diff options
Diffstat (limited to 'kernel/main.c')
| -rw-r--r-- | kernel/main.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/kernel/main.c b/kernel/main.c index 454f3b9..52156dc 100644 --- a/kernel/main.c +++ b/kernel/main.c @@ -2540,6 +2540,36 @@ module_param_cb(sema_counter, &nv_vgpu_sema_counter_ops, NULL, 0200); MODULE_PARM_DESC(sema_counter, "Register channel GPU completion counter (h_object,pa)"); /* + * Debug: dump a range of the emulated vidmem (BAR1 shadow) into the kernel + * log, to verify where a decoded CE copy actually landed: + * echo 0x227000,256 > .../parameters/sema_vidmem_dump + */ +static int nv_vgpu_sema_vidmem_dump_set(const char *val, + const struct kernel_param *kp) +{ + char buf[64]; + char *comma; + u64 addr = 0, len = 0; + + strscpy(buf, val, sizeof(buf)); + comma = strchr(buf, ','); + if (!comma) + return -EINVAL; + *comma = '\0'; + if (kstrtoull(buf, 0, &addr) || kstrtoull(comma + 1, 0, &len)) + return -EINVAL; + + return gsp_sema_service_dump_vidmem(addr, len); +} + +static const struct kernel_param_ops nv_vgpu_sema_vidmem_dump_ops = { + .set = nv_vgpu_sema_vidmem_dump_set, +}; + +module_param_cb(sema_vidmem_dump, &nv_vgpu_sema_vidmem_dump_ops, NULL, 0200); +MODULE_PARM_DESC(sema_vidmem_dump, "Dump emulated vidmem (addr,len) to the kernel log"); + +/* * Debug: find page-table entries pointing at a physical address, in guest RAM * and emulated vidmem: * echo 0x12442b000 > .../parameters/scan_pt |