From: Wei Liu <wl@xen.org>
To: Xen Development List <xen-devel@lists.xenproject.org>
Cc: "Wei Liu" <liuwe@microsoft.com>, "Wei Liu" <wl@xen.org>,
"Paul Durrant" <paul@xen.org>,
"Andrew Cooper" <andrew.cooper3@citrix.com>,
"Michael Kelley" <mikelley@microsoft.com>,
"Jan Beulich" <jbeulich@suse.com>,
"Roger Pau Monné" <roger.pau@citrix.com>
Subject: [Xen-devel] [PATCH v3 4/5] x86/hyperv: retrieve vp_index from Hyper-V
Date: Sun, 5 Jan 2020 16:48:00 +0000 [thread overview]
Message-ID: <20200105164801.26278-5-liuwe@microsoft.com> (raw)
In-Reply-To: <20200105164801.26278-1-liuwe@microsoft.com>
This will be useful when invoking hypercall that targets specific
vcpu(s).
Signed-off-by: Wei Liu <liuwe@microsoft.com>
---
v2:
1. Fold into setup_pcpu_arg function
---
xen/arch/x86/guest/hyperv/hyperv.c | 5 +++++
xen/include/asm-x86/guest/hyperv.h | 1 +
2 files changed, 6 insertions(+)
diff --git a/xen/arch/x86/guest/hyperv/hyperv.c b/xen/arch/x86/guest/hyperv/hyperv.c
index 7e046dfc04..e5f258c946 100644
--- a/xen/arch/x86/guest/hyperv/hyperv.c
+++ b/xen/arch/x86/guest/hyperv/hyperv.c
@@ -28,6 +28,7 @@ struct ms_hyperv_info __read_mostly ms_hyperv;
extern char hv_hypercall_page[];
DEFINE_PER_CPU_READ_MOSTLY(void *, hv_pcpu_input_arg);
+DEFINE_PER_CPU_READ_MOSTLY(unsigned int, hv_vp_index);
static const struct hypervisor_ops ops;
const struct hypervisor_ops *__init hyperv_probe(void)
@@ -87,6 +88,7 @@ static void __init setup_hypercall_page(void)
static void setup_hypercall_pcpu_arg(void)
{
void *mapping;
+ uint64_t vp_index_msr;
mapping = alloc_xenheap_page();
if ( !mapping )
@@ -94,6 +96,9 @@ static void setup_hypercall_pcpu_arg(void)
smp_processor_id());
this_cpu(hv_pcpu_input_arg) = mapping;
+
+ rdmsrl(HV_X64_MSR_VP_INDEX, vp_index_msr);
+ this_cpu(hv_vp_index) = vp_index_msr;
}
static void __init setup(void)
diff --git a/xen/include/asm-x86/guest/hyperv.h b/xen/include/asm-x86/guest/hyperv.h
index 6cf2eab62f..bae06c8a3a 100644
--- a/xen/include/asm-x86/guest/hyperv.h
+++ b/xen/include/asm-x86/guest/hyperv.h
@@ -66,6 +66,7 @@ struct ms_hyperv_info {
extern struct ms_hyperv_info ms_hyperv;
DECLARE_PER_CPU(void *, hv_pcpu_input_arg);
+DECLARE_PER_CPU(unsigned int, hv_vp_index);
const struct hypervisor_ops *hyperv_probe(void);
--
2.20.1
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next prev parent reply other threads:[~2020-01-05 16:48 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-05 16:47 [Xen-devel] [PATCH v3 0/5] More Hyper-V infrastructure Wei Liu
2020-01-05 16:47 ` [Xen-devel] [PATCH v3 1/5] x86/hyperv: setup hypercall page Wei Liu
2020-01-05 17:37 ` Andrew Cooper
2020-01-05 21:45 ` Wei Liu
2020-01-05 21:57 ` Andrew Cooper
2020-01-07 15:42 ` Wei Liu
2020-01-08 17:43 ` Wei Liu
2020-01-08 17:53 ` Andrew Cooper
2020-01-09 13:48 ` Wei Liu
2020-01-05 16:47 ` [Xen-devel] [PATCH v3 2/5] x86/hyperv: provide Hyper-V hypercall functions Wei Liu
2020-01-05 19:08 ` Andrew Cooper
2020-01-05 21:22 ` Wei Liu
2020-01-05 22:06 ` Andrew Cooper
2020-01-07 16:17 ` Wei Liu
2020-01-16 19:14 ` Andrew Cooper
2020-01-16 14:54 ` Wei Liu
2020-01-06 9:38 ` Jan Beulich
2020-01-07 16:21 ` Wei Liu
2020-01-05 16:47 ` [Xen-devel] [PATCH v3 3/5] x86/hyperv: provide percpu hypercall input page Wei Liu
2020-01-06 10:27 ` Jan Beulich
2020-01-07 16:33 ` Wei Liu
2020-01-07 16:45 ` Michael Kelley
2020-01-08 10:57 ` Jan Beulich
2020-01-07 17:08 ` Jan Beulich
2020-01-07 17:27 ` Wei Liu
2020-01-08 10:55 ` Jan Beulich
2020-01-08 15:54 ` Wei Liu
2020-01-05 16:48 ` Wei Liu [this message]
2020-01-06 9:59 ` [Xen-devel] [PATCH v3 4/5] x86/hyperv: retrieve vp_index from Hyper-V Paul Durrant
2020-01-06 10:31 ` Jan Beulich
2020-01-07 16:34 ` Wei Liu
2020-01-05 16:48 ` [Xen-devel] [PATCH v3 5/5] x86/hyperv: setup VP assist page Wei Liu
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