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9c11112c0e
Both xen_pvh and xen_start_flags get written just once early during init. Using the respective annotation then allows the open-coded placing in .data to go away. Additionally the former, like the latter, wants exporting, or else xen_pvh_domain() can't be used from modules. Signed-off-by: Jan Beulich <jbeulich@suse.com> Reviewed-by: Juergen Gross <jgross@suse.com> Link: https://lore.kernel.org/r/8155ed26-5a1d-c06f-42d8-596d26e75849@suse.com Signed-off-by: Juergen Gross <jgross@suse.com>
61 lines
1.4 KiB
C
61 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/acpi.h>
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#include <linux/export.h>
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#include <xen/hvc-console.h>
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#include <asm/io_apic.h>
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#include <asm/hypervisor.h>
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#include <asm/e820/api.h>
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#include <xen/xen.h>
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#include <asm/xen/interface.h>
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#include <asm/xen/hypercall.h>
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#include <xen/interface/memory.h>
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#include "xen-ops.h"
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/*
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* PVH variables.
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*
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* The variable xen_pvh needs to live in a data segment since it is used
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* after startup_{32|64} is invoked, which will clear the .bss segment.
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*/
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bool __ro_after_init xen_pvh;
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EXPORT_SYMBOL_GPL(xen_pvh);
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void __init xen_pvh_init(struct boot_params *boot_params)
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{
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u32 msr;
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u64 pfn;
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xen_pvh = 1;
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xen_domain_type = XEN_HVM_DOMAIN;
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xen_start_flags = pvh_start_info.flags;
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msr = cpuid_ebx(xen_cpuid_base() + 2);
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pfn = __pa(hypercall_page);
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wrmsr_safe(msr, (u32)pfn, (u32)(pfn >> 32));
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if (xen_initial_domain())
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x86_init.oem.arch_setup = xen_add_preferred_consoles;
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x86_init.oem.banner = xen_banner;
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xen_efi_init(boot_params);
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}
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void __init mem_map_via_hcall(struct boot_params *boot_params_p)
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{
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struct xen_memory_map memmap;
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int rc;
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memmap.nr_entries = ARRAY_SIZE(boot_params_p->e820_table);
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set_xen_guest_handle(memmap.buffer, boot_params_p->e820_table);
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rc = HYPERVISOR_memory_op(XENMEM_memory_map, &memmap);
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if (rc) {
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xen_raw_printk("XENMEM_memory_map failed (%d)\n", rc);
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BUG();
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}
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boot_params_p->e820_entries = memmap.nr_entries;
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}
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