[PATCH v6 07/11] target/arm: Restrict ARMv7 M-profile cpus to TCG accel

[Philippe Mathieu-Daudé]

KVM requires the target cpu to be at least ARMv8 architecture
(support on ARMv7 has been dropped in commit 82bf7ae84ce:
"target/arm: Remove KVM support for 32-bit Arm hosts").

Beside, KVM only supports A-profile, thus won't be able to run
M-profile cpus.

Only enable the following ARMv7 M-Profile CPUs when TCG is available:

  - Cortex-M0
  - Cortex-M3
  - Cortex-M4
  - Cortex-M33

The following machines are no more built when TCG is disabled:

  - emcraft-sf2          SmartFusion2 SOM kit from Emcraft (M2S010)
  - highbank             Calxeda Highbank (ECX-1000)
  - lm3s6965evb          Stellaris LM3S6965EVB (Cortex-M3)
  - lm3s811evb           Stellaris LM3S811EVB (Cortex-M3)
  - midway               Calxeda Midway (ECX-2000)
  - mps2-an385           ARM MPS2 with AN385 FPGA image for Cortex-M3
  - mps2-an386           ARM MPS2 with AN386 FPGA image for Cortex-M4
  - mps2-an500           ARM MPS2 with AN500 FPGA image for Cortex-M7
  - mps2-an505           ARM MPS2 with AN505 FPGA image for Cortex-M33
  - mps2-an511           ARM MPS2 with AN511 DesignStart FPGA image for 
Cortex-M3
  - mps2-an521           ARM MPS2 with AN521 FPGA image for dual Cortex-M33
  - musca-a              ARM Musca-A board (dual Cortex-M33)
  - musca-b1             ARM Musca-B1 board (dual Cortex-M33)
  - netduino2            Netduino 2 Machine (Cortex-M3)
  - netduinoplus2        Netduino Plus 2 Machine(Cortex-M4)

We don't need to enforce CONFIG_ARM_V7M in default-configs anymore.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 default-configs/devices/arm-softmmu.mak | 11 -----------
 hw/arm/Kconfig                          |  7 +++++++
 target/arm/Kconfig                      |  1 +
 3 files changed, 8 insertions(+), 11 deletions(-)

diff --git a/default-configs/devices/arm-softmmu.mak 
b/default-configs/devices/arm-softmmu.mak
index 175530595ce..0fc80d7d6df 100644
--- a/default-configs/devices/arm-softmmu.mak
+++ b/default-configs/devices/arm-softmmu.mak
@@ -1,28 +1,17 @@
 # Default configuration for arm-softmmu
 
-# TODO: ARM_V7M is currently always required - make this more flexible!
-CONFIG_ARM_V7M=y
-
 # CONFIG_PCI_DEVICES=n
 # CONFIG_TEST_DEVICES=n
 
 CONFIG_ARM_VIRT=y
 CONFIG_CUBIEBOARD=y
 CONFIG_EXYNOS4=y
-CONFIG_HIGHBANK=y
-CONFIG_MUSCA=y
-CONFIG_STELLARIS=y
 CONFIG_REALVIEW=y
 CONFIG_VEXPRESS=y
 CONFIG_ZYNQ=y
 CONFIG_NPCM7XX=y
-CONFIG_NETDUINO2=y
-CONFIG_NETDUINOPLUS2=y
-CONFIG_MPS2=y
 CONFIG_RASPI=y
 CONFIG_SABRELITE=y
-CONFIG_EMCRAFT_SF2=y
-CONFIG_MICROBIT=y
 CONFIG_FSL_IMX7=y
 CONFIG_FSL_IMX6UL=y
 CONFIG_ALLWINNER_H3=y
diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
index 4baf1f97694..62f8b0d24e7 100644
--- a/hw/arm/Kconfig
+++ b/hw/arm/Kconfig
@@ -60,6 +60,7 @@ config EXYNOS4
 
 config HIGHBANK
     bool
+    default y if TCG && ARM
     select A9MPCORE
     select A15MPCORE
     select AHCI
@@ -95,6 +96,7 @@ config MAINSTONE
 
 config MUSCA
     bool
+    default y if TCG && ARM
     select ARMSSE
     select PL011
     select PL031
@@ -115,10 +117,12 @@ config MUSICPAL
 
 config NETDUINO2
     bool
+    default y if TCG && ARM
     select STM32F205_SOC
 
 config NETDUINOPLUS2
     bool
+    default y if TCG && ARM
     select STM32F405_SOC
 
 config NSERIES
@@ -240,6 +244,7 @@ config SABRELITE
 
 config STELLARIS
     bool
+    default y if TCG && ARM
     select ARM_V7M
     select CMSDK_APB_WATCHDOG
     select I2C
@@ -443,6 +448,7 @@ config ASPEED_SOC
 
 config MPS2
     bool
+    default y if TCG && ARM
     select ARMSSE
     select LAN9118
     select MPS2_FPGAIO
@@ -496,6 +502,7 @@ config NRF51_SOC
 
 config EMCRAFT_SF2
     bool
+    default y if TCG && ARM
     select MSF2
     select SSI_M25P80
 
diff --git a/target/arm/Kconfig b/target/arm/Kconfig
index 4dc96c46520..07a2fad7a2b 100644
--- a/target/arm/Kconfig
+++ b/target/arm/Kconfig
@@ -24,4 +24,5 @@ config ARM_V7R
 
 config ARM_V7M
     bool
+    depends on TCG && ARM
     select PTIMER
-- 
2.26.2