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hw/mips: Add API to convert KVM guest KSEG0 <-> GPA 

Add API for converting physical addresses to KVM guest KSEG0 addresses,
and fix the existing API for converting KSEG0 addresses to physical
addresses to work in the KVM case. Both have the same sized KSEG0, so
it's just a case of fixing the mask.

In KVM trap and emulate mode both the guest kernel and guest userspace
execute in useg:
    Guest User address space:   0x00000000..0x3fffffff
    Guest Kernel Unmapped:      0x40000000..0x5fffffff
    Guest Kernel Mapped:        0x60000000..0x7fffffff

Signed-off-by: Sanjay Lal <sanjayl@kymasys.com>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sanjay Lal 2014-06-17 23:10:28 +01:00 committed by Paolo Bonzini
parent 353a243e22
commit 253fffe725
2 changed files with 8 additions and 1 deletions
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7
hw/mips/addr.c
View File

@ -25,10 +25,15 @@
uint64_t cpu_mips_kseg0_to_phys(void *opaque, uint64_t addr)
{
return addr & 0x7fffffffll;
return addr & 0x1fffffffll;
}
uint64_t cpu_mips_phys_to_kseg0(void *opaque, uint64_t addr)
{
return addr | ~0x7fffffffll;
}
uint64_t cpu_mips_kvm_um_phys_to_kseg0(void *opaque, uint64_t addr)
{
return addr | 0x40000000ll;
}

2
include/hw/mips/cpudevs.h
View File

@ -5,6 +5,8 @@
/* mips_addr.c */
uint64_t cpu_mips_kseg0_to_phys(void *opaque, uint64_t addr);
uint64_t cpu_mips_phys_to_kseg0(void *opaque, uint64_t addr);
uint64_t cpu_mips_kvm_um_phys_to_kseg0(void *opaque, uint64_t addr);
/* mips_int.c */
void cpu_mips_irq_init_cpu(CPUMIPSState *env);