[PATCH v2 1/3] eal: add x86 cpuid support for monitorx

[Sivaprasad Tummala]

Add a new CPUID flag to indicate support for monitorx instruction
on AMD Epyc processors.

Signed-off-by: Sivaprasad Tummala <sivaprasad.tummala at amd.com>
---
 lib/eal/include/generic/rte_cpuflags.h | 2 ++
 lib/eal/x86/include/rte_cpuflags.h     | 1 +
 lib/eal/x86/rte_cpuflags.c             | 3 +++
 3 files changed, 6 insertions(+)

diff --git a/lib/eal/include/generic/rte_cpuflags.h b/lib/eal/include/generic/rte_cpuflags.h
index d35551e931..db653a8dd7 100644
--- a/lib/eal/include/generic/rte_cpuflags.h
+++ b/lib/eal/include/generic/rte_cpuflags.h
@@ -26,6 +26,8 @@ struct rte_cpu_intrinsics {
 	/**< indicates support for rte_power_pause function */
 	uint32_t power_monitor_multi : 1;
 	/**< indicates support for rte_power_monitor_multi function */
+	uint32_t amd_power_monitorx : 1;
+	/**< indicates amd support for rte_power_monitor function */
 };
 
 /**
diff --git a/lib/eal/x86/include/rte_cpuflags.h b/lib/eal/x86/include/rte_cpuflags.h
index 92e90fb6e0..d3e608533a 100644
--- a/lib/eal/x86/include/rte_cpuflags.h
+++ b/lib/eal/x86/include/rte_cpuflags.h
@@ -133,6 +133,7 @@ enum rte_cpu_flag_t {
 	RTE_CPUFLAG_AVX512VP2INTERSECT,     /**< AVX512 Two Register Intersection */
 
 	RTE_CPUFLAG_WAITPKG,                /**< UMONITOR/UMWAIT/TPAUSE */
+	RTE_CPUFLAG_MONITORX,               /**< MONITORX */
 
 	/* The last item */
 	RTE_CPUFLAG_NUMFLAGS,               /**< This should always be the last! */
diff --git a/lib/eal/x86/rte_cpuflags.c b/lib/eal/x86/rte_cpuflags.c
index d6b518251b..ae2e0a8470 100644
--- a/lib/eal/x86/rte_cpuflags.c
+++ b/lib/eal/x86/rte_cpuflags.c
@@ -133,6 +133,7 @@ const struct feature_entry rte_cpu_feature_table[] = {
 
 	FEAT_DEF(LAHF_SAHF, 0x80000001, 0, RTE_REG_ECX,  0)
 	FEAT_DEF(LZCNT, 0x80000001, 0, RTE_REG_ECX,  4)
+	FEAT_DEF(MONITORX, 0x80000001, 0, RTE_REG_ECX,  29)
 
 	FEAT_DEF(SYSCALL, 0x80000001, 0, RTE_REG_EDX, 11)
 	FEAT_DEF(XD, 0x80000001, 0, RTE_REG_EDX, 20)
@@ -191,5 +192,7 @@ rte_cpu_get_intrinsics_support(struct rte_cpu_intrinsics *intrinsics)
 		intrinsics->power_pause = 1;
 		if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_RTM))
 			intrinsics->power_monitor_multi = 1;
+	} else if (rte_cpu_get_flag_enabled(RTE_CPUFLAG_MONITORX)) {
+		intrinsics->amd_power_monitorx = 1;
 	}
 }
-- 
2.34.1