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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen staging] tools/libx[cl]: Introduce struct xc_xend_cpuid for xc_cpuid_set()
commit 700738bf6a7a89a1b41cc783ae58f7c8ec1e9cfa
Author: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Fri Jun 12 14:05:44 2020 +0100
Commit: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Wed Jun 17 13:54:12 2020 +0100
tools/libx[cl]: Introduce struct xc_xend_cpuid for xc_cpuid_set()
In order to combine the functionality of xc_cpuid_set() with
xc_cpuid_apply_policy(), arrange to pass the data in a single contained
struct, rather than two arrays.
libxl__cpuid_policy is the ideal structure to use, but that would introduce
a
reverse dependency between libxc and libxl. Introduce xc_xend_cpuid (with a
transparent union to provide more useful names for the inputs), and use this
structure in libxl.
The public API has libxl_cpuid_policy as an opaque type referencing
libxl__cpuid_policy. Drop the inappropriate comment about its internals,
and
use xc_xend_cpuid as a differently named opaque backing object. Users of
both
libxl and libxc are not permitted to look at the internals.
No change in behaviour.
Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Acked-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
Release-acked-by: Paul Durrant <paul@xxxxxxx>
---
tools/libxc/include/xenctrl.h | 30 ++++++++++++++++++++++++++++--
tools/libxc/xc_cpuid_x86.c | 39 +++++++++++----------------------------
tools/libxl/libxl.h | 8 ++++----
tools/libxl/libxl_cpuid.c | 7 +++----
tools/libxl/libxl_internal.h | 10 ----------
5 files changed, 46 insertions(+), 48 deletions(-)
diff --git a/tools/libxc/include/xenctrl.h b/tools/libxc/include/xenctrl.h
index 7f15a61f29..6e622fc8e4 100644
--- a/tools/libxc/include/xenctrl.h
+++ b/tools/libxc/include/xenctrl.h
@@ -1792,10 +1792,36 @@ int xc_domain_debug_control(xc_interface *xch,
uint32_t vcpu);
#if defined(__i386__) || defined(__x86_64__)
+
+/*
+ * CPUID policy data, expressed in the legacy XEND format.
+ *
+ * Policy is an array of strings, 32 chars long:
+ * policy[0] = eax
+ * policy[1] = ebx
+ * policy[2] = ecx
+ * policy[3] = edx
+ *
+ * The format of the string is the following:
+ * '1' -> force to 1
+ * '0' -> force to 0
+ * 'x' -> we don't care (use default)
+ * 'k' -> pass through host value
+ * 's' -> legacy alias for 'k'
+ */
+struct xc_xend_cpuid {
+ union {
+ struct {
+ uint32_t leaf, subleaf;
+ };
+ uint32_t input[2];
+ };
+ char *policy[4];
+};
+
int xc_cpuid_set(xc_interface *xch,
uint32_t domid,
- const unsigned int *input,
- const char **config);
+ const struct xc_xend_cpuid *xend);
/*
* Make adjustments to the CPUID settings for a domain.
diff --git a/tools/libxc/xc_cpuid_x86.c b/tools/libxc/xc_cpuid_x86.c
index b42edd6457..edc2ad9b47 100644
--- a/tools/libxc/xc_cpuid_x86.c
+++ b/tools/libxc/xc_cpuid_x86.c
@@ -259,27 +259,8 @@ int xc_set_domain_cpu_policy(xc_interface *xch, uint32_t
domid,
return ret;
}
-/*
- * Configure a single input with the informatiom from config.
- *
- * Config is an array of strings:
- * config[0] = eax
- * config[1] = ebx
- * config[2] = ecx
- * config[3] = edx
- *
- * The format of the string is the following:
- * '1' -> force to 1
- * '0' -> force to 0
- * 'x' -> we don't care (use default)
- * 'k' -> pass through host value
- * 's' -> legacy alias for 'k'
- *
- * In all cases, the returned string consists of just '0' and '1'.
- */
int xc_cpuid_set(
- xc_interface *xch, uint32_t domid, const unsigned int *input,
- const char **config)
+ xc_interface *xch, uint32_t domid, const struct xc_xend_cpuid *xend)
{
int rc;
unsigned int i, j, regs[4] = {}, polregs[4] = {};
@@ -324,7 +305,8 @@ int xc_cpuid_set(
goto fail;
}
for ( i = 0; i < policy_leaves; ++i )
- if ( leaves[i].leaf == input[0] && leaves[i].subleaf == input[1] )
+ if ( leaves[i].leaf == xend->leaf &&
+ leaves[i].subleaf == xend->subleaf )
{
polregs[0] = leaves[i].a;
polregs[1] = leaves[i].b;
@@ -345,7 +327,8 @@ int xc_cpuid_set(
goto fail;
}
for ( i = 0; i < policy_leaves; ++i )
- if ( leaves[i].leaf == input[0] && leaves[i].subleaf == input[1] )
+ if ( leaves[i].leaf == xend->leaf &&
+ leaves[i].subleaf == xend->subleaf )
{
regs[0] = leaves[i].a;
regs[1] = leaves[i].b;
@@ -356,7 +339,7 @@ int xc_cpuid_set(
for ( i = 0; i < 4; i++ )
{
- if ( config[i] == NULL )
+ if ( xend->policy[i] == NULL )
{
regs[i] = polregs[i];
continue;
@@ -375,14 +358,14 @@ int xc_cpuid_set(
unsigned char polval = !!((polregs[i] & (1U << (31 - j))));
rc = -EINVAL;
- if ( !strchr("10xks", config[i][j]) )
+ if ( !strchr("10xks", xend->policy[i][j]) )
goto fail;
- if ( config[i][j] == '1' )
+ if ( xend->policy[i][j] == '1' )
val = 1;
- else if ( config[i][j] == '0' )
+ else if ( xend->policy[i][j] == '0' )
val = 0;
- else if ( config[i][j] == 'x' )
+ else if ( xend->policy[i][j] == 'x' )
val = polval;
if ( val )
@@ -393,7 +376,7 @@ int xc_cpuid_set(
}
/* Feed the transformed leaf back up to Xen. */
- leaves[0] = (xen_cpuid_leaf_t){ input[0], input[1],
+ leaves[0] = (xen_cpuid_leaf_t){ xend->leaf, xend->subleaf,
regs[0], regs[1], regs[2], regs[3] };
rc = xc_set_domain_cpu_policy(xch, domid, 1, leaves, 0, NULL,
&err_leaf, &err_subleaf, &err_msr);
diff --git a/tools/libxl/libxl.h b/tools/libxl/libxl.h
index 71709dc585..1cd6c38e83 100644
--- a/tools/libxl/libxl.h
+++ b/tools/libxl/libxl.h
@@ -1310,11 +1310,11 @@ typedef struct {
void libxl_bitmap_init(libxl_bitmap *map);
void libxl_bitmap_dispose(libxl_bitmap *map);
-/* libxl_cpuid_policy_list is a dynamic array storing CPUID policies
- * for multiple leafs. It is terminated with an entry holding
- * XEN_CPUID_INPUT_UNUSED in input[0]
+/*
+ * 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 libxl__cpuid_policy libxl_cpuid_policy;
+typedef struct xc_xend_cpuid libxl_cpuid_policy;
typedef libxl_cpuid_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);
diff --git a/tools/libxl/libxl_cpuid.c b/tools/libxl/libxl_cpuid.c
index 796ec4f2d9..e001cbcd4f 100644
--- a/tools/libxl/libxl_cpuid.c
+++ b/tools/libxl/libxl_cpuid.c
@@ -288,7 +288,7 @@ int libxl_cpuid_parse_config(libxl_cpuid_policy_list
*cpuid, const char* str)
char *sep, *val, *endptr;
int i;
const struct cpuid_flags *flag;
- struct libxl__cpuid_policy *entry;
+ struct xc_xend_cpuid *entry;
unsigned long num;
char flags[33], *resstr;
@@ -366,7 +366,7 @@ int libxl_cpuid_parse_config_xend(libxl_cpuid_policy_list
*cpuid,
char *endptr;
unsigned long value;
uint32_t leaf, subleaf = XEN_CPUID_INPUT_UNUSED;
- struct libxl__cpuid_policy *entry;
+ struct xc_xend_cpuid *entry;
/* parse the leaf number */
value = strtoul(str, &endptr, 0);
@@ -442,8 +442,7 @@ void libxl__cpuid_legacy(libxl_ctx *ctx, uint32_t domid,
return;
for (i = 0; cpuid[i].input[0] != XEN_CPUID_INPUT_UNUSED; i++)
- xc_cpuid_set(ctx->xch, domid, cpuid[i].input,
- (const char**)cpuid[i].policy);
+ xc_cpuid_set(ctx->xch, domid, &cpuid[i]);
}
static const char *input_names[2] = { "leaf", "subleaf" };
diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index c7ece066c4..79c2bf5f5e 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -2056,16 +2056,6 @@ typedef yajl_gen_status
(*libxl__gen_json_callback)(yajl_gen hand, void *);
_hidden char *libxl__object_to_json(libxl_ctx *ctx, const char *type,
libxl__gen_json_callback gen, void *p);
- /* holds the CPUID response for a single CPUID leaf
- * input contains the value of the EAX and ECX register,
- * and each policy string contains a filter to apply to
- * the host given values for that particular leaf.
- */
-struct libxl__cpuid_policy {
- uint32_t input[2];
- char *policy[4];
-};
-
_hidden void libxl__cpuid_legacy(libxl_ctx *ctx, uint32_t domid,
libxl_domain_build_info *info);
--
generated by git-patchbot for /home/xen/git/xen.git#staging
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