From 545d6e2b5c1e5fd321792bce0ad136c3a192c37b Mon Sep 17 00:00:00 2001 From: Suraj Jitindar Singh Date: Tue, 2 May 2017 16:37:18 +1000 Subject: [PATCH] target/ppc: Enable RADIX mmu mode for pseries TCG guest Now that we have added all the infrastructure we can enable a pseries TCG guest to use radix. In order to do this we have to add the appropriate bits to the ibm,arch-vec-5-platform-support vector to represent that we support both hash and radix mmu models. A radix guest can now be booted in pseries tcg mode by specifying: -cpu POWER9 Note that we assume hash, that is we allocate a hpt, until a guest tells us otherwise via a H_REGISTER_PROCESS_TABLE call with radix specified - in which case we free the hpt. If we were right and the guest is hash then there's nothing for us to do. Signed-off-by: Suraj Jitindar Singh Reviewed-by: David Gibson Signed-off-by: David Gibson --- hw/ppc/spapr.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 80d12d005c..e2dc77c2c9 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -855,6 +855,8 @@ static void spapr_dt_rtas(sPAPRMachineState *spapr, void *fdt) * option vector 5: */ static void spapr_dt_ov5_platform_support(void *fdt, int chosen) { + PowerPCCPU *first_ppc_cpu = POWERPC_CPU(first_cpu); + char val[2 * 3] = { 24, 0x00, /* Hash/Radix, filled in below. */ 25, 0x00, /* Hash options: Segment Tables == no, GTSE == no. */ @@ -870,8 +872,13 @@ static void spapr_dt_ov5_platform_support(void *fdt, int chosen) val[1] = 0x00; /* Hash */ } } else { - /* TODO: TCG case, hash */ - val[1] = 0x00; + if (first_ppc_cpu->env.mmu_model & POWERPC_MMU_V3) { + /* V3 MMU supports both hash and radix (with dynamic switching) */ + val[1] = 0xC0; + } else { + /* Otherwise we can only do hash */ + val[1] = 0x00; + } } _FDT(fdt_setprop(fdt, chosen, "ibm,arch-vec-5-platform-support", val, sizeof(val))); @@ -2101,8 +2108,8 @@ static void ppc_spapr_init(MachineState *machine) } spapr_ovec_set(spapr->ov5, OV5_FORM1_AFFINITY); - if (kvmppc_has_cap_mmu_radix()) { - /* KVM always allows GTSE with radix... */ + if (!kvm_enabled() || kvmppc_has_cap_mmu_radix()) { + /* KVM and TCG always allow GTSE with radix... */ spapr_ovec_set(spapr->ov5, OV5_MMU_RADIX_GTSE); } /* ... but not with hash (currently). */