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From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Xen-devel <xen-devel@lists.xen.org>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>,
	Ian Jackson <Ian.Jackson@eu.citrix.com>
Subject: [PATCH v4 22/26] tools/libxc: Expose the automatically generated cpu featuremask information
Date: Wed, 23 Mar 2016 16:36:25 +0000	[thread overview]
Message-ID: <1458750989-28967-23-git-send-email-andrew.cooper3@citrix.com> (raw)
In-Reply-To: <1458750989-28967-1-git-send-email-andrew.cooper3@citrix.com>

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
---
CC: Ian Jackson <Ian.Jackson@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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  parent reply	other threads:[~2016-03-23 16:36 UTC|newest]

Thread overview: 72+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-03-23 16:36 [PATCH v4 00/26] x86: Improvements to cpuid handling for guests Andrew Cooper
2016-03-23 16:36 ` [PATCH v4 01/26] xen/public: Export cpu featureset information in the public API Andrew Cooper
2016-03-24 14:08   ` Jan Beulich
2016-03-24 14:12     ` Andrew Cooper
2016-03-24 14:16       ` Jan Beulich
2016-03-23 16:36 ` [PATCH v4 02/26] xen/x86: Script to automatically process featureset information Andrew Cooper
2016-03-23 16:36 ` [PATCH v4 03/26] xen/x86: Collect more cpuid feature leaves Andrew Cooper
2016-03-23 16:36 ` [PATCH v4 04/26] xen/x86: Mask out unknown features from Xen's capabilities Andrew Cooper
2016-03-23 16:36 ` [PATCH v4 05/26] xen/x86: Annotate special features Andrew Cooper
2016-03-23 16:36 ` [PATCH v4 06/26] xen/x86: Annotate VM applicability in featureset Andrew Cooper
2016-03-23 16:36 ` [PATCH v4 07/26] xen/x86: Calculate maximum host and guest featuresets Andrew Cooper
2016-03-29  8:57   ` Jan Beulich
2016-03-23 16:36 ` [PATCH v4 08/26] xen/x86: Generate deep dependencies of features Andrew Cooper
2016-03-24 16:16   ` Jan Beulich
2016-03-23 16:36 ` [PATCH v4 09/26] xen/x86: Clear dependent features when clearing a cpu cap Andrew Cooper
2016-03-23 16:36 ` [PATCH v4 10/26] xen/x86: Improve disabling of features which have dependencies Andrew Cooper
2016-03-28 15:18   ` Konrad Rzeszutek Wilk
2016-03-23 16:36 ` [PATCH v4 11/26] xen/x86: Improvements to in-hypervisor cpuid sanity checks Andrew Cooper
2016-03-24 15:38   ` Andrew Cooper
2016-03-24 16:47   ` Jan Beulich
2016-03-24 17:01     ` Andrew Cooper
2016-03-24 17:11       ` Jan Beulich
2016-03-24 17:12         ` Andrew Cooper
2016-03-28 15:29   ` Konrad Rzeszutek Wilk
2016-04-05 15:25     ` Andrew Cooper
2016-03-23 16:36 ` [PATCH v4 12/26] x86/cpu: Move set_cpumask() calls into c_early_init() Andrew Cooper
2016-03-28 15:55   ` Konrad Rzeszutek Wilk
2016-04-05 16:19     ` Andrew Cooper
2016-03-23 16:36 ` [PATCH v4 13/26] x86/cpu: Sysctl and common infrastructure for levelling context switching Andrew Cooper
2016-03-24 16:58   ` Jan Beulich
2016-03-28 16:12   ` Konrad Rzeszutek Wilk
2016-04-05 16:33     ` Andrew Cooper
2016-03-28 17:37   ` Konrad Rzeszutek Wilk
2016-03-23 16:36 ` [PATCH v4 14/26] x86/cpu: Rework AMD masking MSR setup Andrew Cooper
2016-03-28 18:55   ` Konrad Rzeszutek Wilk
2016-04-05 16:44     ` Andrew Cooper
2016-03-23 16:36 ` [PATCH v4 15/26] x86/cpu: Rework Intel masking/faulting setup Andrew Cooper
2016-03-28 19:14   ` Konrad Rzeszutek Wilk
2016-04-05 16:45     ` Andrew Cooper
2016-03-23 16:36 ` [PATCH v4 16/26] x86/cpu: Context switch cpuid masks and faulting state in context_switch() Andrew Cooper
2016-03-28 19:27   ` Konrad Rzeszutek Wilk
2016-04-05 18:34     ` Andrew Cooper
2016-03-23 16:36 ` [PATCH v4 17/26] x86/pv: Provide custom cpumasks for PV domains Andrew Cooper
2016-03-28 19:40   ` Konrad Rzeszutek Wilk
2016-04-05 16:55     ` Andrew Cooper
2016-03-23 16:36 ` [PATCH v4 18/26] x86/domctl: Update PV domain cpumasks when setting cpuid policy Andrew Cooper
2016-03-24 17:04   ` Jan Beulich
2016-03-24 17:05     ` Andrew Cooper
2016-03-28 19:51   ` Konrad Rzeszutek Wilk
2016-03-23 16:36 ` [PATCH v4 19/26] xen+tools: Export maximum host and guest cpu featuresets via SYSCTL Andrew Cooper
2016-03-28 19:59   ` Konrad Rzeszutek Wilk
2016-03-23 16:36 ` [PATCH v4 20/26] tools/libxc: Modify bitmap operations to take void pointers Andrew Cooper
2016-03-28 20:05   ` Konrad Rzeszutek Wilk
2016-03-23 16:36 ` [PATCH v4 21/26] tools/libxc: Use public/featureset.h for cpuid policy generation Andrew Cooper
2016-03-28 20:07   ` Konrad Rzeszutek Wilk
2016-03-23 16:36 ` Andrew Cooper [this message]
2016-03-28 20:08   ` [PATCH v4 22/26] tools/libxc: Expose the automatically generated cpu featuremask information Konrad Rzeszutek Wilk
2016-03-23 16:36 ` [PATCH v4 23/26] tools: Utility for dealing with featuresets Andrew Cooper
2016-03-28 20:26   ` Konrad Rzeszutek Wilk
2016-03-23 16:36 ` [PATCH v4 24/26] tools/libxc: Wire a featureset through to cpuid policy logic Andrew Cooper
2016-03-28 20:39   ` Konrad Rzeszutek Wilk
2016-03-23 16:36 ` [PATCH v4 25/26] tools/libxc: Use featuresets rather than guesswork Andrew Cooper
2016-03-23 16:36 ` [PATCH v4 26/26] tools/libxc: Calculate xstate cpuid leaf from guest information Andrew Cooper
2016-03-24 17:20   ` Wei Liu
2016-03-31  7:48   ` Jan Beulich
2016-04-05 17:48     ` Andrew Cooper
2016-04-07  0:16       ` Jan Beulich
2016-04-07  0:40         ` Andrew Cooper
2016-04-07  0:56           ` Jan Beulich
2016-04-07 11:34             ` Andrew Cooper
2016-03-24 10:27 ` [PATCH v4 00/26] x86: Improvements to cpuid handling for guests Jan Beulich
2016-03-24 10:28   ` Andrew Cooper

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