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From: Vitaly Kuznetsov <vkuznets@redhat.com>
To: devel@linuxdriverproject.org, x86@kernel.org
Cc: linux-kernel@vger.kernel.org,
	"K. Y. Srinivasan" <kys@microsoft.com>,
	Haiyang Zhang <haiyangz@microsoft.com>,
	Stephen Hemminger <sthemmin@microsoft.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Jork Loeser <Jork.Loeser@microsoft.com>,
	Simon Xiao <sixiao@microsoft.com>
Subject: [PATCH v2 02/10] x86/hyper-v: stash the max number of virtual/logical processor
Date: Wed, 12 Apr 2017 12:43:18 +0200	[thread overview]
Message-ID: <20170412104326.19126-3-vkuznets@redhat.com> (raw)
In-Reply-To: <20170412104326.19126-1-vkuznets@redhat.com>

Max virtual processor will be needed for 'extended' hypercalls supporting
more than 64 vCPUs. While on it, unify on 'Hyper-V' in mshyperv.c as we
currently have a mix, report acquired misc features as well.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
---
 arch/x86/include/asm/mshyperv.h |  2 ++
 arch/x86/kernel/cpu/mshyperv.c  | 13 ++++++++++---
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h
index e654956..be3872a 100644
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -29,6 +29,8 @@ struct ms_hyperv_info {
 	u32 features;
 	u32 misc_features;
 	u32 hints;
+	u32 max_vp_index;
+	u32 max_lp_index;
 };
 
 extern struct ms_hyperv_info ms_hyperv;
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index 04cb8d3..a8b4765 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -175,9 +175,16 @@ static void __init ms_hyperv_init_platform(void)
 	ms_hyperv.misc_features = cpuid_edx(HYPERV_CPUID_FEATURES);
 	ms_hyperv.hints    = cpuid_eax(HYPERV_CPUID_ENLIGHTMENT_INFO);
 
-	pr_info("HyperV: features 0x%x, hints 0x%x\n",
+	pr_info("Hyper-V: features 0x%x, hints 0x%x\n",
 		ms_hyperv.features, ms_hyperv.hints);
 
+	ms_hyperv.max_vp_index = cpuid_eax(HVCPUID_IMPLEMENTATION_LIMITS);
+	ms_hyperv.max_lp_index = cpuid_ebx(HVCPUID_IMPLEMENTATION_LIMITS);
+
+	pr_info("Hyper-V: max %d virtual processors, %d logical processors\n",
+		ms_hyperv.max_vp_index, ms_hyperv.max_lp_index);
+
+
 	/*
 	 * Extract host information.
 	 */
@@ -203,7 +210,7 @@ static void __init ms_hyperv_init_platform(void)
 		rdmsrl(HV_X64_MSR_APIC_FREQUENCY, hv_lapic_frequency);
 		hv_lapic_frequency = div_u64(hv_lapic_frequency, HZ);
 		lapic_timer_frequency = hv_lapic_frequency;
-		pr_info("HyperV: LAPIC Timer Frequency: %#x\n",
+		pr_info("Hyper-V: LAPIC Timer Frequency: %#x\n",
 			lapic_timer_frequency);
 	}
 
@@ -237,7 +244,7 @@ static void __init ms_hyperv_init_platform(void)
 }
 
 const __refconst struct hypervisor_x86 x86_hyper_ms_hyperv = {
-	.name			= "Microsoft HyperV",
+	.name			= "Microsoft Hyper-V",
 	.detect			= ms_hyperv_platform,
 	.init_platform		= ms_hyperv_init_platform,
 };
-- 
2.9.3

  parent reply	other threads:[~2017-04-12 10:43 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-12 10:43 [PATCH v2 00/10] Hyper-V: praravirtualized remote TLB flushing and hypercall improvements Vitaly Kuznetsov
2017-04-12 10:43 ` [PATCH v2 01/10] x86/hyper-v: include hyperv/ only when CONFIG_HYPERV is set Vitaly Kuznetsov
2017-04-12 10:43 ` Vitaly Kuznetsov [this message]
2017-04-12 10:43 ` [PATCH v2 03/10] x86/hyper-v: make hv_do_hypercall() inline Vitaly Kuznetsov
2017-04-12 10:43 ` [PATCH v2 04/10] x86/hyper-v: fast hypercall implementation Vitaly Kuznetsov
2017-04-12 10:43 ` [PATCH v2 05/10] hyper-v: use fast hypercall for HVCALL_SIGNAL_EVENT Vitaly Kuznetsov
2017-04-12 10:43 ` [PATCH v2 06/10] x86/hyper-v: implement rep hypercalls Vitaly Kuznetsov
2017-04-12 10:43 ` [PATCH v2 07/10] hyper-v: globalize vp_index Vitaly Kuznetsov
2017-04-12 10:43 ` [PATCH v2 08/10] x86/hyper-v: use hypercall for remote TLB flush Vitaly Kuznetsov
2017-04-12 10:43 ` [PATCH v2 09/10] x86/hyper-v: support extended CPU ranges for TLB flush hypercalls Vitaly Kuznetsov
2017-04-12 10:43 ` [PATCH v2 10/10] tracing/hyper-v: trace hyperv_mmu_flush_tlb_others() Vitaly Kuznetsov
2017-05-04 20:00 ` [PATCH v2 00/10] Hyper-V: praravirtualized remote TLB flushing and hypercall improvements KY Srinivasan

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