File 0195-sm501-Add-some-more-unimplemented-r.patch of Package qemu-testsuite.20749
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 7f1822421a9c95e1dfd7e7272ba1..248b8be617d4be7fe8f439c1f814 100644
--- a/hw/display/sm501.c
+++ b/hw/display/sm501.c
@@ -795,6 +795,8 @@ static uint64_t sm501_system_config_read(void *opaque, hwaddr addr,
case SM501_ARBTRTN_CONTROL:
ret = s->arbitration_control;
break;
+ case SM501_COMMAND_LIST_STATUS:
+ ret = 0x00180002; /* FIFOs are empty, everything idle */
case SM501_IRQ_MASK:
ret = s->irq_mask;
break;
@@ -812,6 +814,9 @@ 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."
@@ -865,6 +870,12 @@ 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."
@@ -924,6 +935,9 @@ 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;
@@ -1022,6 +1036,9 @@ 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;