mii/qemu
1
0
Fork 0
mirror of https://github.com/mii443/qemu.git synced 2025-12-03 02:58:29 +00:00
Code Issues Packages Projects Releases Wiki Activity

hyperv: Add support to process syndbg commands

Browse Source 
SynDbg commands can come from two different flows:
1. Hypercalls, in this mode the data being sent is fully
   encapsulated network packets.
2. SynDbg specific MSRs, in this mode only the data that needs to be
   transfered is passed.

Signed-off-by: Jon Doron <arilou@gmail.com>
Reviewed-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20220216102500.692781-4-arilou@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Jon Doron
2022-02-16 12:24:59 +02:00
committed by Paolo Bonzini
parent ccbdf5e81b
commit 73d2407407
8 changed files with 451 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

243
hw/hyperv/hyperv.c
View File

@@ -704,3 +704,246 @@ uint16_t hyperv_hcall_signal_event(uint64_t param, bool fast)
}
return HV_STATUS_INVALID_CONNECTION_ID;
}
static HvSynDbgHandler hv_syndbg_handler;
static void *hv_syndbg_context;
void hyperv_set_syndbg_handler(HvSynDbgHandler handler, void *context)
{
assert(!hv_syndbg_handler);
hv_syndbg_handler = handler;
hv_syndbg_context = context;
}
uint16_t hyperv_hcall_reset_dbg_session(uint64_t outgpa)
{
uint16_t ret;
HvSynDbgMsg msg;
struct hyperv_reset_debug_session_output *reset_dbg_session = NULL;
hwaddr len;
if (!hv_syndbg_handler) {
ret = HV_STATUS_INVALID_HYPERCALL_CODE;
goto cleanup;
}
len = sizeof(*reset_dbg_session);
reset_dbg_session = cpu_physical_memory_map(outgpa, &len, 1);
if (!reset_dbg_session || len < sizeof(*reset_dbg_session)) {
ret = HV_STATUS_INSUFFICIENT_MEMORY;
goto cleanup;
}
msg.type = HV_SYNDBG_MSG_CONNECTION_INFO;
ret = hv_syndbg_handler(hv_syndbg_context, &msg);
if (ret) {
goto cleanup;
}
reset_dbg_session->host_ip = msg.u.connection_info.host_ip;
reset_dbg_session->host_port = msg.u.connection_info.host_port;
/* The following fields are only used as validation for KDVM */
memset(&reset_dbg_session->host_mac, 0,
sizeof(reset_dbg_session->host_mac));
reset_dbg_session->target_ip = msg.u.connection_info.host_ip;
reset_dbg_session->target_port = msg.u.connection_info.host_port;
memset(&reset_dbg_session->target_mac, 0,
sizeof(reset_dbg_session->target_mac));
cleanup:
if (reset_dbg_session) {
cpu_physical_memory_unmap(reset_dbg_session,
sizeof(*reset_dbg_session), 1, len);
}
return ret;
}
uint16_t hyperv_hcall_retreive_dbg_data(uint64_t ingpa, uint64_t outgpa,
bool fast)
{
uint16_t ret;
struct hyperv_retrieve_debug_data_input *debug_data_in = NULL;
struct hyperv_retrieve_debug_data_output *debug_data_out = NULL;
hwaddr in_len, out_len;
HvSynDbgMsg msg;
if (fast || !hv_syndbg_handler) {
ret = HV_STATUS_INVALID_HYPERCALL_CODE;
goto cleanup;
}
in_len = sizeof(*debug_data_in);
debug_data_in = cpu_physical_memory_map(ingpa, &in_len, 0);
if (!debug_data_in || in_len < sizeof(*debug_data_in)) {
ret = HV_STATUS_INSUFFICIENT_MEMORY;
goto cleanup;
}
out_len = sizeof(*debug_data_out);
debug_data_out = cpu_physical_memory_map(outgpa, &out_len, 1);
if (!debug_data_out || out_len < sizeof(*debug_data_out)) {
ret = HV_STATUS_INSUFFICIENT_MEMORY;
goto cleanup;
}
msg.type = HV_SYNDBG_MSG_RECV;
msg.u.recv.buf_gpa = outgpa + sizeof(*debug_data_out);
msg.u.recv.count = TARGET_PAGE_SIZE - sizeof(*debug_data_out);
msg.u.recv.options = debug_data_in->options;
msg.u.recv.timeout = debug_data_in->timeout;
msg.u.recv.is_raw = true;
ret = hv_syndbg_handler(hv_syndbg_context, &msg);
if (ret == HV_STATUS_NO_DATA) {
debug_data_out->retrieved_count = 0;
debug_data_out->remaining_count = debug_data_in->count;
goto cleanup;
} else if (ret != HV_STATUS_SUCCESS) {
goto cleanup;
}
debug_data_out->retrieved_count = msg.u.recv.retrieved_count;
debug_data_out->remaining_count =
debug_data_in->count - msg.u.recv.retrieved_count;
cleanup:
if (debug_data_out) {
cpu_physical_memory_unmap(debug_data_out, sizeof(*debug_data_out), 1,
out_len);
}
if (debug_data_in) {
cpu_physical_memory_unmap(debug_data_in, sizeof(*debug_data_in), 0,
in_len);
}
return ret;
}
uint16_t hyperv_hcall_post_dbg_data(uint64_t ingpa, uint64_t outgpa, bool fast)
{
uint16_t ret;
struct hyperv_post_debug_data_input *post_data_in = NULL;
struct hyperv_post_debug_data_output *post_data_out = NULL;
hwaddr in_len, out_len;
HvSynDbgMsg msg;
if (fast || !hv_syndbg_handler) {
ret = HV_STATUS_INVALID_HYPERCALL_CODE;
goto cleanup;
}
in_len = sizeof(*post_data_in);
post_data_in = cpu_physical_memory_map(ingpa, &in_len, 0);
if (!post_data_in || in_len < sizeof(*post_data_in)) {
ret = HV_STATUS_INSUFFICIENT_MEMORY;
goto cleanup;
}
if (post_data_in->count > TARGET_PAGE_SIZE - sizeof(*post_data_in)) {
ret = HV_STATUS_INVALID_PARAMETER;
goto cleanup;
}
out_len = sizeof(*post_data_out);
post_data_out = cpu_physical_memory_map(outgpa, &out_len, 1);
if (!post_data_out || out_len < sizeof(*post_data_out)) {
ret = HV_STATUS_INSUFFICIENT_MEMORY;
goto cleanup;
}
msg.type = HV_SYNDBG_MSG_SEND;
msg.u.send.buf_gpa = ingpa + sizeof(*post_data_in);
msg.u.send.count = post_data_in->count;
msg.u.send.is_raw = true;
ret = hv_syndbg_handler(hv_syndbg_context, &msg);
if (ret != HV_STATUS_SUCCESS) {
goto cleanup;
}
post_data_out->pending_count = msg.u.send.pending_count;
ret = post_data_out->pending_count ? HV_STATUS_INSUFFICIENT_BUFFERS :
HV_STATUS_SUCCESS;
cleanup:
if (post_data_out) {
cpu_physical_memory_unmap(post_data_out,
sizeof(*post_data_out), 1, out_len);
}
if (post_data_in) {
cpu_physical_memory_unmap(post_data_in,
sizeof(*post_data_in), 0, in_len);
}
return ret;
}
uint32_t hyperv_syndbg_send(uint64_t ingpa, uint32_t count)
{
HvSynDbgMsg msg;
if (!hv_syndbg_handler) {
return HV_SYNDBG_STATUS_INVALID;
}
msg.type = HV_SYNDBG_MSG_SEND;
msg.u.send.buf_gpa = ingpa;
msg.u.send.count = count;
msg.u.send.is_raw = false;
if (hv_syndbg_handler(hv_syndbg_context, &msg)) {
return HV_SYNDBG_STATUS_INVALID;
}
return HV_SYNDBG_STATUS_SEND_SUCCESS;
}
uint32_t hyperv_syndbg_recv(uint64_t ingpa, uint32_t count)
{
uint16_t ret;
HvSynDbgMsg msg;
if (!hv_syndbg_handler) {
return HV_SYNDBG_STATUS_INVALID;
}
msg.type = HV_SYNDBG_MSG_RECV;
msg.u.recv.buf_gpa = ingpa;
msg.u.recv.count = count;
msg.u.recv.options = 0;
msg.u.recv.timeout = 0;
msg.u.recv.is_raw = false;
ret = hv_syndbg_handler(hv_syndbg_context, &msg);
if (ret != HV_STATUS_SUCCESS) {
return 0;
}
return HV_SYNDBG_STATUS_SET_SIZE(HV_SYNDBG_STATUS_RECV_SUCCESS,
msg.u.recv.retrieved_count);
}
void hyperv_syndbg_set_pending_page(uint64_t ingpa)
{
HvSynDbgMsg msg;
if (!hv_syndbg_handler) {
return;
}
msg.type = HV_SYNDBG_MSG_SET_PENDING_PAGE;
msg.u.pending_page.buf_gpa = ingpa;
hv_syndbg_handler(hv_syndbg_context, &msg);
}
uint64_t hyperv_syndbg_query_options(void)
{
HvSynDbgMsg msg;
if (!hv_syndbg_handler) {
return 0;
}
msg.type = HV_SYNDBG_MSG_QUERY_OPTIONS;
if (hv_syndbg_handler(hv_syndbg_context, &msg) != HV_STATUS_SUCCESS) {
return 0;
}
return msg.u.query_options.options;
}