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path: root/hw/spapr_hcall.c
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2012-06-24spapr: Add "memop" hypercallBenjamin Herrenschmidt
This adds a qemu-specific hypervisor call to the pseries machine which allows to do what amounts to memmove, memcpy and xor over regions of physical memory such as the framebuffer. This is the simplest way to get usable framebuffer speed from SLOF since the framebuffer isn't mapped in the VRMA and so would otherwise require an hcall per 8 bytes access. The performance is still not great but usable, and can be improved with a more complex implementation of the hcall itself if needed. This also adds some documentation for the qemu-specific hypercalls that we add to PAPR along with a new qemu,hypertas-functions property that mirrors ibm,hypertas-functions and provides some discoverability for the new calls. Note: I chose note to advertise H_RTAS to the guest via that mechanism. This is done on purpose, the guest uses the normal RTAS interfaces provided by qemu (including SLOF) which internally calls H_RTAS. We might in the future implement part (or even all) of RTAS inside the guest like IBM's firmware does and replace H_RTAS with some finer grained set of private hypercalls. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-01pseries: Fix use of global CPU statePeter Portante
Commit ed120055c7f9b26b5707d3ceabbe5a3f06aaf937 (Implement PAPR VPA functions for pSeries shared processor partitions) introduced the deregister_dtl() function and typo "emv" as name of its argument. This went unnoticed because the code in that function can access the global variable "env" so that no build failure resulted. Fix the argument to read "env". Resolves LP#986241. Signed-off-by: Peter Portante <peter.portante@redhat.com> Acked-by: Andreas Färber <afaerber@suse.de> [agraf: fixed typo in commit message] Signed-off-by: Alexander Graf <agraf@suse.de>
2012-03-14ppc hw/: Don't use CPUStateAndreas Färber
Scripted conversion: for file in hw/ppc*.[hc] hw/mpc8544_guts.c hw/spapr*.[hc] hw/virtex_ml507.c hw/xics.c; do sed -i "s/CPUState/CPUPPCState/g" $file done Signed-off-by: Andreas Färber <afaerber@suse.de> Acked-by: Anthony Liguori <aliguori@us.ibm.com>
2012-02-15qom: Unify type registrationAndreas Färber
Replace device_init() with generalized type_init(). While at it, unify naming convention: type_init([$prefix_]register_types) Also, type_init() is a function, so add preceding blank line where necessary and don't put a semicolon after the closing brace. Signed-off-by: Andreas Färber <afaerber@suse.de> Cc: Anthony Liguori <anthony@codemonkey.ws> Cc: malc <av1474@comtv.ru> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-10-06pseries: Implement hcall-bulk hypervisor interfaceDavid Gibson
This patch adds support for the H_REMOVE_BULK hypercall on the pseries machine. Strictly speaking this isn't necessarym since the kernel will only attempt to use this if hcall-bulk is advertised in the device tree, which previously it was not. Adding this support may give a marginal performance increase, but more importantly it reduces the differences between the emulated machine and an existing PowerVM or kvm system, both of which already implement hcall-bulk. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-10-06pseries: Add real mode debugging hcallsDavid Gibson
PAPR systems support several hypercalls intended for use in real mode debugging tools. These implement reads and writes to arbitrary guest physical addresses. This is useful for real mode software because it allows access to IO addresses and memory outside the RMA without going through the somewhat involved process of setting up the hash page table and enabling translation. We want these so that when we add real IO devices, the SLOF firmware can boot from them without having to enter virtual mode. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-10-06pseries: More complete WIMG validation in H_ENTER codeDavid Gibson
Currently our implementation of the H_ENTER hypercall, which inserts a mapping in the hash page table assumes that only ordinary memory is ever mapped, and only permits mapping attribute bits accordingly (WIMG==0010). However, we intend to start adding emulated IO to the pseries platform (and real IO with PCI passthrough on kvm) which means this simple test will no longer suffice. This patch extends the h_enter validation code to check if the given address is a RAM address. If it is it enforces WIMG==0010, otherwise it assumes that it is an IO mapping and instead enforces WIMG=010x. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-07-30exec.h cleanupBlue Swirl
Move softmmu_exec.h include directives from target-*/exec.h to target-*/op_helper.c. Move also various other stuff only used in op_helper.c there. Define global env in dyngen-exec.h. For i386, move wrappers for segment and FPU helpers from user-exec.c to op_helper.c. Implement raise_exception_err_env() to handle dynamic CPUState. Move the function declarations to cpu.h since they can be used outside of op_helper.c context. LM32, s390x, UniCore32: remove unused cpu_halted(), regs_to_env() and env_to_regs(). ARM: make raise_exception() static. Convert #include "exec.h" to #include "cpu.h" #include "dyngen-exec.h" and remove now unused target-*/exec.h. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-07-12spapr: use specific endian ld/st_physAlexander Graf
Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-06-26Remove exec-all.h include directivesBlue Swirl
Most exec-all.h include directives are now useless, remove them. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-05-20pSeries: Clean up write-only variablesDavid Gibson
A few pieces of the pSeries emulation code have variables which are set but never used, which causes warnings on gcc 4.6. This patch removes these instances. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-05-10Fix off-by-one error in sizing pSeries hcall tableDavid Gibson
The pSeries machine uses two tables to look up guest hcalls for emulation. One of these is exactly one entry too small to hold all the hcalls it needs to, leading to memory corruption. This patch fixes the bug, and while we're at it, make both tables 'static' since they're never used from other modules. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01Implement PAPR VPA functions for pSeries shared processor partitionsDavid Gibson
Shared-processor partitions are those where a CPU is time-sliced between partitions, rather than being permanently dedicated to a single partition. qemu emulated partitions, since they are just scheduled with the qemu user process, behave mostly like shared processor partitions. In order to better support shared processor partitions (splpar), PAPR defines the "VPA" (Virtual Processor Area), a shared memory communication channel between the hypervisor and partitions. There are also two additional shared memory communication areas for specialized purposes associated with the VPA. A VPA is not essential for operating an splpar, though it can be necessary for obtaining accurate performance measurements in the presence of runtime partition switching. Most importantly, however, the VPA is a prerequisite for PAPR's H_CEDE, hypercall, which allows a partition OS to give up it's shared processor timeslices to other partitions when idle. This patch implements the VPA and H_CEDE hypercalls in qemu. We don't implement any of the more advanced statistics which can be communicated through the VPA. However, this is enough to make normal pSeries kernels do an effective power-save idle on an emulated pSeries, significantly reducing the host load of a qemu emulated pSeries running an idle guest OS. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01Implement assorted pSeries hcalls and RTAS methodsDavid Gibson
This patch adds several small utility hypercalls and RTAS methods to the pSeries platform emulation. Specifically: * 'display-character' rtas call This just prints a character to the console, it's occasionally used for early debug of the OS. The support includes a hack to make this RTAS call respond on the normal token value present on real hardware, since some early debugging tools just assume this value without checking the device tree. * 'get-time-of-day' rtas call This one just takes the host real time, converts to the PAPR described format and returns it to the guest. * 'power-off' rtas call This one shuts down the emulated system. * H_DABR hypercall On pSeries, the DABR debug register is usually a hypervisor resource and virtualized through this hypercall. If the hypercall is not present, Linux will under some circumstances attempt to manipulate the DABR directly which will fail on this emulated machine. This stub implementation is enough to stop that behaviour, although it doesn't actually implement the requested DABR operations as yet. Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01Implement hcall based RTAS for pSeries machinesDavid Gibson
On pSeries machines, operating systems can instantiate "RTAS" (Run-Time Abstraction Services), a runtime component of the firmware which implements a number of low-level, infrequently used operations. On logical partitions under a hypervisor, many of the RTAS functions require hypervisor privilege. For simplicity, therefore, hypervisor systems typically implement the in-partition RTAS as just a tiny wrapper around a hypercall which actually implements the various RTAS functions. This patch implements such a hypercall based RTAS for our emulated pSeries machine. A tiny in-partition "firmware" calls a new hypercall, which looks up available RTAS services in a table. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01Virtual hash page table handling on pSeries machineDavid Gibson
On pSeries logical partitions, excepting the old POWER4-style full system partitions, the guest does not have direct access to the hardware page table. Instead, the pagetable exists in hypervisor memory, and the guest must manipulate it with hypercalls. However, our current pSeries emulation more closely resembles the old style where the guest must set up and handle the pagetables itself. This patch converts it to act like a modern partition. This involves two things: first, the hash translation path is modified to permit the has table to be stored externally to the emulated machine's RAM. The pSeries machine init code configures the CPUs to use this mode. Secondly, we emulate the PAPR hypercalls for manipulating the external hashed page table. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-04-01Start implementing pSeries logical partition machineDavid Gibson
This patch adds a "pseries" machine to qemu. This aims to emulate a logical partition on an IBM pSeries machine, compliant to the "PowerPC Architecture Platform Requirements" (PAPR) document. This initial version is quite limited, it implements a basic machine and PAPR hypercall emulation. So far only one hypercall is present - H_PUT_TERM_CHAR - so that a (write-only) console is available. Multiple CPUs are permitted, with SMP entry handled kexec() style. The machine so far more resembles an old POWER4 style "full system partition" rather than a modern LPAR, in that the guest manages the page tables directly, rather than via hypercalls. The machine requires qemu to be configured with --enable-fdt. The machine can (so far) only be booted with -kernel - i.e. no partition firmware is provided. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Alexander Graf <agraf@suse.de>