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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/arm64/mm/trans_pgd-asm.S
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/* SPDX-License-Identifier: GPL-2.0-only */

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/*

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 * Copyright (c) 2021, Microsoft Corporation.

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 * Pasha Tatashin <[email protected]>

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 */

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#include <linux/linkage.h>

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#include <asm/assembler.h>

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#include <asm/kvm_asm.h>

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.macro invalid_vector	label

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SYM_CODE_START_LOCAL(\label)

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	.align 7

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	b	\label

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SYM_CODE_END(\label)

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.endm

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.macro el1_sync_vector

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SYM_CODE_START_LOCAL(el1_sync)

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	.align 7

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	cmp	x0, #HVC_SET_VECTORS	/* Called from hibernate */

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	b.ne	1f

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	msr	vbar_el2, x1

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	mov	x0, xzr

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	eret

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1:	cmp	x0, #HVC_SOFT_RESTART	/* Called from kexec */

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	b.ne	2f

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	mov	x0, x2

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	mov	x2, x4

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	mov	x4, x1

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	mov	x1, x3

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	br	x4

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2:	/* Unexpected argument, set an error */

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	mov_q	x0, HVC_STUB_ERR

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	eret

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SYM_CODE_END(el1_sync)

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.endm

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SYM_CODE_START(trans_pgd_stub_vectors)

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	invalid_vector	hyp_stub_el2t_sync_invalid	// Synchronous EL2t

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	invalid_vector	hyp_stub_el2t_irq_invalid	// IRQ EL2t

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	invalid_vector	hyp_stub_el2t_fiq_invalid	// FIQ EL2t

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	invalid_vector	hyp_stub_el2t_error_invalid	// Error EL2t

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	invalid_vector	hyp_stub_el2h_sync_invalid	// Synchronous EL2h

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	invalid_vector	hyp_stub_el2h_irq_invalid	// IRQ EL2h

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	invalid_vector	hyp_stub_el2h_fiq_invalid	// FIQ EL2h

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	invalid_vector	hyp_stub_el2h_error_invalid	// Error EL2h

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	el1_sync_vector					// Synchronous 64-bit EL1

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	invalid_vector	hyp_stub_el1_irq_invalid	// IRQ 64-bit EL1

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	invalid_vector	hyp_stub_el1_fiq_invalid	// FIQ 64-bit EL1

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	invalid_vector	hyp_stub_el1_error_invalid	// Error 64-bit EL1

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	invalid_vector	hyp_stub_32b_el1_sync_invalid	// Synchronous 32-bit EL1

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	invalid_vector	hyp_stub_32b_el1_irq_invalid	// IRQ 32-bit EL1

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	invalid_vector	hyp_stub_32b_el1_fiq_invalid	// FIQ 32-bit EL1

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	invalid_vector	hyp_stub_32b_el1_error_invalid	// Error 32-bit EL1

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	.align 11

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SYM_INNER_LABEL(__trans_pgd_stub_vectors_end, SYM_L_LOCAL)

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SYM_CODE_END(trans_pgd_stub_vectors)

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# Check the trans_pgd_stub_vectors didn't overflow

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.org . - (__trans_pgd_stub_vectors_end - trans_pgd_stub_vectors) + SZ_2K

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