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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen stable-4.16] libxl: change the type of libxl_cpuid_policy_list
commit 22e8f7b45c37a305daa92e63104b7534c0a9684e
Author: Roger Pau Monne <roger.pau@xxxxxxxxxx>
AuthorDate: Tue Jul 25 15:05:54 2023 +0200
Commit: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Tue Aug 8 16:02:54 2023 +0100
libxl: change the type of libxl_cpuid_policy_list
Currently libxl_cpuid_policy_list is an opaque type to the users of
libxl, and internally it's an array of xc_xend_cpuid objects.
Change the type to instead be a structure that contains one array for
CPUID policies, in preparation for it also holding another array for
MSR policies.
Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
Reviewed-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
(cherry picked from commit 4825d19603580949144ac2ac5cb22df75c9da954)
---
tools/include/libxl.h | 8 +---
tools/libs/light/libxl_cpuid.c | 87 +++++++++++++++++++++++++--------------
tools/libs/light/libxl_internal.h | 4 ++
3 files changed, 63 insertions(+), 36 deletions(-)
diff --git a/tools/include/libxl.h b/tools/include/libxl.h
index 2bbbd21f0b..e5cf115a4a 100644
--- a/tools/include/libxl.h
+++ b/tools/include/libxl.h
@@ -1419,12 +1419,8 @@ typedef struct {
void libxl_bitmap_init(libxl_bitmap *map);
void libxl_bitmap_dispose(libxl_bitmap *map);
-/*
- * libxl_cpuid_policy is opaque in the libxl ABI. Users of both libxl and
- * libxc may not make assumptions about xc_xend_cpuid.
- */
-typedef struct xc_xend_cpuid libxl_cpuid_policy;
-typedef libxl_cpuid_policy * libxl_cpuid_policy_list;
+struct libxl__cpu_policy;
+typedef struct libxl__cpu_policy *libxl_cpuid_policy_list;
void libxl_cpuid_dispose(libxl_cpuid_policy_list *cpuid_list);
int libxl_cpuid_policy_list_length(const libxl_cpuid_policy_list *l);
void libxl_cpuid_policy_list_copy(libxl_ctx *ctx,
diff --git a/tools/libs/light/libxl_cpuid.c b/tools/libs/light/libxl_cpuid.c
index 0d876342e3..48802b9f7c 100644
--- a/tools/libs/light/libxl_cpuid.c
+++ b/tools/libs/light/libxl_cpuid.c
@@ -19,22 +19,29 @@ int libxl__cpuid_policy_is_empty(libxl_cpuid_policy_list
*pl)
return !libxl_cpuid_policy_list_length(pl);
}
-void libxl_cpuid_dispose(libxl_cpuid_policy_list *p_cpuid_list)
+void libxl_cpuid_dispose(libxl_cpuid_policy_list *pl)
{
- int i, j;
- libxl_cpuid_policy_list cpuid_list = *p_cpuid_list;
+ libxl_cpuid_policy_list policy = *pl;
- if (cpuid_list == NULL)
+ if (policy == NULL)
return;
- for (i = 0; cpuid_list[i].input[0] != XEN_CPUID_INPUT_UNUSED; i++) {
- for (j = 0; j < 4; j++)
- if (cpuid_list[i].policy[j] != NULL) {
- free(cpuid_list[i].policy[j]);
- cpuid_list[i].policy[j] = NULL;
+
+ if (policy->cpuid) {
+ unsigned int i, j;
+ struct xc_xend_cpuid *cpuid_list = policy->cpuid;
+
+ for (i = 0; cpuid_list[i].input[0] != XEN_CPUID_INPUT_UNUSED; i++) {
+ for (j = 0; j < 4; j++) {
+ if (cpuid_list[i].policy[j] != NULL) {
+ free(cpuid_list[i].policy[j]);
+ }
}
+ }
+ free(policy->cpuid);
}
- free(cpuid_list);
- *p_cpuid_list = NULL;
+
+ free(policy);
+ *pl = NULL;
return;
}
@@ -62,11 +69,17 @@ struct cpuid_flags {
/* go through the dynamic array finding the entry for a specified leaf.
* if no entry exists, allocate one and return that.
*/
-static libxl_cpuid_policy_list cpuid_find_match(libxl_cpuid_policy_list *list,
- uint32_t leaf, uint32_t subleaf)
+static struct xc_xend_cpuid *cpuid_find_match(libxl_cpuid_policy_list *pl,
+ uint32_t leaf, uint32_t subleaf)
{
+ libxl_cpuid_policy_list policy = *pl;
+ struct xc_xend_cpuid **list;
int i = 0;
+ if (policy == NULL)
+ policy = *pl = calloc(1, sizeof(*policy));
+
+ list = &policy->cpuid;
if (*list != NULL) {
for (i = 0; (*list)[i].input[0] != XEN_CPUID_INPUT_UNUSED; i++) {
if ((*list)[i].input[0] == leaf && (*list)[i].input[1] == subleaf)
@@ -86,7 +99,7 @@ static libxl_cpuid_policy_list
cpuid_find_match(libxl_cpuid_policy_list *list,
* Will overwrite earlier entries and thus can be called multiple
* times.
*/
-int libxl_cpuid_parse_config(libxl_cpuid_policy_list *cpuid, const char* str)
+int libxl_cpuid_parse_config(libxl_cpuid_policy_list *policy, const char* str)
{
#define NA XEN_CPUID_INPUT_UNUSED
static const struct cpuid_flags cpuid_flags[] = {
@@ -332,7 +345,7 @@ int libxl_cpuid_parse_config(libxl_cpuid_policy_list
*cpuid, const char* str)
if (flag->name == NULL) {
return 2;
}
- entry = cpuid_find_match(cpuid, flag->leaf, flag->subleaf);
+ entry = cpuid_find_match(policy, flag->leaf, flag->subleaf);
resstr = entry->policy[flag->reg - 1];
num = strtoull(val, &endptr, 0);
flags[flag->length] = 0;
@@ -387,7 +400,7 @@ int libxl_cpuid_parse_config(libxl_cpuid_policy_list
*cpuid, const char* str)
* the strings for each register were directly exposed to the user.
* Used for maintaining compatibility with older config files
*/
-int libxl_cpuid_parse_config_xend(libxl_cpuid_policy_list *cpuid,
+int libxl_cpuid_parse_config_xend(libxl_cpuid_policy_list *policy,
const char* str)
{
char *endptr;
@@ -414,7 +427,7 @@ int libxl_cpuid_parse_config_xend(libxl_cpuid_policy_list
*cpuid,
return 3;
}
str = endptr + 1;
- entry = cpuid_find_match(cpuid, leaf, subleaf);
+ entry = cpuid_find_match(policy, leaf, subleaf);
for (str = endptr + 1; *str != 0;) {
if (str[0] != 'e' || str[2] != 'x') {
return 4;
@@ -489,7 +502,8 @@ int libxl__cpuid_legacy(libxl_ctx *ctx, uint32_t domid,
bool restore,
info->tsc_mode == LIBXL_TSC_MODE_ALWAYS_EMULATE);
r = xc_cpuid_apply_policy(ctx->xch, domid, restore, NULL, 0,
- pae, itsc, nested_virt, info->cpuid, NULL);
+ pae, itsc, nested_virt,
+ info->cpuid ? info->cpuid->cpuid : NULL, NULL);
if (r)
LOGEVD(ERROR, -r, domid, "Failed to apply CPUID policy");
@@ -514,16 +528,18 @@ static const char *policy_names[4] = { "eax", "ebx",
"ecx", "edx" };
*/
yajl_gen_status libxl_cpuid_policy_list_gen_json(yajl_gen hand,
- libxl_cpuid_policy_list *pcpuid)
+ libxl_cpuid_policy_list *pl)
{
- libxl_cpuid_policy_list cpuid = *pcpuid;
+ libxl_cpuid_policy_list policy = *pl;
+ struct xc_xend_cpuid *cpuid;
yajl_gen_status s;
int i, j;
s = yajl_gen_array_open(hand);
if (s != yajl_gen_status_ok) goto out;
- if (cpuid == NULL) goto empty;
+ if (policy == NULL || policy->cpuid == NULL) goto empty;
+ cpuid = policy->cpuid;
for (i = 0; cpuid[i].input[0] != XEN_CPUID_INPUT_UNUSED; i++) {
s = yajl_gen_map_open(hand);
@@ -562,7 +578,7 @@ int libxl__cpuid_policy_list_parse_json(libxl__gc *gc,
libxl_cpuid_policy_list *p)
{
int i, size;
- libxl_cpuid_policy_list l;
+ struct xc_xend_cpuid *l;
flexarray_t *array;
if (!libxl__json_object_is_array(o))
@@ -573,8 +589,10 @@ int libxl__cpuid_policy_list_parse_json(libxl__gc *gc,
return 0;
size = array->count;
+ *p = libxl__calloc(NOGC, 1, sizeof(**p));
/* need one extra slot as sentinel */
- l = *p = libxl__calloc(NOGC, size + 1, sizeof(libxl_cpuid_policy));
+ l = (*p)->cpuid = libxl__calloc(NOGC, size + 1,
+ sizeof(struct xc_xend_cpuid));
l[size].input[0] = XEN_CPUID_INPUT_UNUSED;
l[size].input[1] = XEN_CPUID_INPUT_UNUSED;
@@ -617,8 +635,12 @@ int libxl__cpuid_policy_list_parse_json(libxl__gc *gc,
int libxl_cpuid_policy_list_length(const libxl_cpuid_policy_list *pl)
{
int i = 0;
- libxl_cpuid_policy_list l = *pl;
+ const struct xc_xend_cpuid *l;
+
+ if (*pl == NULL)
+ return 0;
+ l = (*pl)->cpuid;
if (l) {
while (l[i].input[0] != XEN_CPUID_INPUT_UNUSED)
i++;
@@ -628,20 +650,25 @@ int libxl_cpuid_policy_list_length(const
libxl_cpuid_policy_list *pl)
}
void libxl_cpuid_policy_list_copy(libxl_ctx *ctx,
- libxl_cpuid_policy_list *dst,
- const libxl_cpuid_policy_list *src)
+ libxl_cpuid_policy_list *pdst,
+ const libxl_cpuid_policy_list *psrc)
{
+ struct xc_xend_cpuid **dst;
+ struct xc_xend_cpuid *const *src;
GC_INIT(ctx);
int i, j, len;
- if (*src == NULL) {
- *dst = NULL;
+ if (*psrc == NULL) {
+ *pdst = NULL;
goto out;
}
- len = libxl_cpuid_policy_list_length(src);
+ *pdst = libxl__calloc(NOGC, 1, sizeof(**pdst));
+ dst = &(*pdst)->cpuid;
+ src = &(*psrc)->cpuid;
+ len = libxl_cpuid_policy_list_length(psrc);
/* one extra slot for sentinel */
- *dst = libxl__calloc(NOGC, len + 1, sizeof(libxl_cpuid_policy));
+ *dst = libxl__calloc(NOGC, len + 1, sizeof(struct xc_xend_cpuid));
(*dst)[len].input[0] = XEN_CPUID_INPUT_UNUSED;
(*dst)[len].input[1] = XEN_CPUID_INPUT_UNUSED;
diff --git a/tools/libs/light/libxl_internal.h
b/tools/libs/light/libxl_internal.h
index ee6a251700..8c67a0eeb3 100644
--- a/tools/libs/light/libxl_internal.h
+++ b/tools/libs/light/libxl_internal.h
@@ -4859,6 +4859,10 @@ int libxl__is_domid_recent(libxl__gc *gc, uint32_t
domid, bool *recent);
/* os-specific implementation of setresuid() */
int libxl__setresuid(uid_t ruid, uid_t euid, uid_t suid);
+struct libxl__cpu_policy {
+ struct xc_xend_cpuid *cpuid;
+};
+
#endif
/*
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.16
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