diff mbox series

[v4,2/9] target/arm: Add ID_AA64ISAR2_EL1

Message ID 20230822042530.1026751-3-richard.henderson@linaro.org
State Superseded
Headers show
Series Implement Most ARMv8.3 Pointer Authentication Features | expand

Commit Message

Richard Henderson Aug. 22, 2023, 4:25 a.m. UTC 
From: Aaron Lindsay <aaron@os.amperecomputing.com>

Signed-off-by: Aaron Lindsay <aaron@os.amperecomputing.com>
[PMM: drop the HVF part of the patch and just comment that
 we need to do something when the register appears in that API]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---
 target/arm/cpu.h     | 1 +
 target/arm/helper.c  | 4 ++--
 target/arm/hvf/hvf.c | 1 +
 target/arm/kvm64.c   | 2 ++
 4 files changed, 6 insertions(+), 2 deletions(-)

Comments

Philippe Mathieu-Daudé Aug. 22, 2023, 6:14 a.m. UTC | #1 
On 22/8/23 06:25, Richard Henderson wrote:
> From: Aaron Lindsay <aaron@os.amperecomputing.com>
> 
> Signed-off-by: Aaron Lindsay <aaron@os.amperecomputing.com>
> [PMM: drop the HVF part of the patch and just comment that
>   we need to do something when the register appears in that API]
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
> ---
>   target/arm/cpu.h     | 1 +
>   target/arm/helper.c  | 4 ++--
>   target/arm/hvf/hvf.c | 1 +
>   target/arm/kvm64.c   | 2 ++
>   4 files changed, 6 insertions(+), 2 deletions(-)

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
diff mbox series

Patch

diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index 88e5accda6..fbdbf2df7f 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -1033,6 +1033,7 @@  struct ArchCPU {
         uint32_t dbgdevid1;
         uint64_t id_aa64isar0;
         uint64_t id_aa64isar1;
+        uint64_t id_aa64isar2;
         uint64_t id_aa64pfr0;
         uint64_t id_aa64pfr1;
         uint64_t id_aa64mmfr0;
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 50f61e42ca..3bae262b2f 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -8334,11 +8334,11 @@  void register_cp_regs_for_features(ARMCPU *cpu)
               .access = PL1_R, .type = ARM_CP_CONST,
               .accessfn = access_aa64_tid3,
               .resetvalue = cpu->isar.id_aa64isar1 },
-            { .name = "ID_AA64ISAR2_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
+            { .name = "ID_AA64ISAR2_EL1", .state = ARM_CP_STATE_AA64,
               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 6, .opc2 = 2,
               .access = PL1_R, .type = ARM_CP_CONST,
               .accessfn = access_aa64_tid3,
-              .resetvalue = 0 },
+              .resetvalue = cpu->isar.id_aa64isar2 },
             { .name = "ID_AA64ISAR3_EL1_RESERVED", .state = ARM_CP_STATE_AA64,
               .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 6, .opc2 = 3,
               .access = PL1_R, .type = ARM_CP_CONST,
diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
index 8fce64bbf6..c366f7f517 100644
--- a/target/arm/hvf/hvf.c
+++ b/target/arm/hvf/hvf.c
@@ -847,6 +847,7 @@  static bool hvf_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf)
         { HV_SYS_REG_ID_AA64DFR1_EL1, &host_isar.id_aa64dfr1 },
         { HV_SYS_REG_ID_AA64ISAR0_EL1, &host_isar.id_aa64isar0 },
         { HV_SYS_REG_ID_AA64ISAR1_EL1, &host_isar.id_aa64isar1 },
+        /* Add ID_AA64ISAR2_EL1 here when HVF supports it */
         { HV_SYS_REG_ID_AA64MMFR0_EL1, &host_isar.id_aa64mmfr0 },
         { HV_SYS_REG_ID_AA64MMFR1_EL1, &host_isar.id_aa64mmfr1 },
         { HV_SYS_REG_ID_AA64MMFR2_EL1, &host_isar.id_aa64mmfr2 },
diff --git a/target/arm/kvm64.c b/target/arm/kvm64.c
index 94bbd9661f..e2d05d7fc0 100644
--- a/target/arm/kvm64.c
+++ b/target/arm/kvm64.c
@@ -306,6 +306,8 @@  bool kvm_arm_get_host_cpu_features(ARMHostCPUFeatures *ahcf)
                               ARM64_SYS_REG(3, 0, 0, 6, 0));
         err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64isar1,
                               ARM64_SYS_REG(3, 0, 0, 6, 1));
+        err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64isar2,
+                              ARM64_SYS_REG(3, 0, 0, 6, 2));
         err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64mmfr0,
                               ARM64_SYS_REG(3, 0, 0, 7, 0));
         err |= read_sys_reg64(fdarray[2], &ahcf->isar.id_aa64mmfr1,