caps(xc_interface *xch, uint32_t *caps)
 {
     DECLARE_SYSCTL;
@@ -665,3 +672,14 @@ out:
 
     return rc;
 }
+
+xc_cpu_policy_t xc_cpu_policy_init(void)
+{
+    return calloc(1, sizeof(struct xc_cpu_policy));
+}
+
+void xc_cpu_policy_destroy(xc_cpu_policy_t policy)
+{
+    if ( policy )
+        free(policy);
+}
--
generated by git-patchbot for /home/xen/git/xen.git#master