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target/arm: Add ID_AA64MMFR2_EL1 

Add definitions for all of the fields, up to ARMv8.5.
Convert the existing RESERVED register to a full register.
Query KVM for the value of the register for the host.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200208125816.14954-18-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2020-02-08 12:58:13 +00:00 committed by Peter Maydell
parent e0fe7309a7
commit 64761e10af
3 changed files with 21 additions and 2 deletions
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17
target/arm/cpu.h
View File

@ -871,6 +871,7 @@ struct ARMCPU {
uint64_t id_aa64pfr1;
uint64_t id_aa64mmfr0;
uint64_t id_aa64mmfr1;
uint64_t id_aa64mmfr2;
} isar;
uint32_t midr;
uint32_t revidr;
@ -1803,6 +1804,22 @@ FIELD(ID_AA64MMFR1, PAN, 20, 4)
FIELD(ID_AA64MMFR1, SPECSEI, 24, 4)
FIELD(ID_AA64MMFR1, XNX, 28, 4)
FIELD(ID_AA64MMFR2, CNP, 0, 4)
FIELD(ID_AA64MMFR2, UAO, 4, 4)
FIELD(ID_AA64MMFR2, LSM, 8, 4)
FIELD(ID_AA64MMFR2, IESB, 12, 4)
FIELD(ID_AA64MMFR2, VARANGE, 16, 4)
FIELD(ID_AA64MMFR2, CCIDX, 20, 4)
FIELD(ID_AA64MMFR2, NV, 24, 4)
FIELD(ID_AA64MMFR2, ST, 28, 4)
FIELD(ID_AA64MMFR2, AT, 32, 4)
FIELD(ID_AA64MMFR2, IDS, 36, 4)
FIELD(ID_AA64MMFR2, FWB, 40, 4)
FIELD(ID_AA64MMFR2, TTL, 48, 4)
FIELD(ID_AA64MMFR2, BBM, 52, 4)
FIELD(ID_AA64MMFR2, EVT, 56, 4)
FIELD(ID_AA64MMFR2, E0PD, 60, 4)
FIELD(ID_DFR0, COPDBG, 0, 4)
FIELD(ID_DFR0, COPSDBG, 4, 4)
FIELD(ID_DFR0, MMAPDBG, 8, 4)

4
target/arm/helper.c
View File

@ -7073,11 +7073,11 @@ void register_cp_regs_for_features(ARMCPU *cpu)
.access = PL1_R, .type = ARM_CP_CONST,
.accessfn = access_aa64_tid3,
.resetvalue = cpu->isar.id_aa64mmfr1 },
{ .name = "ID_AA64MMFR2_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
{ .name = "ID_AA64MMFR2_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 7, .opc2 = 2,
.access = PL1_R, .type = ARM_CP_CONST,
.accessfn = access_aa64_tid3,
.resetvalue = 0 },
.resetvalue = cpu->isar.id_aa64mmfr2 },
{ .name = "ID_AA64MMFR3_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 7, .opc2 = 3,
.access = PL1_R, .type = ARM_CP_CONST,

2
target/arm/kvm64.c
View File

@ -549,6 +549,8 @@ bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf)
ARM64_SYS_REG(3, 0, 0, 7, 0));
err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64mmfr1,
ARM64_SYS_REG(3, 0, 0, 7, 1));
err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64mmfr2,
ARM64_SYS_REG(3, 0, 0, 7, 2));
/*
* Note that if AArch32 support is not present in the host,