From 21e3ef57e0406b6b9a783f721f29df8f91a00f99 Mon Sep 17 00:00:00 2001
From: Andrew Cooper <andrew.cooper3@citrix.com>
Date: Tue, 28 Mar 2023 20:48:29 +0100
Subject: x86: Rename {domctl,sysctl}.cpu_policy.{cpuid,msr}_policy fields

These weren't great names to begin with, and using {leaves,msrs} matches up
better with the existing nr_{leaves,msr} parameters anyway.

Furthermore, by renaming these fields we can get away with using some #define
trickery to avoid the struct {cpuid,msr}_policy merge needing to happen in a
single changeset.

No functional change.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
(cherry picked from commit 21e3ef57e0406b6b9a783f721f29df8f91a00f99)

xen: Correct comments after renaming xen_{dom,sys}ctl_cpu_policy fields

Fixes: 21e3ef57e040 ("x86: Rename {domctl,sysctl}.cpu_policy.{cpuid,msr}_policy fields")
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
(cherry picked from commit 6e06d229d538ea51b92dc189546c522f5e903511)

--- a/tools/libxc/xc_cpuid_x86.c
+++ b/tools/libxc/xc_cpuid_x86.c
@@ -171,9 +171,9 @@ int xc_get_system_cpu_policy(xc_interfac
     sysctl.cmd = XEN_SYSCTL_get_cpu_policy;
     sysctl.u.cpu_policy.index = index;
     sysctl.u.cpu_policy.nr_leaves = *nr_leaves;
-    set_xen_guest_handle(sysctl.u.cpu_policy.cpuid_policy, leaves);
+    set_xen_guest_handle(sysctl.u.cpu_policy.leaves, leaves);
     sysctl.u.cpu_policy.nr_msrs = *nr_msrs;
-    set_xen_guest_handle(sysctl.u.cpu_policy.msr_policy, msrs);
+    set_xen_guest_handle(sysctl.u.cpu_policy.msrs, msrs);
 
     ret = do_sysctl(xch, &sysctl);
 
@@ -209,9 +209,9 @@ int xc_get_domain_cpu_policy(xc_interfac
     domctl.cmd = XEN_DOMCTL_get_cpu_policy;
     domctl.domain = domid;
     domctl.u.cpu_policy.nr_leaves = *nr_leaves;
-    set_xen_guest_handle(domctl.u.cpu_policy.cpuid_policy, leaves);
+    set_xen_guest_handle(domctl.u.cpu_policy.leaves, leaves);
     domctl.u.cpu_policy.nr_msrs = *nr_msrs;
-    set_xen_guest_handle(domctl.u.cpu_policy.msr_policy, msrs);
+    set_xen_guest_handle(domctl.u.cpu_policy.msrs, msrs);
 
     ret = do_domctl(xch, &domctl);
 
--- a/xen/arch/x86/domctl.c
+++ b/xen/arch/x86/domctl.c
@@ -1531,20 +1531,20 @@ long arch_do_domctl(
 
     case XEN_DOMCTL_get_cpu_policy:
         /* Process the CPUID leaves. */
-        if ( guest_handle_is_null(domctl->u.cpu_policy.cpuid_policy) )
+        if ( guest_handle_is_null(domctl->u.cpu_policy.leaves) )
             domctl->u.cpu_policy.nr_leaves = CPUID_MAX_SERIALISED_LEAVES;
         else if ( (ret = x86_cpuid_copy_to_buffer(
                        d->arch.cpuid,
-                       domctl->u.cpu_policy.cpuid_policy,
+                       domctl->u.cpu_policy.leaves,
                        &domctl->u.cpu_policy.nr_leaves)) )
             break;
 
         /* Process the MSR entries. */
-        if ( guest_handle_is_null(domctl->u.cpu_policy.msr_policy) )
+        if ( guest_handle_is_null(domctl->u.cpu_policy.msrs) )
             domctl->u.cpu_policy.nr_msrs = MSR_MAX_SERIALISED_ENTRIES;
         else if ( (ret = x86_msr_copy_to_buffer(
                        d->arch.msr,
-                       domctl->u.cpu_policy.msr_policy,
+                       domctl->u.cpu_policy.msrs,
                        &domctl->u.cpu_policy.nr_msrs)) )
             break;
 
--- a/xen/arch/x86/sysctl.c
+++ b/xen/arch/x86/sysctl.c
@@ -357,11 +357,11 @@ long arch_do_sysctl(
                                ARRAY_SIZE(system_policies))];
 
         /* Process the CPUID leaves. */
-        if ( guest_handle_is_null(sysctl->u.cpu_policy.cpuid_policy) )
+        if ( guest_handle_is_null(sysctl->u.cpu_policy.leaves) )
             sysctl->u.cpu_policy.nr_leaves = CPUID_MAX_SERIALISED_LEAVES;
         else if ( (ret = x86_cpuid_copy_to_buffer(
                        policy->cpuid,
-                       sysctl->u.cpu_policy.cpuid_policy,
+                       sysctl->u.cpu_policy.leaves,
                        &sysctl->u.cpu_policy.nr_leaves)) )
             break;
 
@@ -373,11 +373,11 @@ long arch_do_sysctl(
         }
 
         /* Process the MSR entries. */
-        if ( guest_handle_is_null(sysctl->u.cpu_policy.msr_policy) )
+        if ( guest_handle_is_null(sysctl->u.cpu_policy.msrs) )
             sysctl->u.cpu_policy.nr_msrs = MSR_MAX_SERIALISED_ENTRIES;
         else if ( (ret = x86_msr_copy_to_buffer(
                        policy->msr,
-                       sysctl->u.cpu_policy.msr_policy,
+                       sysctl->u.cpu_policy.msrs,
                        &sysctl->u.cpu_policy.nr_msrs)) )
             break;
 
--- a/xen/include/public/domctl.h
+++ b/xen/include/public/domctl.h
@@ -665,12 +665,10 @@ struct xen_domctl_cpuid {
  * Query the CPUID and MSR policies for a specific domain.
  */
 struct xen_domctl_cpu_policy {
-    uint32_t nr_leaves; /* IN/OUT: Number of leaves in/written to
-                         * 'cpuid_policy'. */
-    uint32_t nr_msrs;   /* IN/OUT: Number of MSRs in/written to
-                         * 'msr_domain_policy' */
-    XEN_GUEST_HANDLE_64(xen_cpuid_leaf_t) cpuid_policy; /* OUT */
-    XEN_GUEST_HANDLE_64(xen_msr_entry_t) msr_policy;    /* OUT */
+    uint32_t nr_leaves; /* IN/OUT: Number of leaves in/written to 'leaves' */
+    uint32_t nr_msrs;   /* IN/OUT: Number of MSRs in/written to 'msrs' */
+    XEN_GUEST_HANDLE_64(xen_cpuid_leaf_t) leaves; /* OUT */
+    XEN_GUEST_HANDLE_64(xen_msr_entry_t)  msrs;   /* OUT */
 };
 typedef struct xen_domctl_cpu_policy xen_domctl_cpu_policy_t;
 DEFINE_XEN_GUEST_HANDLE(xen_domctl_cpu_policy_t);
--- a/xen/include/public/sysctl.h
+++ b/xen/include/public/sysctl.h
@@ -1088,15 +1088,13 @@ struct xen_sysctl_cpu_policy {
 #define XEN_SYSCTL_cpu_policy_pv_default   4
 #define XEN_SYSCTL_cpu_policy_hvm_default  5
     uint32_t index;       /* IN: Which policy to query? */
-    uint32_t nr_leaves;   /* IN/OUT: Number of leaves in/written to
-                           * 'cpuid_policy', or the maximum number of leaves
-                           * if the guest handle is NULL. */
-    uint32_t nr_msrs;     /* IN/OUT: Number of MSRs in/written to
-                           * 'msr_policy', or the maximum number of MSRs if
-                           * the guest handle is NULL. */
+    uint32_t nr_leaves;   /* IN/OUT: Number of leaves in/written to 'leaves',
+                           * or the max number if 'leaves' is NULL. */
+    uint32_t nr_msrs;     /* IN/OUT: Number of MSRs in/written to 'msrs', or
+                           * the max number of if 'msrs' is NULL. */
     uint32_t _rsvd;       /* Must be zero. */
-    XEN_GUEST_HANDLE_64(xen_cpuid_leaf_t) cpuid_policy; /* OUT */
-    XEN_GUEST_HANDLE_64(xen_msr_entry_t) msr_policy;    /* OUT */
+    XEN_GUEST_HANDLE_64(xen_cpuid_leaf_t) leaves; /* OUT */
+    XEN_GUEST_HANDLE_64(xen_msr_entry_t)  msrs;   /* OUT */
 };
 typedef struct xen_sysctl_cpu_policy xen_sysctl_cpu_policy_t;
 DEFINE_XEN_GUEST_HANDLE(xen_sysctl_cpu_policy_t);
