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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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3a167beac0
This patch add a new callback kvmppc_ops. This will help us in enabling both HV and PR KVM together in the same kernel. The actual change to enable them together is done in the later patch in the series. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> [agraf: squash in booke changes] Signed-off-by: Alexander Graf <agraf@suse.de>
195 lines
4.6 KiB
C
195 lines
4.6 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright IBM Corp. 2008
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*
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* Authors: Hollis Blanchard <hollisb@us.ibm.com>
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*/
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#include <asm/kvm_ppc.h>
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#include <asm/dcr.h>
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#include <asm/dcr-regs.h>
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#include <asm/disassemble.h>
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#include <asm/kvm_44x.h>
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#include "timing.h"
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#include "booke.h"
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#include "44x_tlb.h"
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#define XOP_MFDCRX 259
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#define XOP_MFDCR 323
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#define XOP_MTDCRX 387
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#define XOP_MTDCR 451
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#define XOP_TLBSX 914
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#define XOP_ICCCI 966
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#define XOP_TLBWE 978
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static int emulate_mtdcr(struct kvm_vcpu *vcpu, int rs, int dcrn)
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{
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/* emulate some access in kernel */
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switch (dcrn) {
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case DCRN_CPR0_CONFIG_ADDR:
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vcpu->arch.cpr0_cfgaddr = kvmppc_get_gpr(vcpu, rs);
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return EMULATE_DONE;
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default:
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vcpu->run->dcr.dcrn = dcrn;
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vcpu->run->dcr.data = kvmppc_get_gpr(vcpu, rs);
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vcpu->run->dcr.is_write = 1;
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vcpu->arch.dcr_is_write = 1;
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vcpu->arch.dcr_needed = 1;
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kvmppc_account_exit(vcpu, DCR_EXITS);
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return EMULATE_DO_DCR;
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}
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}
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static int emulate_mfdcr(struct kvm_vcpu *vcpu, int rt, int dcrn)
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{
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/* The guest may access CPR0 registers to determine the timebase
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* frequency, and it must know the real host frequency because it
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* can directly access the timebase registers.
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*
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* It would be possible to emulate those accesses in userspace,
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* but userspace can really only figure out the end frequency.
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* We could decompose that into the factors that compute it, but
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* that's tricky math, and it's easier to just report the real
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* CPR0 values.
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*/
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switch (dcrn) {
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case DCRN_CPR0_CONFIG_ADDR:
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kvmppc_set_gpr(vcpu, rt, vcpu->arch.cpr0_cfgaddr);
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break;
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case DCRN_CPR0_CONFIG_DATA:
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local_irq_disable();
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mtdcr(DCRN_CPR0_CONFIG_ADDR,
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vcpu->arch.cpr0_cfgaddr);
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kvmppc_set_gpr(vcpu, rt,
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mfdcr(DCRN_CPR0_CONFIG_DATA));
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local_irq_enable();
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break;
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default:
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vcpu->run->dcr.dcrn = dcrn;
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vcpu->run->dcr.data = 0;
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vcpu->run->dcr.is_write = 0;
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vcpu->arch.dcr_is_write = 0;
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vcpu->arch.io_gpr = rt;
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vcpu->arch.dcr_needed = 1;
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kvmppc_account_exit(vcpu, DCR_EXITS);
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return EMULATE_DO_DCR;
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}
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return EMULATE_DONE;
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}
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int kvmppc_core_emulate_op_44x(struct kvm_run *run, struct kvm_vcpu *vcpu,
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unsigned int inst, int *advance)
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{
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int emulated = EMULATE_DONE;
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int dcrn = get_dcrn(inst);
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int ra = get_ra(inst);
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int rb = get_rb(inst);
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int rc = get_rc(inst);
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int rs = get_rs(inst);
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int rt = get_rt(inst);
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int ws = get_ws(inst);
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switch (get_op(inst)) {
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case 31:
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switch (get_xop(inst)) {
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case XOP_MFDCR:
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emulated = emulate_mfdcr(vcpu, rt, dcrn);
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break;
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case XOP_MFDCRX:
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emulated = emulate_mfdcr(vcpu, rt,
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kvmppc_get_gpr(vcpu, ra));
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break;
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case XOP_MTDCR:
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emulated = emulate_mtdcr(vcpu, rs, dcrn);
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break;
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case XOP_MTDCRX:
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emulated = emulate_mtdcr(vcpu, rs,
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kvmppc_get_gpr(vcpu, ra));
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break;
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case XOP_TLBWE:
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emulated = kvmppc_44x_emul_tlbwe(vcpu, ra, rs, ws);
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break;
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case XOP_TLBSX:
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emulated = kvmppc_44x_emul_tlbsx(vcpu, rt, ra, rb, rc);
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break;
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case XOP_ICCCI:
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break;
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default:
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emulated = EMULATE_FAIL;
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}
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break;
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default:
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emulated = EMULATE_FAIL;
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}
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if (emulated == EMULATE_FAIL)
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emulated = kvmppc_booke_emulate_op(run, vcpu, inst, advance);
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return emulated;
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}
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int kvmppc_core_emulate_mtspr_44x(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
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{
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int emulated = EMULATE_DONE;
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switch (sprn) {
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case SPRN_PID:
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kvmppc_set_pid(vcpu, spr_val); break;
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case SPRN_MMUCR:
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vcpu->arch.mmucr = spr_val; break;
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case SPRN_CCR0:
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vcpu->arch.ccr0 = spr_val; break;
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case SPRN_CCR1:
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vcpu->arch.ccr1 = spr_val; break;
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default:
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emulated = kvmppc_booke_emulate_mtspr(vcpu, sprn, spr_val);
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}
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return emulated;
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}
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int kvmppc_core_emulate_mfspr_44x(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
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{
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int emulated = EMULATE_DONE;
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switch (sprn) {
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case SPRN_PID:
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*spr_val = vcpu->arch.pid; break;
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case SPRN_MMUCR:
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*spr_val = vcpu->arch.mmucr; break;
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case SPRN_CCR0:
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*spr_val = vcpu->arch.ccr0; break;
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case SPRN_CCR1:
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*spr_val = vcpu->arch.ccr1; break;
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default:
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emulated = kvmppc_booke_emulate_mfspr(vcpu, sprn, spr_val);
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}
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return emulated;
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}
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