From: "Edgar E. Iglesias" <edgar.iglesias@gmail.com>
To: qemu-devel@nongnu.org, peter.maydell@linaro.org
Cc: edgar.iglesias@xilinx.com, serge.fdrv@gmail.com,
alex.bennee@linaro.org, agraf@suse.de
Subject: [Qemu-devel] [PATCH v2 6/8] target-arm: Add VPIDR_EL2
Date: Sun, 13 Sep 2015 11:07:56 +0200 [thread overview]
Message-ID: <1442135278-25281-7-git-send-email-edgar.iglesias@gmail.com> (raw)
In-Reply-To: <1442135278-25281-1-git-send-email-edgar.iglesias@gmail.com>
From: "Edgar E. Iglesias" <edgar.iglesias@xilinx.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
---
target-arm/cpu.h | 1 +
target-arm/helper.c | 42 +++++++++++++++++++++++++++++++++++++++++-
2 files changed, 42 insertions(+), 1 deletion(-)
diff --git a/target-arm/cpu.h b/target-arm/cpu.h
index c10e4ee..bef898f 100644
--- a/target-arm/cpu.h
+++ b/target-arm/cpu.h
@@ -385,6 +385,7 @@ typedef struct CPUARMState {
*/
uint64_t c15_ccnt;
uint64_t pmccfiltr_el0; /* Performance Monitor Filter Register */
+ uint64_t vpidr_el2; /* Virtualization Processor ID Register */
} cp15;
struct {
diff --git a/target-arm/helper.c b/target-arm/helper.c
index 6c67ce2..f151646 100644
--- a/target-arm/helper.c
+++ b/target-arm/helper.c
@@ -2445,6 +2445,18 @@ static const ARMCPRegInfo strongarm_cp_reginfo[] = {
REGINFO_SENTINEL
};
+static uint64_t midr_read(CPUARMState *env, const ARMCPRegInfo *ri)
+{
+ ARMCPU *cpu = arm_env_get_cpu(env);
+ unsigned int cur_el = arm_current_el(env);
+ bool secure = arm_is_secure(env);
+
+ if (arm_feature(&cpu->env, ARM_FEATURE_EL2) && !secure && cur_el == 1) {
+ return env->cp15.vpidr_el2;
+ }
+ return raw_read(env, ri);
+}
+
static uint64_t mpidr_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
ARMCPU *cpu = ARM_CPU(arm_env_get_cpu(env));
@@ -4121,6 +4133,19 @@ void register_cp_regs_for_features(ARMCPU *cpu)
define_arm_cp_regs(cpu, v8_cp_reginfo);
}
if (arm_feature(env, ARM_FEATURE_EL2)) {
+ ARMCPRegInfo vpidr_regs[] = {
+ { .name = "VPIDR", .state = ARM_CP_STATE_AA32,
+ .cp = 15, .opc1 = 4, .crn = 0, .crm = 0, .opc2 = 0,
+ .access = PL2_RW, .accessfn = access_el3_aa32ns,
+ .resetvalue = cpu->midr,
+ .fieldoffset = offsetof(CPUARMState, cp15.vpidr_el2) },
+ { .name = "VPIDR_EL2", .state = ARM_CP_STATE_AA64,
+ .opc0 = 3, .opc1 = 4, .crn = 0, .crm = 0, .opc2 = 0,
+ .access = PL2_RW, .resetvalue = cpu->midr,
+ .fieldoffset = offsetof(CPUARMState, cp15.vpidr_el2) },
+ REGINFO_SENTINEL
+ };
+ define_arm_cp_regs(cpu, vpidr_regs);
define_arm_cp_regs(cpu, el2_cp_reginfo);
/* RVBAR_EL2 is only implemented if EL2 is the highest EL */
if (!arm_feature(env, ARM_FEATURE_EL3)) {
@@ -4136,6 +4161,18 @@ void register_cp_regs_for_features(ARMCPU *cpu)
* register the no_el2 reginfos.
*/
if (arm_feature(env, ARM_FEATURE_EL3)) {
+ /* When EL3 exists but not EL2, VPIDR takes the value
+ * of MIDR_EL1.
+ */
+ ARMCPRegInfo vpidr_regs[] = {
+ { .name = "VPIDR_EL2", .state = ARM_CP_STATE_BOTH,
+ .opc0 = 3, .opc1 = 4, .crn = 0, .crm = 0, .opc2 = 0,
+ .access = PL2_RW, .accessfn = access_el3_aa32ns_aa64any,
+ .type = ARM_CP_CONST, .resetvalue = cpu->midr,
+ .fieldoffset = offsetof(CPUARMState, cp15.vpidr_el2) },
+ REGINFO_SENTINEL
+ };
+ define_arm_cp_regs(cpu, vpidr_regs);
define_arm_cp_regs(cpu, el3_no_el2_cp_reginfo);
}
}
@@ -4213,6 +4250,7 @@ void register_cp_regs_for_features(ARMCPU *cpu)
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = CP_ANY,
.access = PL1_R, .resetvalue = cpu->midr,
.writefn = arm_cp_write_ignore, .raw_writefn = raw_write,
+ .readfn = midr_read,
.fieldoffset = offsetof(CPUARMState, cp15.c0_cpuid),
.type = ARM_CP_OVERRIDE },
/* crn = 0 op1 = 0 crm = 3..7 : currently unassigned; we RAZ. */
@@ -4236,7 +4274,9 @@ void register_cp_regs_for_features(ARMCPU *cpu)
ARMCPRegInfo id_v8_midr_cp_reginfo[] = {
{ .name = "MIDR_EL1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 0, .crm = 0, .opc2 = 0,
- .access = PL1_R, .type = ARM_CP_CONST, .resetvalue = cpu->midr },
+ .access = PL1_R, .type = ARM_CP_NO_RAW, .resetvalue = cpu->midr,
+ .fieldoffset = offsetof(CPUARMState, cp15.c0_cpuid),
+ .readfn = midr_read },
/* crn = 0 op1 = 0 crm = 0 op2 = 4,7 : AArch32 aliases of MIDR */
{ .name = "MIDR", .type = ARM_CP_ALIAS | ARM_CP_CONST,
.cp = 15, .crn = 0, .crm = 0, .opc1 = 0, .opc2 = 4,
--
1.9.1
next prev parent reply other threads:[~2015-09-13 9:08 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-13 9:07 [Qemu-devel] [PATCH v2 0/8] arm: Steps towards EL2 support round 4 Edgar E. Iglesias
2015-09-13 9:07 ` [Qemu-devel] [PATCH v2 1/8] hw/cpu/{a15mpcore, a9mpcore}: Handle missing has_el3 CPU props gracefully Edgar E. Iglesias
2015-09-14 2:13 ` Peter Crosthwaite
2015-09-13 9:07 ` [Qemu-devel] [PATCH v2 2/8] target-arm: Add VTCR_EL2 Edgar E. Iglesias
2015-09-13 9:07 ` [Qemu-devel] [PATCH v2 3/8] target-arm: Add VTTBR_EL2 Edgar E. Iglesias
2015-09-13 9:07 ` [Qemu-devel] [PATCH v2 4/8] target-arm: Suppress TBI for S2 translations Edgar E. Iglesias
2015-09-13 9:07 ` [Qemu-devel] [PATCH v2 5/8] target-arm: Suppress EPD for S2, EL2 and EL3 translations Edgar E. Iglesias
2015-09-13 9:07 ` Edgar E. Iglesias [this message]
2015-09-13 9:07 ` [Qemu-devel] [PATCH v2 7/8] target-arm: Break out mpidr_read_val() Edgar E. Iglesias
2015-09-13 9:07 ` [Qemu-devel] [PATCH v2 8/8] target-arm: Add VMPIDR_EL2 Edgar E. Iglesias
2015-09-14 13:34 ` [Qemu-devel] [PATCH v2 0/8] arm: Steps towards EL2 support round 4 Peter Maydell
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