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Kernel: Fix vmmouse detection method

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Also, add debug messages in the VMWareBackdoor class.
This commit is contained in:
Liav A 2020-02-05 17:54:15 +02:00 committed by Andreas Kling
parent 6070fe581b
commit 8e8f5c212b
Notes: sideshowbarker 2024-07-19 09:36:16 +09:00 
Author: https://github.com/supercomputer7
Commit: https://github.com/SerenityOS/serenity/commit/8e8f5c212b5
Pull-request: https://github.com/SerenityOS/serenity/pull/1182
Reviewed-by: https://github.com/awesomekling
1 changed files with 29 additions and 19 deletions
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48
Kernel/Devices/VMWareBackdoor.cpp
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@ -25,6 +25,7 @@
*/
#include <AK/Assertions.h>
#include <AK/String.h>
#include <Kernel/Arch/i386/CPU.h>
#include <Kernel/Devices/VMWareBackdoor.h>
#include <Kernel/IO.h>
@ -36,6 +37,9 @@
#define VMMOUSE_REQUEST_RELATIVE 0x4c455252
#define VMMOUSE_REQUEST_ABSOLUTE 0x53424152
#define VMMOUSE_QEMU_VERSION 0x3442554a
//#define VMWAREBACKDOOR_DEBUG
static VMWareBackdoor* s_vmware_backdoor;
static bool is_initialized()
@ -86,11 +90,13 @@ bool VMWareBackdoor::detect_vmmouse()
if (!supported())
return false;
VMWareCommand command;
command.bx = 0;
command.command = VMMOUSE_GETVERSION;
command.bx = VMMOUSE_READ_ID;
command.command = VMMOUSE_COMMAND;
send(command);
// Apparently after a VMMOUSE_GETVERSION command, we should see that EBX register = VMWARE_MAGIC
if (command.bx != VMWARE_MAGIC || command.ax == 0xFFFFFFFF)
command.bx = 1;
command.command = VMMOUSE_DATA;
send(command);
if (command.ax != VMMOUSE_QEMU_VERSION)
return false;
return true;
}
@ -108,21 +114,13 @@ void VMWareBackdoor::enable_absolute_vmmouse()
VMWareCommand command;
// Enable vmmouse
command.bx = VMMOUSE_READ_ID;
command.command = VMMOUSE_COMMAND;
send(command);
// Status
command.bx = 0;
command.command = VMMOUSE_STATUS;
send(command);
// Read Data
command.bx = 1;
command.command = VMMOUSE_DATA;
send(command);
if (command.ax == 0xFFFF0000) {
kprintf("VMMouse retuned bad status.\n");
return;
}
// Enable absolute vmmouse
command.bx = VMMOUSE_REQUEST_ABSOLUTE;
@ -144,18 +142,30 @@ void VMWareBackdoor::disable_absolute_vmmouse()
void VMWareBackdoor::send_highbandwidth(VMWareCommand& command)
{
if (supported())
if (supported()) {
IO::vmware_highbandwidth_send(command);
#ifdef VMWAREBACKDOOR_DEBUG
dbg() << "VMWareBackdoor Command High bandwidth Send Results: EAX " << String::format("%x", command.ax) << " EBX " << String::format("%x", command.bx) << " ECX " << String::format("%x", command.cx) << " EDX " << String::format("%x", command.dx);
#endif
}
}
void VMWareBackdoor::get_highbandwidth(VMWareCommand& command)
{
if (supported())
if (supported()) {
IO::vmware_highbandwidth_get(command);
#ifdef VMWAREBACKDOOR_DEBUG
dbg() << "VMWareBackdoor Command High bandwidth Get Results: EAX " << String::format("%x", command.ax) << " EBX " << String::format("%x", command.bx) << " ECX " << String::format("%x", command.cx) << " EDX " << String::format("%x", command.dx);
#endif
}
}
void VMWareBackdoor::send(VMWareCommand& command)
{
if (supported())
if (supported()) {
IO::vmware_out(command);
#ifdef VMWAREBACKDOOR_DEBUG
dbg() << "VMWareBackdoor Command Send Results: EAX " << String::format("%x", command.ax) << " EBX " << String::format("%x", command.bx) << " ECX " << String::format("%x", command.cx) << " EDX " << String::format("%x", command.dx);
#endif
}
}