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authorMaran Wilson <maran.wilson@oracle.com>2018-12-10 22:08:45 +0300
committerBoris Ostrovsky <boris.ostrovsky@oracle.com>2018-12-13 21:41:49 +0300
commit8cee3974b35bfb235d4637e10de5c5b364a9057e (patch)
tree13a789aad069c68c3deb6ae8b838bf379476ff23 /arch/x86/xen/enlighten_pvh.c
parent4df7363e52105bf7a8589efb2959c907872644fb (diff)
downloadlinux-8cee3974b35bfb235d4637e10de5c5b364a9057e.tar.xz
xen/pvh: Move Xen specific PVH VM initialization out of common file
We need to refactor PVH entry code so that support for other hypervisors like Qemu/KVM can be added more easily. This patch moves the small block of code used for initializing Xen PVH virtual machines into the Xen specific file. This initialization is not going to be needed for Qemu/KVM guests. Moving it out of the common file is going to allow us to compile kernels in the future without CONFIG_XEN that are still capable of being booted as a Qemu/KVM guest via the PVH entry point. Signed-off-by: Maran Wilson <maran.wilson@oracle.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Diffstat (limited to 'arch/x86/xen/enlighten_pvh.c')
-rw-r--r--arch/x86/xen/enlighten_pvh.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/arch/x86/xen/enlighten_pvh.c b/arch/x86/xen/enlighten_pvh.c
index 6be7bc719b38..41a7d6ad74e0 100644
--- a/arch/x86/xen/enlighten_pvh.c
+++ b/arch/x86/xen/enlighten_pvh.c
@@ -1,5 +1,12 @@
// SPDX-License-Identifier: GPL-2.0
-#include <linux/types.h>
+#include <linux/acpi.h>
+
+#include <asm/io_apic.h>
+#include <asm/hypervisor.h>
+
+#include <xen/xen.h>
+#include <asm/xen/interface.h>
+#include <asm/xen/hypercall.h>
/*
* PVH variables.
@@ -8,3 +15,16 @@
* after startup_{32|64} is invoked, which will clear the .bss segment.
*/
bool xen_pvh __attribute__((section(".data"))) = 0;
+
+void __init xen_pvh_init(void)
+{
+ u32 msr;
+ u64 pfn;
+
+ xen_pvh = 1;
+ xen_start_flags = pvh_start_info.flags;
+
+ msr = cpuid_ebx(xen_cpuid_base() + 2);
+ pfn = __pa(hypercall_page);
+ wrmsr_safe(msr, (u32)pfn, (u32)(pfn >> 32));
+}