From: Andrew Jones <drjones@redhat.com>
To: kvm@vger.kernel.org
Cc: alexandru.elisei@arm.com, nikos.nikoleris@arm.com,
andre.przywara@arm.com, eric.auger@redhat.com
Subject: [PATCH kvm-unit-tests v2 1/8] arm/arm64: Reorganize cstart assembler
Date: Tue, 20 Apr 2021 20:59:55 +0200 [thread overview]
Message-ID: <20210420190002.383444-2-drjones@redhat.com> (raw)
In-Reply-To: <20210420190002.383444-1-drjones@redhat.com>
Move secondary_entry helper functions out of .init and into .text,
since secondary_entry isn't run at at "init" time. Actually, anything
that is used after init time should be in .text, as we may not include
.init in some build configurations.
Reviewed-by Nikos Nikoleris <nikos.nikoleris@arm.com>
Signed-off-by: Andrew Jones <drjones@redhat.com>
---
arm/cstart.S | 66 +++++++++++++++++++++++++++++---------------------
arm/cstart64.S | 18 ++++++++------
2 files changed, 49 insertions(+), 35 deletions(-)
diff --git a/arm/cstart.S b/arm/cstart.S
index d88a98362940..b2c0ba061cd5 100644
--- a/arm/cstart.S
+++ b/arm/cstart.S
@@ -96,32 +96,7 @@ start:
bl exit
b halt
-
-.macro set_mode_stack mode, stack
- add \stack, #S_FRAME_SIZE
- msr cpsr_c, #(\mode | PSR_I_BIT | PSR_F_BIT)
- isb
- mov sp, \stack
-.endm
-
-exceptions_init:
- mrc p15, 0, r2, c1, c0, 0 @ read SCTLR
- bic r2, #CR_V @ SCTLR.V := 0
- mcr p15, 0, r2, c1, c0, 0 @ write SCTLR
- ldr r2, =vector_table
- mcr p15, 0, r2, c12, c0, 0 @ write VBAR
-
- mrs r2, cpsr
-
- /* first frame reserved for svc mode */
- set_mode_stack UND_MODE, r0
- set_mode_stack ABT_MODE, r0
- set_mode_stack IRQ_MODE, r0
- set_mode_stack FIQ_MODE, r0
-
- msr cpsr_cxsf, r2 @ back to svc mode
- isb
- mov pc, lr
+.text
enable_vfp:
/* Enable full access to CP10 and CP11: */
@@ -133,8 +108,6 @@ enable_vfp:
vmsr fpexc, r0
mov pc, lr
-.text
-
.global get_mmu_off
get_mmu_off:
ldr r0, =auxinfo
@@ -235,6 +208,43 @@ asm_mmu_disable:
mov pc, lr
+/*
+ * Vectors
+ */
+
+.macro set_mode_stack mode, stack
+ add \stack, #S_FRAME_SIZE
+ msr cpsr_c, #(\mode | PSR_I_BIT | PSR_F_BIT)
+ isb
+ mov sp, \stack
+.endm
+
+/*
+ * exceptions_init
+ *
+ * Input r0 is the stack top, which is the exception stacks base
+ */
+exceptions_init:
+ mrc p15, 0, r2, c1, c0, 0 @ read SCTLR
+ bic r2, #CR_V @ SCTLR.V := 0
+ mcr p15, 0, r2, c1, c0, 0 @ write SCTLR
+ ldr r2, =vector_table
+ mcr p15, 0, r2, c12, c0, 0 @ write VBAR
+
+ mrs r2, cpsr
+
+ /*
+ * The first frame is reserved for svc mode
+ */
+ set_mode_stack UND_MODE, r0
+ set_mode_stack ABT_MODE, r0
+ set_mode_stack IRQ_MODE, r0
+ set_mode_stack FIQ_MODE, r0
+
+ msr cpsr_cxsf, r2 @ back to svc mode
+ isb
+ mov pc, lr
+
/*
* Vector stubs
* Simplified version of the Linux kernel implementation
diff --git a/arm/cstart64.S b/arm/cstart64.S
index 0a85338bcdae..7963e1fea979 100644
--- a/arm/cstart64.S
+++ b/arm/cstart64.S
@@ -109,13 +109,6 @@ start:
bl exit
b halt
-exceptions_init:
- adrp x4, vector_table
- add x4, x4, :lo12:vector_table
- msr vbar_el1, x4
- isb
- ret
-
.text
.globl get_mmu_off
@@ -251,6 +244,17 @@ asm_mmu_disable:
/*
* Vectors
+ */
+
+exceptions_init:
+ adrp x4, vector_table
+ add x4, x4, :lo12:vector_table
+ msr vbar_el1, x4
+ isb
+ ret
+
+/*
+ * Vector stubs
* Adapted from arch/arm64/kernel/entry.S
*/
.macro vector_stub, name, vec
--
2.30.2
next prev parent reply other threads:[~2021-04-20 19:00 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-20 18:59 [PATCH kvm-unit-tests v2 0/8] arm/arm64: Prepare for target-efi Andrew Jones
2021-04-20 18:59 ` Andrew Jones [this message]
2021-04-22 15:37 ` [PATCH kvm-unit-tests v2 1/8] arm/arm64: Reorganize cstart assembler Alexandru Elisei
2021-04-20 18:59 ` [PATCH kvm-unit-tests v2 2/8] arm/arm64: Move setup_vm into setup Andrew Jones
2021-04-20 18:59 ` [PATCH kvm-unit-tests v2 3/8] pci-testdev: ioremap regions Andrew Jones
2021-04-26 15:03 ` Andre Przywara
2021-04-26 16:25 ` Andrew Jones
2021-04-20 18:59 ` [PATCH kvm-unit-tests v2 4/8] arm/arm64: mmu: Stop mapping an assumed IO region Andrew Jones
2021-04-23 16:10 ` Alexandru Elisei
2021-04-26 9:13 ` Andrew Jones
2021-04-20 18:59 ` [PATCH kvm-unit-tests v2 5/8] arm/arm64: mmu: Remove memory layout assumptions Andrew Jones
2021-04-23 16:31 ` Alexandru Elisei
2021-04-20 19:00 ` [PATCH kvm-unit-tests v2 6/8] arm/arm64: setup: Consolidate " Andrew Jones
2021-04-21 6:40 ` Andrew Jones
2021-04-22 16:12 ` Andrew Jones
2021-04-25 10:35 ` Alexandru Elisei
2021-04-25 10:35 ` Alexandru Elisei
2021-04-26 9:18 ` Andrew Jones
2021-04-20 19:00 ` [PATCH kvm-unit-tests v2 7/8] chr-testdev: Silently fail init Andrew Jones
2021-04-20 19:00 ` [PATCH kvm-unit-tests v2 8/8] arm/arm64: psci: don't assume method is hvc Andrew Jones
2021-04-21 7:02 ` Andrew Jones
2021-04-22 16:17 ` Andrew Jones
2021-04-26 14:57 ` Alexandru Elisei
2021-04-26 16:35 ` Andrew Jones
2021-04-27 15:47 ` Alexandru Elisei
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