Misc fixes for 8.2

- memory: Avoid unaligned accesses (Patrick)
 - target/riscv: Fix variable shadowing (Daniel)
 - tests/avocado: Update URL, skip flaky test (Alex, Phil)
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Merge tag 'misc-fixes-20231204' of https://github.com/philmd/qemu into staging

Misc fixes for 8.2

- memory: Avoid unaligned accesses (Patrick)
- target/riscv: Fix variable shadowing (Daniel)
- tests/avocado: Update URL, skip flaky test (Alex, Phil)

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# gpg: Signature made Mon 04 Dec 2023 10:23:58 EST
# gpg:                using RSA key FAABE75E12917221DCFD6BB2E3E32C2CDEADC0DE
# gpg: Good signature from "Philippe Mathieu-Daudé (F4BUG) <f4bug@amsat.org>" [full]
# Primary key fingerprint: FAAB E75E 1291 7221 DCFD  6BB2 E3E3 2C2C DEAD C0DE

* tag 'misc-fixes-20231204' of https://github.com/philmd/qemu:
  tests/avocado: mark ReplayKernelNormal.test_mips64el_malta as flaky
  tests/avocado: Update yamon-bin-02.22.zip URL
  target/riscv/kvm: fix shadowing in kvm_riscv_(get|put)_regs_csr
  system/memory: use ldn_he_p/stn_he_p

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

system/memory.c

@@ -1339,22 +1339,7 @@ static uint64_t memory_region_ram_device_read(void *opaque,
                                               hwaddr addr, unsigned size)
 {
     MemoryRegion *mr = opaque;
-    uint64_t data = (uint64_t)~0;
-
-    switch (size) {
-    case 1:
-        data = *(uint8_t *)(mr->ram_block->host + addr);
-        break;
-    case 2:
-        data = *(uint16_t *)(mr->ram_block->host + addr);
-        break;
-    case 4:
-        data = *(uint32_t *)(mr->ram_block->host + addr);
-        break;
-    case 8:
-        data = *(uint64_t *)(mr->ram_block->host + addr);
-        break;
-    }
+    uint64_t data = ldn_he_p(mr->ram_block->host + addr, size);
 
     trace_memory_region_ram_device_read(get_cpu_index(), mr, addr, data, size);
 
@@ -1368,20 +1353,7 @@ static void memory_region_ram_device_write(void *opaque, hwaddr addr,
 
     trace_memory_region_ram_device_write(get_cpu_index(), mr, addr, data, size);
 
-    switch (size) {
-    case 1:
-        *(uint8_t *)(mr->ram_block->host + addr) = (uint8_t)data;
-        break;
-    case 2:
-        *(uint16_t *)(mr->ram_block->host + addr) = (uint16_t)data;
-        break;
-    case 4:
-        *(uint32_t *)(mr->ram_block->host + addr) = (uint32_t)data;
-        break;
-    case 8:
-        *(uint64_t *)(mr->ram_block->host + addr) = data;
-        break;
-    }
+    stn_he_p(mr->ram_block->host + addr, size, data);
 }
 
 static const MemoryRegionOps ram_device_mem_ops = {

target/riscv/kvm/kvm-cpu.c

@@ -87,17 +87,17 @@ static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type,
 
 #define KVM_RISCV_GET_CSR(cs, env, csr, reg) \
     do { \
-        int ret = kvm_get_one_reg(cs, RISCV_CSR_REG(env, csr), &reg); \
-        if (ret) { \
-            return ret; \
+        int _ret = kvm_get_one_reg(cs, RISCV_CSR_REG(env, csr), &reg); \
+        if (_ret) { \
+            return _ret; \
         } \
     } while (0)
 
 #define KVM_RISCV_SET_CSR(cs, env, csr, reg) \
     do { \
-        int ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, csr), &reg); \
-        if (ret) { \
-            return ret; \
+        int _ret = kvm_set_one_reg(cs, RISCV_CSR_REG(env, csr), &reg); \
+        if (_ret) { \
+            return _ret; \
         } \
     } while (0)
 
@@ -533,7 +533,6 @@ static int kvm_riscv_put_regs_core(CPUState *cs)
 
 static int kvm_riscv_get_regs_csr(CPUState *cs)
 {
-    int ret = 0;
     CPURISCVState *env = &RISCV_CPU(cs)->env;
 
     KVM_RISCV_GET_CSR(cs, env, sstatus, env->mstatus);
@@ -545,12 +544,12 @@ static int kvm_riscv_get_regs_csr(CPUState *cs)
     KVM_RISCV_GET_CSR(cs, env, stval, env->stval);
     KVM_RISCV_GET_CSR(cs, env, sip, env->mip);
     KVM_RISCV_GET_CSR(cs, env, satp, env->satp);
-    return ret;
+
+    return 0;
 }
 
 static int kvm_riscv_put_regs_csr(CPUState *cs)
 {
-    int ret = 0;
     CPURISCVState *env = &RISCV_CPU(cs)->env;
 
     KVM_RISCV_SET_CSR(cs, env, sstatus, env->mstatus);
@@ -563,7 +562,7 @@ static int kvm_riscv_put_regs_csr(CPUState *cs)
     KVM_RISCV_SET_CSR(cs, env, sip, env->mip);
     KVM_RISCV_SET_CSR(cs, env, satp, env->satp);
 
-    return ret;
+    return 0;
 }
 
 static int kvm_riscv_get_regs_fp(CPUState *cs)

tests/avocado/replay_kernel.py

@@ -119,6 +119,8 @@ class ReplayKernelNormal(ReplayKernelBase):
 
         self.run_rr(kernel_path, kernel_command_line, console_pattern, shift=5)
 
+    # See https://gitlab.com/qemu-project/qemu/-/issues/2013
+    @skipUnless(os.getenv('QEMU_TEST_FLAKY_TESTS'), 'Test is unstable on GitLab')
     def test_mips64el_malta(self):
         """
         This test requires the ar tool to extract "data.tar.gz" from
@@ -134,6 +136,7 @@ class ReplayKernelNormal(ReplayKernelBase):
 
         :avocado: tags=arch:mips64el
         :avocado: tags=machine:malta
+        :avocado: tags=flaky
         """
         deb_url = ('http://snapshot.debian.org/archive/debian/'
                    '20130217T032700Z/pool/main/l/linux-2.6/'