On 09/02/21 17:46, Supriya Mane wrote:
Setting 'CONFIG_DEVMEM=y' provides access to /dev/mem.
Fixes "cannot access '/dev/mem' : No such file or directory"

Signed-off-by: Supriya Mane <sm.supr...@globaledgesoft.com>
---
  target/linux/x86/64/config-5.4 | 1 +
  1 file changed, 1 insertion(+)

diff --git a/target/linux/x86/64/config-5.4 b/target/linux/x86/64/config-5.4
index f09deca5b0..a483d6ea2a 100644
--- a/target/linux/x86/64/config-5.4
+++ b/target/linux/x86/64/config-5.4
@@ -115,6 +115,7 @@ CONFIG_CRYPTO_SIMD=y
  # CONFIG_CRYPTO_TWOFISH_X86_64_3WAY is not set
  CONFIG_CRYPTO_XTS=y
  # CONFIG_DEBUG_HOTPLUG_CPU0 is not set
+CONFIG_DEVMEM=y
  CONFIG_DMA_ACPI=y
  CONFIG_DMA_SHARED_BUFFER=y
  # CONFIG_DPTF_POWER is not set


It's disabled by default because it is a debugging feature that is not terribly secure (lets anyone see the RAM contents, to an extent).

I'm not sure this should be enabled for all x86_64 target like that.

-Alberto

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