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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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2874c5fd28
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
336 lines
6.3 KiB
ArmAsm
336 lines
6.3 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* This file contains the generic code to perform a call to the
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* pSeries LPAR hypervisor.
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*/
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#include <linux/jump_label.h>
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#include <asm/hvcall.h>
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#include <asm/processor.h>
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#include <asm/ppc_asm.h>
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#include <asm/asm-offsets.h>
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#include <asm/ptrace.h>
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#include <asm/feature-fixups.h>
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.section ".text"
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#ifdef CONFIG_TRACEPOINTS
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#ifndef CONFIG_JUMP_LABEL
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.section ".toc","aw"
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.globl hcall_tracepoint_refcount
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hcall_tracepoint_refcount:
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.8byte 0
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.section ".text"
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#endif
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/*
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* precall must preserve all registers. use unused STK_PARAM()
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* areas to save snapshots and opcode.
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*/
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#define HCALL_INST_PRECALL(FIRST_REG) \
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mflr r0; \
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std r3,STK_PARAM(R3)(r1); \
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std r4,STK_PARAM(R4)(r1); \
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std r5,STK_PARAM(R5)(r1); \
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std r6,STK_PARAM(R6)(r1); \
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std r7,STK_PARAM(R7)(r1); \
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std r8,STK_PARAM(R8)(r1); \
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std r9,STK_PARAM(R9)(r1); \
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std r10,STK_PARAM(R10)(r1); \
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std r0,16(r1); \
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addi r4,r1,STK_PARAM(FIRST_REG); \
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stdu r1,-STACK_FRAME_OVERHEAD(r1); \
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bl __trace_hcall_entry; \
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ld r3,STACK_FRAME_OVERHEAD+STK_PARAM(R3)(r1); \
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ld r4,STACK_FRAME_OVERHEAD+STK_PARAM(R4)(r1); \
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ld r5,STACK_FRAME_OVERHEAD+STK_PARAM(R5)(r1); \
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ld r6,STACK_FRAME_OVERHEAD+STK_PARAM(R6)(r1); \
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ld r7,STACK_FRAME_OVERHEAD+STK_PARAM(R7)(r1); \
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ld r8,STACK_FRAME_OVERHEAD+STK_PARAM(R8)(r1); \
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ld r9,STACK_FRAME_OVERHEAD+STK_PARAM(R9)(r1); \
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ld r10,STACK_FRAME_OVERHEAD+STK_PARAM(R10)(r1)
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/*
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* postcall is performed immediately before function return which
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* allows liberal use of volatile registers.
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*/
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#define __HCALL_INST_POSTCALL \
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ld r0,STACK_FRAME_OVERHEAD+STK_PARAM(R3)(r1); \
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std r3,STACK_FRAME_OVERHEAD+STK_PARAM(R3)(r1); \
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mr r4,r3; \
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mr r3,r0; \
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bl __trace_hcall_exit; \
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ld r0,STACK_FRAME_OVERHEAD+16(r1); \
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addi r1,r1,STACK_FRAME_OVERHEAD; \
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ld r3,STK_PARAM(R3)(r1); \
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mtlr r0
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#define HCALL_INST_POSTCALL_NORETS \
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li r5,0; \
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__HCALL_INST_POSTCALL
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#define HCALL_INST_POSTCALL(BUFREG) \
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mr r5,BUFREG; \
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__HCALL_INST_POSTCALL
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#ifdef CONFIG_JUMP_LABEL
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#define HCALL_BRANCH(LABEL) \
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ARCH_STATIC_BRANCH(LABEL, hcall_tracepoint_key)
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#else
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/*
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* We branch around this in early init (eg when populating the MMU
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* hashtable) by using an unconditional cpu feature.
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*/
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#define HCALL_BRANCH(LABEL) \
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BEGIN_FTR_SECTION; \
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b 1f; \
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END_FTR_SECTION(0, 1); \
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ld r12,hcall_tracepoint_refcount@toc(r2); \
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std r12,32(r1); \
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cmpdi r12,0; \
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bne- LABEL; \
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1:
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#endif
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#else
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#define HCALL_INST_PRECALL(FIRST_ARG)
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#define HCALL_INST_POSTCALL_NORETS
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#define HCALL_INST_POSTCALL(BUFREG)
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#define HCALL_BRANCH(LABEL)
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#endif
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_GLOBAL_TOC(plpar_hcall_norets)
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HMT_MEDIUM
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mfcr r0
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stw r0,8(r1)
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HCALL_BRANCH(plpar_hcall_norets_trace)
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HVSC /* invoke the hypervisor */
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lwz r0,8(r1)
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mtcrf 0xff,r0
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blr /* return r3 = status */
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#ifdef CONFIG_TRACEPOINTS
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plpar_hcall_norets_trace:
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HCALL_INST_PRECALL(R4)
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HVSC
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HCALL_INST_POSTCALL_NORETS
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lwz r0,8(r1)
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mtcrf 0xff,r0
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blr
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#endif
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_GLOBAL_TOC(plpar_hcall)
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HMT_MEDIUM
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mfcr r0
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stw r0,8(r1)
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HCALL_BRANCH(plpar_hcall_trace)
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std r4,STK_PARAM(R4)(r1) /* Save ret buffer */
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mr r4,r5
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mr r5,r6
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mr r6,r7
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mr r7,r8
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mr r8,r9
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mr r9,r10
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HVSC /* invoke the hypervisor */
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ld r12,STK_PARAM(R4)(r1)
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std r4, 0(r12)
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std r5, 8(r12)
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std r6, 16(r12)
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std r7, 24(r12)
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lwz r0,8(r1)
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mtcrf 0xff,r0
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blr /* return r3 = status */
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#ifdef CONFIG_TRACEPOINTS
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plpar_hcall_trace:
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HCALL_INST_PRECALL(R5)
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std r4,STK_PARAM(R4)(r1)
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mr r0,r4
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mr r4,r5
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mr r5,r6
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mr r6,r7
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mr r7,r8
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mr r8,r9
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mr r9,r10
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HVSC
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ld r12,STK_PARAM(R4)(r1)
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std r4,0(r12)
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std r5,8(r12)
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std r6,16(r12)
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std r7,24(r12)
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HCALL_INST_POSTCALL(r12)
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lwz r0,8(r1)
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mtcrf 0xff,r0
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blr
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#endif
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/*
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* plpar_hcall_raw can be called in real mode. kexec/kdump need some
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* hypervisor calls to be executed in real mode. So plpar_hcall_raw
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* does not access the per cpu hypervisor call statistics variables,
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* since these variables may not be present in the RMO region.
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*/
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_GLOBAL(plpar_hcall_raw)
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HMT_MEDIUM
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mfcr r0
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stw r0,8(r1)
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std r4,STK_PARAM(R4)(r1) /* Save ret buffer */
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mr r4,r5
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mr r5,r6
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mr r6,r7
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mr r7,r8
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mr r8,r9
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mr r9,r10
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HVSC /* invoke the hypervisor */
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ld r12,STK_PARAM(R4)(r1)
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std r4, 0(r12)
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std r5, 8(r12)
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std r6, 16(r12)
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std r7, 24(r12)
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lwz r0,8(r1)
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mtcrf 0xff,r0
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blr /* return r3 = status */
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_GLOBAL_TOC(plpar_hcall9)
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HMT_MEDIUM
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mfcr r0
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stw r0,8(r1)
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HCALL_BRANCH(plpar_hcall9_trace)
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std r4,STK_PARAM(R4)(r1) /* Save ret buffer */
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mr r4,r5
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mr r5,r6
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mr r6,r7
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mr r7,r8
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mr r8,r9
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mr r9,r10
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ld r10,STK_PARAM(R11)(r1) /* put arg7 in R10 */
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ld r11,STK_PARAM(R12)(r1) /* put arg8 in R11 */
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ld r12,STK_PARAM(R13)(r1) /* put arg9 in R12 */
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HVSC /* invoke the hypervisor */
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mr r0,r12
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ld r12,STK_PARAM(R4)(r1)
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std r4, 0(r12)
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std r5, 8(r12)
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std r6, 16(r12)
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std r7, 24(r12)
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std r8, 32(r12)
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std r9, 40(r12)
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std r10,48(r12)
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std r11,56(r12)
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std r0, 64(r12)
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lwz r0,8(r1)
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mtcrf 0xff,r0
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blr /* return r3 = status */
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#ifdef CONFIG_TRACEPOINTS
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plpar_hcall9_trace:
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HCALL_INST_PRECALL(R5)
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std r4,STK_PARAM(R4)(r1)
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mr r0,r4
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mr r4,r5
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mr r5,r6
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mr r6,r7
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mr r7,r8
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mr r8,r9
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mr r9,r10
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ld r10,STACK_FRAME_OVERHEAD+STK_PARAM(R11)(r1)
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ld r11,STACK_FRAME_OVERHEAD+STK_PARAM(R12)(r1)
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ld r12,STACK_FRAME_OVERHEAD+STK_PARAM(R13)(r1)
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HVSC
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mr r0,r12
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ld r12,STACK_FRAME_OVERHEAD+STK_PARAM(R4)(r1)
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std r4,0(r12)
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std r5,8(r12)
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std r6,16(r12)
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std r7,24(r12)
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std r8,32(r12)
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std r9,40(r12)
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std r10,48(r12)
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std r11,56(r12)
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std r0,64(r12)
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HCALL_INST_POSTCALL(r12)
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lwz r0,8(r1)
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mtcrf 0xff,r0
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blr
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#endif
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/* See plpar_hcall_raw to see why this is needed */
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_GLOBAL(plpar_hcall9_raw)
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HMT_MEDIUM
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mfcr r0
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stw r0,8(r1)
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std r4,STK_PARAM(R4)(r1) /* Save ret buffer */
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mr r4,r5
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mr r5,r6
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mr r6,r7
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mr r7,r8
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mr r8,r9
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mr r9,r10
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ld r10,STK_PARAM(R11)(r1) /* put arg7 in R10 */
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ld r11,STK_PARAM(R12)(r1) /* put arg8 in R11 */
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ld r12,STK_PARAM(R13)(r1) /* put arg9 in R12 */
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HVSC /* invoke the hypervisor */
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mr r0,r12
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ld r12,STK_PARAM(R4)(r1)
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std r4, 0(r12)
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std r5, 8(r12)
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std r6, 16(r12)
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std r7, 24(r12)
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std r8, 32(r12)
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std r9, 40(r12)
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std r10,48(r12)
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std r11,56(r12)
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std r0, 64(r12)
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lwz r0,8(r1)
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mtcrf 0xff,r0
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blr /* return r3 = status */
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