File 0352-sm501-Add-some-more-unimplemented-r.patch of Package qemu.19799

From: BALATON Zoltan <balaton@eik.bme.hu>
Date: Sat, 16 Dec 2017 23:57:46 +0100
Subject: sm501: Add some more unimplemented registers

Git-commit: 5690d9ecefb946100a4974d57ae03bc5ee11775a
References: bsc#1172385, CVE-2020-12829

These are not really implemented (just return zero or default values)
but add these so guests accessing them can run.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Bruce Rogers <brogers@suse.com>
---
 hw/display/sm501.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/hw/display/sm501.c b/hw/display/sm501.c
index 0857ae3997b437baeb4a3bb8b604..8a83942a08e6f218da67da250397 100644
--- a/hw/display/sm501.c
+++ b/hw/display/sm501.c
@@ -776,6 +776,8 @@ static uint64_t sm501_system_config_read(void *opaque, hwaddr addr,
     case SM501_DRAM_CONTROL:
 	ret = (s->dram_control & 0x07F107C0) | s->local_mem_size_index << 13;
 	break;
+    case SM501_COMMAND_LIST_STATUS:
+        ret = 0x00180002; /* FIFOs are empty, everything idle */
     case SM501_IRQ_MASK:
 	ret = s->irq_mask;
 	break;
@@ -793,6 +795,9 @@ static uint64_t sm501_system_config_read(void *opaque, hwaddr addr,
     case SM501_POWER_MODE_CONTROL:
 	ret = s->power_mode_control;
 	break;
+    case SM501_ENDIAN_CONTROL:
+        ret = 0; /* Only default little endian mode is supported */
+        break;
 
     default:
 	printf("sm501 system config : not implemented register read."
@@ -843,6 +848,12 @@ static void sm501_system_config_write(void *opaque, hwaddr addr,
     case SM501_POWER_MODE_CONTROL:
 	s->power_mode_control = value & 0x00000003;
 	break;
+    case SM501_ENDIAN_CONTROL:
+        if (value & 0x00000001) {
+            printf("sm501 system config : big endian mode not implemented.\n");
+            abort();
+        }
+        break;
 
     default:
 	printf("sm501 system config : not implemented register write."
@@ -902,6 +913,9 @@ static uint64_t sm501_disp_ctrl_read(void *opaque, hwaddr addr,
     case SM501_DC_PANEL_PANNING_CONTROL:
 	ret = s->dc_panel_panning_control;
 	break;
+    case SM501_DC_PANEL_COLOR_KEY:
+        /* Not implemented yet */
+        break;
     case SM501_DC_PANEL_FB_ADDR:
 	ret = s->dc_panel_fb_addr;
 	break;
@@ -996,6 +1010,9 @@ static void sm501_disp_ctrl_write(void *opaque, hwaddr addr,
     case SM501_DC_PANEL_PANNING_CONTROL:
 	s->dc_panel_panning_control = value & 0xFF3FFF3F;
 	break;
+    case SM501_DC_PANEL_COLOR_KEY:
+        /* Not implemented yet */
+        break;
     case SM501_DC_PANEL_FB_ADDR:
 	s->dc_panel_fb_addr = value & 0x8FFFFFF0;
 	break;