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genode/repos/base-nova/include/nova/util.h

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NOVA: use cap_session to allocate portals
2012-08-08 12:23:13 +00:00
/*
* \brief Helper code used by core as base framework
* \author Alexander Boettcher
* \date 2012-08-08
*/
/*
Update copyright headers to 2013
2013-01-10 20:44:47 +00:00
* Copyright (C) 2012-2013 Genode Labs GmbH
NOVA: use cap_session to allocate portals
2012-08-08 12:23:13 +00:00
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
base: update include guards This patch cleans up the include guards, assisted by the tool/fix_include_ifndef script.
2016-01-20 19:52:51 +00:00
#ifndef _INCLUDE__NOVA__UTIL_H_
#define _INCLUDE__NOVA__UTIL_H_
NOVA: use cap_session to allocate portals
2012-08-08 12:23:13 +00:00
base: avoid use of deprecated base/printf.h Besides adapting the components to the use of base/log.h, the patch cleans up a few base headers, i.e., it removes unused includes from root/component.h, specifically base/heap.h and ram_session/ram_session.h. Hence, components that relied on the implicit inclusion of those headers have to manually include those headers now. While adjusting the log messages, I repeatedly stumbled over the problem that printing char * arguments is ambiguous. It is unclear whether to print the argument as pointer or null-terminated string. To overcome this problem, the patch introduces a new type 'Cstring' that allows the caller to express that the argument should be handled as null-terminated string. As a nice side effect, with this type in place, the optional len argument of the 'String' class could be removed. Instead of supplying a pair of (char const *, size_t), the constructor accepts a 'Cstring'. This, in turn, clears the way let the 'String' constructor use the new output mechanism to assemble a string from multiple arguments (and thereby getting rid of snprintf within Genode in the near future). To enforce the explicit resolution of the char * ambiguity, the 'char *' overload of the 'print' function is marked as deleted. Issue #1987
2016-07-13 17:07:09 +00:00
#include <base/log.h>
NOVA: use cap_session to allocate portals
2012-08-08 12:23:13 +00:00
#include <base/thread.h>
NOVA: let thread die if SM cap is invalid Patch prevents following bugs: * In sleep_forever the thread return from semaphore down if cap is revoked during destruction of a thread. This causes an endless loop consuming time not available for other threads. * In lock_helper and cap_sel_alloc the thread return from the lock() method even if the semaphore down call failed because of an revoked semaphore. This lead to the situation that a thread subject to de-construction returns from the lock method, but not holding the lock, entering the critical section and modifying state inside the critical section. Another thread in parallel already in the critical section or entering the critical section also modifies the state. This lead to curious bugs ... * thread_nova, thread_start, irq_session Detect early bugs if the SM is gone unexpectedly where it should never happen.
2012-08-03 08:56:08 +00:00
__attribute__((always_inline))
inline void nova_die(const char * text = 0)
{
/*
* If thread is de-constructed the sessions are already gone.
* Be careful when enabling printf here.
NOVA: drop special utcb handling of main thread Unify handling of UTCBs. The utcb of the main thread is with commit ea38aad30e6166a0da1ac8bd84b53d6e1962cfaf at a fixed location - per convention. So we can remove all the ugly code to transfer the utcb address during process creation. To do so also the UTCB of the main thread of Core must be inside Genode's thread context area to handle it the same way. Unfortunately the UTCB of the main thread of Core can't be chosen, it is defined by the kernel. Possible solutions: - make virtual address of first thread UTCB configurable in hypervisor - map the utcb of the first thread inside Core to the desired location This commit implements the second option. Kernel patch: make utcb map-able With the patch the Utcb of the main thread of Core is map-able. Fixes #374 Noux actually uses the sp variable during thread creation and expects to be set accordingly. This wasn't the case for the main thread, it was ever set to the address of the main thread UTCB.
2012-09-28 10:24:14 +00:00
*/
while (1)
NOVA: let thread die if SM cap is invalid Patch prevents following bugs: * In sleep_forever the thread return from semaphore down if cap is revoked during destruction of a thread. This causes an endless loop consuming time not available for other threads. * In lock_helper and cap_sel_alloc the thread return from the lock() method even if the semaphore down call failed because of an revoked semaphore. This lead to the situation that a thread subject to de-construction returns from the lock method, but not holding the lock, entering the critical section and modifying state inside the critical section. Another thread in parallel already in the critical section or entering the critical section also modifies the state. This lead to curious bugs ... * thread_nova, thread_start, irq_session Detect early bugs if the SM is gone unexpectedly where it should never happen.
2012-08-03 08:56:08 +00:00
asm volatile ("ud2a" : : "a"(text));
}
Whitespace
2012-11-24 17:27:03 +00:00
nova: use async. map for thread/pd bootstrap Fixes #2173
2016-11-30 18:36:32 +00:00
inline void request_event_portal(Genode::addr_t const cap,
Genode::addr_t const sel, Genode::addr_t event)
NOVA: use cap_session to allocate portals
2012-08-08 12:23:13 +00:00
{
Thread API cleanup This patch cleans up the thread API and comes with the following noteworthy changes: - Introduced Cpu_session::Weight type that replaces a formerly used plain integer value to prevent the accidental mix-up of arguments. - The enum definition of Cpu_session::DEFAULT_WEIGHT moved to Cpu_session::Weight::DEFAULT_WEIGHT - New Thread constructor that takes a 'Env &' as first argument. The original constructors are now marked as deprecated. For the common use case where the default 'Weight' and 'Affinity' are used, a shortcut is provided. In the long term, those two constructors should be the only ones to remain. - The former 'Thread<>' class template has been renamed to 'Thread_deprecated'. - The former 'Thread_base' class is now called 'Thread'. - The new 'name()' accessor returns the thread's name as 'Name' object as centrally defined via 'Cpu_session::Name'. It is meant to replace the old-fashioned 'name' method that takes a buffer and size as arguments. - Adaptation of the thread test to the new API Issue #1954
2016-05-04 10:27:17 +00:00
Genode::Thread * myself = Genode::Thread::myself();
base-nova: fully qualify Utcb type
2014-05-27 09:09:58 +00:00
Nova::Utcb *utcb = reinterpret_cast<Nova::Utcb *>(myself->utcb());
NOVA: use cap_session to allocate portals
2012-08-08 12:23:13 +00:00
/* save original receive window */
base-nova: fully qualify Utcb type
2014-05-27 09:09:58 +00:00
Nova::Crd orig_crd = utcb->crd_rcv;
NOVA: use cap_session to allocate portals
2012-08-08 12:23:13 +00:00
/* request event-handler portal */
nova: use async. map for thread/pd bootstrap Fixes #2173
2016-11-30 18:36:32 +00:00
utcb->crd_rcv = Nova::Obj_crd(sel, 0);
NOVA: use cap_session to allocate portals
2012-08-08 12:23:13 +00:00
utcb->msg[0] = event;
nova: use async. map for thread/pd bootstrap Fixes #2173
2016-11-30 18:36:32 +00:00
utcb->set_msg_word(1);
NOVA: use cap_session to allocate portals
2012-08-08 12:23:13 +00:00
nova: use async. map for thread/pd bootstrap Fixes #2173
2016-11-30 18:36:32 +00:00
Genode::uint8_t res = Nova::call(cap);
NOVA: use cap_session to allocate portals
2012-08-08 12:23:13 +00:00
/* restore original receive window */
utcb->crd_rcv = orig_crd;
nova: create sm for signalling via pager The 'pause' call on base-nova assumes that a thread can solely block in its associated semaphore. Main reason is that so core can unblock a thread in order that the recall exception gets delivered and the register state can be obtained. Unfortunately the signal session implementation creates a semaphore, which is unknown by the pager code. Instead create the semaphore via the pager of the thread, so that the pager can unblock the signal thread when a pause is issued. Issue #478
2013-09-26 12:31:56 +00:00
if (res)
nova: use async. map for thread/pd bootstrap Fixes #2173
2016-11-30 18:36:32 +00:00
Genode::error("request of event (", Genode::Hex(event), ") ",
base: avoid use of deprecated base/printf.h Besides adapting the components to the use of base/log.h, the patch cleans up a few base headers, i.e., it removes unused includes from root/component.h, specifically base/heap.h and ram_session/ram_session.h. Hence, components that relied on the implicit inclusion of those headers have to manually include those headers now. While adjusting the log messages, I repeatedly stumbled over the problem that printing char * arguments is ambiguous. It is unclear whether to print the argument as pointer or null-terminated string. To overcome this problem, the patch introduces a new type 'Cstring' that allows the caller to express that the argument should be handled as null-terminated string. As a nice side effect, with this type in place, the optional len argument of the 'String' class could be removed. Instead of supplying a pair of (char const *, size_t), the constructor accepts a 'Cstring'. This, in turn, clears the way let the 'String' constructor use the new output mechanism to assemble a string from multiple arguments (and thereby getting rid of snprintf within Genode in the near future). To enforce the explicit resolution of the char * ambiguity, the 'char *' overload of the 'print' function is marked as deleted. Issue #1987
2016-07-13 17:07:09 +00:00
"capability selector failed (res=", res, ")");
NOVA: use cap_session to allocate portals
2012-08-08 12:23:13 +00:00
}
nova: request native ec cap via pager Prerequisite to get rid of the base-nova special native_cap method in cpu_session. Vancouver/Seoul bootstrap code gets also much simpler. Issue #478
2013-09-25 09:53:49 +00:00
nova: use async. map for thread/pd bootstrap Fixes #2173
2016-11-30 18:36:32 +00:00
inline void request_native_ec_cap(Genode::addr_t const cap,
Genode::addr_t const sel)
nova: use in core one pager per CPU Fixes #1394
2014-09-05 15:00:31 +00:00
{
nova: use async. map for thread/pd bootstrap Fixes #2173
2016-11-30 18:36:32 +00:00
request_event_portal(cap, sel , ~0UL);
nova: use in core one pager per CPU Fixes #1394
2014-09-05 15:00:31 +00:00
}
nova: create sm for signalling via pager The 'pause' call on base-nova assumes that a thread can solely block in its associated semaphore. Main reason is that so core can unblock a thread in order that the recall exception gets delivered and the register state can be obtained. Unfortunately the signal session implementation creates a semaphore, which is unknown by the pager code. Instead create the semaphore via the pager of the thread, so that the pager can unblock the signal thread when a pause is issued. Issue #478
2013-09-26 12:31:56 +00:00
nova: use async. map for thread/pd bootstrap Fixes #2173
2016-11-30 18:36:32 +00:00
inline void request_signal_sm_cap(Genode::addr_t const cap,
nova: use in core one pager per CPU Fixes #1394
2014-09-05 15:00:31 +00:00
Genode::addr_t const sel)
{
nova: use async. map for thread/pd bootstrap Fixes #2173
2016-11-30 18:36:32 +00:00
request_event_portal(cap, sel, ~0UL - 1);
nova: use in core one pager per CPU Fixes #1394
2014-09-05 15:00:31 +00:00
}
nova: request native ec cap via pager Prerequisite to get rid of the base-nova special native_cap method in cpu_session. Vancouver/Seoul bootstrap code gets also much simpler. Issue #478
2013-09-25 09:53:49 +00:00
nova: support creation of vCPU in own PD With the patch a VMM is not forced anymore to co-located the VMM and VM in same PD. Fixes #949
2013-11-14 09:35:44 +00:00
nova: use async. map for thread/pd bootstrap Fixes #2173
2016-11-30 18:36:32 +00:00
inline void translate_remote_pager(Genode::addr_t const cap,
nova: support to run VBox vCPUs within same PD Issue #2173
2016-11-24 20:57:33 +00:00
Genode::addr_t const sel)
nova: support creation of vCPU in own PD With the patch a VMM is not forced anymore to co-located the VMM and VM in same PD. Fixes #949
2013-11-14 09:35:44 +00:00
{
Thread API cleanup This patch cleans up the thread API and comes with the following noteworthy changes: - Introduced Cpu_session::Weight type that replaces a formerly used plain integer value to prevent the accidental mix-up of arguments. - The enum definition of Cpu_session::DEFAULT_WEIGHT moved to Cpu_session::Weight::DEFAULT_WEIGHT - New Thread constructor that takes a 'Env &' as first argument. The original constructors are now marked as deprecated. For the common use case where the default 'Weight' and 'Affinity' are used, a shortcut is provided. In the long term, those two constructors should be the only ones to remain. - The former 'Thread<>' class template has been renamed to 'Thread_deprecated'. - The former 'Thread_base' class is now called 'Thread'. - The new 'name()' accessor returns the thread's name as 'Name' object as centrally defined via 'Cpu_session::Name'. It is meant to replace the old-fashioned 'name' method that takes a buffer and size as arguments. - Adaptation of the thread test to the new API Issue #1954
2016-05-04 10:27:17 +00:00
Genode::Thread * myself = Genode::Thread::myself();
base-nova: fully qualify Utcb type
2014-05-27 09:09:58 +00:00
Nova::Utcb *utcb = reinterpret_cast<Nova::Utcb *>(myself->utcb());
nova: support creation of vCPU in own PD With the patch a VMM is not forced anymore to co-located the VMM and VM in same PD. Fixes #949
2013-11-14 09:35:44 +00:00
/* save original receive window */
base-nova: fully qualify Utcb type
2014-05-27 09:09:58 +00:00
Nova::Crd orig_crd = utcb->crd_rcv;
nova: support creation of vCPU in own PD With the patch a VMM is not forced anymore to co-located the VMM and VM in same PD. Fixes #949
2013-11-14 09:35:44 +00:00
base-nova: fully qualify Utcb type
2014-05-27 09:09:58 +00:00
utcb->crd_rcv = Nova::Obj_crd();
nova: support creation of vCPU in own PD With the patch a VMM is not forced anymore to co-located the VMM and VM in same PD. Fixes #949
2013-11-14 09:35:44 +00:00
nova: use in core one pager per CPU Fixes #1394
2014-09-05 15:00:31 +00:00
Genode::uint8_t res = Nova::NOVA_OK;
enum {
nova: support to run VBox vCPUs within same PD Issue #2173
2016-11-24 20:57:33 +00:00
TRANSLATE = true, THIS_PD = false, NON_GUEST = false, HOTSPOT = 0
nova: use in core one pager per CPU Fixes #1394
2014-09-05 15:00:31 +00:00
};
nova: support to run VBox vCPUs within same PD Issue #2173
2016-11-24 20:57:33 +00:00
/* translate one item */
utcb->msg[0] = 0xaffe;
utcb->set_msg_word(1);
nova: use in core one pager per CPU Fixes #1394
2014-09-05 15:00:31 +00:00
nova: support to run VBox vCPUs within same PD Issue #2173
2016-11-24 20:57:33 +00:00
Nova::Obj_crd obj_crd(sel, 0);
if (utcb->append_item(obj_crd, HOTSPOT, THIS_PD, NON_GUEST, TRANSLATE))
nova: use in core one pager per CPU Fixes #1394
2014-09-05 15:00:31 +00:00
/* trigger the translation */
nova: use async. map for thread/pd bootstrap Fixes #2173
2016-11-30 18:36:32 +00:00
res = Nova::call(cap);
nova: support creation of vCPU in own PD With the patch a VMM is not forced anymore to co-located the VMM and VM in same PD. Fixes #949
2013-11-14 09:35:44 +00:00
/* restore original receive window */
utcb->crd_rcv = orig_crd;
nova: support to run VBox vCPUs within same PD Issue #2173
2016-11-24 20:57:33 +00:00
if (res != Nova::NOVA_OK)
base: avoid use of deprecated base/printf.h Besides adapting the components to the use of base/log.h, the patch cleans up a few base headers, i.e., it removes unused includes from root/component.h, specifically base/heap.h and ram_session/ram_session.h. Hence, components that relied on the implicit inclusion of those headers have to manually include those headers now. While adjusting the log messages, I repeatedly stumbled over the problem that printing char * arguments is ambiguous. It is unclear whether to print the argument as pointer or null-terminated string. To overcome this problem, the patch introduces a new type 'Cstring' that allows the caller to express that the argument should be handled as null-terminated string. As a nice side effect, with this type in place, the optional len argument of the 'String' class could be removed. Instead of supplying a pair of (char const *, size_t), the constructor accepts a 'Cstring'. This, in turn, clears the way let the 'String' constructor use the new output mechanism to assemble a string from multiple arguments (and thereby getting rid of snprintf within Genode in the near future). To enforce the explicit resolution of the char * ambiguity, the 'char *' overload of the 'print' function is marked as deleted. Issue #1987
2016-07-13 17:07:09 +00:00
Genode::error("setting exception portals for vCPU failed res=", res);
nova: support creation of vCPU in own PD With the patch a VMM is not forced anymore to co-located the VMM and VM in same PD. Fixes #949
2013-11-14 09:35:44 +00:00
}
base: update include guards This patch cleans up the include guards, assisted by the tool/fix_include_ifndef script.
2016-01-20 19:52:51 +00:00
#endif /* _INCLUDE__NOVA__UTIL_H_ */
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