libs/light: use the feature names from cpufeatureset.h

The current implementation in libxl_cpuid_parse_config() requires
keeping a list of cpuid feature bits that should be mostly in sync
with the contents of cpufeatureset.h.

Avoid such duplication by using the automatically generated list of
cpuid features in INIT_FEATURE_NAMES in order to map feature names to
featureset bits, and then translate from featureset bits into cpuid
leaf, subleaf, register tuple.

Note that the full contents of the previous cpuid translation table
can't be removed.  That's because some feature names allowed by libxl
are not described in the featuresets, or because naming has diverged
and the previous nomenclature is preserved for compatibility reasons.

Should result in no functional change observed by callers, albeit some
new cpuid features will be available as a result of the change.

While there constify cpuid_flags name field.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
---
There's currently no table to map from featureset word into cpuid
leaf, so open-code one (feature_to_cpuid).  Otherwise we would need to
parse the comments in cpufeatureset.h in order to obtain the
leaf/subleaf/register each word maps into.

One possible way of improving would be to use a cpu_policy and
featureset in libxl_cpuid_parse_config(), but that requires more work,
and the proposed patch is already an improvement over the current
status.

diff --git a/docs/man/xl.cfg.5.pod.in b/docs/man/xl.cfg.5.pod.in
index 24ac92718288a6e67e5ca9d11fd9f479e6621e1e..edc308259dc391bf44cdc62ac9bd882ac1c28814 100644 (file)
--- a/docs/man/xl.cfg.5.pod.in
+++ b/docs/man/xl.cfg.5.pod.in
@@ -2010,24 +2010,8 @@ proccount procpkg stepping
 
 =back
 
-List of keys taking a character:
-
-=over 4
-
-3dnow 3dnowext 3dnowprefetch abm acpi adx aes altmovcr8 apic arat avx avx2
-avx512-4fmaps avx512-4vnniw avx512bw avx512cd avx512dq avx512er avx512f
-avx512ifma avx512pf avx512vbmi avx512vl bmi1 bmi2 clflushopt clfsh clwb cmov
-cmplegacy cmpxchg16 cmpxchg8 cmt cntxid dca de ds dscpl dtes64 erms est extapic
-f16c ffxsr fma fma4 fpu fsgsbase fxsr hle htt hypervisor ia64 ibs invpcid
-invtsc lahfsahf lm lwp mca mce misalignsse mmx mmxext monitor movbe mpx msr
-mtrr nodeid nx ospke osvw osxsave pae page1gb pat pbe pcid pclmulqdq pdcm
-perfctr_core perfctr_nb pge pku popcnt pse pse36 psn rdrand rdseed rdtscp rtm
-sha skinit smap smep smx ss sse sse2 sse3 sse4.1 sse4.2 sse4_1 sse4_2 sse4a
-ssse3 svm svm_decode svm_lbrv svm_npt svm_nrips svm_pausefilt svm_tscrate
-svm_vmcbclean syscall sysenter tbm tm tm2 topoext tsc tsc-deadline tsc_adjust
-umip vme vmx wdt x2apic xop xsave xtpr
-
-=back
+List of keys taking a character can be found in the public header file
+L<arch-x86/cpufeatureset.h|http://xenbits.xen.org/docs/unstable/hypercall/x86_64/include,public,arch-x86,cpufeatureset.h.html>
 
 =back
 

diff --git a/tools/libs/light/libxl_cpuid.c b/tools/libs/light/libxl_cpuid.c
index f5ce9f97959c0f5799c948b153fde8efb1495f51..e42344121a35bf82b11746ead759afbd27642399 100644 (file)
--- a/tools/libs/light/libxl_cpuid.c
+++ b/tools/libs/light/libxl_cpuid.c
@@ -14,6 +14,8 @@
 
 #include "libxl_internal.h"
 
+#include <xen/lib/x86/cpu-policy.h>
+
 int libxl__cpuid_policy_is_empty(libxl_cpuid_policy_list *pl)
 {
     return !libxl_cpuid_policy_list_length(pl);
@@ -51,7 +53,7 @@ void libxl_cpuid_dispose(libxl_cpuid_policy_list *p_cpuid_list)
  * Used for the static structure describing all features.
  */
 struct cpuid_flags {
-    char* name;
+    const char* name;
     uint32_t leaf;
     uint32_t subleaf;
     int reg;
@@ -81,6 +83,14 @@ static libxl_cpuid_policy_list cpuid_find_match(libxl_cpuid_policy_list *list,
     return *list + i;
 }
 
+static int search_feature(const void *a, const void *b)
+{
+    const char *key = a;
+    const char *feat = ((struct { const char *n; } *)b)->n;
+
+    return strncmp(key, feat, strlen(key)) ?: strlen(key) - strlen(feat);
+}
+
 /* parse a single key=value pair and translate it into the libxc
  * used interface using 32-characters strings for each register.
  * Will overwrite earlier entries and thus can be called multiple
@@ -101,208 +111,37 @@ int libxl_cpuid_parse_config(libxl_cpuid_policy_list *cpuid, const char* str)
         {"proccount",    0x00000001, NA, CPUID_REG_EBX, 16,  8},
         {"localapicid",  0x00000001, NA, CPUID_REG_EBX, 24,  8},
 
-        {"sse3",         0x00000001, NA, CPUID_REG_ECX,  0,  1},
-        {"pclmulqdq",    0x00000001, NA, CPUID_REG_ECX,  1,  1},
-        {"dtes64",       0x00000001, NA, CPUID_REG_ECX,  2,  1},
-        {"monitor",      0x00000001, NA, CPUID_REG_ECX,  3,  1},
-        {"dscpl",        0x00000001, NA, CPUID_REG_ECX,  4,  1},
-        {"vmx",          0x00000001, NA, CPUID_REG_ECX,  5,  1},
-        {"smx",          0x00000001, NA, CPUID_REG_ECX,  6,  1},
         {"est",          0x00000001, NA, CPUID_REG_ECX,  7,  1},
-        {"tm2",          0x00000001, NA, CPUID_REG_ECX,  8,  1},
-        {"ssse3",        0x00000001, NA, CPUID_REG_ECX,  9,  1},
         {"cntxid",       0x00000001, NA, CPUID_REG_ECX, 10,  1},
-        {"fma",          0x00000001, NA, CPUID_REG_ECX, 12,  1},
         {"cmpxchg16",    0x00000001, NA, CPUID_REG_ECX, 13,  1},
-        {"xtpr",         0x00000001, NA, CPUID_REG_ECX, 14,  1},
-        {"pdcm",         0x00000001, NA, CPUID_REG_ECX, 15,  1},
-        {"pcid",         0x00000001, NA, CPUID_REG_ECX, 17,  1},
-        {"dca",          0x00000001, NA, CPUID_REG_ECX, 18,  1},
         /* Linux uses sse4_{1,2}.  Keep sse4.{1,2} for compatibility */
-        {"sse4_1",       0x00000001, NA, CPUID_REG_ECX, 19,  1},
         {"sse4.1",       0x00000001, NA, CPUID_REG_ECX, 19,  1},
-        {"sse4_2",       0x00000001, NA, CPUID_REG_ECX, 20,  1},
         {"sse4.2",       0x00000001, NA, CPUID_REG_ECX, 20,  1},
-        {"x2apic",       0x00000001, NA, CPUID_REG_ECX, 21,  1},
-        {"movbe",        0x00000001, NA, CPUID_REG_ECX, 22,  1},
-        {"popcnt",       0x00000001, NA, CPUID_REG_ECX, 23,  1},
-        {"tsc-deadline", 0x00000001, NA, CPUID_REG_ECX, 24,  1},
         {"aes",          0x00000001, NA, CPUID_REG_ECX, 25,  1},
-        {"xsave",        0x00000001, NA, CPUID_REG_ECX, 26,  1},
-        {"osxsave",      0x00000001, NA, CPUID_REG_ECX, 27,  1},
-        {"avx",          0x00000001, NA, CPUID_REG_ECX, 28,  1},
-        {"f16c",         0x00000001, NA, CPUID_REG_ECX, 29,  1},
-        {"rdrand",       0x00000001, NA, CPUID_REG_ECX, 30,  1},
-        {"hypervisor",   0x00000001, NA, CPUID_REG_ECX, 31,  1},
-
-        {"fpu",          0x00000001, NA, CPUID_REG_EDX,  0,  1},
-        {"vme",          0x00000001, NA, CPUID_REG_EDX,  1,  1},
-        {"de",           0x00000001, NA, CPUID_REG_EDX,  2,  1},
-        {"pse",          0x00000001, NA, CPUID_REG_EDX,  3,  1},
-        {"tsc",          0x00000001, NA, CPUID_REG_EDX,  4,  1},
-        {"msr",          0x00000001, NA, CPUID_REG_EDX,  5,  1},
-        {"pae",          0x00000001, NA, CPUID_REG_EDX,  6,  1},
-        {"mce",          0x00000001, NA, CPUID_REG_EDX,  7,  1},
+
         {"cmpxchg8",     0x00000001, NA, CPUID_REG_EDX,  8,  1},
-        {"apic",         0x00000001, NA, CPUID_REG_EDX,  9,  1},
         {"sysenter",     0x00000001, NA, CPUID_REG_EDX, 11,  1},
-        {"mtrr",         0x00000001, NA, CPUID_REG_EDX, 12,  1},
-        {"pge",          0x00000001, NA, CPUID_REG_EDX, 13,  1},
-        {"mca",          0x00000001, NA, CPUID_REG_EDX, 14,  1},
-        {"cmov",         0x00000001, NA, CPUID_REG_EDX, 15,  1},
-        {"pat",          0x00000001, NA, CPUID_REG_EDX, 16,  1},
-        {"pse36",        0x00000001, NA, CPUID_REG_EDX, 17,  1},
         {"psn",          0x00000001, NA, CPUID_REG_EDX, 18,  1},
         {"clfsh",        0x00000001, NA, CPUID_REG_EDX, 19,  1},
-        {"ds",           0x00000001, NA, CPUID_REG_EDX, 21,  1},
-        {"acpi",         0x00000001, NA, CPUID_REG_EDX, 22,  1},
-        {"mmx",          0x00000001, NA, CPUID_REG_EDX, 23,  1},
-        {"fxsr",         0x00000001, NA, CPUID_REG_EDX, 24,  1},
-        {"sse",          0x00000001, NA, CPUID_REG_EDX, 25,  1},
-        {"sse2",         0x00000001, NA, CPUID_REG_EDX, 26,  1},
-        {"ss",           0x00000001, NA, CPUID_REG_EDX, 27,  1},
-        {"htt",          0x00000001, NA, CPUID_REG_EDX, 28,  1},
         {"tm",           0x00000001, NA, CPUID_REG_EDX, 29,  1},
         {"ia64",         0x00000001, NA, CPUID_REG_EDX, 30,  1},
         {"pbe",          0x00000001, NA, CPUID_REG_EDX, 31,  1},
 
         {"arat",         0x00000006, NA, CPUID_REG_EAX,  2,  1},
 
-        {"fsgsbase",     0x00000007,  0, CPUID_REG_EBX,  0,  1},
-        {"tsc_adjust",   0x00000007,  0, CPUID_REG_EBX,  1,  1},
-        {"bmi1",         0x00000007,  0, CPUID_REG_EBX,  3,  1},
-        {"hle",          0x00000007,  0, CPUID_REG_EBX,  4,  1},
-        {"avx2",         0x00000007,  0, CPUID_REG_EBX,  5,  1},
-        {"smep",         0x00000007,  0, CPUID_REG_EBX,  7,  1},
-        {"bmi2",         0x00000007,  0, CPUID_REG_EBX,  8,  1},
-        {"erms",         0x00000007,  0, CPUID_REG_EBX,  9,  1},
-        {"invpcid",      0x00000007,  0, CPUID_REG_EBX, 10,  1},
-        {"rtm",          0x00000007,  0, CPUID_REG_EBX, 11,  1},
-        {"cmt",          0x00000007,  0, CPUID_REG_EBX, 12,  1},
-        {"mpx",          0x00000007,  0, CPUID_REG_EBX, 14,  1},
-        {"avx512f",      0x00000007,  0, CPUID_REG_EBX, 16,  1},
-        {"avx512dq",     0x00000007,  0, CPUID_REG_EBX, 17,  1},
-        {"rdseed",       0x00000007,  0, CPUID_REG_EBX, 18,  1},
-        {"adx",          0x00000007,  0, CPUID_REG_EBX, 19,  1},
-        {"smap",         0x00000007,  0, CPUID_REG_EBX, 20,  1},
-        {"avx512-ifma",  0x00000007,  0, CPUID_REG_EBX, 21,  1},
-        {"clflushopt",   0x00000007,  0, CPUID_REG_EBX, 23,  1},
-        {"clwb",         0x00000007,  0, CPUID_REG_EBX, 24,  1},
-        {"proc-trace",   0x00000007,  0, CPUID_REG_EBX, 25,  1},
-        {"avx512pf",     0x00000007,  0, CPUID_REG_EBX, 26,  1},
-        {"avx512er",     0x00000007,  0, CPUID_REG_EBX, 27,  1},
-        {"avx512cd",     0x00000007,  0, CPUID_REG_EBX, 28,  1},
-        {"sha",          0x00000007,  0, CPUID_REG_EBX, 29,  1},
-        {"avx512bw",     0x00000007,  0, CPUID_REG_EBX, 30,  1},
-        {"avx512vl",     0x00000007,  0, CPUID_REG_EBX, 31,  1},
-
-        {"prefetchwt1",  0x00000007,  0, CPUID_REG_ECX,  0,  1},
-        {"avx512-vbmi",  0x00000007,  0, CPUID_REG_ECX,  1,  1},
-        {"umip",         0x00000007,  0, CPUID_REG_ECX,  2,  1},
-        {"pku",          0x00000007,  0, CPUID_REG_ECX,  3,  1},
-        {"ospke",        0x00000007,  0, CPUID_REG_ECX,  4,  1},
-        {"avx512-vbmi2", 0x00000007,  0, CPUID_REG_ECX,  6,  1},
-        {"cet-ss",       0x00000007,  0, CPUID_REG_ECX,  7,  1},
-        {"gfni",         0x00000007,  0, CPUID_REG_ECX,  8,  1},
-        {"vaes",         0x00000007,  0, CPUID_REG_ECX,  9,  1},
-        {"vpclmulqdq",   0x00000007,  0, CPUID_REG_ECX, 10,  1},
-        {"avx512-vnni",  0x00000007,  0, CPUID_REG_ECX, 11,  1},
-        {"avx512-bitalg",0x00000007,  0, CPUID_REG_ECX, 12,  1},
-        {"avx512-vpopcntdq",0x00000007,0,CPUID_REG_ECX, 14,  1},
-        {"rdpid",        0x00000007,  0, CPUID_REG_ECX, 22,  1},
-        {"cldemote",     0x00000007,  0, CPUID_REG_ECX, 25,  1},
-        {"pks",          0x00000007,  0, CPUID_REG_ECX, 31,  1},
-
-        {"avx512-4vnniw",0x00000007,  0, CPUID_REG_EDX,  2,  1},
-        {"avx512-4fmaps",0x00000007,  0, CPUID_REG_EDX,  3,  1},
-        {"fsrm",         0x00000007,  0, CPUID_REG_EDX,  4,  1},
-        {"avx512-vp2intersect",0x00000007,0,CPUID_REG_EDX,8, 1},
-        {"srbds-ctrl",   0x00000007,  0, CPUID_REG_EDX,  9,  1},
-        {"md-clear",     0x00000007,  0, CPUID_REG_EDX, 10,  1},
-        {"serialize",    0x00000007,  0, CPUID_REG_EDX, 14,  1},
-        {"tsxldtrk",     0x00000007,  0, CPUID_REG_EDX, 16,  1},
-        {"cet-ibt",      0x00000007,  0, CPUID_REG_EDX, 20,  1},
-        {"avx512-fp16",  0x00000007,  0, CPUID_REG_EDX, 23,  1},
-        {"ibrsb",        0x00000007,  0, CPUID_REG_EDX, 26,  1},
-        {"stibp",        0x00000007,  0, CPUID_REG_EDX, 27,  1},
-        {"l1d-flush",    0x00000007,  0, CPUID_REG_EDX, 28,  1},
-        {"arch-caps",    0x00000007,  0, CPUID_REG_EDX, 29,  1},
-        {"core-caps",    0x00000007,  0, CPUID_REG_EDX, 30,  1},
-        {"ssbd",         0x00000007,  0, CPUID_REG_EDX, 31,  1},
-
-        {"avx-vnni",     0x00000007,  1, CPUID_REG_EAX,  4,  1},
-        {"avx512-bf16",  0x00000007,  1, CPUID_REG_EAX,  5,  1},
-        {"fzrm",         0x00000007,  1, CPUID_REG_EAX, 10,  1},
-        {"fsrs",         0x00000007,  1, CPUID_REG_EAX, 11,  1},
-        {"fsrcs",        0x00000007,  1, CPUID_REG_EAX, 12,  1},
-        {"wrmsrns",      0x00000007,  1, CPUID_REG_EAX, 19,  1},
-        {"avx-ifma",     0x00000007,  1, CPUID_REG_EAX, 23,  1},
-
-        {"avx-vnni-int8",0x00000007,  1, CPUID_REG_EDX,  4,  1},
-        {"avx-ne-convert",0x00000007, 1, CPUID_REG_EDX,  5,  1},
-        {"cet-sss",      0x00000007,  1, CPUID_REG_EDX, 18,  1},
-
-        {"intel-psfd",   0x00000007,  2, CPUID_REG_EDX,  0,  1},
-        {"ipred-ctrl",   0x00000007,  2, CPUID_REG_EDX,  1,  1},
-        {"rrsba-ctrl",   0x00000007,  2, CPUID_REG_EDX,  2,  1},
-        {"ddp-ctrl",     0x00000007,  2, CPUID_REG_EDX,  3,  1},
-        {"bhi-ctrl",     0x00000007,  2, CPUID_REG_EDX,  4,  1},
-        {"mcdt-no",      0x00000007,  2, CPUID_REG_EDX,  5,  1},
-
         {"lahfsahf",     0x80000001, NA, CPUID_REG_ECX,  0,  1},
         {"cmplegacy",    0x80000001, NA, CPUID_REG_ECX,  1,  1},
-        {"svm",          0x80000001, NA, CPUID_REG_ECX,  2,  1},
-        {"extapic",      0x80000001, NA, CPUID_REG_ECX,  3,  1},
         {"altmovcr8",    0x80000001, NA, CPUID_REG_ECX,  4,  1},
-        {"abm",          0x80000001, NA, CPUID_REG_ECX,  5,  1},
-        {"sse4a",        0x80000001, NA, CPUID_REG_ECX,  6,  1},
-        {"misalignsse",  0x80000001, NA, CPUID_REG_ECX,  7,  1},
-        {"3dnowprefetch",0x80000001, NA, CPUID_REG_ECX,  8,  1},
-        {"osvw",         0x80000001, NA, CPUID_REG_ECX,  9,  1},
-        {"ibs",          0x80000001, NA, CPUID_REG_ECX, 10,  1},
-        {"xop",          0x80000001, NA, CPUID_REG_ECX, 11,  1},
-        {"skinit",       0x80000001, NA, CPUID_REG_ECX, 12,  1},
-        {"wdt",          0x80000001, NA, CPUID_REG_ECX, 13,  1},
-        {"lwp",          0x80000001, NA, CPUID_REG_ECX, 15,  1},
-        {"fma4",         0x80000001, NA, CPUID_REG_ECX, 16,  1},
         {"nodeid",       0x80000001, NA, CPUID_REG_ECX, 19,  1},
-        {"tbm",          0x80000001, NA, CPUID_REG_ECX, 21,  1},
-        {"topoext",      0x80000001, NA, CPUID_REG_ECX, 22,  1},
         {"perfctr_core", 0x80000001, NA, CPUID_REG_ECX, 23,  1},
         {"perfctr_nb",   0x80000001, NA, CPUID_REG_ECX, 24,  1},
 
-        {"syscall",      0x80000001, NA, CPUID_REG_EDX, 11,  1},
-        {"nx",           0x80000001, NA, CPUID_REG_EDX, 20,  1},
-        {"mmxext",       0x80000001, NA, CPUID_REG_EDX, 22,  1},
-        {"ffxsr",        0x80000001, NA, CPUID_REG_EDX, 25,  1},
-        {"page1gb",      0x80000001, NA, CPUID_REG_EDX, 26,  1},
-        {"rdtscp",       0x80000001, NA, CPUID_REG_EDX, 27,  1},
-        {"lm",           0x80000001, NA, CPUID_REG_EDX, 29,  1},
-        {"3dnowext",     0x80000001, NA, CPUID_REG_EDX, 30,  1},
-        {"3dnow",        0x80000001, NA, CPUID_REG_EDX, 31,  1},
-
         {"procpkg",      0x00000004,  0, CPUID_REG_EAX, 26,  6},
 
         {"invtsc",       0x80000007, NA, CPUID_REG_EDX,  8,  1},
 
-        {"clzero",       0x80000008, NA, CPUID_REG_EBX,  0,  1},
-        {"rstr-fp-err-ptrs", 0x80000008, NA, CPUID_REG_EBX, 2, 1},
-        {"wbnoinvd",     0x80000008, NA, CPUID_REG_EBX,  9,  1},
-        {"ibpb",         0x80000008, NA, CPUID_REG_EBX, 12,  1},
-        {"ibrs",         0x80000008, NA, CPUID_REG_EBX, 14,  1},
-        {"amd-stibp",    0x80000008, NA, CPUID_REG_EBX, 15,  1},
-        {"ibrs-always",  0x80000008, NA, CPUID_REG_EBX, 16,  1},
-        {"stibp-always", 0x80000008, NA, CPUID_REG_EBX, 17,  1},
-        {"ibrs-fast",    0x80000008, NA, CPUID_REG_EBX, 18,  1},
-        {"ibrs-same-mode", 0x80000008, NA, CPUID_REG_EBX, 19,  1},
-        {"no-lmsl",      0x80000008, NA, CPUID_REG_EBX, 20,  1},
         {"ppin",         0x80000008, NA, CPUID_REG_EBX, 23,  1},
-        {"amd-ssbd",     0x80000008, NA, CPUID_REG_EBX, 24,  1},
-        {"virt-ssbd",    0x80000008, NA, CPUID_REG_EBX, 25,  1},
-        {"ssb-no",       0x80000008, NA, CPUID_REG_EBX, 26,  1},
-        {"psfd",         0x80000008, NA, CPUID_REG_EBX, 28,  1},
         {"btc-no",       0x80000008, NA, CPUID_REG_EBX, 29,  1},
-        {"ibpb-ret",     0x80000008, NA, CPUID_REG_EBX, 30,  1},
 
         {"nc",           0x80000008, NA, CPUID_REG_ECX,  0,  8},
         {"apicidsize",   0x80000008, NA, CPUID_REG_ECX, 12,  4},
@@ -316,22 +155,49 @@ int libxl_cpuid_parse_config(libxl_cpuid_policy_list *cpuid, const char* str)
         {"svm_pausefilt",0x8000000a, NA, CPUID_REG_EDX, 10,  1},
 
         {"lfence+",      0x80000021, NA, CPUID_REG_EAX,  2,  1},
-        {"nscb",         0x80000021, NA, CPUID_REG_EAX,  6,  1},
-        {"auto-ibrs",    0x80000021, NA, CPUID_REG_EAX,  8,  1},
-        {"cpuid-user-dis", 0x80000021, NA, CPUID_REG_EAX, 17, 1},
 
         {"maxhvleaf",    0x40000000, NA, CPUID_REG_EAX,  0,  8},
 
         {NULL, 0, NA, CPUID_REG_INV, 0, 0}
     };
+    static const struct feature_name {
+        const char *name;
+        unsigned int bit;
+    } features[] = INIT_FEATURE_NAMES;
+    static const struct {
+        uint32_t leaf, subleaf;
+        unsigned int reg;
+    } feature_to_cpuid[] = {
+        {0x00000001, NA, CPUID_REG_EDX},
+        {0x00000001, NA, CPUID_REG_ECX},
+        {0x80000001, NA, CPUID_REG_EDX},
+        {0x80000001, NA, CPUID_REG_ECX},
+        {0x0000000D,  1, CPUID_REG_EAX},
+        {0x00000007,  0, CPUID_REG_EBX},
+        {0x00000007,  0, CPUID_REG_ECX},
+        {0x80000007, NA, CPUID_REG_EDX},
+        {0x80000008, NA, CPUID_REG_EBX},
+        {0x00000007,  0, CPUID_REG_EDX},
+        {0x00000007,  1, CPUID_REG_EAX},
+        {0x80000021, NA, CPUID_REG_EAX},
+        {0x00000007,  1, CPUID_REG_EBX},
+        {0x00000007,  2, CPUID_REG_EDX},
+        {0x00000007,  1, CPUID_REG_ECX},
+        {0x00000007,  1, CPUID_REG_EDX},
+        {        NA, NA, CPUID_REG_INV}, /* MSR_ARCH_CAPS.eax */
+        {        NA, NA, CPUID_REG_INV}, /* MSR_ARCH_CAPS.edx */
+    };
 #undef NA
     char *sep, *val, *endptr;
     int i;
     const struct cpuid_flags *flag;
+    struct cpuid_flags f;
     struct xc_xend_cpuid *entry;
     unsigned long num;
     char flags[33], *resstr;
 
+    BUILD_BUG_ON(ARRAY_SIZE(feature_to_cpuid) != FEATURESET_NR_ENTRIES);
+
     sep = strchr(str, '=');
     if (sep == NULL) {
         return 1;
@@ -342,6 +208,28 @@ int libxl_cpuid_parse_config(libxl_cpuid_policy_list *cpuid, const char* str)
         if(!strncmp(str, flag->name, sep - str) && flag->name[sep - str] == 0)
             break;
     }
+    if (flag->name == NULL) {
+        const struct feature_name *feat;
+        /* Provide a NUL terminated feature name to the search helper. */
+        char *name = strndup(str, sep - str);
+
+        if (name == NULL)
+            return 4;
+
+        feat = bsearch(name, features, ARRAY_SIZE(features), sizeof(features[0]),
+                       search_feature);
+        free(name);
+
+        if (feat != NULL) {
+                f.name = feat->name;
+                f.leaf = feature_to_cpuid[feat->bit / 32].leaf;
+                f.subleaf = feature_to_cpuid[feat->bit / 32].subleaf;
+                f.reg = feature_to_cpuid[feat->bit / 32].reg;
+                f.bit = feat->bit % 32;
+                f.length = 1,
+                flag = &f;
+        }
+    }
     if (flag->name == NULL) {
         return 2;
     }

diff --git a/tools/xl/xl_parse.c b/tools/xl/xl_parse.c
index 1f6f47daf4e16b9724aca9c9fa90618ee201c2e2..80b189dea0c121efd7b909b8cdf7e3ada2509e3f 100644 (file)
--- a/tools/xl/xl_parse.c
+++ b/tools/xl/xl_parse.c
@@ -2620,6 +2620,9 @@ skip_usbdev:
                 case 3:
                     errstr = "illegal CPUID value (must be: [0|1|x|k|s])";
                     break;
+                case 4:
+                    errstr = "out of memory";
+                    break;
                 default:
                     errstr = "unknown error";
                     break;