linux-kernel - [PATCH v2 03/11] xen/hvmlite: Initialize HVMlite kernel

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Message-Id: <1454341137-14110-4-git-send-email-boris.ostrovsky@oracle.com>
Date:	Mon,  1 Feb 2016 10:38:49 -0500
From:	Boris Ostrovsky <boris.ostrovsky@...cle.com>
To:	david.vrabel@...rix.com, konrad.wilk@...cle.com
Cc:	xen-devel@...ts.xenproject.org, linux-kernel@...r.kernel.org,
	roger.pau@...rix.com, mcgrof@...e.com,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>
Subject: [PATCH v2 03/11] xen/hvmlite: Initialize HVMlite kernel

HVMlite guests need to make a few additional initialization calls
compared to regular HVM guests.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@...cle.com>
---
 arch/x86/xen/enlighten.c |   18 ++++++++++++------
 1 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 5f05fa2..1409de6 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -1863,15 +1863,21 @@ static void __init init_hvm_pv_info(void)
 	minor = eax & 0xffff;
 	printk(KERN_INFO "Xen version %d.%d.\n", major, minor);
 
-	cpuid(base + 2, &pages, &msr, &ecx, &edx);
-
-	pfn = __pa(hypercall_page);
-	wrmsr_safe(msr, (u32)pfn, (u32)(pfn >> 32));
+	/* HVMlite set up hypercall page earlier in xen_prepare_hvmlite() */
+	if (xen_hvmlite) {
+		pv_info.name = "Xen HVMlite";
+		pv_info.paravirt_enabled = 1;
+		xen_init_apic();
+		machine_ops = xen_machine_ops;
+	} else {
+		pv_info.name = "Xen HVM";
+		cpuid(base + 2, &pages, &msr, &ecx, &edx);
+		pfn = __pa(hypercall_page);
+		wrmsr_safe(msr, (u32)pfn, (u32)(pfn >> 32));
+	}
 
 	xen_setup_features();
 
-	pv_info.name = "Xen HVM";
-
 	xen_domain_type = XEN_HVM_DOMAIN;
 }
 
-- 
1.7.1