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fix(debugger): use per-context fences for vm_bind operations

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- vm_bind with user fence updates fence value independently for every
VM hence with per-context VMs, every context needs its unique fence
address. This prevents 2 contexts from updating value possibly
writing lower value than the one that was already stored

Resolves: NEO-8004

Signed-off-by: Mateusz Hoppe <mateusz.hoppe@intel.com>
This commit is contained in:
Mateusz Hoppe
2023-05-23 16:06:03 +00:00
committed by Compute-Runtime-Automation
parent af4fd337c5
commit 7d82b690e4
6 changed files with 133 additions and 5 deletions
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25
shared/source/os_interface/linux/os_context_linux.cpp
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@@ -12,6 +12,7 @@
#include "shared/source/execution_environment/root_device_environment.h"
#include "shared/source/helpers/engine_node_helper.h"
#include "shared/source/helpers/hw_info.h"
#include "shared/source/helpers/ptr_math.h"
#include "shared/source/os_interface/linux/drm_neo.h"
#include "shared/source/os_interface/linux/ioctl_helper.h"
#include "shared/source/os_interface/os_context.h"
@@ -30,7 +31,10 @@ OsContext *OsContextLinux::create(OSInterface *osInterface, uint32_t rootDeviceI
OsContextLinux::OsContextLinux(Drm &drm, uint32_t rootDeviceIndex, uint32_t contextId, const EngineDescriptor &engineDescriptor)
: OsContext(rootDeviceIndex, contextId, engineDescriptor),
drm(drm) {}
drm(drm) {
pagingFence.fill(0u);
fenceVal.fill(0u);
}
bool OsContextLinux::initializeContext() {
auto hwInfo = drm.getRootDeviceEnvironment().getHardwareInfo();
@@ -88,11 +92,28 @@ Drm &OsContextLinux::getDrm() const {
void OsContextLinux::waitForPagingFence() {
for (auto drmIterator = 0u; drmIterator < this->deviceBitfield.size(); drmIterator++) {
if (this->deviceBitfield.test(drmIterator)) {
drm.waitForBind(drmIterator);
this->waitForBind(drmIterator);
}
}
}
void OsContextLinux::waitForBind(uint32_t drmIterator) {
if (drm.isPerContextVMRequired()) {
if (pagingFence[drmIterator] >= fenceVal[drmIterator]) {
return;
}
auto lock = drm.lockBindFenceMutex();
auto fenceAddress = castToUint64(&this->pagingFence[drmIterator]);
auto fenceValue = this->fenceVal[drmIterator];
lock.unlock();
drm.waitUserFence(0u, fenceAddress, fenceValue, Drm::ValueWidth::U64, -1, drm.getIoctlHelper()->getWaitUserFenceSoftFlag());
} else {
drm.waitForBind(drmIterator);
}
}
void OsContextLinux::reInitializeContext() {}
uint64_t OsContextLinux::getOfflineDumpContextId(uint32_t deviceIndex) const {