Commit 539c6e73 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt Committed by David Gibson
Browse files

target/ppc: Basic POWER9 bare-metal radix MMU support 



No guest support yet

Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarCédric Le Goater <clg@kaod.org>
Message-Id: <20190215170029.15641-13-clg@kaod.org>
Signed-off-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
parent 3367c62f

target/ppc/mmu-radix64.c

+69 −12
Original line number Diff line number Diff line
@@ -31,10 +31,26 @@ 
static bool ppc_radix64_get_fully_qualified_addr(CPUPPCState *env, vaddr eaddr,

                                                 uint64_t *lpid, uint64_t *pid)

{

    /* We don't have HV support yet and shouldn't get here with it set anyway */

    assert(!msr_hv);



    if (!msr_hv) { /* !MSR[HV] -> Guest */

    if (msr_hv) { /* MSR[HV] -> Hypervisor/bare metal */

        switch (eaddr & R_EADDR_QUADRANT) {

        case R_EADDR_QUADRANT0:

            *lpid = 0;

            *pid = env->spr[SPR_BOOKS_PID];

            break;

        case R_EADDR_QUADRANT1:

            *lpid = env->spr[SPR_LPIDR];

            *pid = env->spr[SPR_BOOKS_PID];

            break;

        case R_EADDR_QUADRANT2:

            *lpid = env->spr[SPR_LPIDR];

            *pid = 0;

            break;

        case R_EADDR_QUADRANT3:

            *lpid = 0;

            *pid = 0;

            break;

        }

    } else {  /* !MSR[HV] -> Guest */

        switch (eaddr & R_EADDR_QUADRANT) {

        case R_EADDR_QUADRANT0: /* Guest application */

            *lpid = env->spr[SPR_LPIDR];
@@ -186,21 +202,32 @@ static uint64_t ppc_radix64_walk_tree(PowerPCCPU *cpu, vaddr eaddr, 
                                 raddr, psize, fault_cause, pte_addr);

}



static bool validate_pate(PowerPCCPU *cpu, uint64_t lpid, ppc_v3_pate_t *pate)

{

    CPUPPCState *env = &cpu->env;



    if (!(pate->dw0 & PATE0_HR)) {

        return false;

    }

    if (lpid == 0 && !msr_hv) {

        return false;

    }

    /* More checks ... */

    return true;

}



int ppc_radix64_handle_mmu_fault(PowerPCCPU *cpu, vaddr eaddr, int rwx,

                                 int mmu_idx)

{

    CPUState *cs = CPU(cpu);

    CPUPPCState *env = &cpu->env;

    PPCVirtualHypervisorClass *vhc =

        PPC_VIRTUAL_HYPERVISOR_GET_CLASS(cpu->vhyp);

    PPCVirtualHypervisorClass *vhc;

    hwaddr raddr, pte_addr;

    uint64_t lpid = 0, pid = 0, offset, size, prtbe0, pte;

    int page_size, prot, fault_cause = 0;

    ppc_v3_pate_t pate;



    assert((rwx == 0) || (rwx == 1) || (rwx == 2));

    assert(!msr_hv); /* For now there is no Radix PowerNV Support */

    assert(cpu->vhyp);

    assert(ppc64_use_proc_tbl(cpu));



    /* Real Mode Access */
@@ -221,7 +248,23 @@ int ppc_radix64_handle_mmu_fault(PowerPCCPU *cpu, vaddr eaddr, int rwx, 
    }



    /* Get Process Table */

    if (cpu->vhyp) {

        vhc = PPC_VIRTUAL_HYPERVISOR_GET_CLASS(cpu->vhyp);

        vhc->get_pate(cpu->vhyp, &pate);

    } else {

        if (!ppc64_v3_get_pate(cpu, lpid, &pate)) {

            ppc_radix64_raise_si(cpu, rwx, eaddr, DSISR_NOPTE);

            return 1;

        }

        if (!validate_pate(cpu, lpid, &pate)) {

            ppc_radix64_raise_si(cpu, rwx, eaddr, DSISR_R_BADCONFIG);

        }

        /* We don't support guest mode yet */

        if (lpid != 0) {

            error_report("PowerNV guest support Unimplemented");

            exit(1);

       }

    }



    /* Index Process Table by PID to Find Corresponding Process Table Entry */

    offset = pid * sizeof(struct prtb_entry);
@@ -256,8 +299,7 @@ hwaddr ppc_radix64_get_phys_page_debug(PowerPCCPU *cpu, target_ulong eaddr) 
{

    CPUState *cs = CPU(cpu);

    CPUPPCState *env = &cpu->env;

    PPCVirtualHypervisorClass *vhc =

        PPC_VIRTUAL_HYPERVISOR_GET_CLASS(cpu->vhyp);

    PPCVirtualHypervisorClass *vhc;

    hwaddr raddr, pte_addr;

    uint64_t lpid = 0, pid = 0, offset, size, prtbe0, pte;

    int page_size, fault_cause = 0;
@@ -275,7 +317,22 @@ hwaddr ppc_radix64_get_phys_page_debug(PowerPCCPU *cpu, target_ulong eaddr) 
    }



    /* Get Process Table */

    if (cpu->vhyp) {

        vhc = PPC_VIRTUAL_HYPERVISOR_GET_CLASS(cpu->vhyp);

        vhc->get_pate(cpu->vhyp, &pate);

    } else {

        if (!ppc64_v3_get_pate(cpu, lpid, &pate)) {

            return -1;

        }

        if (!validate_pate(cpu, lpid, &pate)) {

            return -1;

        }

        /* We don't support guest mode yet */

        if (lpid != 0) {

            error_report("PowerNV guest support Unimplemented");

            exit(1);

       }

    }



    /* Index Process Table by PID to Find Corresponding Process Table Entry */

    offset = pid * sizeof(struct prtb_entry);