Signed-off-by: Andrew Cooper <andrew.coop...@citrix.com>
Acked-by: Wei Liu <wei.l...@citrix.com>
---
CC: Ian Jackson <ian.jack...@eu.citrix.com>
New in v2
---
tools/libxc/Makefile | 9 ++++++
tools/libxc/include/xenctrl.h | 14 ++++++++
tools/libxc/xc_cpuid_x86.c | 75 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 98 insertions(+)
diff --git a/tools/libxc/Makefile b/tools/libxc/Makefile
index 608404f..ef02c9d 100644
--- a/tools/libxc/Makefile
+++ b/tools/libxc/Makefile
@@ -145,6 +145,15 @@ $(eval $(genpath-target))
xc_private.h: _paths.h
+ifeq ($(CONFIG_X86),y)
+
+_xc_cpuid_autogen.h: $(XEN_ROOT)/xen/include/public/arch-x86/cpufeatureset.h
$(XEN_ROOT)/xen/tools/gen-cpuid.py
+ $(PYTHON) $(XEN_ROOT)/xen/tools/gen-cpuid.py -i $^ -o $@.new
+ $(call move-if-changed,$@.new,$@)
+
+build: _xc_cpuid_autogen.h
+endif
+
$(CTRL_LIB_OBJS) $(GUEST_LIB_OBJS) \
$(CTRL_PIC_OBJS) $(GUEST_PIC_OBJS): xc_private.h
diff --git a/tools/libxc/include/xenctrl.h b/tools/libxc/include/xenctrl.h
index c136aa8..66acbd1 100644
--- a/tools/libxc/include/xenctrl.h
+++ b/tools/libxc/include/xenctrl.h
@@ -2533,6 +2533,20 @@ int xc_psr_cat_get_l3_info(xc_interface *xch, uint32_t
socket,
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);
+
+uint32_t xc_get_cpu_featureset_size(void);
+
+enum xc_static_cpu_featuremask {
+ XC_FEATUREMASK_KNOWN,
+ XC_FEATUREMASK_SPECIAL,
+ XC_FEATUREMASK_PV,
+ XC_FEATUREMASK_HVM_SHADOW,
+ XC_FEATUREMASK_HVM_HAP,
+ XC_FEATUREMASK_DEEP_FEATURES,
+};
+const uint32_t *xc_get_static_cpu_featuremask(enum xc_static_cpu_featuremask);
+const uint32_t *xc_get_feature_deep_deps(uint32_t feature);
+
#endif
/* Compat shims */
diff --git a/tools/libxc/xc_cpuid_x86.c b/tools/libxc/xc_cpuid_x86.c
index d3674db..0cffb36 100644
--- a/tools/libxc/xc_cpuid_x86.c
+++ b/tools/libxc/xc_cpuid_x86.c
@@ -28,6 +28,7 @@ enum {
#define XEN_CPUFEATURE(name, value) X86_FEATURE_##name = value,
#include <xen/arch-x86/cpufeatureset.h>
};
+#include "_xc_cpuid_autogen.h"
#define bitmaskof(idx) (1u << ((idx) & 31))
#define clear_bit(idx, dst) ((dst) &= ~bitmaskof(idx))
@@ -78,6 +79,80 @@ int xc_get_cpu_featureset(xc_interface *xch, uint32_t index,
return ret;
}
+uint32_t xc_get_cpu_featureset_size(void)
+{
+ return FEATURESET_NR_ENTRIES;
+}
+
+const uint32_t *xc_get_static_cpu_featuremask(
+ enum xc_static_cpu_featuremask mask)
+{
+ const static uint32_t known[FEATURESET_NR_ENTRIES] = INIT_KNOWN_FEATURES,
+ special[FEATURESET_NR_ENTRIES] = INIT_SPECIAL_FEATURES,
+ pv[FEATURESET_NR_ENTRIES] = INIT_PV_FEATURES,
+ hvm_shadow[FEATURESET_NR_ENTRIES] = INIT_HVM_SHADOW_FEATURES,
+ hvm_hap[FEATURESET_NR_ENTRIES] = INIT_HVM_HAP_FEATURES,
+ deep_features[FEATURESET_NR_ENTRIES] = INIT_DEEP_FEATURES;
+
+ XC_BUILD_BUG_ON(ARRAY_SIZE(known) != FEATURESET_NR_ENTRIES);
+ XC_BUILD_BUG_ON(ARRAY_SIZE(special) != FEATURESET_NR_ENTRIES);
+ XC_BUILD_BUG_ON(ARRAY_SIZE(pv) != FEATURESET_NR_ENTRIES);
+ XC_BUILD_BUG_ON(ARRAY_SIZE(hvm_shadow) != FEATURESET_NR_ENTRIES);
+ XC_BUILD_BUG_ON(ARRAY_SIZE(hvm_hap) != FEATURESET_NR_ENTRIES);
+ XC_BUILD_BUG_ON(ARRAY_SIZE(deep_features) != FEATURESET_NR_ENTRIES);
+
+ switch ( mask )
+ {
+ case XC_FEATUREMASK_KNOWN:
+ return known;
+
+ case XC_FEATUREMASK_SPECIAL:
+ return special;
+
+ case XC_FEATUREMASK_PV:
+ return pv;
+
+ case XC_FEATUREMASK_HVM_SHADOW:
+ return hvm_shadow;
+
+ case XC_FEATUREMASK_HVM_HAP:
+ return hvm_hap;
+
+ case XC_FEATUREMASK_DEEP_FEATURES:
+ return deep_features;
+
+ default:
+ return NULL;
+ }
+}
+
+const uint32_t *xc_get_feature_deep_deps(uint32_t feature)
+{
+ static const struct {
+ uint32_t feature;
+ uint32_t fs[FEATURESET_NR_ENTRIES];
+ } deep_deps[] = INIT_DEEP_DEPS;
+
+ unsigned int start = 0, end = ARRAY_SIZE(deep_deps);
+
+ XC_BUILD_BUG_ON(ARRAY_SIZE(deep_deps) != NR_DEEP_DEPS);
+
+ /* deep_deps[] is sorted. Perform a binary search. */
+ while ( start < end )
+ {
+ unsigned int mid = start + ((end - start) / 2);
+
+ if ( deep_deps[mid].feature > feature )
+ end = mid;
+ else if ( deep_deps[mid].feature < feature )
+ start = mid + 1;
+ else
+ return deep_deps[mid].fs;
+ }
+
+ return NULL;
+}
+
struct cpuid_domain_info
{
enum
--
2.1.4
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