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[v3,32/35] efi: Allow easy selection of serial-only operation

Message ID 20211025213041.v3.32.I8927cdce4b36339b962ef31074500198fcc3be1c@changeid
State Superseded
Delegated to: Heinrich Schuchardt
Headers show
Series efi: Improvements to U-Boot running on top of UEFI | expand

Commit Message

Simon Glass Oct. 26, 2021, 3:30 a.m. UTC 
Add info about how to select vidconsole or serial.

Also set up a demo boot command.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

(no changes since v2)

Changes in v2:
- Add a better boot command too

 include/configs/efi-x86_app.h | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)
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Patch

diff --git a/include/configs/efi-x86_app.h b/include/configs/efi-x86_app.h
index 6061a6db0a4..33afb7ca0f9 100644
--- a/include/configs/efi-x86_app.h
+++ b/include/configs/efi-x86_app.h
@@ -10,8 +10,33 @@ 
 
 #undef CONFIG_TPM_TIS_BASE_ADDRESS
 
+/*
+ * Select the output device: Put an 'x' prefix before one of these to disable it
+ */
+
+/*
+ * Video output - can normally continue after exit_boot_services has been
+ * called, since output to the display does not require EFI services at that
+ * point. U-Boot sets up the console memory and does its own drawing.
+ */
 #define CONFIG_STD_DEVICES_SETTINGS	"stdin=serial\0" \
 					"stdout=vidconsole\0" \
 					"stderr=vidconsole\0"
 
+/*
+ * Serial output with no console. Run qemu with:
+ *
+ *    -display none -serial mon:stdio
+ *
+ * This will hang or fail to output on the console after exit_boot_services is
+ * called.
+ */
+#define xCONFIG_STD_DEVICES_SETTINGS	"stdin=serial\0" \
+					"stdout=serial\0" \
+					"stderr=serial\0"
+
+#undef CONFIG_BOOTCOMMAND
+
+#define CONFIG_BOOTCOMMAND "part list efi 0; fatls efi 0:1"
+
 #endif