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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>,
	"Andrew Cooper" <andrew.cooper3@citrix.com>,
	"Paul Durrant" <pdurrant@amazon.com>,
	"Michael Kelley" <mikelley@microsoft.com>,
	"Jan Beulich" <jbeulich@suse.com>,
	"Roger Pau Monné" <roger.pau@citrix.com>
Subject: [Xen-devel] [PATCH v7 07/10] DO NOT APPLY: x86/hyperv: issue an hypercall
Date: Tue,  4 Feb 2020 15:37:01 +0000	[thread overview]
Message-ID: <20200204153704.15934-8-liuwe@microsoft.com> (raw)
In-Reply-To: <20200204153704.15934-1-liuwe@microsoft.com>

Test if the infrastructure works.

Signed-off-by: Wei Liu <liuwe@microsoft.com>
---
 xen/arch/x86/guest/hyperv/hyperv.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/xen/arch/x86/guest/hyperv/hyperv.c b/xen/arch/x86/guest/hyperv/hyperv.c
index 888bda25b0..2a2afcb363 100644
--- a/xen/arch/x86/guest/hyperv/hyperv.c
+++ b/xen/arch/x86/guest/hyperv/hyperv.c
@@ -23,6 +23,7 @@
 
 #include <asm/fixmap.h>
 #include <asm/guest.h>
+#include <asm/guest/hyperv-hcall.h>
 #include <asm/guest/hyperv-tlfs.h>
 #include <asm/processor.h>
 
@@ -114,6 +115,19 @@ static void __init setup_hypercall_page(void)
     BUG_ON(!hypercall_msr.enable);
 
     set_fixmap_x(FIX_X_HYPERV_HCALL, mfn << PAGE_SHIFT);
+
+    /* XXX Wei: Issue an hypercall here to make sure things are set up
+     * correctly.  When there is actual use of the hypercall facility,
+     * this can be removed.
+     */
+    {
+        uint16_t r = hv_do_hypercall(0xffff, 0, 0);
+        BUG_ON(r != HV_STATUS_INVALID_HYPERCALL_CODE);
+        r = hv_do_fast_hypercall(0xffff, 0, 0);
+        BUG_ON(r != HV_STATUS_INVALID_HYPERCALL_CODE);
+
+        printk("Successfully issued Hyper-V hypercalls\n");
+    }
 }
 
 static void __init setup(void)
-- 
2.20.1


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  parent reply	other threads:[~2020-02-04 15:37 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-04 15:36 [Xen-devel] [PATCH v7 00/10] More Hyper-V infrastructures Wei Liu
2020-02-04 15:36 ` [Xen-devel] [PATCH v7 01/10] x86/hypervisor: make hypervisor_ap_setup return an error code Wei Liu
2020-02-04 16:48   ` Wei Liu
2020-02-04 16:56     ` Roger Pau Monné
2020-02-04 17:03       ` Wei Liu
2020-02-05 11:12   ` Jan Beulich
2020-02-05 12:09     ` Wei Liu
2020-02-05 12:42       ` Jan Beulich
2020-02-04 15:36 ` [Xen-devel] [PATCH v7 02/10] x86/smp: don't online cpu if hypervisor_ap_setup fails Wei Liu
2020-02-04 15:36 ` [Xen-devel] [PATCH v7 03/10] x86: provide executable fixmap facility Wei Liu
2020-02-05 11:15   ` Jan Beulich
2020-02-04 15:36 ` [Xen-devel] [PATCH v7 04/10] x86/hypervisor: provide hypervisor_fixup_e820 Wei Liu
2020-02-04 15:36 ` [Xen-devel] [PATCH v7 05/10] x86/hyperv: setup hypercall page Wei Liu
2020-02-05 14:04   ` Roger Pau Monné
2020-02-05 15:00     ` Wei Liu
2020-02-05 15:03       ` Wei Liu
2020-02-05 15:52   ` Durrant, Paul
2020-02-04 15:37 ` [Xen-devel] [PATCH v7 06/10] x86/hyperv: provide Hyper-V hypercall functions Wei Liu
2020-02-05 11:17   ` Jan Beulich
2020-02-04 15:37 ` Wei Liu [this message]
2020-02-04 15:37 ` [Xen-devel] [PATCH v7 08/10] x86/hyperv: provide percpu hypercall input page Wei Liu
2020-02-04 15:37 ` [Xen-devel] [PATCH v7 09/10] x86/hyperv: retrieve vp_index from Hyper-V Wei Liu
2020-02-04 15:37 ` [Xen-devel] [PATCH v7 10/10] x86/hyperv: setup VP assist page Wei Liu

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