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MIPS: KVM: Drop unused host_cp0_entryhi

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The host EntryHi in the KVM VCPU context is virtually unused. It gets
stored on exceptions, but only ever used in a kvm_debug() when a TLB
miss occurs.

Drop it entirely, removing that information from the kvm_debug output.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
James Hogan 2016-06-09 14:19:05 +01:00 committed by Paolo Bonzini
parent d40dd9e8da
commit e4e94c0fc8
4 changed files with 2 additions and 8 deletions
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1
arch/mips/include/asm/kvm_host.h
View File

@ -346,7 +346,6 @@ struct kvm_vcpu_arch {
unsigned long host_cp0_badvaddr;
unsigned long host_cp0_cause;
unsigned long host_cp0_epc;
unsigned long host_cp0_entryhi;
/* GPRS */
unsigned long gprs[32];

1
arch/mips/kernel/asm-offsets.c
View File

@ -364,7 +364,6 @@ void output_kvm_defines(void)
OFFSET(VCPU_HOST_CP0_BADVADDR, kvm_vcpu_arch, host_cp0_badvaddr);
OFFSET(VCPU_HOST_CP0_CAUSE, kvm_vcpu_arch, host_cp0_cause);
OFFSET(VCPU_HOST_EPC, kvm_vcpu_arch, host_cp0_epc);
OFFSET(VCPU_HOST_ENTRYHI, kvm_vcpu_arch, host_cp0_entryhi);
OFFSET(VCPU_R0, kvm_vcpu_arch, gprs[0]);
OFFSET(VCPU_R1, kvm_vcpu_arch, gprs[1]);

5
arch/mips/kvm/emulate.c
View File

@ -1634,7 +1634,6 @@ enum emulation_result kvm_mips_emulate_cache(uint32_t inst, uint32_t *opc,
(cop0) & KVM_ENTRYHI_ASID));
if (index < 0) {
vcpu->arch.host_cp0_entryhi = (va & VPN2_MASK);
vcpu->arch.host_cp0_badvaddr = va;
vcpu->arch.pc = curr_pc;
er = kvm_mips_emulate_tlbmiss_ld(cause, NULL, run,
@ -2576,8 +2575,8 @@ enum emulation_result kvm_mips_handle_tlbmiss(unsigned long cause,
unsigned long va = vcpu->arch.host_cp0_badvaddr;
int index;
kvm_debug("kvm_mips_handle_tlbmiss: badvaddr: %#lx, entryhi: %#lx\n",
vcpu->arch.host_cp0_badvaddr, vcpu->arch.host_cp0_entryhi);
kvm_debug("kvm_mips_handle_tlbmiss: badvaddr: %#lx\n",
vcpu->arch.host_cp0_badvaddr);
/*
* KVM would not have got the exception if this entry was valid in the

3
arch/mips/kvm/locore.S
View File

@ -308,9 +308,6 @@ NESTED (MIPSX(GuestException), CALLFRAME_SIZ, ra)
mfc0 k0, CP0_CAUSE
LONG_S k0, VCPU_HOST_CP0_CAUSE(k1)
mfc0 k0, CP0_ENTRYHI
LONG_S k0, VCPU_HOST_ENTRYHI(k1)
/* Now restore the host state just enough to run the handlers */
/* Switch EBASE to the one used by Linux */