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-rw-r--r--arch/arm64/mm/trans_pgd-asm.S65
1 files changed, 65 insertions, 0 deletions
diff --git a/arch/arm64/mm/trans_pgd-asm.S b/arch/arm64/mm/trans_pgd-asm.S
new file mode 100644
index 000000000..021c31573
--- /dev/null
+++ b/arch/arm64/mm/trans_pgd-asm.S
@@ -0,0 +1,65 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/*
+ * Copyright (c) 2021, Microsoft Corporation.
+ * Pasha Tatashin <pasha.tatashin@soleen.com>
+ */
+
+#include <linux/linkage.h>
+#include <asm/assembler.h>
+#include <asm/kvm_asm.h>
+
+.macro invalid_vector label
+SYM_CODE_START_LOCAL(\label)
+ .align 7
+ b \label
+SYM_CODE_END(\label)
+.endm
+
+.macro el1_sync_vector
+SYM_CODE_START_LOCAL(el1_sync)
+ .align 7
+ cmp x0, #HVC_SET_VECTORS /* Called from hibernate */
+ b.ne 1f
+ msr vbar_el2, x1
+ mov x0, xzr
+ eret
+1: cmp x0, #HVC_SOFT_RESTART /* Called from kexec */
+ b.ne 2f
+ mov x0, x2
+ mov x2, x4
+ mov x4, x1
+ mov x1, x3
+ br x4
+2: /* Unexpected argument, set an error */
+ mov_q x0, HVC_STUB_ERR
+ eret
+SYM_CODE_END(el1_sync)
+.endm
+
+SYM_CODE_START(trans_pgd_stub_vectors)
+ invalid_vector hyp_stub_el2t_sync_invalid // Synchronous EL2t
+ invalid_vector hyp_stub_el2t_irq_invalid // IRQ EL2t
+ invalid_vector hyp_stub_el2t_fiq_invalid // FIQ EL2t
+ invalid_vector hyp_stub_el2t_error_invalid // Error EL2t
+
+ invalid_vector hyp_stub_el2h_sync_invalid // Synchronous EL2h
+ invalid_vector hyp_stub_el2h_irq_invalid // IRQ EL2h
+ invalid_vector hyp_stub_el2h_fiq_invalid // FIQ EL2h
+ invalid_vector hyp_stub_el2h_error_invalid // Error EL2h
+
+ el1_sync_vector // Synchronous 64-bit EL1
+ invalid_vector hyp_stub_el1_irq_invalid // IRQ 64-bit EL1
+ invalid_vector hyp_stub_el1_fiq_invalid // FIQ 64-bit EL1
+ invalid_vector hyp_stub_el1_error_invalid // Error 64-bit EL1
+
+ invalid_vector hyp_stub_32b_el1_sync_invalid // Synchronous 32-bit EL1
+ invalid_vector hyp_stub_32b_el1_irq_invalid // IRQ 32-bit EL1
+ invalid_vector hyp_stub_32b_el1_fiq_invalid // FIQ 32-bit EL1
+ invalid_vector hyp_stub_32b_el1_error_invalid // Error 32-bit EL1
+ .align 11
+SYM_INNER_LABEL(__trans_pgd_stub_vectors_end, SYM_L_LOCAL)
+SYM_CODE_END(trans_pgd_stub_vectors)
+
+# Check the trans_pgd_stub_vectors didn't overflow
+.org . - (__trans_pgd_stub_vectors_end - trans_pgd_stub_vectors) + SZ_2K