mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-26 07:15:03 +07:00
f14e953b19
To support addition of "bitmask" to MASKABLE_* macros, factor out the EXCPETION_PROLOG_1 macro. Make it explicit the interrupt masking supported by a gievn interrupt handler. Patch correspondingly extends the MASKABLE_* macros with an addition's parameter. "bitmask" parameter is passed to SOFTEN_TEST macro to decide on masking the interrupt. Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
418 lines
14 KiB
C
418 lines
14 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_POWERPC_HEAD_64_H
|
|
#define _ASM_POWERPC_HEAD_64_H
|
|
|
|
#include <asm/cache.h>
|
|
|
|
#ifdef __ASSEMBLY__
|
|
/*
|
|
* We can't do CPP stringification and concatination directly into the section
|
|
* name for some reason, so these macros can do it for us.
|
|
*/
|
|
.macro define_ftsec name
|
|
.section ".head.text.\name\()","ax",@progbits
|
|
.endm
|
|
.macro define_data_ftsec name
|
|
.section ".head.data.\name\()","a",@progbits
|
|
.endm
|
|
.macro use_ftsec name
|
|
.section ".head.text.\name\()"
|
|
.endm
|
|
|
|
/*
|
|
* Fixed (location) sections are used by opening fixed sections and emitting
|
|
* fixed section entries into them before closing them. Multiple fixed sections
|
|
* can be open at any time.
|
|
*
|
|
* Each fixed section created in a .S file must have corresponding linkage
|
|
* directives including location, added to arch/powerpc/kernel/vmlinux.lds.S
|
|
*
|
|
* For each fixed section, code is generated into it in the order which it
|
|
* appears in the source. Fixed section entries can be placed at a fixed
|
|
* location within the section using _LOCATION postifx variants. These must
|
|
* be ordered according to their relative placements within the section.
|
|
*
|
|
* OPEN_FIXED_SECTION(section_name, start_address, end_address)
|
|
* FIXED_SECTION_ENTRY_BEGIN(section_name, label1)
|
|
*
|
|
* USE_FIXED_SECTION(section_name)
|
|
* label3:
|
|
* li r10,128
|
|
* mv r11,r10
|
|
|
|
* FIXED_SECTION_ENTRY_BEGIN_LOCATION(section_name, label2, start_address, size)
|
|
* FIXED_SECTION_ENTRY_END_LOCATION(section_name, label2, start_address, size)
|
|
* CLOSE_FIXED_SECTION(section_name)
|
|
*
|
|
* ZERO_FIXED_SECTION can be used to emit zeroed data.
|
|
*
|
|
* Troubleshooting:
|
|
* - If the build dies with "Error: attempt to move .org backwards" at
|
|
* CLOSE_FIXED_SECTION() or elsewhere, there may be something
|
|
* unexpected being added there. Remove the '. = x_len' line, rebuild, and
|
|
* check what is pushing the section down.
|
|
* - If the build dies in linking, check arch/powerpc/tools/head_check.sh
|
|
* comments.
|
|
* - If the kernel crashes or hangs in very early boot, it could be linker
|
|
* stubs at the start of the main text.
|
|
*/
|
|
|
|
#define OPEN_FIXED_SECTION(sname, start, end) \
|
|
sname##_start = (start); \
|
|
sname##_end = (end); \
|
|
sname##_len = (end) - (start); \
|
|
define_ftsec sname; \
|
|
. = 0x0; \
|
|
start_##sname:
|
|
|
|
/*
|
|
* .linker_stub_catch section is used to catch linker stubs from being
|
|
* inserted in our .text section, above the start_text label (which breaks
|
|
* the ABS_ADDR calculation). See kernel/vmlinux.lds.S and tools/head_check.sh
|
|
* for more details. We would prefer to just keep a cacheline (0x80), but
|
|
* 0x100 seems to be how the linker aligns branch stub groups.
|
|
*/
|
|
#ifdef CONFIG_LD_HEAD_STUB_CATCH
|
|
#define OPEN_TEXT_SECTION(start) \
|
|
.section ".linker_stub_catch","ax",@progbits; \
|
|
linker_stub_catch: \
|
|
. = 0x4; \
|
|
text_start = (start) + 0x100; \
|
|
.section ".text","ax",@progbits; \
|
|
.balign 0x100; \
|
|
start_text:
|
|
#else
|
|
#define OPEN_TEXT_SECTION(start) \
|
|
text_start = (start); \
|
|
.section ".text","ax",@progbits; \
|
|
. = 0x0; \
|
|
start_text:
|
|
#endif
|
|
|
|
#define ZERO_FIXED_SECTION(sname, start, end) \
|
|
sname##_start = (start); \
|
|
sname##_end = (end); \
|
|
sname##_len = (end) - (start); \
|
|
define_data_ftsec sname; \
|
|
. = 0x0; \
|
|
. = sname##_len;
|
|
|
|
#define USE_FIXED_SECTION(sname) \
|
|
fs_label = start_##sname; \
|
|
fs_start = sname##_start; \
|
|
use_ftsec sname;
|
|
|
|
#define USE_TEXT_SECTION() \
|
|
fs_label = start_text; \
|
|
fs_start = text_start; \
|
|
.text
|
|
|
|
#define CLOSE_FIXED_SECTION(sname) \
|
|
USE_FIXED_SECTION(sname); \
|
|
. = sname##_len; \
|
|
end_##sname:
|
|
|
|
|
|
#define __FIXED_SECTION_ENTRY_BEGIN(sname, name, __align) \
|
|
USE_FIXED_SECTION(sname); \
|
|
.balign __align; \
|
|
.global name; \
|
|
name:
|
|
|
|
#define FIXED_SECTION_ENTRY_BEGIN(sname, name) \
|
|
__FIXED_SECTION_ENTRY_BEGIN(sname, name, IFETCH_ALIGN_BYTES)
|
|
|
|
#define FIXED_SECTION_ENTRY_BEGIN_LOCATION(sname, name, start, size) \
|
|
USE_FIXED_SECTION(sname); \
|
|
name##_start = (start); \
|
|
.if ((start) % (size) != 0); \
|
|
.error "Fixed section exception vector misalignment"; \
|
|
.endif; \
|
|
.if ((size) != 0x20) && ((size) != 0x80) && ((size) != 0x100); \
|
|
.error "Fixed section exception vector bad size"; \
|
|
.endif; \
|
|
.if (start) < sname##_start; \
|
|
.error "Fixed section underflow"; \
|
|
.abort; \
|
|
.endif; \
|
|
. = (start) - sname##_start; \
|
|
.global name; \
|
|
name:
|
|
|
|
#define FIXED_SECTION_ENTRY_END_LOCATION(sname, name, start, size) \
|
|
.if (start) + (size) > sname##_end; \
|
|
.error "Fixed section overflow"; \
|
|
.abort; \
|
|
.endif; \
|
|
.if (. - name > (start) + (size) - name##_start); \
|
|
.error "Fixed entry overflow"; \
|
|
.abort; \
|
|
.endif; \
|
|
. = ((start) + (size) - sname##_start); \
|
|
|
|
|
|
/*
|
|
* These macros are used to change symbols in other fixed sections to be
|
|
* absolute or related to our current fixed section.
|
|
*
|
|
* - DEFINE_FIXED_SYMBOL / FIXED_SYMBOL_ABS_ADDR is used to find the
|
|
* absolute address of a symbol within a fixed section, from any section.
|
|
*
|
|
* - ABS_ADDR is used to find the absolute address of any symbol, from within
|
|
* a fixed section.
|
|
*/
|
|
#define DEFINE_FIXED_SYMBOL(label) \
|
|
label##_absolute = (label - fs_label + fs_start)
|
|
|
|
#define FIXED_SYMBOL_ABS_ADDR(label) \
|
|
(label##_absolute)
|
|
|
|
#define ABS_ADDR(label) (label - fs_label + fs_start)
|
|
|
|
/*
|
|
* Following are the BOOK3S exception handler helper macros.
|
|
* Handlers come in a number of types, and each type has a number of varieties.
|
|
*
|
|
* EXC_REAL_* - real, unrelocated exception vectors
|
|
* EXC_VIRT_* - virt (AIL), unrelocated exception vectors
|
|
* TRAMP_REAL_* - real, unrelocated helpers (virt can call these)
|
|
* TRAMP_VIRT_* - virt, unreloc helpers (in practice, real can use)
|
|
* TRAMP_KVM - KVM handlers that get put into real, unrelocated
|
|
* EXC_COMMON - virt, relocated common handlers
|
|
*
|
|
* The EXC handlers are given a name, and branch to name_common, or the
|
|
* appropriate KVM or masking function. Vector handler verieties are as
|
|
* follows:
|
|
*
|
|
* EXC_{REAL|VIRT}_BEGIN/END - used to open-code the exception
|
|
*
|
|
* EXC_{REAL|VIRT} - standard exception
|
|
*
|
|
* EXC_{REAL|VIRT}_suffix
|
|
* where _suffix is:
|
|
* - _MASKABLE - maskable exception
|
|
* - _OOL - out of line with trampoline to common handler
|
|
* - _HV - HV exception
|
|
*
|
|
* There can be combinations, e.g., EXC_VIRT_OOL_MASKABLE_HV
|
|
*
|
|
* The one unusual case is __EXC_REAL_OOL_HV_DIRECT, which is
|
|
* an OOL vector that branches to a specified handler rather than the usual
|
|
* trampoline that goes to common. It, and other underscore macros, should
|
|
* be used with care.
|
|
*
|
|
* KVM handlers come in the following verieties:
|
|
* TRAMP_KVM
|
|
* TRAMP_KVM_SKIP
|
|
* TRAMP_KVM_HV
|
|
* TRAMP_KVM_HV_SKIP
|
|
*
|
|
* COMMON handlers come in the following verieties:
|
|
* EXC_COMMON_BEGIN/END - used to open-code the handler
|
|
* EXC_COMMON
|
|
* EXC_COMMON_ASYNC
|
|
*
|
|
* TRAMP_REAL and TRAMP_VIRT can be used with BEGIN/END. KVM
|
|
* and OOL handlers are implemented as types of TRAMP and TRAMP_VIRT handlers.
|
|
*/
|
|
|
|
#define EXC_REAL_BEGIN(name, start, size) \
|
|
FIXED_SECTION_ENTRY_BEGIN_LOCATION(real_vectors, exc_real_##start##_##name, start, size)
|
|
|
|
#define EXC_REAL_END(name, start, size) \
|
|
FIXED_SECTION_ENTRY_END_LOCATION(real_vectors, exc_real_##start##_##name, start, size)
|
|
|
|
#define EXC_VIRT_BEGIN(name, start, size) \
|
|
FIXED_SECTION_ENTRY_BEGIN_LOCATION(virt_vectors, exc_virt_##start##_##name, start, size)
|
|
|
|
#define EXC_VIRT_END(name, start, size) \
|
|
FIXED_SECTION_ENTRY_END_LOCATION(virt_vectors, exc_virt_##start##_##name, start, size)
|
|
|
|
#define EXC_COMMON_BEGIN(name) \
|
|
USE_TEXT_SECTION(); \
|
|
.balign IFETCH_ALIGN_BYTES; \
|
|
.global name; \
|
|
_ASM_NOKPROBE_SYMBOL(name); \
|
|
DEFINE_FIXED_SYMBOL(name); \
|
|
name:
|
|
|
|
#define TRAMP_REAL_BEGIN(name) \
|
|
FIXED_SECTION_ENTRY_BEGIN(real_trampolines, name)
|
|
|
|
#define TRAMP_VIRT_BEGIN(name) \
|
|
FIXED_SECTION_ENTRY_BEGIN(virt_trampolines, name)
|
|
|
|
#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
|
|
#define TRAMP_KVM_BEGIN(name) \
|
|
TRAMP_VIRT_BEGIN(name)
|
|
#else
|
|
#define TRAMP_KVM_BEGIN(name)
|
|
#endif
|
|
|
|
#define EXC_REAL_NONE(start, size) \
|
|
FIXED_SECTION_ENTRY_BEGIN_LOCATION(real_vectors, exc_real_##start##_##unused, start, size); \
|
|
FIXED_SECTION_ENTRY_END_LOCATION(real_vectors, exc_real_##start##_##unused, start, size)
|
|
|
|
#define EXC_VIRT_NONE(start, size) \
|
|
FIXED_SECTION_ENTRY_BEGIN_LOCATION(virt_vectors, exc_virt_##start##_##unused, start, size); \
|
|
FIXED_SECTION_ENTRY_END_LOCATION(virt_vectors, exc_virt_##start##_##unused, start, size);
|
|
|
|
|
|
#define EXC_REAL(name, start, size) \
|
|
EXC_REAL_BEGIN(name, start, size); \
|
|
STD_EXCEPTION_PSERIES(start, name##_common); \
|
|
EXC_REAL_END(name, start, size);
|
|
|
|
#define EXC_VIRT(name, start, size, realvec) \
|
|
EXC_VIRT_BEGIN(name, start, size); \
|
|
STD_RELON_EXCEPTION_PSERIES(start, realvec, name##_common); \
|
|
EXC_VIRT_END(name, start, size);
|
|
|
|
#define EXC_REAL_MASKABLE(name, start, size, bitmask) \
|
|
EXC_REAL_BEGIN(name, start, size); \
|
|
MASKABLE_EXCEPTION_PSERIES(start, start, name##_common, bitmask);\
|
|
EXC_REAL_END(name, start, size);
|
|
|
|
#define EXC_VIRT_MASKABLE(name, start, size, realvec, bitmask) \
|
|
EXC_VIRT_BEGIN(name, start, size); \
|
|
MASKABLE_RELON_EXCEPTION_PSERIES(start, realvec, name##_common, bitmask);\
|
|
EXC_VIRT_END(name, start, size);
|
|
|
|
#define EXC_REAL_HV(name, start, size) \
|
|
EXC_REAL_BEGIN(name, start, size); \
|
|
STD_EXCEPTION_HV(start, start, name##_common); \
|
|
EXC_REAL_END(name, start, size);
|
|
|
|
#define EXC_VIRT_HV(name, start, size, realvec) \
|
|
EXC_VIRT_BEGIN(name, start, size); \
|
|
STD_RELON_EXCEPTION_HV(start, realvec, name##_common); \
|
|
EXC_VIRT_END(name, start, size);
|
|
|
|
#define __EXC_REAL_OOL(name, start, size) \
|
|
EXC_REAL_BEGIN(name, start, size); \
|
|
__OOL_EXCEPTION(start, label, tramp_real_##name); \
|
|
EXC_REAL_END(name, start, size);
|
|
|
|
#define __TRAMP_REAL_OOL(name, vec) \
|
|
TRAMP_REAL_BEGIN(tramp_real_##name); \
|
|
STD_EXCEPTION_PSERIES_OOL(vec, name##_common); \
|
|
|
|
#define EXC_REAL_OOL(name, start, size) \
|
|
__EXC_REAL_OOL(name, start, size); \
|
|
__TRAMP_REAL_OOL(name, start);
|
|
|
|
#define __EXC_REAL_OOL_MASKABLE(name, start, size) \
|
|
__EXC_REAL_OOL(name, start, size);
|
|
|
|
#define __TRAMP_REAL_OOL_MASKABLE(name, vec, bitmask) \
|
|
TRAMP_REAL_BEGIN(tramp_real_##name); \
|
|
MASKABLE_EXCEPTION_PSERIES_OOL(vec, name##_common, bitmask); \
|
|
|
|
#define EXC_REAL_OOL_MASKABLE(name, start, size, bitmask) \
|
|
__EXC_REAL_OOL_MASKABLE(name, start, size); \
|
|
__TRAMP_REAL_OOL_MASKABLE(name, start, bitmask);
|
|
|
|
#define __EXC_REAL_OOL_HV_DIRECT(name, start, size, handler) \
|
|
EXC_REAL_BEGIN(name, start, size); \
|
|
__OOL_EXCEPTION(start, label, handler); \
|
|
EXC_REAL_END(name, start, size);
|
|
|
|
#define __EXC_REAL_OOL_HV(name, start, size) \
|
|
__EXC_REAL_OOL(name, start, size);
|
|
|
|
#define __TRAMP_REAL_OOL_HV(name, vec) \
|
|
TRAMP_REAL_BEGIN(tramp_real_##name); \
|
|
STD_EXCEPTION_HV_OOL(vec, name##_common); \
|
|
|
|
#define EXC_REAL_OOL_HV(name, start, size) \
|
|
__EXC_REAL_OOL_HV(name, start, size); \
|
|
__TRAMP_REAL_OOL_HV(name, start);
|
|
|
|
#define __EXC_REAL_OOL_MASKABLE_HV(name, start, size) \
|
|
__EXC_REAL_OOL(name, start, size);
|
|
|
|
#define __TRAMP_REAL_OOL_MASKABLE_HV(name, vec, bitmask) \
|
|
TRAMP_REAL_BEGIN(tramp_real_##name); \
|
|
MASKABLE_EXCEPTION_HV_OOL(vec, name##_common, bitmask); \
|
|
|
|
#define EXC_REAL_OOL_MASKABLE_HV(name, start, size, bitmask) \
|
|
__EXC_REAL_OOL_MASKABLE_HV(name, start, size); \
|
|
__TRAMP_REAL_OOL_MASKABLE_HV(name, start, bitmask);
|
|
|
|
#define __EXC_VIRT_OOL(name, start, size) \
|
|
EXC_VIRT_BEGIN(name, start, size); \
|
|
__OOL_EXCEPTION(start, label, tramp_virt_##name); \
|
|
EXC_VIRT_END(name, start, size);
|
|
|
|
#define __TRAMP_VIRT_OOL(name, realvec) \
|
|
TRAMP_VIRT_BEGIN(tramp_virt_##name); \
|
|
STD_RELON_EXCEPTION_PSERIES_OOL(realvec, name##_common); \
|
|
|
|
#define EXC_VIRT_OOL(name, start, size, realvec) \
|
|
__EXC_VIRT_OOL(name, start, size); \
|
|
__TRAMP_VIRT_OOL(name, realvec);
|
|
|
|
#define __EXC_VIRT_OOL_MASKABLE(name, start, size) \
|
|
__EXC_VIRT_OOL(name, start, size);
|
|
|
|
#define __TRAMP_VIRT_OOL_MASKABLE(name, realvec, bitmask) \
|
|
TRAMP_VIRT_BEGIN(tramp_virt_##name); \
|
|
MASKABLE_RELON_EXCEPTION_PSERIES_OOL(realvec, name##_common, bitmask);\
|
|
|
|
#define EXC_VIRT_OOL_MASKABLE(name, start, size, realvec, bitmask) \
|
|
__EXC_VIRT_OOL_MASKABLE(name, start, size); \
|
|
__TRAMP_VIRT_OOL_MASKABLE(name, realvec, bitmask);
|
|
|
|
#define __EXC_VIRT_OOL_HV(name, start, size) \
|
|
__EXC_VIRT_OOL(name, start, size);
|
|
|
|
#define __TRAMP_VIRT_OOL_HV(name, realvec) \
|
|
TRAMP_VIRT_BEGIN(tramp_virt_##name); \
|
|
STD_RELON_EXCEPTION_HV_OOL(realvec, name##_common); \
|
|
|
|
#define EXC_VIRT_OOL_HV(name, start, size, realvec) \
|
|
__EXC_VIRT_OOL_HV(name, start, size); \
|
|
__TRAMP_VIRT_OOL_HV(name, realvec);
|
|
|
|
#define __EXC_VIRT_OOL_MASKABLE_HV(name, start, size) \
|
|
__EXC_VIRT_OOL(name, start, size);
|
|
|
|
#define __TRAMP_VIRT_OOL_MASKABLE_HV(name, realvec, bitmask) \
|
|
TRAMP_VIRT_BEGIN(tramp_virt_##name); \
|
|
MASKABLE_RELON_EXCEPTION_HV_OOL(realvec, name##_common, bitmask);\
|
|
|
|
#define EXC_VIRT_OOL_MASKABLE_HV(name, start, size, realvec, bitmask) \
|
|
__EXC_VIRT_OOL_MASKABLE_HV(name, start, size); \
|
|
__TRAMP_VIRT_OOL_MASKABLE_HV(name, realvec, bitmask);
|
|
|
|
#define TRAMP_KVM(area, n) \
|
|
TRAMP_KVM_BEGIN(do_kvm_##n); \
|
|
KVM_HANDLER(area, EXC_STD, n); \
|
|
|
|
#define TRAMP_KVM_SKIP(area, n) \
|
|
TRAMP_KVM_BEGIN(do_kvm_##n); \
|
|
KVM_HANDLER_SKIP(area, EXC_STD, n); \
|
|
|
|
/*
|
|
* HV variant exceptions get the 0x2 bit added to their trap number.
|
|
*/
|
|
#define TRAMP_KVM_HV(area, n) \
|
|
TRAMP_KVM_BEGIN(do_kvm_H##n); \
|
|
KVM_HANDLER(area, EXC_HV, n + 0x2); \
|
|
|
|
#define TRAMP_KVM_HV_SKIP(area, n) \
|
|
TRAMP_KVM_BEGIN(do_kvm_H##n); \
|
|
KVM_HANDLER_SKIP(area, EXC_HV, n + 0x2); \
|
|
|
|
#define EXC_COMMON(name, realvec, hdlr) \
|
|
EXC_COMMON_BEGIN(name); \
|
|
STD_EXCEPTION_COMMON(realvec, name, hdlr); \
|
|
|
|
#define EXC_COMMON_ASYNC(name, realvec, hdlr) \
|
|
EXC_COMMON_BEGIN(name); \
|
|
STD_EXCEPTION_COMMON_ASYNC(realvec, name, hdlr); \
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
|
|
#endif /* _ASM_POWERPC_HEAD_64_H */
|