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-rw-r--r--arch/x86/xen/enlighten_pvh.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/arch/x86/xen/enlighten_pvh.c b/arch/x86/xen/enlighten_pvh.c
new file mode 100644
index 0000000000..ada3868c02
--- /dev/null
+++ b/arch/x86/xen/enlighten_pvh.c
@@ -0,0 +1,74 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/acpi.h>
+#include <linux/export.h>
+
+#include <xen/hvc-console.h>
+
+#include <asm/io_apic.h>
+#include <asm/hypervisor.h>
+#include <asm/e820/api.h>
+
+#include <xen/xen.h>
+#include <asm/xen/interface.h>
+#include <asm/xen/hypercall.h>
+
+#include <xen/interface/memory.h>
+
+#include "xen-ops.h"
+
+/*
+ * PVH variables.
+ *
+ * The variable xen_pvh needs to live in a data segment since it is used
+ * after startup_{32|64} is invoked, which will clear the .bss segment.
+ */
+bool __ro_after_init xen_pvh;
+EXPORT_SYMBOL_GPL(xen_pvh);
+
+void __init xen_pvh_init(struct boot_params *boot_params)
+{
+ u32 msr;
+ u64 pfn;
+
+ xen_pvh = 1;
+ xen_domain_type = XEN_HVM_DOMAIN;
+ 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));
+
+ if (xen_initial_domain())
+ x86_init.oem.arch_setup = xen_add_preferred_consoles;
+ x86_init.oem.banner = xen_banner;
+
+ xen_efi_init(boot_params);
+
+ if (xen_initial_domain()) {
+ struct xen_platform_op op = {
+ .cmd = XENPF_get_dom0_console,
+ };
+ int ret = HYPERVISOR_platform_op(&op);
+
+ if (ret > 0)
+ xen_init_vga(&op.u.dom0_console,
+ min(ret * sizeof(char),
+ sizeof(op.u.dom0_console)),
+ &boot_params->screen_info);
+ }
+}
+
+void __init mem_map_via_hcall(struct boot_params *boot_params_p)
+{
+ struct xen_memory_map memmap;
+ int rc;
+
+ memmap.nr_entries = ARRAY_SIZE(boot_params_p->e820_table);
+ set_xen_guest_handle(memmap.buffer, boot_params_p->e820_table);
+ rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap);
+ if (rc) {
+ xen_raw_printk("XENMEM_memory_map failed (%d)\n", rc);
+ BUG();
+ }
+ boot_params_p->e820_entries = memmap.nr_entries;
+}