From b698e9cfd282b228b36d426b75facb83e07a1072 Mon Sep 17 00:00:00 2001 From: "Edgar E. Iglesias" Date: Mon, 14 Sep 2015 14:39:50 +0100 Subject: [PATCH] target-arm: Add VTTBR_EL2 Signed-off-by: Edgar E. Iglesias Message-id: 1442135278-25281-4-git-send-email-edgar.iglesias@gmail.com Reviewed-by: Peter Maydell Signed-off-by: Peter Maydell --- target-arm/cpu.h | 1 + target-arm/helper.c | 34 ++++++++++++++++++++++++++++++++-- 2 files changed, 33 insertions(+), 2 deletions(-) diff --git a/target-arm/cpu.h b/target-arm/cpu.h index f91b7933b6..96b8f2afba 100644 --- a/target-arm/cpu.h +++ b/target-arm/cpu.h @@ -222,6 +222,7 @@ typedef struct CPUARMState { }; uint64_t ttbr1_el[4]; }; + uint64_t vttbr_el2; /* Virtualization Translation Table Base. */ /* MMU translation table base control. */ TCR tcr_el[4]; TCR vtcr_el2; /* Virtualization Translation Control. */ diff --git a/target-arm/helper.c b/target-arm/helper.c index b250ed0e61..d84f3c94f7 100644 --- a/target-arm/helper.c +++ b/target-arm/helper.c @@ -2213,6 +2213,20 @@ static void vmsa_ttbr_write(CPUARMState *env, const ARMCPRegInfo *ri, raw_write(env, ri, value); } +static void vttbr_write(CPUARMState *env, const ARMCPRegInfo *ri, + uint64_t value) +{ + ARMCPU *cpu = arm_env_get_cpu(env); + CPUState *cs = CPU(cpu); + + /* Accesses to VTTBR may change the VMID so we must flush the TLB. */ + if (raw_read(env, ri) != value) { + tlb_flush_by_mmuidx(cs, ARMMMUIdx_S12NSE1, ARMMMUIdx_S12NSE0, + ARMMMUIdx_S2NS, -1); + raw_write(env, ri, value); + } +} + static const ARMCPRegInfo vmsa_pmsa_cp_reginfo[] = { { .name = "DFSR", .cp = 15, .crn = 5, .crm = 0, .opc1 = 0, .opc2 = 0, .access = PL1_RW, .type = ARM_CP_ALIAS, @@ -3144,6 +3158,13 @@ static const ARMCPRegInfo el3_no_el2_cp_reginfo[] = { .opc0 = 3, .opc1 = 4, .crn = 2, .crm = 1, .opc2 = 2, .access = PL2_RW, .accessfn = access_el3_aa32ns_aa64any, .type = ARM_CP_CONST, .resetvalue = 0 }, + { .name = "VTTBR", .state = ARM_CP_STATE_AA32, + .cp = 15, .opc1 = 6, .crm = 2, + .access = PL2_RW, .accessfn = access_el3_aa32ns, + .type = ARM_CP_CONST | ARM_CP_64BIT, .resetvalue = 0 }, + { .name = "VTTBR_EL2", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 4, .crn = 2, .crm = 1, .opc2 = 0, + .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 }, { .name = "SCTLR_EL2", .state = ARM_CP_STATE_BOTH, .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 0, .opc2 = 0, .access = PL2_RW, .type = ARM_CP_CONST, .resetvalue = 0 }, @@ -3286,6 +3307,16 @@ static const ARMCPRegInfo el2_cp_reginfo[] = { .opc0 = 3, .opc1 = 4, .crn = 2, .crm = 1, .opc2 = 2, .access = PL2_RW, .type = ARM_CP_ALIAS, .fieldoffset = offsetof(CPUARMState, cp15.vtcr_el2) }, + { .name = "VTTBR", .state = ARM_CP_STATE_AA32, + .cp = 15, .opc1 = 6, .crm = 2, + .type = ARM_CP_64BIT | ARM_CP_ALIAS, + .access = PL2_RW, .accessfn = access_el3_aa32ns, + .fieldoffset = offsetof(CPUARMState, cp15.vttbr_el2), + .writefn = vttbr_write }, + { .name = "VTTBR_EL2", .state = ARM_CP_STATE_AA64, + .opc0 = 3, .opc1 = 4, .crn = 2, .crm = 1, .opc2 = 0, + .access = PL2_RW, .writefn = vttbr_write, + .fieldoffset = offsetof(CPUARMState, cp15.vttbr_el2) }, { .name = "SCTLR_EL2", .state = ARM_CP_STATE_BOTH, .opc0 = 3, .opc1 = 4, .crn = 1, .crm = 0, .opc2 = 0, .access = PL2_RW, .raw_writefn = raw_write, .writefn = sctlr_write, @@ -5791,8 +5822,7 @@ static inline uint64_t regime_ttbr(CPUARMState *env, ARMMMUIdx mmu_idx, int ttbrn) { if (mmu_idx == ARMMMUIdx_S2NS) { - /* TODO: return VTTBR_EL2 */ - g_assert_not_reached(); + return env->cp15.vttbr_el2; } if (ttbrn == 0) { return env->cp15.ttbr0_el[regime_el(env, mmu_idx)];