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vbox: save/restore fpu state of EMT thread

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This commit is contained in:
Alexander Boettcher 2014-06-16 12:42:57 +02:00 committed by Norman Feske
parent 149f199735
commit f0c7eccdc7
2 changed files with 17 additions and 5 deletions
repos/ports/src/virtualbox
main.cc
nova
vcpu.h

10
repos/ports/src/virtualbox/main.cc

@ -21,12 +21,18 @@
/* libc includes */
#include <stdio.h>
/* libc memory allocator */
#include <libc_mem_alloc.h>
/* Virtualbox includes of VBoxBFE */
#include <iprt/initterm.h>
#include <iprt/err.h>
void *operator new (Genode::size_t size) {
return Genode::env()->heap()->alloc(size); }
void *operator new (Genode::size_t size)
{
static Libc::Mem_alloc_impl heap(Genode::env()->rm_session());
return heap.alloc(size, 0x10);
}
void *operator new [] (Genode::size_t size) {
return Genode::env()->heap()->alloc(size); }

12
repos/ports/src/virtualbox/nova/vcpu.h

@ -73,6 +73,8 @@ class Vcpu_handler : public Vmm::Vcpu_dispatcher<pthread>
{
private:
X86FXSTATE _fpu_state __attribute__((aligned(0x10)));
Genode::Cap_connection _cap_connection;
Vmm::Vcpu_other_pd _vcpu;
@ -670,9 +672,11 @@ class Vcpu_handler : public Vmm::Vcpu_dispatcher<pthread>
*/
VMCPU_SET_STATE(pVCpu, VMCPUSTATE_STARTED_EXEC);
/* write FPU state from pCtx to vCPU */
/* save current FPU state */
fpu_save(reinterpret_cast<char *>(&_fpu_state));
/* write FPU state from pCtx to FPU registers */
fpu_load(reinterpret_cast<char *>(&pCtx->fpu));
/* tell kernel to transfer current fpu registers to vCPU */
utcb->mtd |= Mtd::FPU;
_current_vm = pVM;
@ -686,8 +690,10 @@ class Vcpu_handler : public Vmm::Vcpu_dispatcher<pthread>
_current_vm = 0;
_current_vcpu = 0;
/* write FPU state of vCPU to pCtx */
/* write FPU state of vCPU (in current FPU registers) to pCtx */
fpu_save(reinterpret_cast<char *>(&pCtx->fpu));
/* load saved FPU state of EMT thread */
fpu_load(reinterpret_cast<char *>(&_fpu_state));
// CPUMSetChangedFlags(pVCpu, CPUM_CHANGED_GLOBAL_TLB_FLUSH);