On Sat, 2026-08-08 at 14:22 +0800, Tao Ding wrote:
> Hi all,
>
> This patch series adds GSDMA and Decomp_gzip to the K230 board.
> Enable k230 to use k230_unzip to decompress files during the u-boot
> phase.
>
> This series includes the following features:
>
> *patch1: add K230 gsdma which supports sdma, gdma is temporarily not
> supported
> *patch2: add gsdma to K230 board
> *patch3: add K230 gsdma qtest
> *patch4: add K230 decomp_gzip which decompress data work with sdma
> *patch5: add decomp_gzip to K230 board
> *patch6: add K230 decomp_gzip qtest
> *patch7: add a noc-stub region in K230 board
>
> Patch-v2 is posted in:
> https://lore.kernel.org/qemu-devel/20260727155702.36484-1-dingtao0430@163.com/
>
> Changes in v3:
> *patch1:
> Removed temporarily unimplemented GDMA register read and write.
> Print with qemu_log_mask for access register errors.
> *patch4:
> Print with qemu_log_mask for handle error ack signal.
>
> Tao Ding (7):
> hw/dma: add K230 gsdma
> hw/riscv: k230: add gsdma in K230 board
> tests/qtest: add test for K230 gsdma
> hw/misc: add K230 decomp gzip
> hw/riscv: k230: add decomp gzip in K230 board
> tests/qtest: add test for K230 decomp gzip
> hw/riscv: k230: add a noc stub region in K230 board
This is causing some coverity issues
Can you send patches to fix them up?
*** CID 1685517: Integer handling issues
(OVERFLOW_BEFORE_WIDEN)
/builds/qemu-project/qemu/hw/misc/k230_decomp_gzip.c: 62 in
k230_decomp_gzip_input_addr()
56 s->output.slot * K230_DECOMP_GZIP_BLOCK_SIZE +
57 s->output.current_offset;
58 }
59
60 static hwaddr k230_decomp_gzip_input_addr(K230DecompGzipState
*s)
61 {
>>> CID 1685517: Integer handling issues
(OVERFLOW_BEFORE_WIDEN)
>>> Potentially overflowing expression "s->input.slot * 131072U"
with type "unsigned int" (32 bits, unsigned) is evaluated using 32-bit
arithmetic, and then used in a context that expects an expression of
type "hwaddr" (64 bits, unsigned).
62 return s->input.slot * K230_DECOMP_GZIP_BLOCK_SIZE +
63 K230_DECOMP_GZIP_SRAM_IN_BASE;
64 }
65
66 static uint32_t
k230_decomp_gzip_current_input_size(K230DecompGzipState *s)
67 {
*** CID 1685516: Integer handling issues
(OVERFLOW_BEFORE_WIDEN)
/builds/qemu-project/qemu/tests/qtest/k230-decomp-gzip-test.c: 49
in k230_sram_input_addr()
43 return K230_SRAM_BASE + off;
44 }
45
46 static inline hwaddr k230_sram_input_addr(unsigned int slot)
47 {
48 return k230_sram_addr(K230_DECOMP_GZIP_SRAM_IN_BASE +
>>> CID 1685516: Integer handling issues
(OVERFLOW_BEFORE_WIDEN)
>>> Potentially overflowing expression "slot * 131072U" with type
"unsigned int" (32 bits, unsigned) is evaluated using 32-bit
arithmetic, and then used in a context that expects an expression of
type "hwaddr" (64 bits, unsigned).
49 slot * K230_DECOMP_GZIP_BLOCK_SIZE);
50 }
51
52 /*
53 * test_gzip_data was generated by compressing test_payload in
gzip format
54 * using Dynamic Huffman coding. The compression method byte in
the gzip
*** CID 1685515: Integer handling issues
(OVERFLOW_BEFORE_WIDEN)
/builds/qemu-project/qemu/hw/misc/k230_decomp_gzip.c: 56 in
k230_decomp_gzip_output_addr()
50 MEMTXATTRS_UNSPECIFIED, buf, len)
== MEMTX_OK;
51 }
52
53 static hwaddr k230_decomp_gzip_output_addr(K230DecompGzipState
*s)
54 {
55 return K230_DECOMP_GZIP_SRAM_OUT_BASE +
>>> CID 1685515: Integer handling issues
(OVERFLOW_BEFORE_WIDEN)
>>> Potentially overflowing expression "s->output.slot * 131072U"
with type "unsigned int" (32 bits, unsigned) is evaluated using 32-bit
arithmetic, and then used in a context that expects an expression of
type "hwaddr" (64 bits, unsigned).
56 s->output.slot * K230_DECOMP_GZIP_BLOCK_SIZE +
57 s->output.current_offset;
58 }
59
60 static hwaddr k230_decomp_gzip_input_addr(K230DecompGzipState
*s)
61 {
*** CID 1685514: (INTEGER_OVERFLOW)
/builds/qemu-project/qemu/hw/dma/k230_gsdma.c: 332 in
k230_gsdma_read()
326 "%s: not implement gdma at offset 0x%"
HWADDR_PRIx
327 "\n", __func__, addr);
328 }
329 break;
330 }
331
>>> CID 1685514: (INTEGER_OVERFLOW)
>>> Expression "ch", where "(addr - 80UL) / 48UL" is known to be
equal to 1431655763, overflows the type of "ch", which is type
"unsigned int".
332 ch = (addr - K230_GSDMA_CH_BASE) / K230_GSDMA_CH_STRIDE;
333 ch_off = (addr - K230_GSDMA_CH_BASE) %
K230_GSDMA_CH_STRIDE;
334 if (ch < K230_GSDMA_NUM_SDMA_CHANNELS) {
335 switch (ch_off) {
336 case K230_GSDMA_CH_CTL:
337 break;
/builds/qemu-project/qemu/hw/dma/k230_gsdma.c: 332 in
k230_gsdma_read()
326 "%s: not implement gdma at offset 0x%"
HWADDR_PRIx
327 "\n", __func__, addr);
328 }
329 break;
330 }
331
>>> CID 1685514: (INTEGER_OVERFLOW)
>>> Expression "addr - 80UL", where "addr" is known to be equal to
0, underflows the type of "addr - 80UL", which is type "unsigned long".
332 ch = (addr - K230_GSDMA_CH_BASE) / K230_GSDMA_CH_STRIDE;
333 ch_off = (addr - K230_GSDMA_CH_BASE) %
K230_GSDMA_CH_STRIDE;
334 if (ch < K230_GSDMA_NUM_SDMA_CHANNELS) {
335 switch (ch_off) {
336 case K230_GSDMA_CH_CTL:
337 break;
*** CID 1685513: Control flow issues (UNREACHABLE)
/builds/qemu-project/qemu/disas/riscv.c: 2562 in
decode_inst_opcode()
2556 case 3: return &op_fscsr;
2557 default: return &op_csrrw;
2558 }
2559 break;
2560 case 2:
2561 return &op_csrrs;
>>> CID 1685513: Control flow issues (UNREACHABLE)
>>> This code cannot be reached: "if (operand_rs1(inst) == 0U...".
2562 if (operand_rs1(inst) == 0) {
2563 switch (operand_csr12(inst)) {
2564 case 0x001: return &op_frflags;
2565 case 0x002: return &op_frrm;
2566 case 0x003: return &op_frcsr;
2567 case 0xc00: return &op_rdcycle;
>
> MAINTAINERS | 6 +
> docs/system/riscv/k230.rst | 2 +
> hw/dma/Kconfig | 3 +
> hw/dma/k230_gsdma.c | 551
> ++++++++++++++++++++++++++++
> hw/dma/meson.build | 1 +
> hw/dma/trace-events | 6 +
> hw/misc/Kconfig | 3 +
> hw/misc/k230_decomp_gzip.c | 511 ++++++++++++++++++++++++++
> hw/misc/meson.build | 1 +
> hw/misc/trace-events | 4 +
> hw/riscv/Kconfig | 2 +
> hw/riscv/k230.c | 38 +-
> include/hw/dma/k230_gsdma.h | 130 +++++++
> include/hw/misc/k230_decomp_gzip.h | 92 +++++
> include/hw/riscv/k230.h | 5 +
> tests/qtest/k230-decomp-gzip-test.c | 200 ++++++++++
> tests/qtest/k230-gsdma-test.c | 201 ++++++++++
> tests/qtest/meson.build | 2 +-
> 18 files changed, 1750 insertions(+), 8 deletions(-)
> create mode 100644 hw/dma/k230_gsdma.c
> create mode 100644 hw/misc/k230_decomp_gzip.c
> create mode 100644 include/hw/dma/k230_gsdma.h
> create mode 100644 include/hw/misc/k230_decomp_gzip.h
> create mode 100644 tests/qtest/k230-decomp-gzip-test.c
> create mode 100644 tests/qtest/k230-gsdma-test.c
>
>
> base-commit: 300438ffbb8d9430cac2fcc15cba6f482b2c0587