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1b5e5ff68c
Xen PVH entry point requires to modify the environment provided by the boot loader, so that the ACPI RSDP is re-written to use the Xen generated RSDP instead of the native one. The current logic in the PVH entry point reserves a single page (4K) in order to copy the contents of the environment passed from the boot loader, so that the bootloader provided "acpi.rsdp" is dropped and a Xen specific one is added afterwards. This however doesn't scale well, as it's possible for the environment to be bigger than 4K. Bumping the buffer, or attempting to peek at the size of the metadata all seem to just add more complexity to a sensitive path. Instead introduce a new ACPI hook that allows setting the RSDP address directly, and use it from the PVH entry point to set the position of the Xen generated RSDP. This allows to reduce the logic in the PVH metadata processing, as there's no need to parse and filter the bootloader provided environment. Note that modifying the environment blob in-place is likely to not work. The RSDP address is provided as a string, it's possible the new RSDP location is higher than the current one, and the string with the new location would overrun the space used by the previous one. Sponsored by: Cloud Software Group PR: 277200 MFC: 3 days Reviewed by: markj kib Differential revision: https://reviews.freebsd.org/D46089
92 lines
3.2 KiB
C
92 lines
3.2 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2002 Mitsuru IWASAKI
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/******************************************************************************
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*
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* Name: acpica_machdep.h - arch-specific defines, etc.
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* $Revision$
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*
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*****************************************************************************/
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#ifndef __ACPICA_MACHDEP_H__
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#define __ACPICA_MACHDEP_H__
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#ifdef _KERNEL
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/*
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* Calling conventions:
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*
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* ACPI_SYSTEM_XFACE - Interfaces to host OS (handlers, threads)
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* ACPI_EXTERNAL_XFACE - External ACPI interfaces
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* ACPI_INTERNAL_XFACE - Internal ACPI interfaces
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* ACPI_INTERNAL_VAR_XFACE - Internal variable-parameter list interfaces
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*/
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#define ACPI_SYSTEM_XFACE
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#define ACPI_EXTERNAL_XFACE
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#define ACPI_INTERNAL_XFACE
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#define ACPI_INTERNAL_VAR_XFACE
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/* Asm macros */
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#define ACPI_ASM_MACROS
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#define BREAKPOINT3
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#define ACPI_DISABLE_IRQS() disable_intr()
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#define ACPI_ENABLE_IRQS() enable_intr()
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#define ACPI_FLUSH_CPU_CACHE() wbinvd()
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/* Section 5.2.10.1: global lock acquire/release functions */
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int acpi_acquire_global_lock(volatile uint32_t *);
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int acpi_release_global_lock(volatile uint32_t *);
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#define ACPI_ACQUIRE_GLOBAL_LOCK(GLptr, Acq) do { \
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(Acq) = acpi_acquire_global_lock(&((GLptr)->GlobalLock)); \
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} while (0)
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#define ACPI_RELEASE_GLOBAL_LOCK(GLptr, Acq) do { \
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(Acq) = acpi_release_global_lock(&((GLptr)->GlobalLock)); \
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} while (0)
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enum intr_trigger;
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enum intr_polarity;
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void acpi_SetDefaultIntrModel(int model);
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void acpi_cpu_c1(void);
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void acpi_cpu_idle_mwait(uint32_t mwait_hint);
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void *acpi_map_table(vm_paddr_t pa, const char *sig);
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void acpi_unmap_table(void *table);
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vm_paddr_t acpi_find_table(const char *sig);
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void madt_parse_interrupt_values(void *entry,
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enum intr_trigger *trig, enum intr_polarity *pol);
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extern int madt_found_sci_override;
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extern int (*apei_nmi)(void);
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void acpi_set_root(vm_paddr_t addr);
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#endif /* _KERNEL */
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#endif /* __ACPICA_MACHDEP_H__ */
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