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>,
Andy Lutomirski <luto@kernel.org>
Subject: [PATCH v4 02/10] x86/hyper-v: stash the max number of virtual/logical processor
Date: Wed, 24 May 2017 14:03:57 +0200 [thread overview]
Message-ID: <20170524120405.19079-3-vkuznets@redhat.com> (raw)
In-Reply-To: <20170524120405.19079-1-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>
Acked-by: K. Y. Srinivasan <kys@microsoft.com>
Tested-by: Simon Xiao <sixiao@microsoft.com>
Tested-by: Srikanth Myakam <v-srm@microsoft.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 91acec7..d42b6eb 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,
};
--
2.9.4
next prev parent reply other threads:[~2017-05-24 12:04 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-24 12:03 [PATCH v4 00/10] Hyper-V: praravirtualized remote TLB flushing and hypercall improvements Vitaly Kuznetsov
2017-05-24 12:03 ` [PATCH v4 01/10] x86/hyper-v: include hyperv/ only when CONFIG_HYPERV is set Vitaly Kuznetsov
2017-05-24 12:03 ` Vitaly Kuznetsov [this message]
2017-05-27 17:43 ` [PATCH v4 02/10] x86/hyper-v: stash the max number of virtual/logical processor Andy Shevchenko
2017-06-05 15:24 ` Steven Rostedt
2017-06-05 15:30 ` Stephen Hemminger
2017-05-24 12:03 ` [PATCH v4 03/10] x86/hyper-v: make hv_do_hypercall() inline Vitaly Kuznetsov
2017-05-27 17:46 ` Andy Shevchenko
2017-05-24 12:03 ` [PATCH v4 04/10] x86/hyper-v: fast hypercall implementation Vitaly Kuznetsov
2017-05-27 17:49 ` Andy Shevchenko
2017-05-24 12:04 ` [PATCH v4 05/10] hyper-v: use fast hypercall for HVCALL_SIGNAL_EVENT Vitaly Kuznetsov
2017-05-27 17:50 ` Andy Shevchenko
2017-05-24 12:04 ` [PATCH v4 06/10] x86/hyper-v: implement rep hypercalls Vitaly Kuznetsov
2017-05-24 12:04 ` [PATCH v4 07/10] hyper-v: globalize vp_index Vitaly Kuznetsov
2017-05-24 12:04 ` [PATCH v4 08/10] x86/hyper-v: use hypercall for remote TLB flush Vitaly Kuznetsov
2017-05-24 12:04 ` [PATCH v4 09/10] x86/hyper-v: support extended CPU ranges for TLB flush hypercalls Vitaly Kuznetsov
2017-05-27 18:13 ` Andy Shevchenko
2017-05-24 12:04 ` [PATCH v4 10/10] tracing/hyper-v: trace hyperv_mmu_flush_tlb_others() Vitaly Kuznetsov
2017-06-05 15:50 ` Steven Rostedt
2017-06-05 16:19 ` Vitaly Kuznetsov
2017-06-07 13:52 ` Steven Rostedt
2017-06-07 14:03 ` Vitaly Kuznetsov
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