* [PATCH v2 01/36] target/arm: Introduce KVMID_AA64_SYS_REG64
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-23 10:40 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 02/36] target/arm: Move compare_u64 to helper.c Richard Henderson
` (35 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell
Allow us to create kvm ids directly, rather than going
through ENCODE_AA64_CP_REG + cpreg_to_kvm_id.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/kvm-consts.h | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/target/arm/kvm-consts.h b/target/arm/kvm-consts.h
index c44d23dbe7..fdb305eea1 100644
--- a/target/arm/kvm-consts.h
+++ b/target/arm/kvm-consts.h
@@ -180,4 +180,15 @@ MISMATCH_CHECK(CP_REG_ARM64_SYSREG_OP2_SHIFT, KVM_REG_ARM64_SYSREG_OP2_SHIFT);
#undef MISMATCH_CHECK
+#define KVMID_AA64_SYS_REG_(op0, op1, crn, crm, op2) \
+ (CP_REG_AA64_MASK | CP_REG_ARM64_SYSREG | \
+ ((op0) << CP_REG_ARM64_SYSREG_OP0_SHIFT) | \
+ ((op1) << CP_REG_ARM64_SYSREG_OP1_SHIFT) | \
+ ((crn) << CP_REG_ARM64_SYSREG_CRN_SHIFT) | \
+ ((crm) << CP_REG_ARM64_SYSREG_CRM_SHIFT) | \
+ ((op2) << CP_REG_ARM64_SYSREG_OP2_SHIFT))
+
+#define KVMID_AA64_SYS_REG64(op0, op1, crn, crm, op2) \
+ (KVMID_AA64_SYS_REG_(op0, op1, crn, crm, op2) | CP_REG_SIZE_U64)
+
#endif
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* [PATCH v2 02/36] target/arm: Move compare_u64 to helper.c
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
2025-09-16 14:22 ` [PATCH v2 01/36] target/arm: Introduce KVMID_AA64_SYS_REG64 Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-23 10:39 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 03/36] target/arm/hvf: Split out sysreg.c.inc Richard Henderson
` (34 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
We will use this function beyond kvm.c.
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/internals.h | 3 +++
target/arm/helper.c | 11 +++++++++++
target/arm/kvm.c | 11 -----------
3 files changed, 14 insertions(+), 11 deletions(-)
diff --git a/target/arm/internals.h b/target/arm/internals.h
index f5a1e75db3..41133df778 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -1999,4 +1999,7 @@ void vfp_clear_float_status_exc_flags(CPUARMState *env);
void vfp_set_fpcr_to_host(CPUARMState *env, uint32_t val, uint32_t mask);
bool arm_pan_enabled(CPUARMState *env);
+/* Compare uint64_t for qsort and bsearch. */
+int compare_u64(const void *a, const void *b);
+
#endif
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 19637e7301..df9e0c7bca 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -40,6 +40,17 @@
static void switch_mode(CPUARMState *env, int mode);
+int compare_u64(const void *a, const void *b)
+{
+ if (*(uint64_t *)a > *(uint64_t *)b) {
+ return 1;
+ }
+ if (*(uint64_t *)a < *(uint64_t *)b) {
+ return -1;
+ }
+ return 0;
+}
+
uint64_t raw_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
assert(ri->fieldoffset);
diff --git a/target/arm/kvm.c b/target/arm/kvm.c
index 6672344855..9e569eff65 100644
--- a/target/arm/kvm.c
+++ b/target/arm/kvm.c
@@ -718,17 +718,6 @@ void kvm_arm_register_device(MemoryRegion *mr, uint64_t devid, uint64_t group,
memory_region_ref(kd->mr);
}
-static int compare_u64(const void *a, const void *b)
-{
- if (*(uint64_t *)a > *(uint64_t *)b) {
- return 1;
- }
- if (*(uint64_t *)a < *(uint64_t *)b) {
- return -1;
- }
- return 0;
-}
-
/*
* cpreg_values are sorted in ascending order by KVM register ID
* (see kvm_arm_init_cpreg_list). This allows us to cheaply find
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 02/36] target/arm: Move compare_u64 to helper.c
2025-09-16 14:22 ` [PATCH v2 02/36] target/arm: Move compare_u64 to helper.c Richard Henderson
@ 2025-09-23 10:39 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-23 10:39 UTC (permalink / raw)
To: Richard Henderson, qemu-devel
Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
On 16/9/25 16:22, Richard Henderson wrote:
> We will use this function beyond kvm.c.
>
> Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/internals.h | 3 +++
> target/arm/helper.c | 11 +++++++++++
> target/arm/kvm.c | 11 -----------
> 3 files changed, 14 insertions(+), 11 deletions(-)
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 03/36] target/arm/hvf: Split out sysreg.c.inc
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
2025-09-16 14:22 ` [PATCH v2 01/36] target/arm: Introduce KVMID_AA64_SYS_REG64 Richard Henderson
2025-09-16 14:22 ` [PATCH v2 02/36] target/arm: Move compare_u64 to helper.c Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-23 10:38 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 04/36] target/arm/hvf: Reorder DEF_SYSREG arguments Richard Henderson
` (33 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
Move the list of supported sysregs to a reuseable file.
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/hvf/hvf.c | 147 ++----------------------------------
target/arm/hvf/sysreg.c.inc | 146 +++++++++++++++++++++++++++++++++++
2 files changed, 152 insertions(+), 141 deletions(-)
create mode 100644 target/arm/hvf/sysreg.c.inc
diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
index b77db99079..9f8e3083b4 100644
--- a/target/arm/hvf/hvf.c
+++ b/target/arm/hvf/hvf.c
@@ -403,150 +403,15 @@ struct hvf_sreg_match {
uint32_t cp_idx;
};
+#define DEF_SYSREG(HVF_ID, crn, crm, op0, op1, op2) \
+ { HVF_ID, HVF_SYSREG(crn, crm, op0, op1, op2) },
+
static struct hvf_sreg_match hvf_sreg_match[] = {
- { HV_SYS_REG_DBGBVR0_EL1, HVF_SYSREG(0, 0, 2, 0, 4) },
- { HV_SYS_REG_DBGBCR0_EL1, HVF_SYSREG(0, 0, 2, 0, 5) },
- { HV_SYS_REG_DBGWVR0_EL1, HVF_SYSREG(0, 0, 2, 0, 6) },
- { HV_SYS_REG_DBGWCR0_EL1, HVF_SYSREG(0, 0, 2, 0, 7) },
-
- { HV_SYS_REG_DBGBVR1_EL1, HVF_SYSREG(0, 1, 2, 0, 4) },
- { HV_SYS_REG_DBGBCR1_EL1, HVF_SYSREG(0, 1, 2, 0, 5) },
- { HV_SYS_REG_DBGWVR1_EL1, HVF_SYSREG(0, 1, 2, 0, 6) },
- { HV_SYS_REG_DBGWCR1_EL1, HVF_SYSREG(0, 1, 2, 0, 7) },
-
- { HV_SYS_REG_DBGBVR2_EL1, HVF_SYSREG(0, 2, 2, 0, 4) },
- { HV_SYS_REG_DBGBCR2_EL1, HVF_SYSREG(0, 2, 2, 0, 5) },
- { HV_SYS_REG_DBGWVR2_EL1, HVF_SYSREG(0, 2, 2, 0, 6) },
- { HV_SYS_REG_DBGWCR2_EL1, HVF_SYSREG(0, 2, 2, 0, 7) },
-
- { HV_SYS_REG_DBGBVR3_EL1, HVF_SYSREG(0, 3, 2, 0, 4) },
- { HV_SYS_REG_DBGBCR3_EL1, HVF_SYSREG(0, 3, 2, 0, 5) },
- { HV_SYS_REG_DBGWVR3_EL1, HVF_SYSREG(0, 3, 2, 0, 6) },
- { HV_SYS_REG_DBGWCR3_EL1, HVF_SYSREG(0, 3, 2, 0, 7) },
-
- { HV_SYS_REG_DBGBVR4_EL1, HVF_SYSREG(0, 4, 2, 0, 4) },
- { HV_SYS_REG_DBGBCR4_EL1, HVF_SYSREG(0, 4, 2, 0, 5) },
- { HV_SYS_REG_DBGWVR4_EL1, HVF_SYSREG(0, 4, 2, 0, 6) },
- { HV_SYS_REG_DBGWCR4_EL1, HVF_SYSREG(0, 4, 2, 0, 7) },
-
- { HV_SYS_REG_DBGBVR5_EL1, HVF_SYSREG(0, 5, 2, 0, 4) },
- { HV_SYS_REG_DBGBCR5_EL1, HVF_SYSREG(0, 5, 2, 0, 5) },
- { HV_SYS_REG_DBGWVR5_EL1, HVF_SYSREG(0, 5, 2, 0, 6) },
- { HV_SYS_REG_DBGWCR5_EL1, HVF_SYSREG(0, 5, 2, 0, 7) },
-
- { HV_SYS_REG_DBGBVR6_EL1, HVF_SYSREG(0, 6, 2, 0, 4) },
- { HV_SYS_REG_DBGBCR6_EL1, HVF_SYSREG(0, 6, 2, 0, 5) },
- { HV_SYS_REG_DBGWVR6_EL1, HVF_SYSREG(0, 6, 2, 0, 6) },
- { HV_SYS_REG_DBGWCR6_EL1, HVF_SYSREG(0, 6, 2, 0, 7) },
-
- { HV_SYS_REG_DBGBVR7_EL1, HVF_SYSREG(0, 7, 2, 0, 4) },
- { HV_SYS_REG_DBGBCR7_EL1, HVF_SYSREG(0, 7, 2, 0, 5) },
- { HV_SYS_REG_DBGWVR7_EL1, HVF_SYSREG(0, 7, 2, 0, 6) },
- { HV_SYS_REG_DBGWCR7_EL1, HVF_SYSREG(0, 7, 2, 0, 7) },
-
- { HV_SYS_REG_DBGBVR8_EL1, HVF_SYSREG(0, 8, 2, 0, 4) },
- { HV_SYS_REG_DBGBCR8_EL1, HVF_SYSREG(0, 8, 2, 0, 5) },
- { HV_SYS_REG_DBGWVR8_EL1, HVF_SYSREG(0, 8, 2, 0, 6) },
- { HV_SYS_REG_DBGWCR8_EL1, HVF_SYSREG(0, 8, 2, 0, 7) },
-
- { HV_SYS_REG_DBGBVR9_EL1, HVF_SYSREG(0, 9, 2, 0, 4) },
- { HV_SYS_REG_DBGBCR9_EL1, HVF_SYSREG(0, 9, 2, 0, 5) },
- { HV_SYS_REG_DBGWVR9_EL1, HVF_SYSREG(0, 9, 2, 0, 6) },
- { HV_SYS_REG_DBGWCR9_EL1, HVF_SYSREG(0, 9, 2, 0, 7) },
-
- { HV_SYS_REG_DBGBVR10_EL1, HVF_SYSREG(0, 10, 2, 0, 4) },
- { HV_SYS_REG_DBGBCR10_EL1, HVF_SYSREG(0, 10, 2, 0, 5) },
- { HV_SYS_REG_DBGWVR10_EL1, HVF_SYSREG(0, 10, 2, 0, 6) },
- { HV_SYS_REG_DBGWCR10_EL1, HVF_SYSREG(0, 10, 2, 0, 7) },
-
- { HV_SYS_REG_DBGBVR11_EL1, HVF_SYSREG(0, 11, 2, 0, 4) },
- { HV_SYS_REG_DBGBCR11_EL1, HVF_SYSREG(0, 11, 2, 0, 5) },
- { HV_SYS_REG_DBGWVR11_EL1, HVF_SYSREG(0, 11, 2, 0, 6) },
- { HV_SYS_REG_DBGWCR11_EL1, HVF_SYSREG(0, 11, 2, 0, 7) },
-
- { HV_SYS_REG_DBGBVR12_EL1, HVF_SYSREG(0, 12, 2, 0, 4) },
- { HV_SYS_REG_DBGBCR12_EL1, HVF_SYSREG(0, 12, 2, 0, 5) },
- { HV_SYS_REG_DBGWVR12_EL1, HVF_SYSREG(0, 12, 2, 0, 6) },
- { HV_SYS_REG_DBGWCR12_EL1, HVF_SYSREG(0, 12, 2, 0, 7) },
-
- { HV_SYS_REG_DBGBVR13_EL1, HVF_SYSREG(0, 13, 2, 0, 4) },
- { HV_SYS_REG_DBGBCR13_EL1, HVF_SYSREG(0, 13, 2, 0, 5) },
- { HV_SYS_REG_DBGWVR13_EL1, HVF_SYSREG(0, 13, 2, 0, 6) },
- { HV_SYS_REG_DBGWCR13_EL1, HVF_SYSREG(0, 13, 2, 0, 7) },
-
- { HV_SYS_REG_DBGBVR14_EL1, HVF_SYSREG(0, 14, 2, 0, 4) },
- { HV_SYS_REG_DBGBCR14_EL1, HVF_SYSREG(0, 14, 2, 0, 5) },
- { HV_SYS_REG_DBGWVR14_EL1, HVF_SYSREG(0, 14, 2, 0, 6) },
- { HV_SYS_REG_DBGWCR14_EL1, HVF_SYSREG(0, 14, 2, 0, 7) },
-
- { HV_SYS_REG_DBGBVR15_EL1, HVF_SYSREG(0, 15, 2, 0, 4) },
- { HV_SYS_REG_DBGBCR15_EL1, HVF_SYSREG(0, 15, 2, 0, 5) },
- { HV_SYS_REG_DBGWVR15_EL1, HVF_SYSREG(0, 15, 2, 0, 6) },
- { HV_SYS_REG_DBGWCR15_EL1, HVF_SYSREG(0, 15, 2, 0, 7) },
-
-#ifdef SYNC_NO_RAW_REGS
- /*
- * The registers below are manually synced on init because they are
- * marked as NO_RAW. We still list them to make number space sync easier.
- */
- { HV_SYS_REG_MDCCINT_EL1, HVF_SYSREG(0, 2, 2, 0, 0) },
- { HV_SYS_REG_MIDR_EL1, HVF_SYSREG(0, 0, 3, 0, 0) },
- { HV_SYS_REG_MPIDR_EL1, HVF_SYSREG(0, 0, 3, 0, 5) },
- { HV_SYS_REG_ID_AA64PFR0_EL1, HVF_SYSREG(0, 4, 3, 0, 0) },
-#endif
- { HV_SYS_REG_ID_AA64PFR1_EL1, HVF_SYSREG(0, 4, 3, 0, 1) },
- { HV_SYS_REG_ID_AA64DFR0_EL1, HVF_SYSREG(0, 5, 3, 0, 0) },
- { HV_SYS_REG_ID_AA64DFR1_EL1, HVF_SYSREG(0, 5, 3, 0, 1) },
- { HV_SYS_REG_ID_AA64ISAR0_EL1, HVF_SYSREG(0, 6, 3, 0, 0) },
- { HV_SYS_REG_ID_AA64ISAR1_EL1, HVF_SYSREG(0, 6, 3, 0, 1) },
-#ifdef SYNC_NO_MMFR0
- /* We keep the hardware MMFR0 around. HW limits are there anyway */
- { HV_SYS_REG_ID_AA64MMFR0_EL1, HVF_SYSREG(0, 7, 3, 0, 0) },
-#endif
- { HV_SYS_REG_ID_AA64MMFR1_EL1, HVF_SYSREG(0, 7, 3, 0, 1) },
- { HV_SYS_REG_ID_AA64MMFR2_EL1, HVF_SYSREG(0, 7, 3, 0, 2) },
- /* Add ID_AA64MMFR3_EL1 here when HVF supports it */
-
- { HV_SYS_REG_MDSCR_EL1, HVF_SYSREG(0, 2, 2, 0, 2) },
- { HV_SYS_REG_SCTLR_EL1, HVF_SYSREG(1, 0, 3, 0, 0) },
- { HV_SYS_REG_CPACR_EL1, HVF_SYSREG(1, 0, 3, 0, 2) },
- { HV_SYS_REG_TTBR0_EL1, HVF_SYSREG(2, 0, 3, 0, 0) },
- { HV_SYS_REG_TTBR1_EL1, HVF_SYSREG(2, 0, 3, 0, 1) },
- { HV_SYS_REG_TCR_EL1, HVF_SYSREG(2, 0, 3, 0, 2) },
-
- { HV_SYS_REG_APIAKEYLO_EL1, HVF_SYSREG(2, 1, 3, 0, 0) },
- { HV_SYS_REG_APIAKEYHI_EL1, HVF_SYSREG(2, 1, 3, 0, 1) },
- { HV_SYS_REG_APIBKEYLO_EL1, HVF_SYSREG(2, 1, 3, 0, 2) },
- { HV_SYS_REG_APIBKEYHI_EL1, HVF_SYSREG(2, 1, 3, 0, 3) },
- { HV_SYS_REG_APDAKEYLO_EL1, HVF_SYSREG(2, 2, 3, 0, 0) },
- { HV_SYS_REG_APDAKEYHI_EL1, HVF_SYSREG(2, 2, 3, 0, 1) },
- { HV_SYS_REG_APDBKEYLO_EL1, HVF_SYSREG(2, 2, 3, 0, 2) },
- { HV_SYS_REG_APDBKEYHI_EL1, HVF_SYSREG(2, 2, 3, 0, 3) },
- { HV_SYS_REG_APGAKEYLO_EL1, HVF_SYSREG(2, 3, 3, 0, 0) },
- { HV_SYS_REG_APGAKEYHI_EL1, HVF_SYSREG(2, 3, 3, 0, 1) },
-
- { HV_SYS_REG_SPSR_EL1, HVF_SYSREG(4, 0, 3, 0, 0) },
- { HV_SYS_REG_ELR_EL1, HVF_SYSREG(4, 0, 3, 0, 1) },
- { HV_SYS_REG_SP_EL0, HVF_SYSREG(4, 1, 3, 0, 0) },
- { HV_SYS_REG_AFSR0_EL1, HVF_SYSREG(5, 1, 3, 0, 0) },
- { HV_SYS_REG_AFSR1_EL1, HVF_SYSREG(5, 1, 3, 0, 1) },
- { HV_SYS_REG_ESR_EL1, HVF_SYSREG(5, 2, 3, 0, 0) },
- { HV_SYS_REG_FAR_EL1, HVF_SYSREG(6, 0, 3, 0, 0) },
- { HV_SYS_REG_PAR_EL1, HVF_SYSREG(7, 4, 3, 0, 0) },
- { HV_SYS_REG_MAIR_EL1, HVF_SYSREG(10, 2, 3, 0, 0) },
- { HV_SYS_REG_AMAIR_EL1, HVF_SYSREG(10, 3, 3, 0, 0) },
- { HV_SYS_REG_VBAR_EL1, HVF_SYSREG(12, 0, 3, 0, 0) },
- { HV_SYS_REG_CONTEXTIDR_EL1, HVF_SYSREG(13, 0, 3, 0, 1) },
- { HV_SYS_REG_TPIDR_EL1, HVF_SYSREG(13, 0, 3, 0, 4) },
- { HV_SYS_REG_CNTKCTL_EL1, HVF_SYSREG(14, 1, 3, 0, 0) },
- { HV_SYS_REG_CSSELR_EL1, HVF_SYSREG(0, 0, 3, 2, 0) },
- { HV_SYS_REG_TPIDR_EL0, HVF_SYSREG(13, 0, 3, 3, 2) },
- { HV_SYS_REG_TPIDRRO_EL0, HVF_SYSREG(13, 0, 3, 3, 3) },
- { HV_SYS_REG_CNTV_CTL_EL0, HVF_SYSREG(14, 3, 3, 3, 1) },
- { HV_SYS_REG_CNTV_CVAL_EL0, HVF_SYSREG(14, 3, 3, 3, 2) },
- { HV_SYS_REG_SP_EL1, HVF_SYSREG(4, 1, 3, 4, 0) },
+#include "sysreg.c.inc"
};
+#undef DEF_SYSREG
+
int hvf_get_registers(CPUState *cpu)
{
ARMCPU *arm_cpu = ARM_CPU(cpu);
diff --git a/target/arm/hvf/sysreg.c.inc b/target/arm/hvf/sysreg.c.inc
new file mode 100644
index 0000000000..222698f1d1
--- /dev/null
+++ b/target/arm/hvf/sysreg.c.inc
@@ -0,0 +1,146 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+DEF_SYSREG(HV_SYS_REG_DBGBVR0_EL1, 0, 0, 2, 0, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR0_EL1, 0, 0, 2, 0, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR0_EL1, 0, 0, 2, 0, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR0_EL1, 0, 0, 2, 0, 7)
+
+DEF_SYSREG(HV_SYS_REG_DBGBVR1_EL1, 0, 1, 2, 0, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR1_EL1, 0, 1, 2, 0, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR1_EL1, 0, 1, 2, 0, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR1_EL1, 0, 1, 2, 0, 7)
+
+DEF_SYSREG(HV_SYS_REG_DBGBVR2_EL1, 0, 2, 2, 0, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR2_EL1, 0, 2, 2, 0, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR2_EL1, 0, 2, 2, 0, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR2_EL1, 0, 2, 2, 0, 7)
+
+DEF_SYSREG(HV_SYS_REG_DBGBVR3_EL1, 0, 3, 2, 0, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR3_EL1, 0, 3, 2, 0, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR3_EL1, 0, 3, 2, 0, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR3_EL1, 0, 3, 2, 0, 7)
+
+DEF_SYSREG(HV_SYS_REG_DBGBVR4_EL1, 0, 4, 2, 0, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR4_EL1, 0, 4, 2, 0, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR4_EL1, 0, 4, 2, 0, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR4_EL1, 0, 4, 2, 0, 7)
+
+DEF_SYSREG(HV_SYS_REG_DBGBVR5_EL1, 0, 5, 2, 0, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR5_EL1, 0, 5, 2, 0, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR5_EL1, 0, 5, 2, 0, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR5_EL1, 0, 5, 2, 0, 7)
+
+DEF_SYSREG(HV_SYS_REG_DBGBVR6_EL1, 0, 6, 2, 0, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR6_EL1, 0, 6, 2, 0, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR6_EL1, 0, 6, 2, 0, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR6_EL1, 0, 6, 2, 0, 7)
+
+DEF_SYSREG(HV_SYS_REG_DBGBVR7_EL1, 0, 7, 2, 0, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR7_EL1, 0, 7, 2, 0, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR7_EL1, 0, 7, 2, 0, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR7_EL1, 0, 7, 2, 0, 7)
+
+DEF_SYSREG(HV_SYS_REG_DBGBVR8_EL1, 0, 8, 2, 0, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR8_EL1, 0, 8, 2, 0, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR8_EL1, 0, 8, 2, 0, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR8_EL1, 0, 8, 2, 0, 7)
+
+DEF_SYSREG(HV_SYS_REG_DBGBVR9_EL1, 0, 9, 2, 0, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR9_EL1, 0, 9, 2, 0, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR9_EL1, 0, 9, 2, 0, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR9_EL1, 0, 9, 2, 0, 7)
+
+DEF_SYSREG(HV_SYS_REG_DBGBVR10_EL1, 0, 10, 2, 0, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR10_EL1, 0, 10, 2, 0, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR10_EL1, 0, 10, 2, 0, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR10_EL1, 0, 10, 2, 0, 7)
+
+DEF_SYSREG(HV_SYS_REG_DBGBVR11_EL1, 0, 11, 2, 0, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR11_EL1, 0, 11, 2, 0, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR11_EL1, 0, 11, 2, 0, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR11_EL1, 0, 11, 2, 0, 7)
+
+DEF_SYSREG(HV_SYS_REG_DBGBVR12_EL1, 0, 12, 2, 0, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR12_EL1, 0, 12, 2, 0, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR12_EL1, 0, 12, 2, 0, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR12_EL1, 0, 12, 2, 0, 7)
+
+DEF_SYSREG(HV_SYS_REG_DBGBVR13_EL1, 0, 13, 2, 0, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR13_EL1, 0, 13, 2, 0, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR13_EL1, 0, 13, 2, 0, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR13_EL1, 0, 13, 2, 0, 7)
+
+DEF_SYSREG(HV_SYS_REG_DBGBVR14_EL1, 0, 14, 2, 0, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR14_EL1, 0, 14, 2, 0, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR14_EL1, 0, 14, 2, 0, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR14_EL1, 0, 14, 2, 0, 7)
+
+DEF_SYSREG(HV_SYS_REG_DBGBVR15_EL1, 0, 15, 2, 0, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR15_EL1, 0, 15, 2, 0, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR15_EL1, 0, 15, 2, 0, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR15_EL1, 0, 15, 2, 0, 7)
+
+#ifdef SYNC_NO_RAW_REGS
+/*
+ * The registers below are manually synced on init because they are
+ * marked as NO_RAW. We still list them to make number space sync easier.
+ */
+DEF_SYSREG(HV_SYS_REG_MDCCINT_EL1, 0, 2, 2, 0, 0)
+DEF_SYSREG(HV_SYS_REG_MIDR_EL1, 0, 0, 3, 0, 0)
+DEF_SYSREG(HV_SYS_REG_MPIDR_EL1, 0, 0, 3, 0, 5)
+DEF_SYSREG(HV_SYS_REG_ID_AA64PFR0_EL1, 0, 4, 3, 0, 0)
+#endif
+
+DEF_SYSREG(HV_SYS_REG_ID_AA64PFR1_EL1, 0, 4, 3, 0, 1)
+DEF_SYSREG(HV_SYS_REG_ID_AA64DFR0_EL1, 0, 5, 3, 0, 0)
+DEF_SYSREG(HV_SYS_REG_ID_AA64DFR1_EL1, 0, 5, 3, 0, 1)
+DEF_SYSREG(HV_SYS_REG_ID_AA64ISAR0_EL1, 0, 6, 3, 0, 0)
+DEF_SYSREG(HV_SYS_REG_ID_AA64ISAR1_EL1, 0, 6, 3, 0, 1)
+
+#ifdef SYNC_NO_MMFR0
+/* We keep the hardware MMFR0 around. HW limits are there anyway */
+DEF_SYSREG(HV_SYS_REG_ID_AA64MMFR0_EL1, 0, 7, 3, 0, 0)
+#endif
+
+DEF_SYSREG(HV_SYS_REG_ID_AA64MMFR1_EL1, 0, 7, 3, 0, 1)
+DEF_SYSREG(HV_SYS_REG_ID_AA64MMFR2_EL1, 0, 7, 3, 0, 2)
+/* Add ID_AA64MMFR3_EL1 here when HVF supports it */
+
+DEF_SYSREG(HV_SYS_REG_MDSCR_EL1, 0, 2, 2, 0, 2)
+DEF_SYSREG(HV_SYS_REG_SCTLR_EL1, 1, 0, 3, 0, 0)
+DEF_SYSREG(HV_SYS_REG_CPACR_EL1, 1, 0, 3, 0, 2)
+DEF_SYSREG(HV_SYS_REG_TTBR0_EL1, 2, 0, 3, 0, 0)
+DEF_SYSREG(HV_SYS_REG_TTBR1_EL1, 2, 0, 3, 0, 1)
+DEF_SYSREG(HV_SYS_REG_TCR_EL1, 2, 0, 3, 0, 2)
+
+DEF_SYSREG(HV_SYS_REG_APIAKEYLO_EL1, 2, 1, 3, 0, 0)
+DEF_SYSREG(HV_SYS_REG_APIAKEYHI_EL1, 2, 1, 3, 0, 1)
+DEF_SYSREG(HV_SYS_REG_APIBKEYLO_EL1, 2, 1, 3, 0, 2)
+DEF_SYSREG(HV_SYS_REG_APIBKEYHI_EL1, 2, 1, 3, 0, 3)
+DEF_SYSREG(HV_SYS_REG_APDAKEYLO_EL1, 2, 2, 3, 0, 0)
+DEF_SYSREG(HV_SYS_REG_APDAKEYHI_EL1, 2, 2, 3, 0, 1)
+DEF_SYSREG(HV_SYS_REG_APDBKEYLO_EL1, 2, 2, 3, 0, 2)
+DEF_SYSREG(HV_SYS_REG_APDBKEYHI_EL1, 2, 2, 3, 0, 3)
+DEF_SYSREG(HV_SYS_REG_APGAKEYLO_EL1, 2, 3, 3, 0, 0)
+DEF_SYSREG(HV_SYS_REG_APGAKEYHI_EL1, 2, 3, 3, 0, 1)
+
+DEF_SYSREG(HV_SYS_REG_SPSR_EL1, 4, 0, 3, 0, 0)
+DEF_SYSREG(HV_SYS_REG_ELR_EL1, 4, 0, 3, 0, 1)
+DEF_SYSREG(HV_SYS_REG_SP_EL0, 4, 1, 3, 0, 0)
+DEF_SYSREG(HV_SYS_REG_AFSR0_EL1, 5, 1, 3, 0, 0)
+DEF_SYSREG(HV_SYS_REG_AFSR1_EL1, 5, 1, 3, 0, 1)
+DEF_SYSREG(HV_SYS_REG_ESR_EL1, 5, 2, 3, 0, 0)
+DEF_SYSREG(HV_SYS_REG_FAR_EL1, 6, 0, 3, 0, 0)
+DEF_SYSREG(HV_SYS_REG_PAR_EL1, 7, 4, 3, 0, 0)
+DEF_SYSREG(HV_SYS_REG_MAIR_EL1, 10, 2, 3, 0, 0)
+DEF_SYSREG(HV_SYS_REG_AMAIR_EL1, 10, 3, 3, 0, 0)
+DEF_SYSREG(HV_SYS_REG_VBAR_EL1, 12, 0, 3, 0, 0)
+DEF_SYSREG(HV_SYS_REG_CONTEXTIDR_EL1, 13, 0, 3, 0, 1)
+DEF_SYSREG(HV_SYS_REG_TPIDR_EL1, 13, 0, 3, 0, 4)
+DEF_SYSREG(HV_SYS_REG_CNTKCTL_EL1, 14, 1, 3, 0, 0)
+DEF_SYSREG(HV_SYS_REG_CSSELR_EL1, 0, 0, 3, 2, 0)
+DEF_SYSREG(HV_SYS_REG_TPIDR_EL0, 13, 0, 3, 3, 2)
+DEF_SYSREG(HV_SYS_REG_TPIDRRO_EL0, 13, 0, 3, 3, 3)
+DEF_SYSREG(HV_SYS_REG_CNTV_CTL_EL0, 14, 3, 3, 3, 1)
+DEF_SYSREG(HV_SYS_REG_CNTV_CVAL_EL0, 14, 3, 3, 3, 2)
+DEF_SYSREG(HV_SYS_REG_SP_EL1, 4, 1, 3, 4, 0)
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 03/36] target/arm/hvf: Split out sysreg.c.inc
2025-09-16 14:22 ` [PATCH v2 03/36] target/arm/hvf: Split out sysreg.c.inc Richard Henderson
@ 2025-09-23 10:38 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-23 10:38 UTC (permalink / raw)
To: Richard Henderson, qemu-devel
Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
On 16/9/25 16:22, Richard Henderson wrote:
> Move the list of supported sysregs to a reuseable file.
>
> Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/hvf/hvf.c | 147 ++----------------------------------
> target/arm/hvf/sysreg.c.inc | 146 +++++++++++++++++++++++++++++++++++
> 2 files changed, 152 insertions(+), 141 deletions(-)
> create mode 100644 target/arm/hvf/sysreg.c.inc
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 04/36] target/arm/hvf: Reorder DEF_SYSREG arguments
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (2 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 03/36] target/arm/hvf: Split out sysreg.c.inc Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-23 10:38 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 05/36] target/arm/hvf: Add KVMID_TO_HVF, HVF_TO_KVMID Richard Henderson
` (32 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
The order of the parameters in the Arm ARM is
op0, op1, crn, crm, op2
Reorder the arguments of DEF_SYSREG to match.
Mechanical change to sysreg.c.inc using
sed 's/\([^,]*\),\([^,]*\),\([^,]*\),\([^,]*\),\([^,]*\)/\1,\4,\5,\2,\3/'
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/hvf/hvf.c | 2 +-
target/arm/hvf/sysreg.c.inc | 224 ++++++++++++++++++------------------
2 files changed, 113 insertions(+), 113 deletions(-)
diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
index 9f8e3083b4..f68924ba1f 100644
--- a/target/arm/hvf/hvf.c
+++ b/target/arm/hvf/hvf.c
@@ -403,7 +403,7 @@ struct hvf_sreg_match {
uint32_t cp_idx;
};
-#define DEF_SYSREG(HVF_ID, crn, crm, op0, op1, op2) \
+#define DEF_SYSREG(HVF_ID, op0, op1, crn, crm, op2) \
{ HVF_ID, HVF_SYSREG(crn, crm, op0, op1, op2) },
static struct hvf_sreg_match hvf_sreg_match[] = {
diff --git a/target/arm/hvf/sysreg.c.inc b/target/arm/hvf/sysreg.c.inc
index 222698f1d1..f2276d534e 100644
--- a/target/arm/hvf/sysreg.c.inc
+++ b/target/arm/hvf/sysreg.c.inc
@@ -1,146 +1,146 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
-DEF_SYSREG(HV_SYS_REG_DBGBVR0_EL1, 0, 0, 2, 0, 4)
-DEF_SYSREG(HV_SYS_REG_DBGBCR0_EL1, 0, 0, 2, 0, 5)
-DEF_SYSREG(HV_SYS_REG_DBGWVR0_EL1, 0, 0, 2, 0, 6)
-DEF_SYSREG(HV_SYS_REG_DBGWCR0_EL1, 0, 0, 2, 0, 7)
+DEF_SYSREG(HV_SYS_REG_DBGBVR0_EL1, 2, 0, 0, 0, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR0_EL1, 2, 0, 0, 0, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR0_EL1, 2, 0, 0, 0, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR0_EL1, 2, 0, 0, 0, 7)
-DEF_SYSREG(HV_SYS_REG_DBGBVR1_EL1, 0, 1, 2, 0, 4)
-DEF_SYSREG(HV_SYS_REG_DBGBCR1_EL1, 0, 1, 2, 0, 5)
-DEF_SYSREG(HV_SYS_REG_DBGWVR1_EL1, 0, 1, 2, 0, 6)
-DEF_SYSREG(HV_SYS_REG_DBGWCR1_EL1, 0, 1, 2, 0, 7)
+DEF_SYSREG(HV_SYS_REG_DBGBVR1_EL1, 2, 0, 0, 1, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR1_EL1, 2, 0, 0, 1, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR1_EL1, 2, 0, 0, 1, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR1_EL1, 2, 0, 0, 1, 7)
-DEF_SYSREG(HV_SYS_REG_DBGBVR2_EL1, 0, 2, 2, 0, 4)
-DEF_SYSREG(HV_SYS_REG_DBGBCR2_EL1, 0, 2, 2, 0, 5)
-DEF_SYSREG(HV_SYS_REG_DBGWVR2_EL1, 0, 2, 2, 0, 6)
-DEF_SYSREG(HV_SYS_REG_DBGWCR2_EL1, 0, 2, 2, 0, 7)
+DEF_SYSREG(HV_SYS_REG_DBGBVR2_EL1, 2, 0, 0, 2, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR2_EL1, 2, 0, 0, 2, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR2_EL1, 2, 0, 0, 2, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR2_EL1, 2, 0, 0, 2, 7)
-DEF_SYSREG(HV_SYS_REG_DBGBVR3_EL1, 0, 3, 2, 0, 4)
-DEF_SYSREG(HV_SYS_REG_DBGBCR3_EL1, 0, 3, 2, 0, 5)
-DEF_SYSREG(HV_SYS_REG_DBGWVR3_EL1, 0, 3, 2, 0, 6)
-DEF_SYSREG(HV_SYS_REG_DBGWCR3_EL1, 0, 3, 2, 0, 7)
+DEF_SYSREG(HV_SYS_REG_DBGBVR3_EL1, 2, 0, 0, 3, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR3_EL1, 2, 0, 0, 3, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR3_EL1, 2, 0, 0, 3, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR3_EL1, 2, 0, 0, 3, 7)
-DEF_SYSREG(HV_SYS_REG_DBGBVR4_EL1, 0, 4, 2, 0, 4)
-DEF_SYSREG(HV_SYS_REG_DBGBCR4_EL1, 0, 4, 2, 0, 5)
-DEF_SYSREG(HV_SYS_REG_DBGWVR4_EL1, 0, 4, 2, 0, 6)
-DEF_SYSREG(HV_SYS_REG_DBGWCR4_EL1, 0, 4, 2, 0, 7)
+DEF_SYSREG(HV_SYS_REG_DBGBVR4_EL1, 2, 0, 0, 4, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR4_EL1, 2, 0, 0, 4, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR4_EL1, 2, 0, 0, 4, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR4_EL1, 2, 0, 0, 4, 7)
-DEF_SYSREG(HV_SYS_REG_DBGBVR5_EL1, 0, 5, 2, 0, 4)
-DEF_SYSREG(HV_SYS_REG_DBGBCR5_EL1, 0, 5, 2, 0, 5)
-DEF_SYSREG(HV_SYS_REG_DBGWVR5_EL1, 0, 5, 2, 0, 6)
-DEF_SYSREG(HV_SYS_REG_DBGWCR5_EL1, 0, 5, 2, 0, 7)
+DEF_SYSREG(HV_SYS_REG_DBGBVR5_EL1, 2, 0, 0, 5, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR5_EL1, 2, 0, 0, 5, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR5_EL1, 2, 0, 0, 5, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR5_EL1, 2, 0, 0, 5, 7)
-DEF_SYSREG(HV_SYS_REG_DBGBVR6_EL1, 0, 6, 2, 0, 4)
-DEF_SYSREG(HV_SYS_REG_DBGBCR6_EL1, 0, 6, 2, 0, 5)
-DEF_SYSREG(HV_SYS_REG_DBGWVR6_EL1, 0, 6, 2, 0, 6)
-DEF_SYSREG(HV_SYS_REG_DBGWCR6_EL1, 0, 6, 2, 0, 7)
+DEF_SYSREG(HV_SYS_REG_DBGBVR6_EL1, 2, 0, 0, 6, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR6_EL1, 2, 0, 0, 6, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR6_EL1, 2, 0, 0, 6, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR6_EL1, 2, 0, 0, 6, 7)
-DEF_SYSREG(HV_SYS_REG_DBGBVR7_EL1, 0, 7, 2, 0, 4)
-DEF_SYSREG(HV_SYS_REG_DBGBCR7_EL1, 0, 7, 2, 0, 5)
-DEF_SYSREG(HV_SYS_REG_DBGWVR7_EL1, 0, 7, 2, 0, 6)
-DEF_SYSREG(HV_SYS_REG_DBGWCR7_EL1, 0, 7, 2, 0, 7)
+DEF_SYSREG(HV_SYS_REG_DBGBVR7_EL1, 2, 0, 0, 7, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR7_EL1, 2, 0, 0, 7, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR7_EL1, 2, 0, 0, 7, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR7_EL1, 2, 0, 0, 7, 7)
-DEF_SYSREG(HV_SYS_REG_DBGBVR8_EL1, 0, 8, 2, 0, 4)
-DEF_SYSREG(HV_SYS_REG_DBGBCR8_EL1, 0, 8, 2, 0, 5)
-DEF_SYSREG(HV_SYS_REG_DBGWVR8_EL1, 0, 8, 2, 0, 6)
-DEF_SYSREG(HV_SYS_REG_DBGWCR8_EL1, 0, 8, 2, 0, 7)
+DEF_SYSREG(HV_SYS_REG_DBGBVR8_EL1, 2, 0, 0, 8, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR8_EL1, 2, 0, 0, 8, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR8_EL1, 2, 0, 0, 8, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR8_EL1, 2, 0, 0, 8, 7)
-DEF_SYSREG(HV_SYS_REG_DBGBVR9_EL1, 0, 9, 2, 0, 4)
-DEF_SYSREG(HV_SYS_REG_DBGBCR9_EL1, 0, 9, 2, 0, 5)
-DEF_SYSREG(HV_SYS_REG_DBGWVR9_EL1, 0, 9, 2, 0, 6)
-DEF_SYSREG(HV_SYS_REG_DBGWCR9_EL1, 0, 9, 2, 0, 7)
+DEF_SYSREG(HV_SYS_REG_DBGBVR9_EL1, 2, 0, 0, 9, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR9_EL1, 2, 0, 0, 9, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR9_EL1, 2, 0, 0, 9, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR9_EL1, 2, 0, 0, 9, 7)
-DEF_SYSREG(HV_SYS_REG_DBGBVR10_EL1, 0, 10, 2, 0, 4)
-DEF_SYSREG(HV_SYS_REG_DBGBCR10_EL1, 0, 10, 2, 0, 5)
-DEF_SYSREG(HV_SYS_REG_DBGWVR10_EL1, 0, 10, 2, 0, 6)
-DEF_SYSREG(HV_SYS_REG_DBGWCR10_EL1, 0, 10, 2, 0, 7)
+DEF_SYSREG(HV_SYS_REG_DBGBVR10_EL1, 2, 0, 0, 10, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR10_EL1, 2, 0, 0, 10, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR10_EL1, 2, 0, 0, 10, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR10_EL1, 2, 0, 0, 10, 7)
-DEF_SYSREG(HV_SYS_REG_DBGBVR11_EL1, 0, 11, 2, 0, 4)
-DEF_SYSREG(HV_SYS_REG_DBGBCR11_EL1, 0, 11, 2, 0, 5)
-DEF_SYSREG(HV_SYS_REG_DBGWVR11_EL1, 0, 11, 2, 0, 6)
-DEF_SYSREG(HV_SYS_REG_DBGWCR11_EL1, 0, 11, 2, 0, 7)
+DEF_SYSREG(HV_SYS_REG_DBGBVR11_EL1, 2, 0, 0, 11, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR11_EL1, 2, 0, 0, 11, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR11_EL1, 2, 0, 0, 11, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR11_EL1, 2, 0, 0, 11, 7)
-DEF_SYSREG(HV_SYS_REG_DBGBVR12_EL1, 0, 12, 2, 0, 4)
-DEF_SYSREG(HV_SYS_REG_DBGBCR12_EL1, 0, 12, 2, 0, 5)
-DEF_SYSREG(HV_SYS_REG_DBGWVR12_EL1, 0, 12, 2, 0, 6)
-DEF_SYSREG(HV_SYS_REG_DBGWCR12_EL1, 0, 12, 2, 0, 7)
+DEF_SYSREG(HV_SYS_REG_DBGBVR12_EL1, 2, 0, 0, 12, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR12_EL1, 2, 0, 0, 12, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR12_EL1, 2, 0, 0, 12, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR12_EL1, 2, 0, 0, 12, 7)
-DEF_SYSREG(HV_SYS_REG_DBGBVR13_EL1, 0, 13, 2, 0, 4)
-DEF_SYSREG(HV_SYS_REG_DBGBCR13_EL1, 0, 13, 2, 0, 5)
-DEF_SYSREG(HV_SYS_REG_DBGWVR13_EL1, 0, 13, 2, 0, 6)
-DEF_SYSREG(HV_SYS_REG_DBGWCR13_EL1, 0, 13, 2, 0, 7)
+DEF_SYSREG(HV_SYS_REG_DBGBVR13_EL1, 2, 0, 0, 13, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR13_EL1, 2, 0, 0, 13, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR13_EL1, 2, 0, 0, 13, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR13_EL1, 2, 0, 0, 13, 7)
-DEF_SYSREG(HV_SYS_REG_DBGBVR14_EL1, 0, 14, 2, 0, 4)
-DEF_SYSREG(HV_SYS_REG_DBGBCR14_EL1, 0, 14, 2, 0, 5)
-DEF_SYSREG(HV_SYS_REG_DBGWVR14_EL1, 0, 14, 2, 0, 6)
-DEF_SYSREG(HV_SYS_REG_DBGWCR14_EL1, 0, 14, 2, 0, 7)
+DEF_SYSREG(HV_SYS_REG_DBGBVR14_EL1, 2, 0, 0, 14, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR14_EL1, 2, 0, 0, 14, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR14_EL1, 2, 0, 0, 14, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR14_EL1, 2, 0, 0, 14, 7)
-DEF_SYSREG(HV_SYS_REG_DBGBVR15_EL1, 0, 15, 2, 0, 4)
-DEF_SYSREG(HV_SYS_REG_DBGBCR15_EL1, 0, 15, 2, 0, 5)
-DEF_SYSREG(HV_SYS_REG_DBGWVR15_EL1, 0, 15, 2, 0, 6)
-DEF_SYSREG(HV_SYS_REG_DBGWCR15_EL1, 0, 15, 2, 0, 7)
+DEF_SYSREG(HV_SYS_REG_DBGBVR15_EL1, 2, 0, 0, 15, 4)
+DEF_SYSREG(HV_SYS_REG_DBGBCR15_EL1, 2, 0, 0, 15, 5)
+DEF_SYSREG(HV_SYS_REG_DBGWVR15_EL1, 2, 0, 0, 15, 6)
+DEF_SYSREG(HV_SYS_REG_DBGWCR15_EL1, 2, 0, 0, 15, 7)
#ifdef SYNC_NO_RAW_REGS
/*
* The registers below are manually synced on init because they are
* marked as NO_RAW. We still list them to make number space sync easier.
*/
-DEF_SYSREG(HV_SYS_REG_MDCCINT_EL1, 0, 2, 2, 0, 0)
-DEF_SYSREG(HV_SYS_REG_MIDR_EL1, 0, 0, 3, 0, 0)
-DEF_SYSREG(HV_SYS_REG_MPIDR_EL1, 0, 0, 3, 0, 5)
-DEF_SYSREG(HV_SYS_REG_ID_AA64PFR0_EL1, 0, 4, 3, 0, 0)
+DEF_SYSREG(HV_SYS_REG_MDCCINT_EL1, 2, 0, 0, 2, 0)
+DEF_SYSREG(HV_SYS_REG_MIDR_EL1, 3, 0, 0, 0, 0)
+DEF_SYSREG(HV_SYS_REG_MPIDR_EL1, 3, 0, 0, 0, 5)
+DEF_SYSREG(HV_SYS_REG_ID_AA64PFR0_EL1, 3, 0, 0, 4, 0)
#endif
-DEF_SYSREG(HV_SYS_REG_ID_AA64PFR1_EL1, 0, 4, 3, 0, 1)
-DEF_SYSREG(HV_SYS_REG_ID_AA64DFR0_EL1, 0, 5, 3, 0, 0)
-DEF_SYSREG(HV_SYS_REG_ID_AA64DFR1_EL1, 0, 5, 3, 0, 1)
-DEF_SYSREG(HV_SYS_REG_ID_AA64ISAR0_EL1, 0, 6, 3, 0, 0)
-DEF_SYSREG(HV_SYS_REG_ID_AA64ISAR1_EL1, 0, 6, 3, 0, 1)
+DEF_SYSREG(HV_SYS_REG_ID_AA64PFR1_EL1, 3, 0, 0, 4, 1)
+DEF_SYSREG(HV_SYS_REG_ID_AA64DFR0_EL1, 3, 0, 0, 5, 0)
+DEF_SYSREG(HV_SYS_REG_ID_AA64DFR1_EL1, 3, 0, 0, 5, 1)
+DEF_SYSREG(HV_SYS_REG_ID_AA64ISAR0_EL1, 3, 0, 0, 6, 0)
+DEF_SYSREG(HV_SYS_REG_ID_AA64ISAR1_EL1, 3, 0, 0, 6, 1)
#ifdef SYNC_NO_MMFR0
/* We keep the hardware MMFR0 around. HW limits are there anyway */
-DEF_SYSREG(HV_SYS_REG_ID_AA64MMFR0_EL1, 0, 7, 3, 0, 0)
+DEF_SYSREG(HV_SYS_REG_ID_AA64MMFR0_EL1, 3, 0, 0, 7, 0)
#endif
-DEF_SYSREG(HV_SYS_REG_ID_AA64MMFR1_EL1, 0, 7, 3, 0, 1)
-DEF_SYSREG(HV_SYS_REG_ID_AA64MMFR2_EL1, 0, 7, 3, 0, 2)
+DEF_SYSREG(HV_SYS_REG_ID_AA64MMFR1_EL1, 3, 0, 0, 7, 1)
+DEF_SYSREG(HV_SYS_REG_ID_AA64MMFR2_EL1, 3, 0, 0, 7, 2)
/* Add ID_AA64MMFR3_EL1 here when HVF supports it */
-DEF_SYSREG(HV_SYS_REG_MDSCR_EL1, 0, 2, 2, 0, 2)
-DEF_SYSREG(HV_SYS_REG_SCTLR_EL1, 1, 0, 3, 0, 0)
-DEF_SYSREG(HV_SYS_REG_CPACR_EL1, 1, 0, 3, 0, 2)
-DEF_SYSREG(HV_SYS_REG_TTBR0_EL1, 2, 0, 3, 0, 0)
-DEF_SYSREG(HV_SYS_REG_TTBR1_EL1, 2, 0, 3, 0, 1)
-DEF_SYSREG(HV_SYS_REG_TCR_EL1, 2, 0, 3, 0, 2)
+DEF_SYSREG(HV_SYS_REG_MDSCR_EL1, 2, 0, 0, 2, 2)
+DEF_SYSREG(HV_SYS_REG_SCTLR_EL1, 3, 0, 1, 0, 0)
+DEF_SYSREG(HV_SYS_REG_CPACR_EL1, 3, 0, 1, 0, 2)
+DEF_SYSREG(HV_SYS_REG_TTBR0_EL1, 3, 0, 2, 0, 0)
+DEF_SYSREG(HV_SYS_REG_TTBR1_EL1, 3, 0, 2, 0, 1)
+DEF_SYSREG(HV_SYS_REG_TCR_EL1, 3, 0, 2, 0, 2)
-DEF_SYSREG(HV_SYS_REG_APIAKEYLO_EL1, 2, 1, 3, 0, 0)
-DEF_SYSREG(HV_SYS_REG_APIAKEYHI_EL1, 2, 1, 3, 0, 1)
-DEF_SYSREG(HV_SYS_REG_APIBKEYLO_EL1, 2, 1, 3, 0, 2)
-DEF_SYSREG(HV_SYS_REG_APIBKEYHI_EL1, 2, 1, 3, 0, 3)
-DEF_SYSREG(HV_SYS_REG_APDAKEYLO_EL1, 2, 2, 3, 0, 0)
-DEF_SYSREG(HV_SYS_REG_APDAKEYHI_EL1, 2, 2, 3, 0, 1)
-DEF_SYSREG(HV_SYS_REG_APDBKEYLO_EL1, 2, 2, 3, 0, 2)
-DEF_SYSREG(HV_SYS_REG_APDBKEYHI_EL1, 2, 2, 3, 0, 3)
-DEF_SYSREG(HV_SYS_REG_APGAKEYLO_EL1, 2, 3, 3, 0, 0)
-DEF_SYSREG(HV_SYS_REG_APGAKEYHI_EL1, 2, 3, 3, 0, 1)
+DEF_SYSREG(HV_SYS_REG_APIAKEYLO_EL1, 3, 0, 2, 1, 0)
+DEF_SYSREG(HV_SYS_REG_APIAKEYHI_EL1, 3, 0, 2, 1, 1)
+DEF_SYSREG(HV_SYS_REG_APIBKEYLO_EL1, 3, 0, 2, 1, 2)
+DEF_SYSREG(HV_SYS_REG_APIBKEYHI_EL1, 3, 0, 2, 1, 3)
+DEF_SYSREG(HV_SYS_REG_APDAKEYLO_EL1, 3, 0, 2, 2, 0)
+DEF_SYSREG(HV_SYS_REG_APDAKEYHI_EL1, 3, 0, 2, 2, 1)
+DEF_SYSREG(HV_SYS_REG_APDBKEYLO_EL1, 3, 0, 2, 2, 2)
+DEF_SYSREG(HV_SYS_REG_APDBKEYHI_EL1, 3, 0, 2, 2, 3)
+DEF_SYSREG(HV_SYS_REG_APGAKEYLO_EL1, 3, 0, 2, 3, 0)
+DEF_SYSREG(HV_SYS_REG_APGAKEYHI_EL1, 3, 0, 2, 3, 1)
-DEF_SYSREG(HV_SYS_REG_SPSR_EL1, 4, 0, 3, 0, 0)
-DEF_SYSREG(HV_SYS_REG_ELR_EL1, 4, 0, 3, 0, 1)
-DEF_SYSREG(HV_SYS_REG_SP_EL0, 4, 1, 3, 0, 0)
-DEF_SYSREG(HV_SYS_REG_AFSR0_EL1, 5, 1, 3, 0, 0)
-DEF_SYSREG(HV_SYS_REG_AFSR1_EL1, 5, 1, 3, 0, 1)
-DEF_SYSREG(HV_SYS_REG_ESR_EL1, 5, 2, 3, 0, 0)
-DEF_SYSREG(HV_SYS_REG_FAR_EL1, 6, 0, 3, 0, 0)
-DEF_SYSREG(HV_SYS_REG_PAR_EL1, 7, 4, 3, 0, 0)
-DEF_SYSREG(HV_SYS_REG_MAIR_EL1, 10, 2, 3, 0, 0)
-DEF_SYSREG(HV_SYS_REG_AMAIR_EL1, 10, 3, 3, 0, 0)
-DEF_SYSREG(HV_SYS_REG_VBAR_EL1, 12, 0, 3, 0, 0)
-DEF_SYSREG(HV_SYS_REG_CONTEXTIDR_EL1, 13, 0, 3, 0, 1)
-DEF_SYSREG(HV_SYS_REG_TPIDR_EL1, 13, 0, 3, 0, 4)
-DEF_SYSREG(HV_SYS_REG_CNTKCTL_EL1, 14, 1, 3, 0, 0)
-DEF_SYSREG(HV_SYS_REG_CSSELR_EL1, 0, 0, 3, 2, 0)
-DEF_SYSREG(HV_SYS_REG_TPIDR_EL0, 13, 0, 3, 3, 2)
-DEF_SYSREG(HV_SYS_REG_TPIDRRO_EL0, 13, 0, 3, 3, 3)
-DEF_SYSREG(HV_SYS_REG_CNTV_CTL_EL0, 14, 3, 3, 3, 1)
-DEF_SYSREG(HV_SYS_REG_CNTV_CVAL_EL0, 14, 3, 3, 3, 2)
-DEF_SYSREG(HV_SYS_REG_SP_EL1, 4, 1, 3, 4, 0)
+DEF_SYSREG(HV_SYS_REG_SPSR_EL1, 3, 0, 4, 0, 0)
+DEF_SYSREG(HV_SYS_REG_ELR_EL1, 3, 0, 4, 0, 1)
+DEF_SYSREG(HV_SYS_REG_SP_EL0, 3, 0, 4, 1, 0)
+DEF_SYSREG(HV_SYS_REG_AFSR0_EL1, 3, 0, 5, 1, 0)
+DEF_SYSREG(HV_SYS_REG_AFSR1_EL1, 3, 0, 5, 1, 1)
+DEF_SYSREG(HV_SYS_REG_ESR_EL1, 3, 0, 5, 2, 0)
+DEF_SYSREG(HV_SYS_REG_FAR_EL1, 3, 0, 6, 0, 0)
+DEF_SYSREG(HV_SYS_REG_PAR_EL1, 3, 0, 7, 4, 0)
+DEF_SYSREG(HV_SYS_REG_MAIR_EL1, 3, 0, 10, 2, 0)
+DEF_SYSREG(HV_SYS_REG_AMAIR_EL1, 3, 0, 10, 3, 0)
+DEF_SYSREG(HV_SYS_REG_VBAR_EL1, 3, 0, 12, 0, 0)
+DEF_SYSREG(HV_SYS_REG_CONTEXTIDR_EL1, 3, 0, 13, 0, 1)
+DEF_SYSREG(HV_SYS_REG_TPIDR_EL1, 3, 0, 13, 0, 4)
+DEF_SYSREG(HV_SYS_REG_CNTKCTL_EL1, 3, 0, 14, 1, 0)
+DEF_SYSREG(HV_SYS_REG_CSSELR_EL1, 3, 2, 0, 0, 0)
+DEF_SYSREG(HV_SYS_REG_TPIDR_EL0, 3, 3, 13, 0, 2)
+DEF_SYSREG(HV_SYS_REG_TPIDRRO_EL0, 3, 3, 13, 0, 3)
+DEF_SYSREG(HV_SYS_REG_CNTV_CTL_EL0, 3, 3, 14, 3, 1)
+DEF_SYSREG(HV_SYS_REG_CNTV_CVAL_EL0, 3, 3, 14, 3, 2)
+DEF_SYSREG(HV_SYS_REG_SP_EL1, 3, 4, 4, 1, 0)
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 04/36] target/arm/hvf: Reorder DEF_SYSREG arguments
2025-09-16 14:22 ` [PATCH v2 04/36] target/arm/hvf: Reorder DEF_SYSREG arguments Richard Henderson
@ 2025-09-23 10:38 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-23 10:38 UTC (permalink / raw)
To: Richard Henderson, qemu-devel
Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
On 16/9/25 16:22, Richard Henderson wrote:
> The order of the parameters in the Arm ARM is
>
> op0, op1, crn, crm, op2
>
> Reorder the arguments of DEF_SYSREG to match.
> Mechanical change to sysreg.c.inc using
>
> sed 's/\([^,]*\),\([^,]*\),\([^,]*\),\([^,]*\),\([^,]*\)/\1,\4,\5,\2,\3/'
>
> Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/hvf/hvf.c | 2 +-
> target/arm/hvf/sysreg.c.inc | 224 ++++++++++++++++++------------------
> 2 files changed, 113 insertions(+), 113 deletions(-)
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 05/36] target/arm/hvf: Add KVMID_TO_HVF, HVF_TO_KVMID
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (3 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 04/36] target/arm/hvf: Reorder DEF_SYSREG arguments Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-23 10:39 ` Philippe Mathieu-Daudé
2025-09-25 10:31 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 06/36] target/arm/hvf: Remove hvf_sreg_match.key Richard Henderson
` (31 subsequent siblings)
36 siblings, 2 replies; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
Conversion between KVM system registers ids and the HVF system
register ids is trivial.
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/hvf/hvf.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
index f68924ba1f..7515e59c56 100644
--- a/target/arm/hvf/hvf.c
+++ b/target/arm/hvf/hvf.c
@@ -403,6 +403,26 @@ struct hvf_sreg_match {
uint32_t cp_idx;
};
+/*
+ * QEMU uses KVM system register ids in the migration format.
+ * Conveniently, HVF uses the same encoding of the op* and cr* parameters
+ * within the low 16 bits of the ids. Thus conversion between the
+ * formats is trivial.
+ */
+
+#define KVMID_TO_HVF(KVM) ((KVM) & 0xffff)
+#define HVF_TO_KVMID(HVF) \
+ (CP_REG_ARM64 | CP_REG_SIZE_U64 | CP_REG_ARM64_SYSREG | (HVF))
+
+/* Verify this at compile-time. */
+
+#define DEF_SYSREG(HVF_ID, ...) \
+ QEMU_BUILD_BUG_ON(HVF_ID != KVMID_TO_HVF(KVMID_AA64_SYS_REG64(__VA_ARGS__)));
+
+#include "sysreg.c.inc"
+
+#undef DEF_SYSREG
+
#define DEF_SYSREG(HVF_ID, op0, op1, crn, crm, op2) \
{ HVF_ID, HVF_SYSREG(crn, crm, op0, op1, op2) },
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 05/36] target/arm/hvf: Add KVMID_TO_HVF, HVF_TO_KVMID
2025-09-16 14:22 ` [PATCH v2 05/36] target/arm/hvf: Add KVMID_TO_HVF, HVF_TO_KVMID Richard Henderson
@ 2025-09-23 10:39 ` Philippe Mathieu-Daudé
2025-09-25 10:31 ` Philippe Mathieu-Daudé
1 sibling, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-23 10:39 UTC (permalink / raw)
To: Richard Henderson, qemu-devel
Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
On 16/9/25 16:22, Richard Henderson wrote:
> Conversion between KVM system registers ids and the HVF system
> register ids is trivial.
>
> Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/hvf/hvf.c | 20 ++++++++++++++++++++
> 1 file changed, 20 insertions(+)
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* Re: [PATCH v2 05/36] target/arm/hvf: Add KVMID_TO_HVF, HVF_TO_KVMID
2025-09-16 14:22 ` [PATCH v2 05/36] target/arm/hvf: Add KVMID_TO_HVF, HVF_TO_KVMID Richard Henderson
2025-09-23 10:39 ` Philippe Mathieu-Daudé
@ 2025-09-25 10:31 ` Philippe Mathieu-Daudé
1 sibling, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 10:31 UTC (permalink / raw)
To: Richard Henderson, qemu-devel
Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
On 16/9/25 16:22, Richard Henderson wrote:
> Conversion between KVM system registers ids and the HVF system
> register ids is trivial.
>
> Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/hvf/hvf.c | 20 ++++++++++++++++++++
> 1 file changed, 20 insertions(+)
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 06/36] target/arm/hvf: Remove hvf_sreg_match.key
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (4 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 05/36] target/arm/hvf: Add KVMID_TO_HVF, HVF_TO_KVMID Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 10:31 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 07/36] target/arm/hvf: Replace hvf_sreg_match with hvf_sreg_list Richard Henderson
` (30 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
Use conversion functions instead of table lookup.
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/hvf/hvf.c | 35 +++++++++++++++++++----------------
1 file changed, 19 insertions(+), 16 deletions(-)
diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
index 7515e59c56..98f49ce33a 100644
--- a/target/arm/hvf/hvf.c
+++ b/target/arm/hvf/hvf.c
@@ -152,9 +152,6 @@ void hvf_arm_init_debug(void)
g_array_sized_new(true, true, sizeof(HWWatchpoint), max_hw_wps);
}
-#define HVF_SYSREG(crn, crm, op0, op1, op2) \
- ENCODE_AA64_CP_REG(CP_REG_ARM64_SYSREG_CP, crn, crm, op0, op1, op2)
-
#define SYSREG_OP0_SHIFT 20
#define SYSREG_OP0_MASK 0x3
#define SYSREG_OP0(sysreg) ((sysreg >> SYSREG_OP0_SHIFT) & SYSREG_OP0_MASK)
@@ -399,7 +396,6 @@ static const struct hvf_reg_match hvf_fpreg_match[] = {
struct hvf_sreg_match {
int reg;
- uint32_t key;
uint32_t cp_idx;
};
@@ -423,8 +419,7 @@ struct hvf_sreg_match {
#undef DEF_SYSREG
-#define DEF_SYSREG(HVF_ID, op0, op1, crn, crm, op2) \
- { HVF_ID, HVF_SYSREG(crn, crm, op0, op1, op2) },
+#define DEF_SYSREG(HVF_ID, op0, op1, crn, crm, op2) { HVF_ID },
static struct hvf_sreg_match hvf_sreg_match[] = {
#include "sysreg.c.inc"
@@ -469,13 +464,16 @@ int hvf_get_registers(CPUState *cpu)
pstate_write(env, val);
for (i = 0; i < ARRAY_SIZE(hvf_sreg_match); i++) {
+ int hvf_id = hvf_sreg_match[i].reg;
+ uint64_t kvm_id = HVF_TO_KVMID(hvf_id);
+
if (hvf_sreg_match[i].cp_idx == -1) {
continue;
}
if (cpu->accel->guest_debug_enabled) {
/* Handle debug registers */
- switch (hvf_sreg_match[i].reg) {
+ switch (hvf_id) {
case HV_SYS_REG_DBGBVR0_EL1:
case HV_SYS_REG_DBGBCR0_EL1:
case HV_SYS_REG_DBGWVR0_EL1:
@@ -549,8 +547,10 @@ int hvf_get_registers(CPUState *cpu)
* vCPU but simply keep the values from the previous
* environment.
*/
- const ARMCPRegInfo *ri;
- ri = get_arm_cp_reginfo(arm_cpu->cp_regs, hvf_sreg_match[i].key);
+ uint32_t key = kvm_to_cpreg_id(kvm_id);
+ const ARMCPRegInfo *ri =
+ get_arm_cp_reginfo(arm_cpu->cp_regs, key);
+
val = read_raw_cp_reg(env, ri);
arm_cpu->cpreg_values[hvf_sreg_match[i].cp_idx] = val;
@@ -559,7 +559,7 @@ int hvf_get_registers(CPUState *cpu)
}
}
- ret = hv_vcpu_get_sys_reg(cpu->accel->fd, hvf_sreg_match[i].reg, &val);
+ ret = hv_vcpu_get_sys_reg(cpu->accel->fd, hvf_id, &val);
assert_hvf_ok(ret);
arm_cpu->cpreg_values[hvf_sreg_match[i].cp_idx] = val;
@@ -606,13 +606,15 @@ int hvf_put_registers(CPUState *cpu)
assert(write_cpustate_to_list(arm_cpu, false));
for (i = 0; i < ARRAY_SIZE(hvf_sreg_match); i++) {
+ int hvf_id = hvf_sreg_match[i].reg;
+
if (hvf_sreg_match[i].cp_idx == -1) {
continue;
}
if (cpu->accel->guest_debug_enabled) {
/* Handle debug registers */
- switch (hvf_sreg_match[i].reg) {
+ switch (hvf_id) {
case HV_SYS_REG_DBGBVR0_EL1:
case HV_SYS_REG_DBGBCR0_EL1:
case HV_SYS_REG_DBGWVR0_EL1:
@@ -687,7 +689,7 @@ int hvf_put_registers(CPUState *cpu)
}
val = arm_cpu->cpreg_values[hvf_sreg_match[i].cp_idx];
- ret = hv_vcpu_set_sys_reg(cpu->accel->fd, hvf_sreg_match[i].reg, val);
+ ret = hv_vcpu_set_sys_reg(cpu->accel->fd, hvf_id, val);
assert_hvf_ok(ret);
}
@@ -922,14 +924,15 @@ int hvf_arch_init_vcpu(CPUState *cpu)
/* Populate cp list for all known sysregs */
for (i = 0; i < sregs_match_len; i++) {
- const ARMCPRegInfo *ri;
- uint32_t key = hvf_sreg_match[i].key;
+ int hvf_id = hvf_sreg_match[i].reg;
+ uint64_t kvm_id = HVF_TO_KVMID(hvf_id);
+ uint32_t key = kvm_to_cpreg_id(kvm_id);
+ const ARMCPRegInfo *ri = get_arm_cp_reginfo(arm_cpu->cp_regs, key);
- ri = get_arm_cp_reginfo(arm_cpu->cp_regs, key);
if (ri) {
assert(!(ri->type & ARM_CP_NO_RAW));
hvf_sreg_match[i].cp_idx = sregs_cnt;
- arm_cpu->cpreg_indexes[sregs_cnt++] = cpreg_to_kvm_id(key);
+ arm_cpu->cpreg_indexes[sregs_cnt++] = kvm_id;
} else {
hvf_sreg_match[i].cp_idx = -1;
}
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* [PATCH v2 07/36] target/arm/hvf: Replace hvf_sreg_match with hvf_sreg_list
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (5 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 06/36] target/arm/hvf: Remove hvf_sreg_match.key Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 10:32 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 08/36] target/arm/hvf: Sort the cpreg_indexes array Richard Henderson
` (29 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell
Change hvf_get_registers and hvf_put_registers to iterate over
cpregs_indexes instead of hvf_sreg_match.
This lets us drop the cp_idx member of hvf_sreg_match, which leaves
only one member in the struct. Replace the struct with a const array.
Instead of int, use the proper enum type: hv_sys_reg_t.
Rename from hvf_sreg_match to hvf_sreg_list because there is no
longer any matching going on.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/hvf/hvf.c | 45 +++++++++++++++-----------------------------
1 file changed, 15 insertions(+), 30 deletions(-)
diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
index 98f49ce33a..b043eac8c6 100644
--- a/target/arm/hvf/hvf.c
+++ b/target/arm/hvf/hvf.c
@@ -394,11 +394,6 @@ static const struct hvf_reg_match hvf_fpreg_match[] = {
{ HV_SIMD_FP_REG_Q31, offsetof(CPUARMState, vfp.zregs[31]) },
};
-struct hvf_sreg_match {
- int reg;
- uint32_t cp_idx;
-};
-
/*
* QEMU uses KVM system register ids in the migration format.
* Conveniently, HVF uses the same encoding of the op* and cr* parameters
@@ -419,9 +414,9 @@ struct hvf_sreg_match {
#undef DEF_SYSREG
-#define DEF_SYSREG(HVF_ID, op0, op1, crn, crm, op2) { HVF_ID },
+#define DEF_SYSREG(HVF_ID, op0, op1, crn, crm, op2) HVF_ID,
-static struct hvf_sreg_match hvf_sreg_match[] = {
+static const hv_sys_reg_t hvf_sreg_list[] = {
#include "sysreg.c.inc"
};
@@ -434,7 +429,7 @@ int hvf_get_registers(CPUState *cpu)
hv_return_t ret;
uint64_t val;
hv_simd_fp_uchar16_t fpval;
- int i;
+ int i, n;
for (i = 0; i < ARRAY_SIZE(hvf_reg_match); i++) {
ret = hv_vcpu_get_reg(cpu->accel->fd, hvf_reg_match[i].reg, &val);
@@ -463,13 +458,9 @@ int hvf_get_registers(CPUState *cpu)
assert_hvf_ok(ret);
pstate_write(env, val);
- for (i = 0; i < ARRAY_SIZE(hvf_sreg_match); i++) {
- int hvf_id = hvf_sreg_match[i].reg;
- uint64_t kvm_id = HVF_TO_KVMID(hvf_id);
-
- if (hvf_sreg_match[i].cp_idx == -1) {
- continue;
- }
+ for (i = 0, n = arm_cpu->cpreg_array_len; i < n; i++) {
+ uint64_t kvm_id = arm_cpu->cpreg_indexes[i];
+ int hvf_id = KVMID_TO_HVF(kvm_id);
if (cpu->accel->guest_debug_enabled) {
/* Handle debug registers */
@@ -553,7 +544,7 @@ int hvf_get_registers(CPUState *cpu)
val = read_raw_cp_reg(env, ri);
- arm_cpu->cpreg_values[hvf_sreg_match[i].cp_idx] = val;
+ arm_cpu->cpreg_values[i] = val;
continue;
}
}
@@ -562,7 +553,7 @@ int hvf_get_registers(CPUState *cpu)
ret = hv_vcpu_get_sys_reg(cpu->accel->fd, hvf_id, &val);
assert_hvf_ok(ret);
- arm_cpu->cpreg_values[hvf_sreg_match[i].cp_idx] = val;
+ arm_cpu->cpreg_values[i] = val;
}
assert(write_list_to_cpustate(arm_cpu));
@@ -578,7 +569,7 @@ int hvf_put_registers(CPUState *cpu)
hv_return_t ret;
uint64_t val;
hv_simd_fp_uchar16_t fpval;
- int i;
+ int i, n;
for (i = 0; i < ARRAY_SIZE(hvf_reg_match); i++) {
val = *(uint64_t *)((void *)env + hvf_reg_match[i].offset);
@@ -605,12 +596,9 @@ int hvf_put_registers(CPUState *cpu)
aarch64_save_sp(env, arm_current_el(env));
assert(write_cpustate_to_list(arm_cpu, false));
- for (i = 0; i < ARRAY_SIZE(hvf_sreg_match); i++) {
- int hvf_id = hvf_sreg_match[i].reg;
-
- if (hvf_sreg_match[i].cp_idx == -1) {
- continue;
- }
+ for (i = 0, n = arm_cpu->cpreg_array_len; i < n; i++) {
+ uint64_t kvm_id = arm_cpu->cpreg_indexes[i];
+ int hvf_id = KVMID_TO_HVF(kvm_id);
if (cpu->accel->guest_debug_enabled) {
/* Handle debug registers */
@@ -688,7 +676,7 @@ int hvf_put_registers(CPUState *cpu)
}
}
- val = arm_cpu->cpreg_values[hvf_sreg_match[i].cp_idx];
+ val = arm_cpu->cpreg_values[i];
ret = hv_vcpu_set_sys_reg(cpu->accel->fd, hvf_id, val);
assert_hvf_ok(ret);
}
@@ -899,7 +887,7 @@ int hvf_arch_init_vcpu(CPUState *cpu)
{
ARMCPU *arm_cpu = ARM_CPU(cpu);
CPUARMState *env = &arm_cpu->env;
- uint32_t sregs_match_len = ARRAY_SIZE(hvf_sreg_match);
+ uint32_t sregs_match_len = ARRAY_SIZE(hvf_sreg_list);
uint32_t sregs_cnt = 0;
uint64_t pfr;
hv_return_t ret;
@@ -924,17 +912,14 @@ int hvf_arch_init_vcpu(CPUState *cpu)
/* Populate cp list for all known sysregs */
for (i = 0; i < sregs_match_len; i++) {
- int hvf_id = hvf_sreg_match[i].reg;
+ hv_sys_reg_t hvf_id = hvf_sreg_list[i];
uint64_t kvm_id = HVF_TO_KVMID(hvf_id);
uint32_t key = kvm_to_cpreg_id(kvm_id);
const ARMCPRegInfo *ri = get_arm_cp_reginfo(arm_cpu->cp_regs, key);
if (ri) {
assert(!(ri->type & ARM_CP_NO_RAW));
- hvf_sreg_match[i].cp_idx = sregs_cnt;
arm_cpu->cpreg_indexes[sregs_cnt++] = kvm_id;
- } else {
- hvf_sreg_match[i].cp_idx = -1;
}
}
arm_cpu->cpreg_array_len = sregs_cnt;
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 07/36] target/arm/hvf: Replace hvf_sreg_match with hvf_sreg_list
2025-09-16 14:22 ` [PATCH v2 07/36] target/arm/hvf: Replace hvf_sreg_match with hvf_sreg_list Richard Henderson
@ 2025-09-25 10:32 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 10:32 UTC (permalink / raw)
To: Richard Henderson, qemu-devel; +Cc: qemu-arm, peter.maydell
On 16/9/25 16:22, Richard Henderson wrote:
> Change hvf_get_registers and hvf_put_registers to iterate over
> cpregs_indexes instead of hvf_sreg_match.
>
> This lets us drop the cp_idx member of hvf_sreg_match, which leaves
> only one member in the struct. Replace the struct with a const array.
> Instead of int, use the proper enum type: hv_sys_reg_t.
> Rename from hvf_sreg_match to hvf_sreg_list because there is no
> longer any matching going on.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/hvf/hvf.c | 45 +++++++++++++++-----------------------------
> 1 file changed, 15 insertions(+), 30 deletions(-)
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 08/36] target/arm/hvf: Sort the cpreg_indexes array
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (6 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 07/36] target/arm/hvf: Replace hvf_sreg_match with hvf_sreg_list Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 10:33 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 09/36] target/arm/hvf: Use raw_read, raw_write to access Richard Henderson
` (28 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/hvf/hvf.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
index b043eac8c6..99d8672b9b 100644
--- a/target/arm/hvf/hvf.c
+++ b/target/arm/hvf/hvf.c
@@ -925,6 +925,9 @@ int hvf_arch_init_vcpu(CPUState *cpu)
arm_cpu->cpreg_array_len = sregs_cnt;
arm_cpu->cpreg_vmstate_array_len = sregs_cnt;
+ /* cpreg tuples must be in strictly ascending order */
+ qsort(arm_cpu->cpreg_indexes, sregs_cnt, sizeof(uint64_t), compare_u64);
+
assert(write_cpustate_to_list(arm_cpu, false));
/* Set CP_NO_RAW system registers on init */
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 08/36] target/arm/hvf: Sort the cpreg_indexes array
2025-09-16 14:22 ` [PATCH v2 08/36] target/arm/hvf: Sort the cpreg_indexes array Richard Henderson
@ 2025-09-25 10:33 ` Philippe Mathieu-Daudé
2025-09-25 13:23 ` Peter Maydell
0 siblings, 1 reply; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 10:33 UTC (permalink / raw)
To: Richard Henderson, qemu-devel; +Cc: qemu-arm, peter.maydell
On 16/9/25 16:22, Richard Henderson wrote:
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/hvf/hvf.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
> index b043eac8c6..99d8672b9b 100644
> --- a/target/arm/hvf/hvf.c
> +++ b/target/arm/hvf/hvf.c
> @@ -925,6 +925,9 @@ int hvf_arch_init_vcpu(CPUState *cpu)
> arm_cpu->cpreg_array_len = sregs_cnt;
> arm_cpu->cpreg_vmstate_array_len = sregs_cnt;
>
> + /* cpreg tuples must be in strictly ascending order */
I don't get the "why". If this is related to a previous change,
maybe better to squash there?
Anyhow,
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> + qsort(arm_cpu->cpreg_indexes, sregs_cnt, sizeof(uint64_t), compare_u64);
> +
> assert(write_cpustate_to_list(arm_cpu, false));
>
> /* Set CP_NO_RAW system registers on init */
^ permalink raw reply [flat|nested] 87+ messages in thread
* Re: [PATCH v2 08/36] target/arm/hvf: Sort the cpreg_indexes array
2025-09-25 10:33 ` Philippe Mathieu-Daudé
@ 2025-09-25 13:23 ` Peter Maydell
2025-09-25 13:38 ` Philippe Mathieu-Daudé
0 siblings, 1 reply; 87+ messages in thread
From: Peter Maydell @ 2025-09-25 13:23 UTC (permalink / raw)
To: Philippe Mathieu-Daudé; +Cc: Richard Henderson, qemu-devel, qemu-arm
On Thu, 25 Sept 2025 at 11:33, Philippe Mathieu-Daudé <philmd@linaro.org> wrote:
>
> On 16/9/25 16:22, Richard Henderson wrote:
> > Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> > ---
> > target/arm/hvf/hvf.c | 3 +++
> > 1 file changed, 3 insertions(+)
> >
> > diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
> > index b043eac8c6..99d8672b9b 100644
> > --- a/target/arm/hvf/hvf.c
> > +++ b/target/arm/hvf/hvf.c
> > @@ -925,6 +925,9 @@ int hvf_arch_init_vcpu(CPUState *cpu)
> > arm_cpu->cpreg_array_len = sregs_cnt;
> > arm_cpu->cpreg_vmstate_array_len = sregs_cnt;
> >
> > + /* cpreg tuples must be in strictly ascending order */
>
> I don't get the "why". If this is related to a previous change,
> maybe better to squash there?
It's a requirement on the cpreg list data structure;
compare kvm_arm_init_cpreg_list()'s comment
/* Sort the list we get back from the kernel, since cpreg_tuples
* must be in strictly ascending order.
*/
and the one in init_cpreg_list():
/*
* Initialise the cpreg_tuples[] array based on the cp_regs hash.
* Note that we require cpreg_tuples[] to be sorted by key ID.
*/
The underlying reason for this is the algorithm we use
for incoming migration in cpu_post_load(), where we
iterate through the incoming-data list and the one
we have on the destination comparing indexes. This
only works if the list is in order so that we can
easily identify "register in our list but not theirs"
and "register in their list but not ours" by comparing
the next value in the index lists.
-- PMM
^ permalink raw reply [flat|nested] 87+ messages in thread* Re: [PATCH v2 08/36] target/arm/hvf: Sort the cpreg_indexes array
2025-09-25 13:23 ` Peter Maydell
@ 2025-09-25 13:38 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 13:38 UTC (permalink / raw)
To: Peter Maydell; +Cc: Richard Henderson, qemu-devel, qemu-arm
On 25/9/25 15:23, Peter Maydell wrote:
> On Thu, 25 Sept 2025 at 11:33, Philippe Mathieu-Daudé <philmd@linaro.org> wrote:
>>
>> On 16/9/25 16:22, Richard Henderson wrote:
>>> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
>>> ---
>>> target/arm/hvf/hvf.c | 3 +++
>>> 1 file changed, 3 insertions(+)
>>>
>>> diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
>>> index b043eac8c6..99d8672b9b 100644
>>> --- a/target/arm/hvf/hvf.c
>>> +++ b/target/arm/hvf/hvf.c
>>> @@ -925,6 +925,9 @@ int hvf_arch_init_vcpu(CPUState *cpu)
>>> arm_cpu->cpreg_array_len = sregs_cnt;
>>> arm_cpu->cpreg_vmstate_array_len = sregs_cnt;
>>>
>>> + /* cpreg tuples must be in strictly ascending order */
>>
>> I don't get the "why". If this is related to a previous change,
>> maybe better to squash there?
>
> It's a requirement on the cpreg list data structure;
> compare kvm_arm_init_cpreg_list()'s comment
> /* Sort the list we get back from the kernel, since cpreg_tuples
> * must be in strictly ascending order.
> */
> and the one in init_cpreg_list():
> /*
> * Initialise the cpreg_tuples[] array based on the cp_regs hash.
> * Note that we require cpreg_tuples[] to be sorted by key ID.
> */
>
> The underlying reason for this is the algorithm we use
> for incoming migration in cpu_post_load(), where we
> iterate through the incoming-data list and the one
> we have on the destination comparing indexes. This
> only works if the list is in order so that we can
> easily identify "register in our list but not theirs"
> and "register in their list but not ours" by comparing
> the next value in the index lists.
Thank you, this is very clear now. Could we centralize this knowledge
as a docstring comment in ARMCPU::cpreg_indexes? (This is where I
naturally looked, trying to understand).
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 09/36] target/arm/hvf: Use raw_read, raw_write to access
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (7 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 08/36] target/arm/hvf: Sort the cpreg_indexes array Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 10:35 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 10/36] target/arm: Use raw_write in cp_reg_reset Richard Henderson
` (27 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell
Reduce the places that know about field types by 2.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/hvf/hvf.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
index 99d8672b9b..694584cc13 100644
--- a/target/arm/hvf/hvf.c
+++ b/target/arm/hvf/hvf.c
@@ -1153,7 +1153,7 @@ static bool hvf_sysreg_read_cp(CPUState *cpu, uint32_t reg, uint64_t *val)
} else if (ri->readfn) {
*val = ri->readfn(env, ri);
} else {
- *val = CPREG_FIELD64(env, ri);
+ *val = raw_read(env, ri);
}
trace_hvf_vgic_read(ri->name, *val);
return true;
@@ -1435,7 +1435,7 @@ static bool hvf_sysreg_write_cp(CPUState *cpu, uint32_t reg, uint64_t val)
if (ri->writefn) {
ri->writefn(env, ri, val);
} else {
- CPREG_FIELD64(env, ri) = val;
+ raw_write(env, ri, val);
}
trace_hvf_vgic_write(ri->name, val);
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* [PATCH v2 10/36] target/arm: Use raw_write in cp_reg_reset
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (8 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 09/36] target/arm/hvf: Use raw_read, raw_write to access Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 10:36 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 11/36] target/arm: Rename all ARMCPRegInfo from opaque to ri Richard Henderson
` (26 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
Reduce the places that know about field types by 1.
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpu.c | 10 ++--------
1 file changed, 2 insertions(+), 8 deletions(-)
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index d0f6fcdfce..48d0f03098 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -192,14 +192,8 @@ static void cp_reg_reset(gpointer key, gpointer value, gpointer opaque)
* This is basically only used for fields in non-core coprocessors
* (like the pxa2xx ones).
*/
- if (!ri->fieldoffset) {
- return;
- }
-
- if (cpreg_field_is_64bit(ri)) {
- CPREG_FIELD64(&cpu->env, ri) = ri->resetvalue;
- } else {
- CPREG_FIELD32(&cpu->env, ri) = ri->resetvalue;
+ if (ri->fieldoffset) {
+ raw_write(&cpu->env, ri, ri->resetvalue);
}
}
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* [PATCH v2 11/36] target/arm: Rename all ARMCPRegInfo from opaque to ri
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (9 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 10/36] target/arm: Use raw_write in cp_reg_reset Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-23 10:31 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 12/36] target/arm: Drop define_one_arm_cp_reg_with_opaque Richard Henderson
` (25 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
These pointers are no opaque, they have a specific type.
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpregs.h | 10 +++++-----
target/arm/helper.c | 6 +++---
2 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/target/arm/cpregs.h b/target/arm/cpregs.h
index c9506aa6d5..3344a02bd3 100644
--- a/target/arm/cpregs.h
+++ b/target/arm/cpregs.h
@@ -841,15 +841,15 @@ typedef struct ARMCPRegInfo ARMCPRegInfo;
* Access functions for coprocessor registers. These cannot fail and
* may not raise exceptions.
*/
-typedef uint64_t CPReadFn(CPUARMState *env, const ARMCPRegInfo *opaque);
-typedef void CPWriteFn(CPUARMState *env, const ARMCPRegInfo *opaque,
+typedef uint64_t CPReadFn(CPUARMState *env, const ARMCPRegInfo *ri);
+typedef void CPWriteFn(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value);
/* Access permission check functions for coprocessor registers. */
typedef CPAccessResult CPAccessFn(CPUARMState *env,
- const ARMCPRegInfo *opaque,
+ const ARMCPRegInfo *ri,
bool isread);
/* Hook function for register reset */
-typedef void CPResetFn(CPUARMState *env, const ARMCPRegInfo *opaque);
+typedef void CPResetFn(CPUARMState *env, const ARMCPRegInfo *ri);
#define CP_ANY 0xff
@@ -1075,7 +1075,7 @@ void raw_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value);
* CPResetFn that does nothing, for use if no reset is required even
* if fieldoffset is non zero.
*/
-void arm_cp_reset_ignore(CPUARMState *env, const ARMCPRegInfo *opaque);
+void arm_cp_reset_ignore(CPUARMState *env, const ARMCPRegInfo *ri);
/*
* Return true if this reginfo struct's field in the cpu state struct
diff --git a/target/arm/helper.c b/target/arm/helper.c
index df9e0c7bca..4ba76c80b1 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -1073,7 +1073,7 @@ static const ARMCPRegInfo v6k_cp_reginfo[] = {
.resetvalue = 0 },
};
-static void arm_gt_cntfrq_reset(CPUARMState *env, const ARMCPRegInfo *opaque)
+static void arm_gt_cntfrq_reset(CPUARMState *env, const ARMCPRegInfo *ri)
{
ARMCPU *cpu = env_archcpu(env);
@@ -5426,7 +5426,7 @@ static const ARMCPRegInfo rndr_reginfo[] = {
.access = PL0_R, .readfn = rndr_readfn },
};
-static void dccvap_writefn(CPUARMState *env, const ARMCPRegInfo *opaque,
+static void dccvap_writefn(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
#ifdef CONFIG_TCG
@@ -7884,7 +7884,7 @@ uint64_t arm_cp_read_zero(CPUARMState *env, const ARMCPRegInfo *ri)
return 0;
}
-void arm_cp_reset_ignore(CPUARMState *env, const ARMCPRegInfo *opaque)
+void arm_cp_reset_ignore(CPUARMState *env, const ARMCPRegInfo *ri)
{
/* Helper coprocessor reset function for do-nothing-on-reset registers */
}
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 11/36] target/arm: Rename all ARMCPRegInfo from opaque to ri
2025-09-16 14:22 ` [PATCH v2 11/36] target/arm: Rename all ARMCPRegInfo from opaque to ri Richard Henderson
@ 2025-09-23 10:31 ` Philippe Mathieu-Daudé
2025-09-25 10:36 ` Philippe Mathieu-Daudé
0 siblings, 1 reply; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-23 10:31 UTC (permalink / raw)
To: Richard Henderson, qemu-devel
Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
On 16/9/25 16:22, Richard Henderson wrote:
> These pointers are no opaque, they have a specific type.
>
> Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/cpregs.h | 10 +++++-----
> target/arm/helper.c | 6 +++---
> 2 files changed, 8 insertions(+), 8 deletions(-)
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* Re: [PATCH v2 11/36] target/arm: Rename all ARMCPRegInfo from opaque to ri
2025-09-23 10:31 ` Philippe Mathieu-Daudé
@ 2025-09-25 10:36 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 10:36 UTC (permalink / raw)
To: Richard Henderson, qemu-devel
Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
On 23/9/25 12:31, Philippe Mathieu-Daudé wrote:
> On 16/9/25 16:22, Richard Henderson wrote:
>> These pointers are no opaque, they have a specific type.
>>
>> Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
>> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
>> ---
>> target/arm/cpregs.h | 10 +++++-----
>> target/arm/helper.c | 6 +++---
>> 2 files changed, 8 insertions(+), 8 deletions(-)
>
> Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
FWIW:
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 12/36] target/arm: Drop define_one_arm_cp_reg_with_opaque
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (10 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 11/36] target/arm: Rename all ARMCPRegInfo from opaque to ri Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-23 10:44 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 13/36] target/arm: Restrict the scope of CPREG_FIELD32, CPREG_FIELD64 Richard Henderson
` (24 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
The last use of this interface was removed in 603bc048a27f
("hw/arm: Remove pxa2xx_pic"). As the comment in gicv3
stated, keeping pointer references to cpregs has SMP issues,
so avoid future temptation by removing the interface.
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpregs.h | 32 ++++++++------------------------
hw/intc/arm_gicv3_cpuif.c | 10 +---------
target/arm/helper.c | 29 +++++++++++------------------
3 files changed, 20 insertions(+), 51 deletions(-)
diff --git a/target/arm/cpregs.h b/target/arm/cpregs.h
index 3344a02bd3..b610716c24 100644
--- a/target/arm/cpregs.h
+++ b/target/arm/cpregs.h
@@ -906,11 +906,7 @@ struct ARMCPRegInfo {
*/
uint32_t nv2_redirect_offset;
- /*
- * The opaque pointer passed to define_arm_cp_regs_with_opaque() when
- * this register was defined: can be used to hand data through to the
- * register read/write functions, since they are passed the ARMCPRegInfo*.
- */
+ /* This is used only by VHE. */
void *opaque;
/*
* Value of this register, if it is ARM_CP_CONST. Otherwise, if
@@ -1004,27 +1000,15 @@ struct ARMCPRegInfo {
#define CPREG_FIELD64(env, ri) \
(*(uint64_t *)((char *)(env) + (ri)->fieldoffset))
-void define_one_arm_cp_reg_with_opaque(ARMCPU *cpu, const ARMCPRegInfo *reg,
- void *opaque);
+void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *regs);
+void define_arm_cp_regs_len(ARMCPU *cpu, const ARMCPRegInfo *regs, size_t len);
-static inline void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *regs)
-{
- define_one_arm_cp_reg_with_opaque(cpu, regs, NULL);
-}
-
-void define_arm_cp_regs_with_opaque_len(ARMCPU *cpu, const ARMCPRegInfo *regs,
- void *opaque, size_t len);
-
-#define define_arm_cp_regs_with_opaque(CPU, REGS, OPAQUE) \
- do { \
- QEMU_BUILD_BUG_ON(ARRAY_SIZE(REGS) == 0); \
- define_arm_cp_regs_with_opaque_len(CPU, REGS, OPAQUE, \
- ARRAY_SIZE(REGS)); \
+#define define_arm_cp_regs(CPU, REGS) \
+ do { \
+ QEMU_BUILD_BUG_ON(ARRAY_SIZE(REGS) == 0); \
+ define_arm_cp_regs_len(CPU, REGS, ARRAY_SIZE(REGS)); \
} while (0)
-#define define_arm_cp_regs(CPU, REGS) \
- define_arm_cp_regs_with_opaque(CPU, REGS, NULL)
-
const ARMCPRegInfo *get_arm_cp_reginfo(GHashTable *cpregs, uint32_t encoded_cp);
/*
@@ -1143,7 +1127,7 @@ static inline bool arm_cpreg_traps_in_nv(const ARMCPRegInfo *ri)
* means that the right set of registers is exactly those where
* the opc1 field is 4 or 5. (You can see this also in the assert
* we do that the opc1 field and the permissions mask line up in
- * define_one_arm_cp_reg_with_opaque().)
+ * define_one_arm_cp_reg().)
* Checking the opc1 field is easier for us and avoids the problem
* that we do not consistently use the right architectural names
* for all sysregs, since we treat the name field as largely for debug.
diff --git a/hw/intc/arm_gicv3_cpuif.c b/hw/intc/arm_gicv3_cpuif.c
index 4b4cf09157..72e91f971a 100644
--- a/hw/intc/arm_gicv3_cpuif.c
+++ b/hw/intc/arm_gicv3_cpuif.c
@@ -3037,15 +3037,7 @@ void gicv3_init_cpuif(GICv3State *s)
* cpu->gic_pribits
*/
- /* Note that we can't just use the GICv3CPUState as an opaque pointer
- * in define_arm_cp_regs_with_opaque(), because when we're called back
- * it might be with code translated by CPU 0 but run by CPU 1, in
- * which case we'd get the wrong value.
- * So instead we define the regs with no ri->opaque info, and
- * get back to the GICv3CPUState from the CPUARMState.
- *
- * These CP regs callbacks can be called from either TCG or HVF code.
- */
+ /* These CP regs callbacks can be called from either TCG or HVF. */
define_arm_cp_regs(cpu, gicv3_cpuif_reginfo);
/*
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 4ba76c80b1..5bc8fb23cc 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -7410,12 +7410,11 @@ void register_cp_regs_for_features(ARMCPU *cpu)
}
/*
- * Private utility function for define_one_arm_cp_reg_with_opaque():
+ * Private utility function for define_one_arm_cp_reg():
* add a single reginfo struct to the hash table.
*/
static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
- void *opaque, CPState state,
- CPSecureState secstate,
+ CPState state, CPSecureState secstate,
int crm, int opc1, int opc2,
const char *name)
{
@@ -7503,9 +7502,6 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
r2->opc2 = opc2;
r2->state = state;
r2->secure = secstate;
- if (opaque) {
- r2->opaque = opaque;
- }
if (make_const) {
/* This should not have been a very special register to begin. */
@@ -7610,8 +7606,7 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
}
-void define_one_arm_cp_reg_with_opaque(ARMCPU *cpu,
- const ARMCPRegInfo *r, void *opaque)
+void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
{
/*
* Define implementations of coprocessor registers.
@@ -7770,7 +7765,7 @@ void define_one_arm_cp_reg_with_opaque(ARMCPU *cpu,
if (nxs_ri.fgt) {
nxs_ri.fgt |= R_FGT_NXS_MASK;
}
- add_cpreg_to_hashtable(cpu, &nxs_ri, opaque, state,
+ add_cpreg_to_hashtable(cpu, &nxs_ri, state,
ARM_CP_SECSTATE_NS,
crm, opc1, opc2, name);
}
@@ -7784,17 +7779,17 @@ void define_one_arm_cp_reg_with_opaque(ARMCPU *cpu,
switch (r->secure) {
case ARM_CP_SECSTATE_S:
case ARM_CP_SECSTATE_NS:
- add_cpreg_to_hashtable(cpu, r, opaque, state,
+ add_cpreg_to_hashtable(cpu, r, state,
r->secure, crm, opc1, opc2,
r->name);
break;
case ARM_CP_SECSTATE_BOTH:
name = g_strdup_printf("%s_S", r->name);
- add_cpreg_to_hashtable(cpu, r, opaque, state,
+ add_cpreg_to_hashtable(cpu, r, state,
ARM_CP_SECSTATE_S,
crm, opc1, opc2, name);
g_free(name);
- add_cpreg_to_hashtable(cpu, r, opaque, state,
+ add_cpreg_to_hashtable(cpu, r, state,
ARM_CP_SECSTATE_NS,
crm, opc1, opc2, r->name);
break;
@@ -7806,7 +7801,7 @@ void define_one_arm_cp_reg_with_opaque(ARMCPU *cpu,
* AArch64 registers get mapped to non-secure instance
* of AArch32
*/
- add_cpreg_to_hashtable(cpu, r, opaque, state,
+ add_cpreg_to_hashtable(cpu, r, state,
ARM_CP_SECSTATE_NS,
crm, opc1, opc2, r->name);
}
@@ -7817,12 +7812,10 @@ void define_one_arm_cp_reg_with_opaque(ARMCPU *cpu,
}
/* Define a whole list of registers */
-void define_arm_cp_regs_with_opaque_len(ARMCPU *cpu, const ARMCPRegInfo *regs,
- void *opaque, size_t len)
+void define_arm_cp_regs_len(ARMCPU *cpu, const ARMCPRegInfo *regs, size_t len)
{
- size_t i;
- for (i = 0; i < len; ++i) {
- define_one_arm_cp_reg_with_opaque(cpu, regs + i, opaque);
+ for (size_t i = 0; i < len; ++i) {
+ define_one_arm_cp_reg(cpu, regs + i);
}
}
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 12/36] target/arm: Drop define_one_arm_cp_reg_with_opaque
2025-09-16 14:22 ` [PATCH v2 12/36] target/arm: Drop define_one_arm_cp_reg_with_opaque Richard Henderson
@ 2025-09-23 10:44 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-23 10:44 UTC (permalink / raw)
To: Richard Henderson, qemu-devel
Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
On 16/9/25 16:22, Richard Henderson wrote:
> The last use of this interface was removed in 603bc048a27f
> ("hw/arm: Remove pxa2xx_pic"). As the comment in gicv3
> stated, keeping pointer references to cpregs has SMP issues,
> so avoid future temptation by removing the interface.
>
> Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/cpregs.h | 32 ++++++++------------------------
> hw/intc/arm_gicv3_cpuif.c | 10 +---------
> target/arm/helper.c | 29 +++++++++++------------------
> 3 files changed, 20 insertions(+), 51 deletions(-)
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 13/36] target/arm: Restrict the scope of CPREG_FIELD32, CPREG_FIELD64
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (11 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 12/36] target/arm: Drop define_one_arm_cp_reg_with_opaque Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-23 10:37 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 14/36] target/arm: Replace cpreg_field_is_64bit with cpreg_field_type Richard Henderson
` (23 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpregs.h | 9 ---------
target/arm/helper.c | 12 ++++++++++++
2 files changed, 12 insertions(+), 9 deletions(-)
diff --git a/target/arm/cpregs.h b/target/arm/cpregs.h
index b610716c24..812fb1340a 100644
--- a/target/arm/cpregs.h
+++ b/target/arm/cpregs.h
@@ -991,15 +991,6 @@ struct ARMCPRegInfo {
CPAccessFn *orig_accessfn;
};
-/*
- * Macros which are lvalues for the field in CPUARMState for the
- * ARMCPRegInfo *ri.
- */
-#define CPREG_FIELD32(env, ri) \
- (*(uint32_t *)((char *)(env) + (ri)->fieldoffset))
-#define CPREG_FIELD64(env, ri) \
- (*(uint64_t *)((char *)(env) + (ri)->fieldoffset))
-
void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *regs);
void define_arm_cp_regs_len(ARMCPU *cpu, const ARMCPRegInfo *regs, size_t len);
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 5bc8fb23cc..b310f52724 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -51,6 +51,15 @@ int compare_u64(const void *a, const void *b)
return 0;
}
+/*
+ * Macros which are lvalues for the field in CPUARMState for the
+ * ARMCPRegInfo *ri.
+ */
+#define CPREG_FIELD32(env, ri) \
+ (*(uint32_t *)((char *)(env) + (ri)->fieldoffset))
+#define CPREG_FIELD64(env, ri) \
+ (*(uint64_t *)((char *)(env) + (ri)->fieldoffset))
+
uint64_t raw_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
assert(ri->fieldoffset);
@@ -71,6 +80,9 @@ void raw_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
}
}
+#undef CPREG_FIELD32
+#undef CPREG_FIELD64
+
static void *raw_ptr(CPUARMState *env, const ARMCPRegInfo *ri)
{
return (char *)env + ri->fieldoffset;
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* [PATCH v2 14/36] target/arm: Replace cpreg_field_is_64bit with cpreg_field_type
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (12 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 13/36] target/arm: Restrict the scope of CPREG_FIELD32, CPREG_FIELD64 Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 10:37 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 15/36] target/arm: Add CP_REG_AA32_64BIT_{SHIFT,MASK} Richard Henderson
` (22 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
Prepare for 128-bit fields by using a better query api.
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpregs.h | 10 ++++++----
target/arm/gdbstub.c | 7 +++++--
target/arm/helper.c | 18 +++++++++++++-----
3 files changed, 24 insertions(+), 11 deletions(-)
diff --git a/target/arm/cpregs.h b/target/arm/cpregs.h
index 812fb1340a..b6c8eff0dd 100644
--- a/target/arm/cpregs.h
+++ b/target/arm/cpregs.h
@@ -22,6 +22,7 @@
#define TARGET_ARM_CPREGS_H
#include "hw/registerfields.h"
+#include "exec/memop.h"
#include "target/arm/kvm-consts.h"
#include "cpu.h"
@@ -1053,12 +1054,13 @@ void raw_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value);
void arm_cp_reset_ignore(CPUARMState *env, const ARMCPRegInfo *ri);
/*
- * Return true if this reginfo struct's field in the cpu state struct
- * is 64 bits wide.
+ * Return MO_32 if the field in CPUARMState is uint32_t or
+ * MO_64 if the field in CPUARMState is uint64_t.
*/
-static inline bool cpreg_field_is_64bit(const ARMCPRegInfo *ri)
+static inline MemOp cpreg_field_type(const ARMCPRegInfo *ri)
{
- return (ri->state == ARM_CP_STATE_AA64) || (ri->type & ARM_CP_64BIT);
+ return (ri->state == ARM_CP_STATE_AA64 || (ri->type & ARM_CP_64BIT)
+ ? MO_64 : MO_32);
}
static inline bool cp_access_ok(int current_el,
diff --git a/target/arm/gdbstub.c b/target/arm/gdbstub.c
index ce4497ad7c..e2fc389170 100644
--- a/target/arm/gdbstub.c
+++ b/target/arm/gdbstub.c
@@ -247,10 +247,13 @@ static int arm_gdb_get_sysreg(CPUState *cs, GByteArray *buf, int reg)
key = cpu->dyn_sysreg_feature.data.cpregs.keys[reg];
ri = get_arm_cp_reginfo(cpu->cp_regs, key);
if (ri) {
- if (cpreg_field_is_64bit(ri)) {
+ switch (cpreg_field_type(ri)) {
+ case MO_64:
return gdb_get_reg64(buf, (uint64_t)read_raw_cp_reg(env, ri));
- } else {
+ case MO_32:
return gdb_get_reg32(buf, (uint32_t)read_raw_cp_reg(env, ri));
+ default:
+ g_assert_not_reached();
}
}
return 0;
diff --git a/target/arm/helper.c b/target/arm/helper.c
index b310f52724..b7c483b0d9 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -63,20 +63,28 @@ int compare_u64(const void *a, const void *b)
uint64_t raw_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
assert(ri->fieldoffset);
- if (cpreg_field_is_64bit(ri)) {
+ switch (cpreg_field_type(ri)) {
+ case MO_64:
return CPREG_FIELD64(env, ri);
- } else {
+ case MO_32:
return CPREG_FIELD32(env, ri);
+ default:
+ g_assert_not_reached();
}
}
void raw_write(CPUARMState *env, const ARMCPRegInfo *ri, uint64_t value)
{
assert(ri->fieldoffset);
- if (cpreg_field_is_64bit(ri)) {
+ switch (cpreg_field_type(ri)) {
+ case MO_64:
CPREG_FIELD64(env, ri) = value;
- } else {
+ break;
+ case MO_32:
CPREG_FIELD32(env, ri) = value;
+ break;
+ default:
+ g_assert_not_reached();
}
}
@@ -2754,7 +2762,7 @@ static void vmsa_ttbr_write(CPUARMState *env, const ARMCPRegInfo *ri,
uint64_t value)
{
/* If the ASID changes (with a 64-bit write), we must flush the TLB. */
- if (cpreg_field_is_64bit(ri) &&
+ if (cpreg_field_type(ri) == MO_64 &&
extract64(raw_read(env, ri) ^ value, 48, 16) != 0) {
ARMCPU *cpu = env_archcpu(env);
tlb_flush(CPU(cpu));
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 14/36] target/arm: Replace cpreg_field_is_64bit with cpreg_field_type
2025-09-16 14:22 ` [PATCH v2 14/36] target/arm: Replace cpreg_field_is_64bit with cpreg_field_type Richard Henderson
@ 2025-09-25 10:37 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 10:37 UTC (permalink / raw)
To: Richard Henderson, qemu-devel
Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
On 16/9/25 16:22, Richard Henderson wrote:
> Prepare for 128-bit fields by using a better query api.
>
> Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/cpregs.h | 10 ++++++----
> target/arm/gdbstub.c | 7 +++++--
> target/arm/helper.c | 18 +++++++++++++-----
> 3 files changed, 24 insertions(+), 11 deletions(-)
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 15/36] target/arm: Add CP_REG_AA32_64BIT_{SHIFT,MASK}
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (13 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 14/36] target/arm: Replace cpreg_field_is_64bit with cpreg_field_type Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 10:38 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 16/36] target/arm: Rename CP_REG_AA32_NS_{SHIFT,MASK} Richard Henderson
` (21 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
Give a name to the bit we're already using.
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpregs.h | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/target/arm/cpregs.h b/target/arm/cpregs.h
index b6c8eff0dd..3dc4c9927b 100644
--- a/target/arm/cpregs.h
+++ b/target/arm/cpregs.h
@@ -178,9 +178,14 @@ enum {
#define CP_REG_NS_SHIFT 29
#define CP_REG_NS_MASK (1 << CP_REG_NS_SHIFT)
+/* Distinguish 32-bit and 64-bit views of AArch32 system registers. */
+#define CP_REG_AA32_64BIT_SHIFT 15
+#define CP_REG_AA32_64BIT_MASK (1 << CP_REG_AA32_64BIT_SHIFT)
+
#define ENCODE_CP_REG(cp, is64, ns, crn, crm, opc1, opc2) \
- ((ns) << CP_REG_NS_SHIFT | ((cp) << 16) | ((is64) << 15) | \
- ((crn) << 11) | ((crm) << 7) | ((opc1) << 3) | (opc2))
+ (((ns) << CP_REG_NS_SHIFT) | \
+ ((is64) << CP_REG_AA32_64BIT_SHIFT) | \
+ ((cp) << 16) | ((crn) << 11) | ((crm) << 7) | ((opc1) << 3) | (opc2))
#define ENCODE_AA64_CP_REG(cp, crn, crm, op0, op1, op2) \
(CP_REG_AA64_MASK | \
@@ -202,7 +207,7 @@ static inline uint32_t kvm_to_cpreg_id(uint64_t kvmid)
cpregid |= CP_REG_AA64_MASK;
} else {
if ((kvmid & CP_REG_SIZE_MASK) == CP_REG_SIZE_U64) {
- cpregid |= (1 << 15);
+ cpregid |= CP_REG_AA32_64BIT_MASK;
}
/*
@@ -226,8 +231,8 @@ static inline uint64_t cpreg_to_kvm_id(uint32_t cpregid)
kvmid = cpregid & ~CP_REG_AA64_MASK;
kvmid |= CP_REG_SIZE_U64 | CP_REG_ARM64;
} else {
- kvmid = cpregid & ~(1 << 15);
- if (cpregid & (1 << 15)) {
+ kvmid = cpregid & ~CP_REG_AA32_64BIT_MASK;
+ if (cpregid & CP_REG_AA32_64BIT_MASK) {
kvmid |= CP_REG_SIZE_U64 | CP_REG_ARM;
} else {
kvmid |= CP_REG_SIZE_U32 | CP_REG_ARM;
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* [PATCH v2 16/36] target/arm: Rename CP_REG_AA32_NS_{SHIFT,MASK}
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (14 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 15/36] target/arm: Add CP_REG_AA32_64BIT_{SHIFT,MASK} Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 10:39 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 17/36] target/arm: Convert init_cpreg_list to g_hash_table_foreach Richard Henderson
` (20 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
Rename from CP_REG_NS_* to emphasize this is specific to AArch32.
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpregs.h | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/target/arm/cpregs.h b/target/arm/cpregs.h
index 3dc4c9927b..7ebe404163 100644
--- a/target/arm/cpregs.h
+++ b/target/arm/cpregs.h
@@ -175,15 +175,15 @@ enum {
* add a bit to distinguish between secure and non-secure cpregs in the
* hashtable.
*/
-#define CP_REG_NS_SHIFT 29
-#define CP_REG_NS_MASK (1 << CP_REG_NS_SHIFT)
+#define CP_REG_AA32_NS_SHIFT 29
+#define CP_REG_AA32_NS_MASK (1 << CP_REG_AA32_NS_SHIFT)
/* Distinguish 32-bit and 64-bit views of AArch32 system registers. */
#define CP_REG_AA32_64BIT_SHIFT 15
#define CP_REG_AA32_64BIT_MASK (1 << CP_REG_AA32_64BIT_SHIFT)
#define ENCODE_CP_REG(cp, is64, ns, crn, crm, opc1, opc2) \
- (((ns) << CP_REG_NS_SHIFT) | \
+ (((ns) << CP_REG_AA32_NS_SHIFT) | \
((is64) << CP_REG_AA32_64BIT_SHIFT) | \
((cp) << 16) | ((crn) << 11) | ((crm) << 7) | ((opc1) << 3) | (opc2))
@@ -214,7 +214,7 @@ static inline uint32_t kvm_to_cpreg_id(uint64_t kvmid)
* KVM is always non-secure so add the NS flag on AArch32 register
* entries.
*/
- cpregid |= 1 << CP_REG_NS_SHIFT;
+ cpregid |= CP_REG_AA32_NS_MASK;
}
return cpregid;
}
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* [PATCH v2 17/36] target/arm: Convert init_cpreg_list to g_hash_table_foreach
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (15 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 16/36] target/arm: Rename CP_REG_AA32_NS_{SHIFT,MASK} Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 10:43 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 18/36] target/arm: Remove cp argument to ENCODE_AA64_CP_REG Richard Henderson
` (19 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell
Adjust count_cpreg and add_cpreg_to_list to be used with
g_hash_table_foreach instead of g_list_foreach. In this way we have
the ARMCPRegInfo pointer directly rather than having to look it up
from the key.
Delay the sorting of the cpreg_indexes until after add_cpreg_to_list.
This allows us to sort the data that we actually care about,
the kvm id, as computed within add_cpreg_to_list, instead of
having to repeatedly compute the kvm id within cpreg_key_compare.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/helper.c | 54 ++++++++++++++++++---------------------------
1 file changed, 21 insertions(+), 33 deletions(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index b7c483b0d9..cc924adbc7 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -229,11 +229,11 @@ bool write_list_to_cpustate(ARMCPU *cpu)
return ok;
}
-static void add_cpreg_to_list(gpointer key, gpointer opaque)
+static void add_cpreg_to_list(gpointer key, gpointer value, gpointer opaque)
{
ARMCPU *cpu = opaque;
uint32_t regidx = (uintptr_t)key;
- const ARMCPRegInfo *ri = get_arm_cp_reginfo(cpu->cp_regs, regidx);
+ const ARMCPRegInfo *ri = value;
if (!(ri->type & (ARM_CP_NO_RAW | ARM_CP_ALIAS))) {
cpu->cpreg_indexes[cpu->cpreg_array_len] = cpreg_to_kvm_id(regidx);
@@ -242,61 +242,49 @@ static void add_cpreg_to_list(gpointer key, gpointer opaque)
}
}
-static void count_cpreg(gpointer key, gpointer opaque)
+static void count_cpreg(gpointer key, gpointer value, gpointer opaque)
{
ARMCPU *cpu = opaque;
- const ARMCPRegInfo *ri;
-
- ri = g_hash_table_lookup(cpu->cp_regs, key);
+ const ARMCPRegInfo *ri = value;
if (!(ri->type & (ARM_CP_NO_RAW | ARM_CP_ALIAS))) {
cpu->cpreg_array_len++;
}
}
-static gint cpreg_key_compare(gconstpointer a, gconstpointer b, gpointer d)
-{
- uint64_t aidx = cpreg_to_kvm_id((uintptr_t)a);
- uint64_t bidx = cpreg_to_kvm_id((uintptr_t)b);
-
- if (aidx > bidx) {
- return 1;
- }
- if (aidx < bidx) {
- return -1;
- }
- return 0;
-}
-
void init_cpreg_list(ARMCPU *cpu)
{
/*
* Initialise the cpreg_tuples[] array based on the cp_regs hash.
* Note that we require cpreg_tuples[] to be sorted by key ID.
*/
- GList *keys;
int arraylen;
- keys = g_hash_table_get_keys(cpu->cp_regs);
- keys = g_list_sort_with_data(keys, cpreg_key_compare, NULL);
-
cpu->cpreg_array_len = 0;
-
- g_list_foreach(keys, count_cpreg, cpu);
+ g_hash_table_foreach(cpu->cp_regs, count_cpreg, cpu);
arraylen = cpu->cpreg_array_len;
- cpu->cpreg_indexes = g_new(uint64_t, arraylen);
- cpu->cpreg_values = g_new(uint64_t, arraylen);
- cpu->cpreg_vmstate_indexes = g_new(uint64_t, arraylen);
- cpu->cpreg_vmstate_values = g_new(uint64_t, arraylen);
- cpu->cpreg_vmstate_array_len = cpu->cpreg_array_len;
+ if (arraylen) {
+ cpu->cpreg_indexes = g_new(uint64_t, arraylen);
+ cpu->cpreg_values = g_new(uint64_t, arraylen);
+ cpu->cpreg_vmstate_indexes = g_new(uint64_t, arraylen);
+ cpu->cpreg_vmstate_values = g_new(uint64_t, arraylen);
+ } else {
+ cpu->cpreg_indexes = NULL;
+ cpu->cpreg_values = NULL;
+ cpu->cpreg_vmstate_indexes = NULL;
+ cpu->cpreg_vmstate_values = NULL;
+ }
+ cpu->cpreg_vmstate_array_len = arraylen;
cpu->cpreg_array_len = 0;
- g_list_foreach(keys, add_cpreg_to_list, cpu);
+ g_hash_table_foreach(cpu->cp_regs, add_cpreg_to_list, cpu);
assert(cpu->cpreg_array_len == arraylen);
- g_list_free(keys);
+ if (arraylen) {
+ qsort(cpu->cpreg_indexes, arraylen, sizeof(uint64_t), compare_u64);
+ }
}
bool arm_pan_enabled(CPUARMState *env)
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 17/36] target/arm: Convert init_cpreg_list to g_hash_table_foreach
2025-09-16 14:22 ` [PATCH v2 17/36] target/arm: Convert init_cpreg_list to g_hash_table_foreach Richard Henderson
@ 2025-09-25 10:43 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 10:43 UTC (permalink / raw)
To: Richard Henderson, qemu-devel; +Cc: qemu-arm, peter.maydell
On 16/9/25 16:22, Richard Henderson wrote:
> Adjust count_cpreg and add_cpreg_to_list to be used with
> g_hash_table_foreach instead of g_list_foreach. In this way we have
> the ARMCPRegInfo pointer directly rather than having to look it up
> from the key.
>
> Delay the sorting of the cpreg_indexes until after add_cpreg_to_list.
> This allows us to sort the data that we actually care about,
> the kvm id, as computed within add_cpreg_to_list, instead of
> having to repeatedly compute the kvm id within cpreg_key_compare.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/helper.c | 54 ++++++++++++++++++---------------------------
> 1 file changed, 21 insertions(+), 33 deletions(-)
Is this the why for "target/arm/hvf: Sort the cpreg_indexes array"?
If so, maybe move the other patch previous this one?
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 18/36] target/arm: Remove cp argument to ENCODE_AA64_CP_REG
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (16 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 17/36] target/arm: Convert init_cpreg_list to g_hash_table_foreach Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 10:45 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 19/36] target/arm: Reorder ENCODE_AA64_CP_REG arguments Richard Henderson
` (18 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
All invocations were required to pass the same value,
CP_REG_ARM64_SYSREG_CP. Bake that in to the result directly.
Remove CP_REG_ARM64_SYSREG_CP as unused.
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpregs.h | 5 ++---
target/arm/kvm-consts.h | 3 ---
target/arm/helper.c | 11 +++++------
target/arm/hvf/hvf.c | 3 +--
target/arm/tcg/translate-a64.c | 6 ++----
5 files changed, 10 insertions(+), 18 deletions(-)
diff --git a/target/arm/cpregs.h b/target/arm/cpregs.h
index 7ebe404163..95b0b9c78e 100644
--- a/target/arm/cpregs.h
+++ b/target/arm/cpregs.h
@@ -187,9 +187,8 @@ enum {
((is64) << CP_REG_AA32_64BIT_SHIFT) | \
((cp) << 16) | ((crn) << 11) | ((crm) << 7) | ((opc1) << 3) | (opc2))
-#define ENCODE_AA64_CP_REG(cp, crn, crm, op0, op1, op2) \
- (CP_REG_AA64_MASK | \
- ((cp) << CP_REG_ARM_COPROC_SHIFT) | \
+#define ENCODE_AA64_CP_REG(crn, crm, op0, op1, op2) \
+ (CP_REG_AA64_MASK | CP_REG_ARM64_SYSREG | \
((op0) << CP_REG_ARM64_SYSREG_OP0_SHIFT) | \
((op1) << CP_REG_ARM64_SYSREG_OP1_SHIFT) | \
((crn) << CP_REG_ARM64_SYSREG_CRN_SHIFT) | \
diff --git a/target/arm/kvm-consts.h b/target/arm/kvm-consts.h
index fdb305eea1..54ae5da7ce 100644
--- a/target/arm/kvm-consts.h
+++ b/target/arm/kvm-consts.h
@@ -160,9 +160,6 @@ MISMATCH_CHECK(QEMU_KVM_ARM_TARGET_CORTEX_A53, KVM_ARM_TARGET_CORTEX_A53);
#define CP_REG_ARM64_SYSREG_OP2_MASK 0x0000000000000007
#define CP_REG_ARM64_SYSREG_OP2_SHIFT 0
-/* No kernel define but it's useful to QEMU */
-#define CP_REG_ARM64_SYSREG_CP (CP_REG_ARM64_SYSREG >> CP_REG_ARM_COPROC_SHIFT)
-
MISMATCH_CHECK(CP_REG_ARM64, KVM_REG_ARM64);
MISMATCH_CHECK(CP_REG_ARM_COPROC_MASK, KVM_REG_ARM_COPROC_MASK);
MISMATCH_CHECK(CP_REG_ARM_COPROC_SHIFT, KVM_REG_ARM_COPROC_SHIFT);
diff --git a/target/arm/helper.c b/target/arm/helper.c
index cc924adbc7..7094b63f82 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -4542,7 +4542,7 @@ static void define_arm_vh_e2h_redirects_aliases(ARMCPU *cpu)
};
#define K(op0, op1, crn, crm, op2) \
- ENCODE_AA64_CP_REG(CP_REG_ARM64_SYSREG_CP, crn, crm, op0, op1, op2)
+ ENCODE_AA64_CP_REG(crn, crm, op0, op1, op2)
static const struct E2HAlias aliases[] = {
{ K(3, 0, 1, 0, 0), K(3, 4, 1, 0, 0), K(3, 5, 1, 0, 0),
@@ -7451,10 +7451,9 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
* in their AArch64 view (the .cp value may be non-zero for the
* benefit of the AArch32 view).
*/
- if (cp == 0 || r->state == ARM_CP_STATE_BOTH) {
- cp = CP_REG_ARM64_SYSREG_CP;
- }
- key = ENCODE_AA64_CP_REG(cp, r->crn, crm, r->opc0, opc1, opc2);
+ assert(cp == 0 || r->state == ARM_CP_STATE_BOTH);
+ cp = 0;
+ key = ENCODE_AA64_CP_REG(r->crn, crm, r->opc0, opc1, opc2);
break;
default:
g_assert_not_reached();
@@ -7679,7 +7678,7 @@ void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
}
break;
case ARM_CP_STATE_AA64:
- assert(r->cp == 0 || r->cp == CP_REG_ARM64_SYSREG_CP);
+ assert(r->cp == 0);
break;
default:
g_assert_not_reached();
diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
index 694584cc13..6e67d89163 100644
--- a/target/arm/hvf/hvf.c
+++ b/target/arm/hvf/hvf.c
@@ -1124,8 +1124,7 @@ static bool is_id_sysreg(uint32_t reg)
static uint32_t hvf_reg2cp_reg(uint32_t reg)
{
- return ENCODE_AA64_CP_REG(CP_REG_ARM64_SYSREG_CP,
- (reg >> SYSREG_CRN_SHIFT) & SYSREG_CRN_MASK,
+ return ENCODE_AA64_CP_REG((reg >> SYSREG_CRN_SHIFT) & SYSREG_CRN_MASK,
(reg >> SYSREG_CRM_SHIFT) & SYSREG_CRM_MASK,
(reg >> SYSREG_OP0_SHIFT) & SYSREG_OP0_MASK,
(reg >> SYSREG_OP1_SHIFT) & SYSREG_OP1_MASK,
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 37bedc3780..a560ef0f42 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -2466,8 +2466,7 @@ static void handle_sys(DisasContext *s, bool isread,
unsigned int op0, unsigned int op1, unsigned int op2,
unsigned int crn, unsigned int crm, unsigned int rt)
{
- uint32_t key = ENCODE_AA64_CP_REG(CP_REG_ARM64_SYSREG_CP,
- crn, crm, op0, op1, op2);
+ uint32_t key = ENCODE_AA64_CP_REG(crn, crm, op0, op1, op2);
const ARMCPRegInfo *ri = get_arm_cp_reginfo(s->cp_regs, key);
bool need_exit_tb = false;
bool nv_trap_to_el2 = false;
@@ -2603,8 +2602,7 @@ static void handle_sys(DisasContext *s, bool isread,
* We don't use the EL1 register's access function, and
* fine-grained-traps on EL1 also do not apply here.
*/
- key = ENCODE_AA64_CP_REG(CP_REG_ARM64_SYSREG_CP,
- crn, crm, op0, 0, op2);
+ key = ENCODE_AA64_CP_REG(crn, crm, op0, 0, op2);
ri = get_arm_cp_reginfo(s->cp_regs, key);
assert(ri);
assert(cp_access_ok(s->current_el, ri, isread));
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 18/36] target/arm: Remove cp argument to ENCODE_AA64_CP_REG
2025-09-16 14:22 ` [PATCH v2 18/36] target/arm: Remove cp argument to ENCODE_AA64_CP_REG Richard Henderson
@ 2025-09-25 10:45 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 10:45 UTC (permalink / raw)
To: Richard Henderson, qemu-devel
Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
On 16/9/25 16:22, Richard Henderson wrote:
> All invocations were required to pass the same value,
> CP_REG_ARM64_SYSREG_CP. Bake that in to the result directly.
> Remove CP_REG_ARM64_SYSREG_CP as unused.
>
> Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/cpregs.h | 5 ++---
> target/arm/kvm-consts.h | 3 ---
> target/arm/helper.c | 11 +++++------
> target/arm/hvf/hvf.c | 3 +--
> target/arm/tcg/translate-a64.c | 6 ++----
> 5 files changed, 10 insertions(+), 18 deletions(-)
Well noticed.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 19/36] target/arm: Reorder ENCODE_AA64_CP_REG arguments
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (17 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 18/36] target/arm: Remove cp argument to ENCODE_AA64_CP_REG Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-23 10:47 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 20/36] target/arm: Split out add_cpreg_to_hashtable_aa{32, 64} Richard Henderson
` (17 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
The order of the parameters in the Arm ARM is
op0, op1, crn, crm, op2
Reorder the arguments of ENCODE_AA64_CP_REG to match.
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpregs.h | 2 +-
target/arm/helper.c | 4 ++--
target/arm/hvf/hvf.c | 6 +++---
target/arm/tcg/translate-a64.c | 4 ++--
4 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/target/arm/cpregs.h b/target/arm/cpregs.h
index 95b0b9c78e..7bdf6cf847 100644
--- a/target/arm/cpregs.h
+++ b/target/arm/cpregs.h
@@ -187,7 +187,7 @@ enum {
((is64) << CP_REG_AA32_64BIT_SHIFT) | \
((cp) << 16) | ((crn) << 11) | ((crm) << 7) | ((opc1) << 3) | (opc2))
-#define ENCODE_AA64_CP_REG(crn, crm, op0, op1, op2) \
+#define ENCODE_AA64_CP_REG(op0, op1, crn, crm, op2) \
(CP_REG_AA64_MASK | CP_REG_ARM64_SYSREG | \
((op0) << CP_REG_ARM64_SYSREG_OP0_SHIFT) | \
((op1) << CP_REG_ARM64_SYSREG_OP1_SHIFT) | \
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 7094b63f82..8b63eacb91 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -4542,7 +4542,7 @@ static void define_arm_vh_e2h_redirects_aliases(ARMCPU *cpu)
};
#define K(op0, op1, crn, crm, op2) \
- ENCODE_AA64_CP_REG(crn, crm, op0, op1, op2)
+ ENCODE_AA64_CP_REG(op0, op1, crn, crm, op2)
static const struct E2HAlias aliases[] = {
{ K(3, 0, 1, 0, 0), K(3, 4, 1, 0, 0), K(3, 5, 1, 0, 0),
@@ -7453,7 +7453,7 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
*/
assert(cp == 0 || r->state == ARM_CP_STATE_BOTH);
cp = 0;
- key = ENCODE_AA64_CP_REG(r->crn, crm, r->opc0, opc1, opc2);
+ key = ENCODE_AA64_CP_REG(r->opc0, opc1, r->crn, crm, opc2);
break;
default:
g_assert_not_reached();
diff --git a/target/arm/hvf/hvf.c b/target/arm/hvf/hvf.c
index 6e67d89163..8b467b3663 100644
--- a/target/arm/hvf/hvf.c
+++ b/target/arm/hvf/hvf.c
@@ -1124,10 +1124,10 @@ static bool is_id_sysreg(uint32_t reg)
static uint32_t hvf_reg2cp_reg(uint32_t reg)
{
- return ENCODE_AA64_CP_REG((reg >> SYSREG_CRN_SHIFT) & SYSREG_CRN_MASK,
- (reg >> SYSREG_CRM_SHIFT) & SYSREG_CRM_MASK,
- (reg >> SYSREG_OP0_SHIFT) & SYSREG_OP0_MASK,
+ return ENCODE_AA64_CP_REG((reg >> SYSREG_OP0_SHIFT) & SYSREG_OP0_MASK,
(reg >> SYSREG_OP1_SHIFT) & SYSREG_OP1_MASK,
+ (reg >> SYSREG_CRN_SHIFT) & SYSREG_CRN_MASK,
+ (reg >> SYSREG_CRM_SHIFT) & SYSREG_CRM_MASK,
(reg >> SYSREG_OP2_SHIFT) & SYSREG_OP2_MASK);
}
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index a560ef0f42..0ec309f1ea 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -2466,7 +2466,7 @@ static void handle_sys(DisasContext *s, bool isread,
unsigned int op0, unsigned int op1, unsigned int op2,
unsigned int crn, unsigned int crm, unsigned int rt)
{
- uint32_t key = ENCODE_AA64_CP_REG(crn, crm, op0, op1, op2);
+ uint32_t key = ENCODE_AA64_CP_REG(op0, op1, crn, crm, op2);
const ARMCPRegInfo *ri = get_arm_cp_reginfo(s->cp_regs, key);
bool need_exit_tb = false;
bool nv_trap_to_el2 = false;
@@ -2602,7 +2602,7 @@ static void handle_sys(DisasContext *s, bool isread,
* We don't use the EL1 register's access function, and
* fine-grained-traps on EL1 also do not apply here.
*/
- key = ENCODE_AA64_CP_REG(crn, crm, op0, 0, op2);
+ key = ENCODE_AA64_CP_REG(op0, 0, crn, crm, op2);
ri = get_arm_cp_reginfo(s->cp_regs, key);
assert(ri);
assert(cp_access_ok(s->current_el, ri, isread));
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 19/36] target/arm: Reorder ENCODE_AA64_CP_REG arguments
2025-09-16 14:22 ` [PATCH v2 19/36] target/arm: Reorder ENCODE_AA64_CP_REG arguments Richard Henderson
@ 2025-09-23 10:47 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-23 10:47 UTC (permalink / raw)
To: Richard Henderson, qemu-devel
Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
On 16/9/25 16:22, Richard Henderson wrote:
> The order of the parameters in the Arm ARM is
>
> op0, op1, crn, crm, op2
>
> Reorder the arguments of ENCODE_AA64_CP_REG to match.
>
> Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/cpregs.h | 2 +-
> target/arm/helper.c | 4 ++--
> target/arm/hvf/hvf.c | 6 +++---
> target/arm/tcg/translate-a64.c | 4 ++--
> 4 files changed, 8 insertions(+), 8 deletions(-)
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 20/36] target/arm: Split out add_cpreg_to_hashtable_aa{32, 64}
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (18 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 19/36] target/arm: Reorder ENCODE_AA64_CP_REG arguments Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 10:55 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 21/36] target/arm: Improve asserts in define_one_arm_cp_reg Richard Henderson
` (16 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell
The nesting level for the inner loop of define_one_arm_cp_reg
was overly deep. Split out that code into two functions, for
the AArch32 and AArch64 paths separately. Simplify the innermost
loop to a switch statement over r->state.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/helper.c | 147 +++++++++++++++++++++++---------------------
1 file changed, 76 insertions(+), 71 deletions(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 8b63eacb91..ec78c8f08f 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -7612,6 +7612,66 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
g_hash_table_insert(cpu->cp_regs, (gpointer)(uintptr_t)key, r2);
}
+static void add_cpreg_to_hashtable_aa32(ARMCPU *cpu, const ARMCPRegInfo *r,
+ int crm, int opc1, int opc2)
+{
+ /*
+ * Under AArch32 CP registers can be common
+ * (same for secure and non-secure world) or banked.
+ */
+ char *name;
+
+ assert(!(r->type & ARM_CP_ADD_TLBI_NXS)); /* aa64 only */
+
+ switch (r->secure) {
+ case ARM_CP_SECSTATE_S:
+ case ARM_CP_SECSTATE_NS:
+ add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32,
+ r->secure, crm, opc1, opc2, r->name);
+ break;
+ case ARM_CP_SECSTATE_BOTH:
+ name = g_strdup_printf("%s_S", r->name);
+ add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32,
+ ARM_CP_SECSTATE_S, crm, opc1, opc2, name);
+ g_free(name);
+ add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32,
+ ARM_CP_SECSTATE_NS, crm, opc1, opc2, r->name);
+ break;
+ default:
+ g_assert_not_reached();
+ }
+}
+
+static void add_cpreg_to_hashtable_aa64(ARMCPU *cpu, const ARMCPRegInfo *r,
+ int crm, int opc1, int opc2)
+{
+ if ((r->type & ARM_CP_ADD_TLBI_NXS) &&
+ cpu_isar_feature(aa64_xs, cpu)) {
+ /*
+ * This is a TLBI insn which has an NXS variant. The
+ * NXS variant is at the same encoding except that
+ * crn is +1, and has the same behaviour except for
+ * fine-grained trapping. Add the NXS insn here and
+ * then fall through to add the normal register.
+ * add_cpreg_to_hashtable() copies the cpreg struct
+ * and name that it is passed, so it's OK to use
+ * a local struct here.
+ */
+ ARMCPRegInfo nxs_ri = *r;
+ g_autofree char *name = g_strdup_printf("%sNXS", r->name);
+
+ assert(nxs_ri.crn < 0xf);
+ nxs_ri.crn++;
+ if (nxs_ri.fgt) {
+ nxs_ri.fgt |= R_FGT_NXS_MASK;
+ }
+ add_cpreg_to_hashtable(cpu, &nxs_ri, ARM_CP_STATE_AA64,
+ ARM_CP_SECSTATE_NS, crm, opc1, opc2, name);
+ }
+
+ add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA64, ARM_CP_SECSTATE_NS,
+ crm, opc1, opc2, r->name);
+}
void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
{
@@ -7639,14 +7699,12 @@ void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
* bits; the ARM_CP_64BIT* flag applies only to the AArch32 view of
* the register, if any.
*/
- int crm, opc1, opc2;
int crmmin = (r->crm == CP_ANY) ? 0 : r->crm;
int crmmax = (r->crm == CP_ANY) ? 15 : r->crm;
int opc1min = (r->opc1 == CP_ANY) ? 0 : r->opc1;
int opc1max = (r->opc1 == CP_ANY) ? 7 : r->opc1;
int opc2min = (r->opc2 == CP_ANY) ? 0 : r->opc2;
int opc2max = (r->opc2 == CP_ANY) ? 7 : r->opc2;
- CPState state;
/* 64 bit registers have only CRm and Opc1 fields */
assert(!((r->type & ARM_CP_64BIT) && (r->opc2 || r->crn)));
@@ -7743,75 +7801,22 @@ void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
}
}
- for (crm = crmmin; crm <= crmmax; crm++) {
- for (opc1 = opc1min; opc1 <= opc1max; opc1++) {
- for (opc2 = opc2min; opc2 <= opc2max; opc2++) {
- for (state = ARM_CP_STATE_AA32;
- state <= ARM_CP_STATE_AA64; state++) {
- if (r->state != state && r->state != ARM_CP_STATE_BOTH) {
- continue;
- }
- if ((r->type & ARM_CP_ADD_TLBI_NXS) &&
- cpu_isar_feature(aa64_xs, cpu)) {
- /*
- * This is a TLBI insn which has an NXS variant. The
- * NXS variant is at the same encoding except that
- * crn is +1, and has the same behaviour except for
- * fine-grained trapping. Add the NXS insn here and
- * then fall through to add the normal register.
- * add_cpreg_to_hashtable() copies the cpreg struct
- * and name that it is passed, so it's OK to use
- * a local struct here.
- */
- ARMCPRegInfo nxs_ri = *r;
- g_autofree char *name = g_strdup_printf("%sNXS", r->name);
-
- assert(state == ARM_CP_STATE_AA64);
- assert(nxs_ri.crn < 0xf);
- nxs_ri.crn++;
- if (nxs_ri.fgt) {
- nxs_ri.fgt |= R_FGT_NXS_MASK;
- }
- add_cpreg_to_hashtable(cpu, &nxs_ri, state,
- ARM_CP_SECSTATE_NS,
- crm, opc1, opc2, name);
- }
- if (state == ARM_CP_STATE_AA32) {
- /*
- * Under AArch32 CP registers can be common
- * (same for secure and non-secure world) or banked.
- */
- char *name;
-
- switch (r->secure) {
- case ARM_CP_SECSTATE_S:
- case ARM_CP_SECSTATE_NS:
- add_cpreg_to_hashtable(cpu, r, state,
- r->secure, crm, opc1, opc2,
- r->name);
- break;
- case ARM_CP_SECSTATE_BOTH:
- name = g_strdup_printf("%s_S", r->name);
- add_cpreg_to_hashtable(cpu, r, state,
- ARM_CP_SECSTATE_S,
- crm, opc1, opc2, name);
- g_free(name);
- add_cpreg_to_hashtable(cpu, r, state,
- ARM_CP_SECSTATE_NS,
- crm, opc1, opc2, r->name);
- break;
- default:
- g_assert_not_reached();
- }
- } else {
- /*
- * AArch64 registers get mapped to non-secure instance
- * of AArch32
- */
- add_cpreg_to_hashtable(cpu, r, state,
- ARM_CP_SECSTATE_NS,
- crm, opc1, opc2, r->name);
- }
+ for (int crm = crmmin; crm <= crmmax; crm++) {
+ for (int opc1 = opc1min; opc1 <= opc1max; opc1++) {
+ for (int opc2 = opc2min; opc2 <= opc2max; opc2++) {
+ switch (r->state) {
+ case ARM_CP_STATE_AA32:
+ add_cpreg_to_hashtable_aa32(cpu, r, crm, opc1, opc2);
+ break;
+ case ARM_CP_STATE_AA64:
+ add_cpreg_to_hashtable_aa64(cpu, r, crm, opc1, opc2);
+ break;
+ case ARM_CP_STATE_BOTH:
+ add_cpreg_to_hashtable_aa32(cpu, r, crm, opc1, opc2);
+ add_cpreg_to_hashtable_aa64(cpu, r, crm, opc1, opc2);
+ break;
+ default:
+ g_assert_not_reached();
}
}
}
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 20/36] target/arm: Split out add_cpreg_to_hashtable_aa{32, 64}
2025-09-16 14:22 ` [PATCH v2 20/36] target/arm: Split out add_cpreg_to_hashtable_aa{32, 64} Richard Henderson
@ 2025-09-25 10:55 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 10:55 UTC (permalink / raw)
To: Richard Henderson, qemu-devel; +Cc: qemu-arm, peter.maydell
On 16/9/25 16:22, Richard Henderson wrote:
> The nesting level for the inner loop of define_one_arm_cp_reg
> was overly deep. Split out that code into two functions, for
> the AArch32 and AArch64 paths separately. Simplify the innermost
> loop to a switch statement over r->state.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/helper.c | 147 +++++++++++++++++++++++---------------------
> 1 file changed, 76 insertions(+), 71 deletions(-)
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 21/36] target/arm: Improve asserts in define_one_arm_cp_reg
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (19 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 20/36] target/arm: Split out add_cpreg_to_hashtable_aa{32, 64} Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 10:59 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 22/36] target/arm: Move cp processing to define_one_arm_cp_reg Richard Henderson
` (15 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell
Reject ARM_CP_64BIT with ARM_CP_STATE_BOTH, because encoding
constrains prevent it from working. Remove some extra parens;
distribute ! across && to simplify.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/helper.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index ec78c8f08f..8a805695e7 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -7706,12 +7706,17 @@ void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
int opc2min = (r->opc2 == CP_ANY) ? 0 : r->opc2;
int opc2max = (r->opc2 == CP_ANY) ? 7 : r->opc2;
- /* 64 bit registers have only CRm and Opc1 fields */
- assert(!((r->type & ARM_CP_64BIT) && (r->opc2 || r->crn)));
+ /*
+ * AArch64 regs are all 64 bit so ARM_CP_64BIT is meaningless.
+ * Moreover, the encoding test just following in general prevents
+ * shared encoding so ARM_CP_STATE_BOTH won't work either.
+ */
+ assert(r->state == ARM_CP_STATE_AA32 || !(r->type & ARM_CP_64BIT));
+ /* AArch32 64-bit registers have only CRm and Opc1 fields. */
+ assert(!(r->type & ARM_CP_64BIT) || !(r->opc2 || r->crn));
/* op0 only exists in the AArch64 encodings */
- assert((r->state != ARM_CP_STATE_AA32) || (r->opc0 == 0));
- /* AArch64 regs are all 64 bit so ARM_CP_64BIT is meaningless */
- assert((r->state != ARM_CP_STATE_AA64) || !(r->type & ARM_CP_64BIT));
+ assert(r->state != ARM_CP_STATE_AA32 || r->opc0 == 0);
+
/*
* This API is only for Arm's system coprocessors (14 and 15) or
* (M-profile or v7A-and-earlier only) for implementation defined
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* [PATCH v2 22/36] target/arm: Move cp processing to define_one_arm_cp_reg
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (20 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 21/36] target/arm: Improve asserts in define_one_arm_cp_reg Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 11:00 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 23/36] target/arm: Move cpreg elimination " Richard Henderson
` (14 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell
Processing of cp was split between add_cpreg_to_hashtable and
define_one_arm_cp_reg. Unify it all to the top-level function.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/helper.c | 53 +++++++++++++++++++--------------------------
1 file changed, 22 insertions(+), 31 deletions(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 8a805695e7..0eedbacc2b 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -7423,7 +7423,7 @@ void register_cp_regs_for_features(ARMCPU *cpu)
*/
static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
CPState state, CPSecureState secstate,
- int crm, int opc1, int opc2,
+ int cp, int crm, int opc1, int opc2,
const char *name)
{
CPUARMState *env = &cpu->env;
@@ -7431,28 +7431,14 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
ARMCPRegInfo *r2;
bool is64 = r->type & ARM_CP_64BIT;
bool ns = secstate & ARM_CP_SECSTATE_NS;
- int cp = r->cp;
size_t name_len;
bool make_const;
switch (state) {
case ARM_CP_STATE_AA32:
- /* We assume it is a cp15 register if the .cp field is left unset. */
- if (cp == 0 && r->state == ARM_CP_STATE_BOTH) {
- cp = 15;
- }
key = ENCODE_CP_REG(cp, is64, ns, r->crn, crm, opc1, opc2);
break;
case ARM_CP_STATE_AA64:
- /*
- * To allow abbreviation of ARMCPRegInfo definitions, we treat
- * cp == 0 as equivalent to the value for "standard guest-visible
- * sysreg". STATE_BOTH definitions are also always "standard sysreg"
- * in their AArch64 view (the .cp value may be non-zero for the
- * benefit of the AArch32 view).
- */
- assert(cp == 0 || r->state == ARM_CP_STATE_BOTH);
- cp = 0;
key = ENCODE_AA64_CP_REG(r->opc0, opc1, r->crn, crm, opc2);
break;
default:
@@ -7613,7 +7599,7 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
}
static void add_cpreg_to_hashtable_aa32(ARMCPU *cpu, const ARMCPRegInfo *r,
- int crm, int opc1, int opc2)
+ int cp, int crm, int opc1, int opc2)
{
/*
* Under AArch32 CP registers can be common
@@ -7626,16 +7612,16 @@ static void add_cpreg_to_hashtable_aa32(ARMCPU *cpu, const ARMCPRegInfo *r,
switch (r->secure) {
case ARM_CP_SECSTATE_S:
case ARM_CP_SECSTATE_NS:
- add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32,
- r->secure, crm, opc1, opc2, r->name);
+ add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32, r->secure,
+ cp, crm, opc1, opc2, r->name);
break;
case ARM_CP_SECSTATE_BOTH:
name = g_strdup_printf("%s_S", r->name);
- add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32,
- ARM_CP_SECSTATE_S, crm, opc1, opc2, name);
+ add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32, ARM_CP_SECSTATE_S,
+ cp, crm, opc1, opc2, name);
g_free(name);
- add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32,
- ARM_CP_SECSTATE_NS, crm, opc1, opc2, r->name);
+ add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32, ARM_CP_SECSTATE_NS,
+ cp, crm, opc1, opc2, r->name);
break;
default:
g_assert_not_reached();
@@ -7666,11 +7652,11 @@ static void add_cpreg_to_hashtable_aa64(ARMCPU *cpu, const ARMCPRegInfo *r,
nxs_ri.fgt |= R_FGT_NXS_MASK;
}
add_cpreg_to_hashtable(cpu, &nxs_ri, ARM_CP_STATE_AA64,
- ARM_CP_SECSTATE_NS, crm, opc1, opc2, name);
+ ARM_CP_SECSTATE_NS, 0, crm, opc1, opc2, name);
}
add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA64, ARM_CP_SECSTATE_NS,
- crm, opc1, opc2, r->name);
+ 0, crm, opc1, opc2, r->name);
}
void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
@@ -7705,6 +7691,7 @@ void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
int opc1max = (r->opc1 == CP_ANY) ? 7 : r->opc1;
int opc2min = (r->opc2 == CP_ANY) ? 0 : r->opc2;
int opc2max = (r->opc2 == CP_ANY) ? 7 : r->opc2;
+ int cp = r->cp;
/*
* AArch64 regs are all 64 bit so ARM_CP_64BIT is meaningless.
@@ -7727,21 +7714,25 @@ void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
*/
switch (r->state) {
case ARM_CP_STATE_BOTH:
- /* 0 has a special meaning, but otherwise the same rules as AA32. */
- if (r->cp == 0) {
+ /*
+ * If the cp field is left unset, assume cp15.
+ * Otherwise apply the same rules as AA32.
+ */
+ if (cp == 0) {
+ cp = 15;
break;
}
/* fall through */
case ARM_CP_STATE_AA32:
if (arm_feature(&cpu->env, ARM_FEATURE_V8) &&
!arm_feature(&cpu->env, ARM_FEATURE_M)) {
- assert(r->cp >= 14 && r->cp <= 15);
+ assert(cp >= 14 && cp <= 15);
} else {
- assert(r->cp < 8 || (r->cp >= 14 && r->cp <= 15));
+ assert(cp < 8 || (cp >= 14 && cp <= 15));
}
break;
case ARM_CP_STATE_AA64:
- assert(r->cp == 0);
+ assert(cp == 0);
break;
default:
g_assert_not_reached();
@@ -7811,13 +7802,13 @@ void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
for (int opc2 = opc2min; opc2 <= opc2max; opc2++) {
switch (r->state) {
case ARM_CP_STATE_AA32:
- add_cpreg_to_hashtable_aa32(cpu, r, crm, opc1, opc2);
+ add_cpreg_to_hashtable_aa32(cpu, r, cp, crm, opc1, opc2);
break;
case ARM_CP_STATE_AA64:
add_cpreg_to_hashtable_aa64(cpu, r, crm, opc1, opc2);
break;
case ARM_CP_STATE_BOTH:
- add_cpreg_to_hashtable_aa32(cpu, r, crm, opc1, opc2);
+ add_cpreg_to_hashtable_aa32(cpu, r, cp, crm, opc1, opc2);
add_cpreg_to_hashtable_aa64(cpu, r, crm, opc1, opc2);
break;
default:
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* [PATCH v2 23/36] target/arm: Move cpreg elimination to define_one_arm_cp_reg
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (21 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 22/36] target/arm: Move cp processing to define_one_arm_cp_reg Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 13:27 ` Philippe Mathieu-Daudé
2025-09-25 13:44 ` Peter Maydell
2025-09-16 14:22 ` [PATCH v2 24/36] target/arm: Add key parameter to add_cpreg_to_hashtable Richard Henderson
` (13 subsequent siblings)
36 siblings, 2 replies; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell
Eliminate unused registers earlier, so that by the time we
arrive in add_cpreg_to_hashtable we never skip.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/helper.c | 123 +++++++++++++++++++++++---------------------
1 file changed, 64 insertions(+), 59 deletions(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 0eedbacc2b..4a109a113d 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -7432,7 +7432,6 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
bool is64 = r->type & ARM_CP_64BIT;
bool ns = secstate & ARM_CP_SECSTATE_NS;
size_t name_len;
- bool make_const;
switch (state) {
case ARM_CP_STATE_AA32:
@@ -7453,32 +7452,6 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
}
}
- /*
- * Eliminate registers that are not present because the EL is missing.
- * Doing this here makes it easier to put all registers for a given
- * feature into the same ARMCPRegInfo array and define them all at once.
- */
- make_const = false;
- if (arm_feature(env, ARM_FEATURE_EL3)) {
- /*
- * An EL2 register without EL2 but with EL3 is (usually) RES0.
- * See rule RJFFP in section D1.1.3 of DDI0487H.a.
- */
- int min_el = ctz32(r->access) / 2;
- if (min_el == 2 && !arm_feature(env, ARM_FEATURE_EL2)) {
- if (r->type & ARM_CP_EL3_NO_EL2_UNDEF) {
- return;
- }
- make_const = !(r->type & ARM_CP_EL3_NO_EL2_KEEP);
- }
- } else {
- CPAccessRights max_el = (arm_feature(env, ARM_FEATURE_EL2)
- ? PL2_RW : PL1_RW);
- if ((r->access & max_el) == 0) {
- return;
- }
- }
-
/* Combine cpreg and name into one allocation. */
name_len = strlen(name) + 1;
r2 = g_malloc(sizeof(*r2) + name_len);
@@ -7496,38 +7469,7 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
r2->state = state;
r2->secure = secstate;
- if (make_const) {
- /* This should not have been a very special register to begin. */
- int old_special = r2->type & ARM_CP_SPECIAL_MASK;
- assert(old_special == 0 || old_special == ARM_CP_NOP);
- /*
- * Set the special function to CONST, retaining the other flags.
- * This is important for e.g. ARM_CP_SVE so that we still
- * take the SVE trap if CPTR_EL3.EZ == 0.
- */
- r2->type = (r2->type & ~ARM_CP_SPECIAL_MASK) | ARM_CP_CONST;
- /*
- * Usually, these registers become RES0, but there are a few
- * special cases like VPIDR_EL2 which have a constant non-zero
- * value with writes ignored.
- */
- if (!(r->type & ARM_CP_EL3_NO_EL2_C_NZ)) {
- r2->resetvalue = 0;
- }
- /*
- * ARM_CP_CONST has precedence, so removing the callbacks and
- * offsets are not strictly necessary, but it is potentially
- * less confusing to debug later.
- */
- r2->readfn = NULL;
- r2->writefn = NULL;
- r2->raw_readfn = NULL;
- r2->raw_writefn = NULL;
- r2->resetfn = NULL;
- r2->fieldoffset = 0;
- r2->bank_fieldoffsets[0] = 0;
- r2->bank_fieldoffsets[1] = 0;
- } else {
+ {
bool isbanked = r->bank_fieldoffsets[0] && r->bank_fieldoffsets[1];
if (isbanked) {
@@ -7692,6 +7634,8 @@ void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
int opc2min = (r->opc2 == CP_ANY) ? 0 : r->opc2;
int opc2max = (r->opc2 == CP_ANY) ? 7 : r->opc2;
int cp = r->cp;
+ ARMCPRegInfo r_const;
+ CPUARMState *env = &cpu->env;
/*
* AArch64 regs are all 64 bit so ARM_CP_64BIT is meaningless.
@@ -7797,6 +7741,67 @@ void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
}
}
+ /*
+ * Eliminate registers that are not present because the EL is missing.
+ * Doing this here makes it easier to put all registers for a given
+ * feature into the same ARMCPRegInfo array and define them all at once.
+ */
+ if (arm_feature(env, ARM_FEATURE_EL3)) {
+ /*
+ * An EL2 register without EL2 but with EL3 is (usually) RES0.
+ * See rule RJFFP in section D1.1.3 of DDI0487H.a.
+ */
+ int min_el = ctz32(r->access) / 2;
+ if (min_el == 2 && !arm_feature(env, ARM_FEATURE_EL2)) {
+ if (r->type & ARM_CP_EL3_NO_EL2_UNDEF) {
+ return;
+ }
+ if (!(r->type & ARM_CP_EL3_NO_EL2_KEEP)) {
+ /* This should not have been a very special register. */
+ int old_special = r->type & ARM_CP_SPECIAL_MASK;
+ assert(old_special == 0 || old_special == ARM_CP_NOP);
+
+ r_const = *r;
+
+ /*
+ * Set the special function to CONST, retaining the other flags.
+ * This is important for e.g. ARM_CP_SVE so that we still
+ * take the SVE trap if CPTR_EL3.EZ == 0.
+ */
+ r_const.type = (r->type & ~ARM_CP_SPECIAL_MASK) | ARM_CP_CONST;
+ /*
+ * Usually, these registers become RES0, but there are a few
+ * special cases like VPIDR_EL2 which have a constant non-zero
+ * value with writes ignored.
+ */
+ if (!(r->type & ARM_CP_EL3_NO_EL2_C_NZ)) {
+ r_const.resetvalue = 0;
+ }
+ /*
+ * ARM_CP_CONST has precedence, so removing the callbacks and
+ * offsets are not strictly necessary, but it is potentially
+ * less confusing to debug later.
+ */
+ r_const.readfn = NULL;
+ r_const.writefn = NULL;
+ r_const.raw_readfn = NULL;
+ r_const.raw_writefn = NULL;
+ r_const.resetfn = NULL;
+ r_const.fieldoffset = 0;
+ r_const.bank_fieldoffsets[0] = 0;
+ r_const.bank_fieldoffsets[1] = 0;
+
+ r = &r_const;
+ }
+ }
+ } else {
+ CPAccessRights max_el = (arm_feature(env, ARM_FEATURE_EL2)
+ ? PL2_RW : PL1_RW);
+ if ((r->access & max_el) == 0) {
+ return;
+ }
+ }
+
for (int crm = crmmin; crm <= crmmax; crm++) {
for (int opc1 = opc1min; opc1 <= opc1max; opc1++) {
for (int opc2 = opc2min; opc2 <= opc2max; opc2++) {
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 23/36] target/arm: Move cpreg elimination to define_one_arm_cp_reg
2025-09-16 14:22 ` [PATCH v2 23/36] target/arm: Move cpreg elimination " Richard Henderson
@ 2025-09-25 13:27 ` Philippe Mathieu-Daudé
2025-09-25 13:44 ` Peter Maydell
1 sibling, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 13:27 UTC (permalink / raw)
To: Richard Henderson, qemu-devel; +Cc: qemu-arm, peter.maydell
On 16/9/25 16:22, Richard Henderson wrote:
> Eliminate unused registers earlier, so that by the time we
> arrive in add_cpreg_to_hashtable we never skip.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/helper.c | 123 +++++++++++++++++++++++---------------------
> 1 file changed, 64 insertions(+), 59 deletions(-)
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* Re: [PATCH v2 23/36] target/arm: Move cpreg elimination to define_one_arm_cp_reg
2025-09-16 14:22 ` [PATCH v2 23/36] target/arm: Move cpreg elimination " Richard Henderson
2025-09-25 13:27 ` Philippe Mathieu-Daudé
@ 2025-09-25 13:44 ` Peter Maydell
1 sibling, 0 replies; 87+ messages in thread
From: Peter Maydell @ 2025-09-25 13:44 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-devel, qemu-arm
On Tue, 16 Sept 2025 at 15:22, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> Eliminate unused registers earlier, so that by the time we
> arrive in add_cpreg_to_hashtable we never skip.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/helper.c | 123 +++++++++++++++++++++++---------------------
> 1 file changed, 64 insertions(+), 59 deletions(-)
>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
thanks
-- PMM
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 24/36] target/arm: Add key parameter to add_cpreg_to_hashtable
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (22 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 23/36] target/arm: Move cpreg elimination " Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 11:07 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 25/36] target/arm: Split out alloc_cpreg Richard Henderson
` (12 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell
Hoist the computation of key into the caller, where
state is a known constant.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/helper.c | 39 +++++++++++++++++++--------------------
1 file changed, 19 insertions(+), 20 deletions(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 4a109a113d..a5195e296d 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -7424,26 +7424,13 @@ void register_cp_regs_for_features(ARMCPU *cpu)
static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
CPState state, CPSecureState secstate,
int cp, int crm, int opc1, int opc2,
- const char *name)
+ const char *name, uint32_t key)
{
CPUARMState *env = &cpu->env;
- uint32_t key;
ARMCPRegInfo *r2;
- bool is64 = r->type & ARM_CP_64BIT;
bool ns = secstate & ARM_CP_SECSTATE_NS;
size_t name_len;
- switch (state) {
- case ARM_CP_STATE_AA32:
- key = ENCODE_CP_REG(cp, is64, ns, r->crn, crm, opc1, opc2);
- break;
- case ARM_CP_STATE_AA64:
- key = ENCODE_AA64_CP_REG(r->opc0, opc1, r->crn, crm, opc2);
- break;
- default:
- g_assert_not_reached();
- }
-
/* Overriding of an existing definition must be explicitly requested. */
if (!(r->type & ARM_CP_OVERRIDE)) {
const ARMCPRegInfo *oldreg = get_arm_cp_reginfo(cpu->cp_regs, key);
@@ -7548,22 +7535,28 @@ static void add_cpreg_to_hashtable_aa32(ARMCPU *cpu, const ARMCPRegInfo *r,
* (same for secure and non-secure world) or banked.
*/
char *name;
+ bool is64 = r->type & ARM_CP_64BIT;
+ uint32_t key = ENCODE_CP_REG(cp, is64, 0, r->crn, crm, opc1, opc2);
assert(!(r->type & ARM_CP_ADD_TLBI_NXS)); /* aa64 only */
switch (r->secure) {
- case ARM_CP_SECSTATE_S:
case ARM_CP_SECSTATE_NS:
+ key |= CP_REG_AA32_NS_MASK;
+ /* fall through */
+ case ARM_CP_SECSTATE_S:
add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32, r->secure,
- cp, crm, opc1, opc2, r->name);
+ cp, crm, opc1, opc2, r->name, key);
break;
case ARM_CP_SECSTATE_BOTH:
name = g_strdup_printf("%s_S", r->name);
add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32, ARM_CP_SECSTATE_S,
- cp, crm, opc1, opc2, name);
+ cp, crm, opc1, opc2, name, key);
g_free(name);
+
+ key |= CP_REG_AA32_NS_MASK;
add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32, ARM_CP_SECSTATE_NS,
- cp, crm, opc1, opc2, r->name);
+ cp, crm, opc1, opc2, r->name, key);
break;
default:
g_assert_not_reached();
@@ -7573,6 +7566,8 @@ static void add_cpreg_to_hashtable_aa32(ARMCPU *cpu, const ARMCPRegInfo *r,
static void add_cpreg_to_hashtable_aa64(ARMCPU *cpu, const ARMCPRegInfo *r,
int crm, int opc1, int opc2)
{
+ uint32_t key = ENCODE_AA64_CP_REG(r->opc0, opc1, r->crn, crm, opc2);
+
if ((r->type & ARM_CP_ADD_TLBI_NXS) &&
cpu_isar_feature(aa64_xs, cpu)) {
/*
@@ -7587,18 +7582,22 @@ static void add_cpreg_to_hashtable_aa64(ARMCPU *cpu, const ARMCPRegInfo *r,
*/
ARMCPRegInfo nxs_ri = *r;
g_autofree char *name = g_strdup_printf("%sNXS", r->name);
+ uint32_t nxs_key;
assert(nxs_ri.crn < 0xf);
nxs_ri.crn++;
+ nxs_key = key + (1 << CP_REG_ARM64_SYSREG_CRN_SHIFT);
if (nxs_ri.fgt) {
nxs_ri.fgt |= R_FGT_NXS_MASK;
}
+
add_cpreg_to_hashtable(cpu, &nxs_ri, ARM_CP_STATE_AA64,
- ARM_CP_SECSTATE_NS, 0, crm, opc1, opc2, name);
+ ARM_CP_SECSTATE_NS, 0, crm, opc1, opc2,
+ name, nxs_key);
}
add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA64, ARM_CP_SECSTATE_NS,
- 0, crm, opc1, opc2, r->name);
+ 0, crm, opc1, opc2, r->name, key);
}
void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 24/36] target/arm: Add key parameter to add_cpreg_to_hashtable
2025-09-16 14:22 ` [PATCH v2 24/36] target/arm: Add key parameter to add_cpreg_to_hashtable Richard Henderson
@ 2025-09-25 11:07 ` Philippe Mathieu-Daudé
2025-09-25 14:51 ` Peter Maydell
0 siblings, 1 reply; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 11:07 UTC (permalink / raw)
To: Richard Henderson, qemu-devel; +Cc: qemu-arm, peter.maydell
On 16/9/25 16:22, Richard Henderson wrote:
> Hoist the computation of key into the caller, where
> state is a known constant.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/helper.c | 39 +++++++++++++++++++--------------------
> 1 file changed, 19 insertions(+), 20 deletions(-)
>
> diff --git a/target/arm/helper.c b/target/arm/helper.c
> index 4a109a113d..a5195e296d 100644
> --- a/target/arm/helper.c
> +++ b/target/arm/helper.c
> @@ -7424,26 +7424,13 @@ void register_cp_regs_for_features(ARMCPU *cpu)
> static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
> CPState state, CPSecureState secstate,
> int cp, int crm, int opc1, int opc2,
> - const char *name)
> + const char *name, uint32_t key)
> {
> CPUARMState *env = &cpu->env;
> - uint32_t key;
> ARMCPRegInfo *r2;
> - bool is64 = r->type & ARM_CP_64BIT;
> bool ns = secstate & ARM_CP_SECSTATE_NS;
> size_t name_len;
>
> - switch (state) {
> - case ARM_CP_STATE_AA32:
> - key = ENCODE_CP_REG(cp, is64, ns, r->crn, crm, opc1, opc2);
> - break;
> - case ARM_CP_STATE_AA64:
> - key = ENCODE_AA64_CP_REG(r->opc0, opc1, r->crn, crm, opc2);
> - break;
> - default:
> - g_assert_not_reached();
> - }
> -
> /* Overriding of an existing definition must be explicitly requested. */
> if (!(r->type & ARM_CP_OVERRIDE)) {
> const ARMCPRegInfo *oldreg = get_arm_cp_reginfo(cpu->cp_regs, key);
> @@ -7548,22 +7535,28 @@ static void add_cpreg_to_hashtable_aa32(ARMCPU *cpu, const ARMCPRegInfo *r,
> * (same for secure and non-secure world) or banked.
> */
> char *name;
> + bool is64 = r->type & ARM_CP_64BIT;
> + uint32_t key = ENCODE_CP_REG(cp, is64, 0, r->crn, crm, opc1, opc2);
>
> assert(!(r->type & ARM_CP_ADD_TLBI_NXS)); /* aa64 only */
>
> switch (r->secure) {
> - case ARM_CP_SECSTATE_S:
> case ARM_CP_SECSTATE_NS:
> + key |= CP_REG_AA32_NS_MASK;
> + /* fall through */
> + case ARM_CP_SECSTATE_S:
> add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32, r->secure,
> - cp, crm, opc1, opc2, r->name);
> + cp, crm, opc1, opc2, r->name, key);
> break;
> case ARM_CP_SECSTATE_BOTH:
> name = g_strdup_printf("%s_S", r->name);
> add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32, ARM_CP_SECSTATE_S,
> - cp, crm, opc1, opc2, name);
> + cp, crm, opc1, opc2, name, key);
> g_free(name);
> +
> + key |= CP_REG_AA32_NS_MASK;
> add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32, ARM_CP_SECSTATE_NS,
> - cp, crm, opc1, opc2, r->name);
> + cp, crm, opc1, opc2, r->name, key);
> break;
> default:
> g_assert_not_reached();
> @@ -7573,6 +7566,8 @@ static void add_cpreg_to_hashtable_aa32(ARMCPU *cpu, const ARMCPRegInfo *r,
> static void add_cpreg_to_hashtable_aa64(ARMCPU *cpu, const ARMCPRegInfo *r,
> int crm, int opc1, int opc2)
> {
> + uint32_t key = ENCODE_AA64_CP_REG(r->opc0, opc1, r->crn, crm, opc2);
> +
> if ((r->type & ARM_CP_ADD_TLBI_NXS) &&
> cpu_isar_feature(aa64_xs, cpu)) {
> /*
> @@ -7587,18 +7582,22 @@ static void add_cpreg_to_hashtable_aa64(ARMCPU *cpu, const ARMCPRegInfo *r,
> */
> ARMCPRegInfo nxs_ri = *r;
> g_autofree char *name = g_strdup_printf("%sNXS", r->name);
> + uint32_t nxs_key;
>
> assert(nxs_ri.crn < 0xf);
> nxs_ri.crn++;
> + nxs_key = key + (1 << CP_REG_ARM64_SYSREG_CRN_SHIFT);
This is new but not mentioned. While the CRN bit is know to be 0,
we usually use '|' to set a bit, not '+'. Preferably using '|':
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> if (nxs_ri.fgt) {
> nxs_ri.fgt |= R_FGT_NXS_MASK;
> }
> +
> add_cpreg_to_hashtable(cpu, &nxs_ri, ARM_CP_STATE_AA64,
> - ARM_CP_SECSTATE_NS, 0, crm, opc1, opc2, name);
> + ARM_CP_SECSTATE_NS, 0, crm, opc1, opc2,
> + name, nxs_key);
> }
>
> add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA64, ARM_CP_SECSTATE_NS,
> - 0, crm, opc1, opc2, r->name);
> + 0, crm, opc1, opc2, r->name, key);
> }
>
> void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
^ permalink raw reply [flat|nested] 87+ messages in thread* Re: [PATCH v2 24/36] target/arm: Add key parameter to add_cpreg_to_hashtable
2025-09-25 11:07 ` Philippe Mathieu-Daudé
@ 2025-09-25 14:51 ` Peter Maydell
2025-09-25 15:54 ` Philippe Mathieu-Daudé
0 siblings, 1 reply; 87+ messages in thread
From: Peter Maydell @ 2025-09-25 14:51 UTC (permalink / raw)
To: Philippe Mathieu-Daudé; +Cc: Richard Henderson, qemu-devel, qemu-arm
On Thu, 25 Sept 2025 at 12:07, Philippe Mathieu-Daudé <philmd@linaro.org> wrote:
>
> On 16/9/25 16:22, Richard Henderson wrote:
> > Hoist the computation of key into the caller, where
> > state is a known constant.
> > @@ -7587,18 +7582,22 @@ static void add_cpreg_to_hashtable_aa64(ARMCPU *cpu, const ARMCPRegInfo *r,
> > */
> > ARMCPRegInfo nxs_ri = *r;
> > g_autofree char *name = g_strdup_printf("%sNXS", r->name);
> > + uint32_t nxs_key;
> >
> > assert(nxs_ri.crn < 0xf);
> > nxs_ri.crn++;
> > + nxs_key = key + (1 << CP_REG_ARM64_SYSREG_CRN_SHIFT);
>
> This is new but not mentioned. While the CRN bit is know to be 0,
> we usually use '|' to set a bit, not '+'. Preferably using '|':
I thought so too at first glance -- but what we're doing here
is adding one to crn (there's a comment in this function that's
just outside the context of the diff that explains this).
Since crn is both in the reginfo field and also encoded into
the key, we need to increment both the crn and the bitfield
inside the key. As it happens, at the moment all the regdefs
with ARM_CP_ADD_TLBI_NXS have crn == 8 and so whether we add
or OR makes no difference, but conceptually the addition is
correct.
I have added a comment
/* Also increment the CRN field inside the key value */
to hopefully make it a bit clearer that we're doing an
increment operation here.
thanks
-- PMM
^ permalink raw reply [flat|nested] 87+ messages in thread* Re: [PATCH v2 24/36] target/arm: Add key parameter to add_cpreg_to_hashtable
2025-09-25 14:51 ` Peter Maydell
@ 2025-09-25 15:54 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 15:54 UTC (permalink / raw)
To: Peter Maydell; +Cc: Richard Henderson, qemu-devel, qemu-arm
On 25/9/25 16:51, Peter Maydell wrote:
> On Thu, 25 Sept 2025 at 12:07, Philippe Mathieu-Daudé <philmd@linaro.org> wrote:
>>
>> On 16/9/25 16:22, Richard Henderson wrote:
>>> Hoist the computation of key into the caller, where
>>> state is a known constant.
>
>>> @@ -7587,18 +7582,22 @@ static void add_cpreg_to_hashtable_aa64(ARMCPU *cpu, const ARMCPRegInfo *r,
>>> */
>>> ARMCPRegInfo nxs_ri = *r;
>>> g_autofree char *name = g_strdup_printf("%sNXS", r->name);
>>> + uint32_t nxs_key;
>>>
>>> assert(nxs_ri.crn < 0xf);
>>> nxs_ri.crn++;
>>> + nxs_key = key + (1 << CP_REG_ARM64_SYSREG_CRN_SHIFT);
>>
>> This is new but not mentioned. While the CRN bit is know to be 0,
>> we usually use '|' to set a bit, not '+'. Preferably using '|':
>
> I thought so too at first glance -- but what we're doing here
> is adding one to crn (there's a comment in this function that's
> just outside the context of the diff that explains this).
> Since crn is both in the reginfo field and also encoded into
> the key, we need to increment both the crn and the bitfield
> inside the key. As it happens, at the moment all the regdefs
> with ARM_CP_ADD_TLBI_NXS have crn == 8 and so whether we add
> or OR makes no difference, but conceptually the addition is
> correct.
>
> I have added a comment
> /* Also increment the CRN field inside the key value */
> to hopefully make it a bit clearer that we're doing an
> increment operation here.
Thanks!
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 25/36] target/arm: Split out alloc_cpreg
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (23 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 24/36] target/arm: Add key parameter to add_cpreg_to_hashtable Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 11:09 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 26/36] target/arm: Hoist the allocation of ARMCPRegInfo Richard Henderson
` (11 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell
Include provision for a name suffix.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/helper.c | 29 +++++++++++++++++++++++------
1 file changed, 23 insertions(+), 6 deletions(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index a5195e296d..7f55ea726d 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -7417,6 +7417,28 @@ void register_cp_regs_for_features(ARMCPU *cpu)
#endif
}
+/*
+ * Copy a ARMCPRegInfo structure, allocating it along with the name
+ * and an optional suffix to the name.
+ */
+static ARMCPRegInfo *alloc_cpreg(const ARMCPRegInfo *in,
+ const char *name, const char *suffix)
+{
+ size_t name_len = strlen(name);
+ size_t suff_len = suffix ? strlen(suffix) : 0;
+ ARMCPRegInfo *out = g_malloc(sizeof(*in) + name_len + suff_len + 1);
+ char *p = (char *)(out + 1);
+
+ *out = *in;
+ out->name = p;
+
+ memcpy(p, name, name_len + 1);
+ if (suffix) {
+ memcpy(p + name_len, suffix, suff_len + 1);
+ }
+ return out;
+}
+
/*
* Private utility function for define_one_arm_cp_reg():
* add a single reginfo struct to the hash table.
@@ -7429,7 +7451,6 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
CPUARMState *env = &cpu->env;
ARMCPRegInfo *r2;
bool ns = secstate & ARM_CP_SECSTATE_NS;
- size_t name_len;
/* Overriding of an existing definition must be explicitly requested. */
if (!(r->type & ARM_CP_OVERRIDE)) {
@@ -7439,11 +7460,7 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
}
}
- /* Combine cpreg and name into one allocation. */
- name_len = strlen(name) + 1;
- r2 = g_malloc(sizeof(*r2) + name_len);
- *r2 = *r;
- r2->name = memcpy(r2 + 1, name, name_len);
+ r2 = alloc_cpreg(r, name, NULL);
/*
* Update fields to match the instantiation, overwiting wildcards
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* [PATCH v2 26/36] target/arm: Hoist the allocation of ARMCPRegInfo
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (24 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 25/36] target/arm: Split out alloc_cpreg Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 11:13 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 27/36] target/arm: Remove name argument to alloc_cpreg Richard Henderson
` (10 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell
Pass in a newly allocated structure, rather than having to
dance around allocation of the name and the structure.
Since we no longer have two copies of the structure handy
within add_cpreg_to_hashtable, delay the writeback of concrete
values over wildcards until we're done querying the wildcards.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/helper.c | 97 ++++++++++++++++++++++-----------------------
1 file changed, 48 insertions(+), 49 deletions(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 7f55ea726d..71dd094fac 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -7443,13 +7443,12 @@ static ARMCPRegInfo *alloc_cpreg(const ARMCPRegInfo *in,
* Private utility function for define_one_arm_cp_reg():
* add a single reginfo struct to the hash table.
*/
-static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
+static void add_cpreg_to_hashtable(ARMCPU *cpu, ARMCPRegInfo *r,
CPState state, CPSecureState secstate,
int cp, int crm, int opc1, int opc2,
- const char *name, uint32_t key)
+ uint32_t key)
{
CPUARMState *env = &cpu->env;
- ARMCPRegInfo *r2;
bool ns = secstate & ARM_CP_SECSTATE_NS;
/* Overriding of an existing definition must be explicitly requested. */
@@ -7460,19 +7459,6 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
}
}
- r2 = alloc_cpreg(r, name, NULL);
-
- /*
- * Update fields to match the instantiation, overwiting wildcards
- * such as CP_ANY, ARM_CP_STATE_BOTH, or ARM_CP_SECSTATE_BOTH.
- */
- r2->cp = cp;
- r2->crm = crm;
- r2->opc1 = opc1;
- r2->opc2 = opc2;
- r2->state = state;
- r2->secure = secstate;
-
{
bool isbanked = r->bank_fieldoffsets[0] && r->bank_fieldoffsets[1];
@@ -7482,7 +7468,7 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
* Overwriting fieldoffset as the array is only used to define
* banked registers but later only fieldoffset is used.
*/
- r2->fieldoffset = r->bank_fieldoffsets[ns];
+ r->fieldoffset = r->bank_fieldoffsets[ns];
}
if (state == ARM_CP_STATE_AA32) {
if (isbanked) {
@@ -7499,19 +7485,19 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
*/
if ((r->state == ARM_CP_STATE_BOTH && ns) ||
(arm_feature(env, ARM_FEATURE_V8) && !ns)) {
- r2->type |= ARM_CP_ALIAS;
+ r->type |= ARM_CP_ALIAS;
}
} else if ((secstate != r->secure) && !ns) {
/*
* The register is not banked so we only want to allow
* migration of the non-secure instance.
*/
- r2->type |= ARM_CP_ALIAS;
+ r->type |= ARM_CP_ALIAS;
}
if (HOST_BIG_ENDIAN &&
- r->state == ARM_CP_STATE_BOTH && r2->fieldoffset) {
- r2->fieldoffset += sizeof(uint32_t);
+ r->state == ARM_CP_STATE_BOTH && r->fieldoffset) {
+ r->fieldoffset += sizeof(uint32_t);
}
}
}
@@ -7523,35 +7509,46 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
* multiple times. Special registers (ie NOP/WFI) are
* never migratable and not even raw-accessible.
*/
- if (r2->type & ARM_CP_SPECIAL_MASK) {
- r2->type |= ARM_CP_NO_RAW;
+ if (r->type & ARM_CP_SPECIAL_MASK) {
+ r->type |= ARM_CP_NO_RAW;
}
if (((r->crm == CP_ANY) && crm != 0) ||
((r->opc1 == CP_ANY) && opc1 != 0) ||
((r->opc2 == CP_ANY) && opc2 != 0)) {
- r2->type |= ARM_CP_ALIAS | ARM_CP_NO_GDB;
+ r->type |= ARM_CP_ALIAS | ARM_CP_NO_GDB;
}
+ /*
+ * Update fields to match the instantiation, overwiting wildcards
+ * such as CP_ANY, ARM_CP_STATE_BOTH, or ARM_CP_SECSTATE_BOTH.
+ */
+ r->cp = cp;
+ r->crm = crm;
+ r->opc1 = opc1;
+ r->opc2 = opc2;
+ r->state = state;
+ r->secure = secstate;
+
/*
* Check that raw accesses are either forbidden or handled. Note that
* we can't assert this earlier because the setup of fieldoffset for
* banked registers has to be done first.
*/
- if (!(r2->type & ARM_CP_NO_RAW)) {
- assert(!raw_accessors_invalid(r2));
+ if (!(r->type & ARM_CP_NO_RAW)) {
+ assert(!raw_accessors_invalid(r));
}
- g_hash_table_insert(cpu->cp_regs, (gpointer)(uintptr_t)key, r2);
+ g_hash_table_insert(cpu->cp_regs, (gpointer)(uintptr_t)key, r);
}
-static void add_cpreg_to_hashtable_aa32(ARMCPU *cpu, const ARMCPRegInfo *r,
+static void add_cpreg_to_hashtable_aa32(ARMCPU *cpu, ARMCPRegInfo *r,
int cp, int crm, int opc1, int opc2)
{
/*
* Under AArch32 CP registers can be common
* (same for secure and non-secure world) or banked.
*/
- char *name;
+ ARMCPRegInfo *r_s;
bool is64 = r->type & ARM_CP_64BIT;
uint32_t key = ENCODE_CP_REG(cp, is64, 0, r->crn, crm, opc1, opc2);
@@ -7563,24 +7560,23 @@ static void add_cpreg_to_hashtable_aa32(ARMCPU *cpu, const ARMCPRegInfo *r,
/* fall through */
case ARM_CP_SECSTATE_S:
add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32, r->secure,
- cp, crm, opc1, opc2, r->name, key);
+ cp, crm, opc1, opc2, key);
break;
case ARM_CP_SECSTATE_BOTH:
- name = g_strdup_printf("%s_S", r->name);
- add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32, ARM_CP_SECSTATE_S,
- cp, crm, opc1, opc2, name, key);
- g_free(name);
+ r_s = alloc_cpreg(r, r->name, "_S");
+ add_cpreg_to_hashtable(cpu, r_s, ARM_CP_STATE_AA32, ARM_CP_SECSTATE_S,
+ cp, crm, opc1, opc2, key);
key |= CP_REG_AA32_NS_MASK;
add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32, ARM_CP_SECSTATE_NS,
- cp, crm, opc1, opc2, r->name, key);
+ cp, crm, opc1, opc2, key);
break;
default:
g_assert_not_reached();
}
}
-static void add_cpreg_to_hashtable_aa64(ARMCPU *cpu, const ARMCPRegInfo *r,
+static void add_cpreg_to_hashtable_aa64(ARMCPU *cpu, ARMCPRegInfo *r,
int crm, int opc1, int opc2)
{
uint32_t key = ENCODE_AA64_CP_REG(r->opc0, opc1, r->crn, crm, opc2);
@@ -7597,24 +7593,23 @@ static void add_cpreg_to_hashtable_aa64(ARMCPU *cpu, const ARMCPRegInfo *r,
* and name that it is passed, so it's OK to use
* a local struct here.
*/
- ARMCPRegInfo nxs_ri = *r;
- g_autofree char *name = g_strdup_printf("%sNXS", r->name);
+ ARMCPRegInfo *nxs_ri = alloc_cpreg(r, r->name, "NXS");
uint32_t nxs_key;
- assert(nxs_ri.crn < 0xf);
- nxs_ri.crn++;
+ assert(nxs_ri->crn < 0xf);
+ nxs_ri->crn++;
nxs_key = key + (1 << CP_REG_ARM64_SYSREG_CRN_SHIFT);
- if (nxs_ri.fgt) {
- nxs_ri.fgt |= R_FGT_NXS_MASK;
+ if (nxs_ri->fgt) {
+ nxs_ri->fgt |= R_FGT_NXS_MASK;
}
- add_cpreg_to_hashtable(cpu, &nxs_ri, ARM_CP_STATE_AA64,
+ add_cpreg_to_hashtable(cpu, nxs_ri, ARM_CP_STATE_AA64,
ARM_CP_SECSTATE_NS, 0, crm, opc1, opc2,
- name, nxs_key);
+ nxs_key);
}
add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA64, ARM_CP_SECSTATE_NS,
- 0, crm, opc1, opc2, r->name, key);
+ 0, crm, opc1, opc2, key);
}
void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
@@ -7821,16 +7816,20 @@ void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
for (int crm = crmmin; crm <= crmmax; crm++) {
for (int opc1 = opc1min; opc1 <= opc1max; opc1++) {
for (int opc2 = opc2min; opc2 <= opc2max; opc2++) {
+ ARMCPRegInfo *r2 = alloc_cpreg(r, r->name, NULL);
+ ARMCPRegInfo *r3;
+
switch (r->state) {
case ARM_CP_STATE_AA32:
- add_cpreg_to_hashtable_aa32(cpu, r, cp, crm, opc1, opc2);
+ add_cpreg_to_hashtable_aa32(cpu, r2, cp, crm, opc1, opc2);
break;
case ARM_CP_STATE_AA64:
- add_cpreg_to_hashtable_aa64(cpu, r, crm, opc1, opc2);
+ add_cpreg_to_hashtable_aa64(cpu, r2, crm, opc1, opc2);
break;
case ARM_CP_STATE_BOTH:
- add_cpreg_to_hashtable_aa32(cpu, r, cp, crm, opc1, opc2);
- add_cpreg_to_hashtable_aa64(cpu, r, crm, opc1, opc2);
+ r3 = alloc_cpreg(r2, r2->name, NULL);
+ add_cpreg_to_hashtable_aa32(cpu, r2, cp, crm, opc1, opc2);
+ add_cpreg_to_hashtable_aa64(cpu, r3, crm, opc1, opc2);
break;
default:
g_assert_not_reached();
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 26/36] target/arm: Hoist the allocation of ARMCPRegInfo
2025-09-16 14:22 ` [PATCH v2 26/36] target/arm: Hoist the allocation of ARMCPRegInfo Richard Henderson
@ 2025-09-25 11:13 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 11:13 UTC (permalink / raw)
To: Richard Henderson, qemu-devel; +Cc: qemu-arm, peter.maydell
On 16/9/25 16:22, Richard Henderson wrote:
> Pass in a newly allocated structure, rather than having to
> dance around allocation of the name and the structure.
>
> Since we no longer have two copies of the structure handy
> within add_cpreg_to_hashtable, delay the writeback of concrete
> values over wildcards until we're done querying the wildcards.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/helper.c | 97 ++++++++++++++++++++++-----------------------
> 1 file changed, 48 insertions(+), 49 deletions(-)
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 27/36] target/arm: Remove name argument to alloc_cpreg
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (25 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 26/36] target/arm: Hoist the allocation of ARMCPRegInfo Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 11:15 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 28/36] target/arm: Move alias setting for wildcards Richard Henderson
` (9 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell
All callers now pass in->name, so take the value from there.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/helper.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 71dd094fac..da3dd073d3 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -7421,9 +7421,9 @@ void register_cp_regs_for_features(ARMCPU *cpu)
* Copy a ARMCPRegInfo structure, allocating it along with the name
* and an optional suffix to the name.
*/
-static ARMCPRegInfo *alloc_cpreg(const ARMCPRegInfo *in,
- const char *name, const char *suffix)
+static ARMCPRegInfo *alloc_cpreg(const ARMCPRegInfo *in, const char *suffix)
{
+ const char *name = in->name;
size_t name_len = strlen(name);
size_t suff_len = suffix ? strlen(suffix) : 0;
ARMCPRegInfo *out = g_malloc(sizeof(*in) + name_len + suff_len + 1);
@@ -7563,7 +7563,7 @@ static void add_cpreg_to_hashtable_aa32(ARMCPU *cpu, ARMCPRegInfo *r,
cp, crm, opc1, opc2, key);
break;
case ARM_CP_SECSTATE_BOTH:
- r_s = alloc_cpreg(r, r->name, "_S");
+ r_s = alloc_cpreg(r, "_S");
add_cpreg_to_hashtable(cpu, r_s, ARM_CP_STATE_AA32, ARM_CP_SECSTATE_S,
cp, crm, opc1, opc2, key);
@@ -7593,7 +7593,7 @@ static void add_cpreg_to_hashtable_aa64(ARMCPU *cpu, ARMCPRegInfo *r,
* and name that it is passed, so it's OK to use
* a local struct here.
*/
- ARMCPRegInfo *nxs_ri = alloc_cpreg(r, r->name, "NXS");
+ ARMCPRegInfo *nxs_ri = alloc_cpreg(r, "NXS");
uint32_t nxs_key;
assert(nxs_ri->crn < 0xf);
@@ -7816,7 +7816,7 @@ void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
for (int crm = crmmin; crm <= crmmax; crm++) {
for (int opc1 = opc1min; opc1 <= opc1max; opc1++) {
for (int opc2 = opc2min; opc2 <= opc2max; opc2++) {
- ARMCPRegInfo *r2 = alloc_cpreg(r, r->name, NULL);
+ ARMCPRegInfo *r2 = alloc_cpreg(r, NULL);
ARMCPRegInfo *r3;
switch (r->state) {
@@ -7827,7 +7827,7 @@ void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
add_cpreg_to_hashtable_aa64(cpu, r2, crm, opc1, opc2);
break;
case ARM_CP_STATE_BOTH:
- r3 = alloc_cpreg(r2, r2->name, NULL);
+ r3 = alloc_cpreg(r2, NULL);
add_cpreg_to_hashtable_aa32(cpu, r2, cp, crm, opc1, opc2);
add_cpreg_to_hashtable_aa64(cpu, r3, crm, opc1, opc2);
break;
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 27/36] target/arm: Remove name argument to alloc_cpreg
2025-09-16 14:22 ` [PATCH v2 27/36] target/arm: Remove name argument to alloc_cpreg Richard Henderson
@ 2025-09-25 11:15 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 11:15 UTC (permalink / raw)
To: Richard Henderson, qemu-devel; +Cc: qemu-arm, peter.maydell
On 16/9/25 16:22, Richard Henderson wrote:
> All callers now pass in->name, so take the value from there.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/helper.c | 12 ++++++------
> 1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/target/arm/helper.c b/target/arm/helper.c
> index 71dd094fac..da3dd073d3 100644
> --- a/target/arm/helper.c
> +++ b/target/arm/helper.c
> @@ -7421,9 +7421,9 @@ void register_cp_regs_for_features(ARMCPU *cpu)
> * Copy a ARMCPRegInfo structure, allocating it along with the name
> * and an optional suffix to the name.
> */
> -static ARMCPRegInfo *alloc_cpreg(const ARMCPRegInfo *in,
> - const char *name, const char *suffix)
> +static ARMCPRegInfo *alloc_cpreg(const ARMCPRegInfo *in, const char *suffix)
> {
> + const char *name = in->name;
This is internal API call, but still, should we assert for non-NULL?
Regardless,
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
> size_t name_len = strlen(name);
> size_t suff_len = suffix ? strlen(suffix) : 0;
> ARMCPRegInfo *out = g_malloc(sizeof(*in) + name_len + suff_len + 1);
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 28/36] target/arm: Move alias setting for wildcards
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (26 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 27/36] target/arm: Remove name argument to alloc_cpreg Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 11:40 ` Philippe Mathieu-Daudé
2025-09-25 14:55 ` Peter Maydell
2025-09-16 14:22 ` [PATCH v2 29/36] target/arm: Move writeback of CP_ANY fields Richard Henderson
` (8 subsequent siblings)
36 siblings, 2 replies; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell
Move this test from add_cpreg_to_hashtable to
define_one_arm_cp_reg_with_opaque, where we can also
simplify it based on the loop variables.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/helper.c | 22 ++++++++++++----------
1 file changed, 12 insertions(+), 10 deletions(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index da3dd073d3..9156cc72ae 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -7503,20 +7503,12 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, ARMCPRegInfo *r,
}
/*
- * By convention, for wildcarded registers only the first
- * entry is used for migration; the others are marked as
- * ALIAS so we don't try to transfer the register
- * multiple times. Special registers (ie NOP/WFI) are
- * never migratable and not even raw-accessible.
+ * Special registers (ie NOP/WFI) are never migratable and
+ * are not even raw-accessible.
*/
if (r->type & ARM_CP_SPECIAL_MASK) {
r->type |= ARM_CP_NO_RAW;
}
- if (((r->crm == CP_ANY) && crm != 0) ||
- ((r->opc1 == CP_ANY) && opc1 != 0) ||
- ((r->opc2 == CP_ANY) && opc2 != 0)) {
- r->type |= ARM_CP_ALIAS | ARM_CP_NO_GDB;
- }
/*
* Update fields to match the instantiation, overwiting wildcards
@@ -7819,6 +7811,16 @@ void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
ARMCPRegInfo *r2 = alloc_cpreg(r, NULL);
ARMCPRegInfo *r3;
+ /*
+ * By convention for wildcarded registers, only the first
+ * entry is used for migration; the others are marked as
+ * ALIAS so we don't try to transfer the register
+ * multiple times.
+ */
+ if (crm != crmmin || opc1 != opc1min || opc2 != opc2min) {
+ r2->type |= ARM_CP_ALIAS | ARM_CP_NO_GDB;
+ }
+
switch (r->state) {
case ARM_CP_STATE_AA32:
add_cpreg_to_hashtable_aa32(cpu, r2, cp, crm, opc1, opc2);
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 28/36] target/arm: Move alias setting for wildcards
2025-09-16 14:22 ` [PATCH v2 28/36] target/arm: Move alias setting for wildcards Richard Henderson
@ 2025-09-25 11:40 ` Philippe Mathieu-Daudé
2025-09-25 14:55 ` Peter Maydell
1 sibling, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 11:40 UTC (permalink / raw)
To: Richard Henderson, qemu-devel; +Cc: qemu-arm, peter.maydell
On 16/9/25 16:22, Richard Henderson wrote:
> Move this test from add_cpreg_to_hashtable to
> define_one_arm_cp_reg_with_opaque, where we can also
> simplify it based on the loop variables.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/helper.c | 22 ++++++++++++----------
> 1 file changed, 12 insertions(+), 10 deletions(-)
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* Re: [PATCH v2 28/36] target/arm: Move alias setting for wildcards
2025-09-16 14:22 ` [PATCH v2 28/36] target/arm: Move alias setting for wildcards Richard Henderson
2025-09-25 11:40 ` Philippe Mathieu-Daudé
@ 2025-09-25 14:55 ` Peter Maydell
1 sibling, 0 replies; 87+ messages in thread
From: Peter Maydell @ 2025-09-25 14:55 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-devel, qemu-arm
On Tue, 16 Sept 2025 at 15:23, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> Move this test from add_cpreg_to_hashtable to
> define_one_arm_cp_reg_with_opaque, where we can also
> simplify it based on the loop variables.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> /*
> - * By convention, for wildcarded registers only the first
> - * entry is used for migration; the others are marked as
> + /*
> + * By convention for wildcarded registers, only the first
> + * entry is used for migration; the others are marked as
You moved the comma in this sentence; I preferred it where
it was so I have moved it back :-)
-- PMM
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 29/36] target/arm: Move writeback of CP_ANY fields
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (27 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 28/36] target/arm: Move alias setting for wildcards Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 11:43 ` Philippe Mathieu-Daudé
2025-09-25 11:43 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 30/36] target/arm: Move endianness fixup for 32-bit registers Richard Henderson
` (7 subsequent siblings)
36 siblings, 2 replies; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell
Move the writeback of cp, crm, opc1, opc2 to define_one_arm_cp_reg,
which means we don't have to pass all those parameters down
to subroutines.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/helper.c | 52 ++++++++++++++++++++++-----------------------
1 file changed, 26 insertions(+), 26 deletions(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 9156cc72ae..7828268c7f 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -7445,7 +7445,6 @@ static ARMCPRegInfo *alloc_cpreg(const ARMCPRegInfo *in, const char *suffix)
*/
static void add_cpreg_to_hashtable(ARMCPU *cpu, ARMCPRegInfo *r,
CPState state, CPSecureState secstate,
- int cp, int crm, int opc1, int opc2,
uint32_t key)
{
CPUARMState *env = &cpu->env;
@@ -7512,12 +7511,8 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, ARMCPRegInfo *r,
/*
* Update fields to match the instantiation, overwiting wildcards
- * such as CP_ANY, ARM_CP_STATE_BOTH, or ARM_CP_SECSTATE_BOTH.
+ * such as ARM_CP_STATE_BOTH or ARM_CP_SECSTATE_BOTH.
*/
- r->cp = cp;
- r->crm = crm;
- r->opc1 = opc1;
- r->opc2 = opc2;
r->state = state;
r->secure = secstate;
@@ -7533,8 +7528,7 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, ARMCPRegInfo *r,
g_hash_table_insert(cpu->cp_regs, (gpointer)(uintptr_t)key, r);
}
-static void add_cpreg_to_hashtable_aa32(ARMCPU *cpu, ARMCPRegInfo *r,
- int cp, int crm, int opc1, int opc2)
+static void add_cpreg_to_hashtable_aa32(ARMCPU *cpu, ARMCPRegInfo *r)
{
/*
* Under AArch32 CP registers can be common
@@ -7542,7 +7536,8 @@ static void add_cpreg_to_hashtable_aa32(ARMCPU *cpu, ARMCPRegInfo *r,
*/
ARMCPRegInfo *r_s;
bool is64 = r->type & ARM_CP_64BIT;
- uint32_t key = ENCODE_CP_REG(cp, is64, 0, r->crn, crm, opc1, opc2);
+ uint32_t key = ENCODE_CP_REG(r->cp, is64, 0, r->crn,
+ r->crm, r->opc1, r->opc2);
assert(!(r->type & ARM_CP_ADD_TLBI_NXS)); /* aa64 only */
@@ -7551,27 +7546,26 @@ static void add_cpreg_to_hashtable_aa32(ARMCPU *cpu, ARMCPRegInfo *r,
key |= CP_REG_AA32_NS_MASK;
/* fall through */
case ARM_CP_SECSTATE_S:
- add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32, r->secure,
- cp, crm, opc1, opc2, key);
+ add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32, r->secure, key);
break;
case ARM_CP_SECSTATE_BOTH:
r_s = alloc_cpreg(r, "_S");
- add_cpreg_to_hashtable(cpu, r_s, ARM_CP_STATE_AA32, ARM_CP_SECSTATE_S,
- cp, crm, opc1, opc2, key);
+ add_cpreg_to_hashtable(cpu, r_s, ARM_CP_STATE_AA32,
+ ARM_CP_SECSTATE_S, key);
key |= CP_REG_AA32_NS_MASK;
- add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32, ARM_CP_SECSTATE_NS,
- cp, crm, opc1, opc2, key);
+ add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA32,
+ ARM_CP_SECSTATE_NS, key);
break;
default:
g_assert_not_reached();
}
}
-static void add_cpreg_to_hashtable_aa64(ARMCPU *cpu, ARMCPRegInfo *r,
- int crm, int opc1, int opc2)
+static void add_cpreg_to_hashtable_aa64(ARMCPU *cpu, ARMCPRegInfo *r)
{
- uint32_t key = ENCODE_AA64_CP_REG(r->opc0, opc1, r->crn, crm, opc2);
+ uint32_t key = ENCODE_AA64_CP_REG(r->opc0, r->opc1,
+ r->crn, r->crm, r->opc2);
if ((r->type & ARM_CP_ADD_TLBI_NXS) &&
cpu_isar_feature(aa64_xs, cpu)) {
@@ -7596,12 +7590,11 @@ static void add_cpreg_to_hashtable_aa64(ARMCPU *cpu, ARMCPRegInfo *r,
}
add_cpreg_to_hashtable(cpu, nxs_ri, ARM_CP_STATE_AA64,
- ARM_CP_SECSTATE_NS, 0, crm, opc1, opc2,
- nxs_key);
+ ARM_CP_SECSTATE_NS, nxs_key);
}
- add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA64, ARM_CP_SECSTATE_NS,
- 0, crm, opc1, opc2, key);
+ add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA64,
+ ARM_CP_SECSTATE_NS, key);
}
void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
@@ -7821,17 +7814,24 @@ void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *r)
r2->type |= ARM_CP_ALIAS | ARM_CP_NO_GDB;
}
+ /* Overwrite CP_ANY with the instantiation. */
+ r2->crm = crm;
+ r2->opc1 = opc1;
+ r2->opc2 = opc2;
+
switch (r->state) {
case ARM_CP_STATE_AA32:
- add_cpreg_to_hashtable_aa32(cpu, r2, cp, crm, opc1, opc2);
+ add_cpreg_to_hashtable_aa32(cpu, r2);
break;
case ARM_CP_STATE_AA64:
- add_cpreg_to_hashtable_aa64(cpu, r2, crm, opc1, opc2);
+ add_cpreg_to_hashtable_aa64(cpu, r2);
break;
case ARM_CP_STATE_BOTH:
r3 = alloc_cpreg(r2, NULL);
- add_cpreg_to_hashtable_aa32(cpu, r2, cp, crm, opc1, opc2);
- add_cpreg_to_hashtable_aa64(cpu, r3, crm, opc1, opc2);
+ r2->cp = cp;
+ add_cpreg_to_hashtable_aa32(cpu, r2);
+ r3->cp = 0;
+ add_cpreg_to_hashtable_aa64(cpu, r3);
break;
default:
g_assert_not_reached();
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 29/36] target/arm: Move writeback of CP_ANY fields
2025-09-16 14:22 ` [PATCH v2 29/36] target/arm: Move writeback of CP_ANY fields Richard Henderson
@ 2025-09-25 11:43 ` Philippe Mathieu-Daudé
2025-09-25 11:43 ` Philippe Mathieu-Daudé
1 sibling, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 11:43 UTC (permalink / raw)
To: Richard Henderson, qemu-devel; +Cc: qemu-arm, peter.maydell
On 16/9/25 16:22, Richard Henderson wrote:
> Move the writeback of cp, crm, opc1, opc2 to define_one_arm_cp_reg,
> which means we don't have to pass all those parameters down
> to subroutines.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/helper.c | 52 ++++++++++++++++++++++-----------------------
> 1 file changed, 26 insertions(+), 26 deletions(-)
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* Re: [PATCH v2 29/36] target/arm: Move writeback of CP_ANY fields
2025-09-16 14:22 ` [PATCH v2 29/36] target/arm: Move writeback of CP_ANY fields Richard Henderson
2025-09-25 11:43 ` Philippe Mathieu-Daudé
@ 2025-09-25 11:43 ` Philippe Mathieu-Daudé
1 sibling, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 11:43 UTC (permalink / raw)
To: Richard Henderson, qemu-devel; +Cc: qemu-arm, peter.maydell
On 16/9/25 16:22, Richard Henderson wrote:
> Move the writeback of cp, crm, opc1, opc2 to define_one_arm_cp_reg,
> which means we don't have to pass all those parameters down
> to subroutines.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/helper.c | 52 ++++++++++++++++++++++-----------------------
> 1 file changed, 26 insertions(+), 26 deletions(-)
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 30/36] target/arm: Move endianness fixup for 32-bit registers
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (28 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 29/36] target/arm: Move writeback of CP_ANY fields Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 11:49 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 31/36] target/arm: Rename TBFLAG_A64_NV2_MEM_E20 with *_E2H Richard Henderson
` (6 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell
Move the test outside of the banked register block,
and repeat the AA32 test.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/helper.c | 17 ++++++++++++-----
1 file changed, 12 insertions(+), 5 deletions(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 7828268c7f..0f681c15e0 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -7493,14 +7493,21 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, ARMCPRegInfo *r,
*/
r->type |= ARM_CP_ALIAS;
}
-
- if (HOST_BIG_ENDIAN &&
- r->state == ARM_CP_STATE_BOTH && r->fieldoffset) {
- r->fieldoffset += sizeof(uint32_t);
- }
}
}
+ /*
+ * For 32-bit AArch32 regs shared with 64-bit AArch64 regs,
+ * adjust the field offset for endianness. This had to be
+ * delayed until banked registers were resolved.
+ */
+ if (HOST_BIG_ENDIAN &&
+ state == ARM_CP_STATE_AA32 &&
+ r->state == ARM_CP_STATE_BOTH &&
+ r->fieldoffset) {
+ r->fieldoffset += sizeof(uint32_t);
+ }
+
/*
* Special registers (ie NOP/WFI) are never migratable and
* are not even raw-accessible.
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* [PATCH v2 31/36] target/arm: Rename TBFLAG_A64_NV2_MEM_E20 with *_E2H
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (29 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 30/36] target/arm: Move endianness fixup for 32-bit registers Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 11:29 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 32/36] target/arm: Split out redirect_cpreg Richard Henderson
` (5 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell
Install e2h in tbflags and compute nv2_mem_e20 from
that in aarch64_tr_init_disas_context.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpu.h | 3 +--
target/arm/tcg/translate.h | 2 ++
target/arm/tcg/hflags.c | 8 +++++---
target/arm/tcg/translate-a64.c | 3 ++-
4 files changed, 10 insertions(+), 6 deletions(-)
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index c15d79a106..4a22b216b3 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -3093,8 +3093,7 @@ FIELD(TBFLAG_A64, ATA0, 31, 1)
FIELD(TBFLAG_A64, NV, 32, 1)
FIELD(TBFLAG_A64, NV1, 33, 1)
FIELD(TBFLAG_A64, NV2, 34, 1)
-/* Set if FEAT_NV2 RAM accesses use the EL2&0 translation regime */
-FIELD(TBFLAG_A64, NV2_MEM_E20, 35, 1)
+FIELD(TBFLAG_A64, E2H, 35, 1)
/* Set if FEAT_NV2 RAM accesses are big-endian */
FIELD(TBFLAG_A64, NV2_MEM_BE, 36, 1)
FIELD(TBFLAG_A64, AH, 37, 1) /* FPCR.AH */
diff --git a/target/arm/tcg/translate.h b/target/arm/tcg/translate.h
index f974996f3f..cd67c0ed07 100644
--- a/target/arm/tcg/translate.h
+++ b/target/arm/tcg/translate.h
@@ -150,6 +150,8 @@ typedef struct DisasContext {
bool trap_eret;
/* True if FEAT_LSE2 SCTLR_ELx.nAA is set */
bool naa;
+ /* True if HCR_EL2.E2H is set */
+ bool e2h;
/* True if FEAT_NV HCR_EL2.NV is enabled */
bool nv;
/* True if NV enabled and HCR_EL2.NV1 is set */
diff --git a/target/arm/tcg/hflags.c b/target/arm/tcg/hflags.c
index 59ab526375..6969d41ea0 100644
--- a/target/arm/tcg/hflags.c
+++ b/target/arm/tcg/hflags.c
@@ -258,6 +258,11 @@ static CPUARMTBFlags rebuild_hflags_a64(CPUARMState *env, int el, int fp_el,
DP_TBFLAG_A64(flags, TBII, tbii);
DP_TBFLAG_A64(flags, TBID, tbid);
+ /* E2H is used by both VHE and NV2. */
+ if (hcr & HCR_E2H) {
+ DP_TBFLAG_A64(flags, E2H, 1);
+ }
+
if (cpu_isar_feature(aa64_sve, env_archcpu(env))) {
int sve_el = sve_exception_el(env, el);
@@ -390,9 +395,6 @@ static CPUARMTBFlags rebuild_hflags_a64(CPUARMState *env, int el, int fp_el,
}
if (hcr & HCR_NV2) {
DP_TBFLAG_A64(flags, NV2, 1);
- if (hcr & HCR_E2H) {
- DP_TBFLAG_A64(flags, NV2_MEM_E20, 1);
- }
if (env->cp15.sctlr_el[2] & SCTLR_EE) {
DP_TBFLAG_A64(flags, NV2_MEM_BE, 1);
}
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 0ec309f1ea..599e7a36ee 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -10304,10 +10304,11 @@ static void aarch64_tr_init_disas_context(DisasContextBase *dcbase,
dc->pstate_za = EX_TBFLAG_A64(tb_flags, PSTATE_ZA);
dc->sme_trap_nonstreaming = EX_TBFLAG_A64(tb_flags, SME_TRAP_NONSTREAMING);
dc->naa = EX_TBFLAG_A64(tb_flags, NAA);
+ dc->e2h = EX_TBFLAG_A64(tb_flags, E2H);
dc->nv = EX_TBFLAG_A64(tb_flags, NV);
dc->nv1 = EX_TBFLAG_A64(tb_flags, NV1);
dc->nv2 = EX_TBFLAG_A64(tb_flags, NV2);
- dc->nv2_mem_e20 = EX_TBFLAG_A64(tb_flags, NV2_MEM_E20);
+ dc->nv2_mem_e20 = dc->nv2 && dc->e2h;
dc->nv2_mem_be = EX_TBFLAG_A64(tb_flags, NV2_MEM_BE);
dc->fpcr_ah = EX_TBFLAG_A64(tb_flags, AH);
dc->fpcr_nep = EX_TBFLAG_A64(tb_flags, NEP);
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 31/36] target/arm: Rename TBFLAG_A64_NV2_MEM_E20 with *_E2H
2025-09-16 14:22 ` [PATCH v2 31/36] target/arm: Rename TBFLAG_A64_NV2_MEM_E20 with *_E2H Richard Henderson
@ 2025-09-25 11:29 ` Philippe Mathieu-Daudé
0 siblings, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 11:29 UTC (permalink / raw)
To: Richard Henderson, qemu-devel; +Cc: qemu-arm, peter.maydell
On 16/9/25 16:22, Richard Henderson wrote:
> Install e2h in tbflags and compute nv2_mem_e20 from
> that in aarch64_tr_init_disas_context.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/cpu.h | 3 +--
> target/arm/tcg/translate.h | 2 ++
> target/arm/tcg/hflags.c | 8 +++++---
> target/arm/tcg/translate-a64.c | 3 ++-
> 4 files changed, 10 insertions(+), 6 deletions(-)
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 32/36] target/arm: Split out redirect_cpreg
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (30 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 31/36] target/arm: Rename TBFLAG_A64_NV2_MEM_E20 with *_E2H Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 11:30 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 33/36] target/arm: Redirect VHE FOO_EL1 -> FOO_EL2 during translation Richard Henderson
` (4 subsequent siblings)
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/tcg/translate-a64.c | 17 ++++++++++++++---
1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 599e7a36ee..c0fa2137b6 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -2455,6 +2455,19 @@ static void gen_sysreg_undef(DisasContext *s, bool isread,
gen_exception_insn(s, 0, EXCP_UDEF, syndrome);
}
+/*
+ * Look up @key, returning the cpreg, which must exist.
+ * Additionally, the new cpreg must also be accessible.
+ */
+static const ARMCPRegInfo *
+redirect_cpreg(DisasContext *s, uint32_t key, bool isread)
+{
+ const ARMCPRegInfo *ri = get_arm_cp_reginfo(s->cp_regs, key);
+ assert(ri);
+ assert(cp_access_ok(s->current_el, ri, isread));
+ return ri;
+}
+
/* MRS - move from system register
* MSR (register) - move to system register
* SYS
@@ -2603,9 +2616,7 @@ static void handle_sys(DisasContext *s, bool isread,
* fine-grained-traps on EL1 also do not apply here.
*/
key = ENCODE_AA64_CP_REG(op0, 0, crn, crm, op2);
- ri = get_arm_cp_reginfo(s->cp_regs, key);
- assert(ri);
- assert(cp_access_ok(s->current_el, ri, isread));
+ ri = redirect_cpreg(s, key, isread);
/*
* We might not have done an update_pc earlier, so check we don't
* need it. We could support this in future if necessary.
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* [PATCH v2 33/36] target/arm: Redirect VHE FOO_EL1 -> FOO_EL2 during translation
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (31 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 32/36] target/arm: Split out redirect_cpreg Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 13:27 ` Philippe Mathieu-Daudé
2025-09-25 13:54 ` Peter Maydell
2025-09-16 14:22 ` [PATCH v2 34/36] target/arm: Redirect VHE FOO_EL12 to FOO_EL1 " Richard Henderson
` (3 subsequent siblings)
36 siblings, 2 replies; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpregs.h | 6 ++++
target/arm/gdbstub.c | 5 ++++
target/arm/helper.c | 53 +---------------------------------
target/arm/tcg/translate-a64.c | 9 ++++++
4 files changed, 21 insertions(+), 52 deletions(-)
diff --git a/target/arm/cpregs.h b/target/arm/cpregs.h
index 7bdf6cf847..d34ed0d40b 100644
--- a/target/arm/cpregs.h
+++ b/target/arm/cpregs.h
@@ -911,6 +911,12 @@ struct ARMCPRegInfo {
*/
uint32_t nv2_redirect_offset;
+ /*
+ * With VHE, with E2H, at EL2, access to this EL0/EL1 reg redirects
+ * to the EL2 reg with the specified key.
+ */
+ uint32_t vhe_redir_to_el2;
+
/* This is used only by VHE. */
void *opaque;
/*
diff --git a/target/arm/gdbstub.c b/target/arm/gdbstub.c
index e2fc389170..3727dc01af 100644
--- a/target/arm/gdbstub.c
+++ b/target/arm/gdbstub.c
@@ -249,6 +249,11 @@ static int arm_gdb_get_sysreg(CPUState *cs, GByteArray *buf, int reg)
if (ri) {
switch (cpreg_field_type(ri)) {
case MO_64:
+ if (ri->vhe_redir_to_el2 &&
+ (arm_hcr_el2_eff(env) & HCR_E2H) &&
+ arm_current_el(env) == 2) {
+ ri = get_arm_cp_reginfo(cpu->cp_regs, ri->vhe_redir_to_el2);
+ }
return gdb_get_reg64(buf, (uint64_t)read_raw_cp_reg(env, ri));
case MO_32:
return gdb_get_reg32(buf, (uint32_t)read_raw_cp_reg(env, ri));
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 0f681c15e0..49bb1e8365 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -4456,47 +4456,6 @@ static CPAccessResult access_el1nvvct(CPUARMState *env, const ARMCPRegInfo *ri,
return e2h_access(env, ri, isread);
}
-/* Test if system register redirection is to occur in the current state. */
-static bool redirect_for_e2h(CPUARMState *env)
-{
- return arm_current_el(env) == 2 && (arm_hcr_el2_eff(env) & HCR_E2H);
-}
-
-static uint64_t el2_e2h_read(CPUARMState *env, const ARMCPRegInfo *ri)
-{
- CPReadFn *readfn;
-
- if (redirect_for_e2h(env)) {
- /* Switch to the saved EL2 version of the register. */
- ri = ri->opaque;
- readfn = ri->readfn;
- } else {
- readfn = ri->orig_readfn;
- }
- if (readfn == NULL) {
- readfn = raw_read;
- }
- return readfn(env, ri);
-}
-
-static void el2_e2h_write(CPUARMState *env, const ARMCPRegInfo *ri,
- uint64_t value)
-{
- CPWriteFn *writefn;
-
- if (redirect_for_e2h(env)) {
- /* Switch to the saved EL2 version of the register. */
- ri = ri->opaque;
- writefn = ri->writefn;
- } else {
- writefn = ri->orig_writefn;
- }
- if (writefn == NULL) {
- writefn = raw_write;
- }
- writefn(env, ri, value);
-}
-
static uint64_t el2_e2h_e12_read(CPUARMState *env, const ARMCPRegInfo *ri)
{
/* Pass the EL1 register accessor its ri, not the EL12 alias ri */
@@ -4676,17 +4635,7 @@ static void define_arm_vh_e2h_redirects_aliases(ARMCPU *cpu)
(gpointer)(uintptr_t)a->new_key, new_reg);
g_assert(ok);
- src_reg->opaque = dst_reg;
- src_reg->orig_readfn = src_reg->readfn ?: raw_read;
- src_reg->orig_writefn = src_reg->writefn ?: raw_write;
- if (!src_reg->raw_readfn) {
- src_reg->raw_readfn = raw_read;
- }
- if (!src_reg->raw_writefn) {
- src_reg->raw_writefn = raw_write;
- }
- src_reg->readfn = el2_e2h_read;
- src_reg->writefn = el2_e2h_write;
+ src_reg->vhe_redir_to_el2 = a->dst_key;
}
}
#endif
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index c0fa2137b6..3ef24fb0c3 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -2573,6 +2573,15 @@ static void handle_sys(DisasContext *s, bool isread,
}
}
+ if (ri->vhe_redir_to_el2 && s->current_el == 2 && s->e2h) {
+ /*
+ * This one of the FOO_EL1 registers which redirect to FOO_EL2
+ * from EL2 when HCR_EL2.E2H is set.
+ */
+ key = ri->vhe_redir_to_el2;
+ ri = redirect_cpreg(s, key, isread);
+ }
+
if (ri->accessfn || (ri->fgt && s->fgt_active)) {
/* Emit code to perform further access permissions checks at
* runtime; this may result in an exception.
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 33/36] target/arm: Redirect VHE FOO_EL1 -> FOO_EL2 during translation
2025-09-16 14:22 ` [PATCH v2 33/36] target/arm: Redirect VHE FOO_EL1 -> FOO_EL2 during translation Richard Henderson
@ 2025-09-25 13:27 ` Philippe Mathieu-Daudé
2025-09-25 13:54 ` Peter Maydell
1 sibling, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 13:27 UTC (permalink / raw)
To: Richard Henderson, qemu-devel
Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
On 16/9/25 16:22, Richard Henderson wrote:
> Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/cpregs.h | 6 ++++
> target/arm/gdbstub.c | 5 ++++
> target/arm/helper.c | 53 +---------------------------------
> target/arm/tcg/translate-a64.c | 9 ++++++
> 4 files changed, 21 insertions(+), 52 deletions(-)
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* Re: [PATCH v2 33/36] target/arm: Redirect VHE FOO_EL1 -> FOO_EL2 during translation
2025-09-16 14:22 ` [PATCH v2 33/36] target/arm: Redirect VHE FOO_EL1 -> FOO_EL2 during translation Richard Henderson
2025-09-25 13:27 ` Philippe Mathieu-Daudé
@ 2025-09-25 13:54 ` Peter Maydell
2025-09-25 14:10 ` Peter Maydell
1 sibling, 1 reply; 87+ messages in thread
From: Peter Maydell @ 2025-09-25 13:54 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-devel, qemu-arm, Manos Pitsidianakis
On Tue, 16 Sept 2025 at 15:23, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/cpregs.h | 6 ++++
> target/arm/gdbstub.c | 5 ++++
> target/arm/helper.c | 53 +---------------------------------
> target/arm/tcg/translate-a64.c | 9 ++++++
> 4 files changed, 21 insertions(+), 52 deletions(-)
> -/* Test if system register redirection is to occur in the current state. */
> -static bool redirect_for_e2h(CPUARMState *env)
> -{
> - return arm_current_el(env) == 2 && (arm_hcr_el2_eff(env) & HCR_E2H);
> -}
> diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
> index c0fa2137b6..3ef24fb0c3 100644
> --- a/target/arm/tcg/translate-a64.c
> +++ b/target/arm/tcg/translate-a64.c
> @@ -2573,6 +2573,15 @@ static void handle_sys(DisasContext *s, bool isread,
> }
> }
>
> + if (ri->vhe_redir_to_el2 && s->current_el == 2 && s->e2h) {
> + /*
> + * This one of the FOO_EL1 registers which redirect to FOO_EL2
> + * from EL2 when HCR_EL2.E2H is set.
> + */
> + key = ri->vhe_redir_to_el2;
> + ri = redirect_cpreg(s, key, isread);
> + }
I was looking through the details for this one, and noticed that
R_PHHPL says the redirects from FOO_EL12 to FOO_EL1 apply
when "the PE is executing at EL2 or EL3", so I think our
check on "EL == 2" isn't actually correct. But as you can
see in the old redirect_for_e2h() code this has always been
wrong, so as this is a refactoring and shouldn't be introducing
behaviour changes:
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
thanks
-- PMM
^ permalink raw reply [flat|nested] 87+ messages in thread* Re: [PATCH v2 33/36] target/arm: Redirect VHE FOO_EL1 -> FOO_EL2 during translation
2025-09-25 13:54 ` Peter Maydell
@ 2025-09-25 14:10 ` Peter Maydell
0 siblings, 0 replies; 87+ messages in thread
From: Peter Maydell @ 2025-09-25 14:10 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-devel, qemu-arm, Manos Pitsidianakis
On Thu, 25 Sept 2025 at 14:54, Peter Maydell <peter.maydell@linaro.org> wrote:
>
> On Tue, 16 Sept 2025 at 15:23, Richard Henderson
> <richard.henderson@linaro.org> wrote:
> >
> > Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
> > Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> > ---
> > target/arm/cpregs.h | 6 ++++
> > target/arm/gdbstub.c | 5 ++++
> > target/arm/helper.c | 53 +---------------------------------
> > target/arm/tcg/translate-a64.c | 9 ++++++
> > 4 files changed, 21 insertions(+), 52 deletions(-)
>
> > -/* Test if system register redirection is to occur in the current state. */
> > -static bool redirect_for_e2h(CPUARMState *env)
> > -{
> > - return arm_current_el(env) == 2 && (arm_hcr_el2_eff(env) & HCR_E2H);
> > -}
>
> > diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
> > index c0fa2137b6..3ef24fb0c3 100644
> > --- a/target/arm/tcg/translate-a64.c
> > +++ b/target/arm/tcg/translate-a64.c
> > @@ -2573,6 +2573,15 @@ static void handle_sys(DisasContext *s, bool isread,
> > }
> > }
> >
> > + if (ri->vhe_redir_to_el2 && s->current_el == 2 && s->e2h) {
> > + /*
> > + * This one of the FOO_EL1 registers which redirect to FOO_EL2
> > + * from EL2 when HCR_EL2.E2H is set.
> > + */
> > + key = ri->vhe_redir_to_el2;
> > + ri = redirect_cpreg(s, key, isread);
> > + }
>
> I was looking through the details for this one, and noticed that
> R_PHHPL says the redirects from FOO_EL12 to FOO_EL1 apply
> when "the PE is executing at EL2 or EL3", so I think our
> check on "EL == 2" isn't actually correct.
No, I'm wrong here -- R_PHHPL is for the registers handled in
patch 34. This codepath is for E2H redirects as listed in
R_JGGMV, and those do only happen at EL2, not at EL3.
-- PMM
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 34/36] target/arm: Redirect VHE FOO_EL12 to FOO_EL1 during translation
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (32 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 33/36] target/arm: Redirect VHE FOO_EL1 -> FOO_EL2 during translation Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 13:27 ` Philippe Mathieu-Daudé
2025-09-25 14:27 ` Peter Maydell
2025-09-16 14:22 ` [PATCH v2 35/36] target/arm: Rename some cpreg to their aarch64 names Richard Henderson
` (2 subsequent siblings)
36 siblings, 2 replies; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpregs.h | 22 ++++---------
target/arm/gdbstub.c | 2 ++
target/arm/helper.c | 57 +++-------------------------------
target/arm/tcg/translate-a64.c | 12 +++++++
4 files changed, 25 insertions(+), 68 deletions(-)
diff --git a/target/arm/cpregs.h b/target/arm/cpregs.h
index d34ed0d40b..f5d6a1c386 100644
--- a/target/arm/cpregs.h
+++ b/target/arm/cpregs.h
@@ -917,8 +917,12 @@ struct ARMCPRegInfo {
*/
uint32_t vhe_redir_to_el2;
- /* This is used only by VHE. */
- void *opaque;
+ /*
+ * With VHE, with E2H, at EL2+, access to this EL02/EL12 reg
+ * redirects to the EL0/EL1 reg with the specified key.
+ */
+ uint32_t vhe_redir_to_el01;
+
/*
* Value of this register, if it is ARM_CP_CONST. Otherwise, if
* fieldoffset is non-zero, the reset value of the register.
@@ -986,20 +990,6 @@ struct ARMCPRegInfo {
* fieldoffset is 0 then no reset will be done.
*/
CPResetFn *resetfn;
-
- /*
- * "Original" readfn, writefn, accessfn.
- * For ARMv8.1-VHE register aliases, we overwrite the read/write
- * accessor functions of various EL1/EL0 to perform the runtime
- * check for which sysreg should actually be modified, and then
- * forwards the operation. Before overwriting the accessors,
- * the original function is copied here, so that accesses that
- * really do go to the EL1/EL0 version proceed normally.
- * (The corresponding EL2 register is linked via opaque.)
- */
- CPReadFn *orig_readfn;
- CPWriteFn *orig_writefn;
- CPAccessFn *orig_accessfn;
};
void define_one_arm_cp_reg(ARMCPU *cpu, const ARMCPRegInfo *regs);
diff --git a/target/arm/gdbstub.c b/target/arm/gdbstub.c
index 3727dc01af..269bc6c132 100644
--- a/target/arm/gdbstub.c
+++ b/target/arm/gdbstub.c
@@ -253,6 +253,8 @@ static int arm_gdb_get_sysreg(CPUState *cs, GByteArray *buf, int reg)
(arm_hcr_el2_eff(env) & HCR_E2H) &&
arm_current_el(env) == 2) {
ri = get_arm_cp_reginfo(cpu->cp_regs, ri->vhe_redir_to_el2);
+ } else if (ri->vhe_redir_to_el01) {
+ ri = get_arm_cp_reginfo(cpu->cp_regs, ri->vhe_redir_to_el01);
}
return gdb_get_reg64(buf, (uint64_t)read_raw_cp_reg(env, ri));
case MO_32:
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 49bb1e8365..8074c50241 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -4456,42 +4456,6 @@ static CPAccessResult access_el1nvvct(CPUARMState *env, const ARMCPRegInfo *ri,
return e2h_access(env, ri, isread);
}
-static uint64_t el2_e2h_e12_read(CPUARMState *env, const ARMCPRegInfo *ri)
-{
- /* Pass the EL1 register accessor its ri, not the EL12 alias ri */
- return ri->orig_readfn(env, ri->opaque);
-}
-
-static void el2_e2h_e12_write(CPUARMState *env, const ARMCPRegInfo *ri,
- uint64_t value)
-{
- /* Pass the EL1 register accessor its ri, not the EL12 alias ri */
- return ri->orig_writefn(env, ri->opaque, value);
-}
-
-static CPAccessResult el2_e2h_e12_access(CPUARMState *env,
- const ARMCPRegInfo *ri,
- bool isread)
-{
- if (arm_current_el(env) == 1) {
- /*
- * This must be a FEAT_NV access (will either trap or redirect
- * to memory). None of the registers with _EL12 aliases want to
- * apply their trap controls for this kind of access, so don't
- * call the orig_accessfn or do the "UNDEF when E2H is 0" check.
- */
- return CP_ACCESS_OK;
- }
- /* FOO_EL12 aliases only exist when E2H is 1; otherwise they UNDEF */
- if (!(arm_hcr_el2_eff(env) & HCR_E2H)) {
- return CP_ACCESS_UNDEFINED;
- }
- if (ri->orig_accessfn) {
- return ri->orig_accessfn(env, ri->opaque, isread);
- }
- return CP_ACCESS_OK;
-}
-
static void define_arm_vh_e2h_redirects_aliases(ARMCPU *cpu)
{
struct E2HAlias {
@@ -4585,9 +4549,6 @@ static void define_arm_vh_e2h_redirects_aliases(ARMCPU *cpu)
g_assert(strcmp(src_reg->name, a->src_name) == 0);
g_assert(strcmp(dst_reg->name, a->dst_name) == 0);
- /* None of the core system registers use opaque; we will. */
- g_assert(src_reg->opaque == NULL);
-
/* Create alias before redirection so we dup the right data. */
new_reg = g_memdup(src_reg, sizeof(ARMCPRegInfo));
@@ -4606,19 +4567,11 @@ static void define_arm_vh_e2h_redirects_aliases(ARMCPU *cpu)
>> CP_REG_ARM64_SYSREG_OP1_SHIFT;
new_reg->opc2 = (a->new_key & CP_REG_ARM64_SYSREG_OP2_MASK)
>> CP_REG_ARM64_SYSREG_OP2_SHIFT;
- new_reg->opaque = src_reg;
- new_reg->orig_readfn = src_reg->readfn ?: raw_read;
- new_reg->orig_writefn = src_reg->writefn ?: raw_write;
- new_reg->orig_accessfn = src_reg->accessfn;
- if (!new_reg->raw_readfn) {
- new_reg->raw_readfn = raw_read;
- }
- if (!new_reg->raw_writefn) {
- new_reg->raw_writefn = raw_write;
- }
- new_reg->readfn = el2_e2h_e12_read;
- new_reg->writefn = el2_e2h_e12_write;
- new_reg->accessfn = el2_e2h_e12_access;
+ new_reg->vhe_redir_to_el01 = a->src_key;
+ new_reg->readfn = NULL;
+ new_reg->writefn = NULL;
+ new_reg->accessfn = NULL;
+ new_reg->fieldoffset = 0;
/*
* If the _EL1 register is redirected to memory by FEAT_NV2,
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 3ef24fb0c3..6728e362b6 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -2580,6 +2580,18 @@ static void handle_sys(DisasContext *s, bool isread,
*/
key = ri->vhe_redir_to_el2;
ri = redirect_cpreg(s, key, isread);
+ } else if (ri->vhe_redir_to_el01 && s->current_el >= 2) {
+ /*
+ * This is one of the FOO_EL12 registers.
+ * With !E2H, they all UNDEF.
+ * With E2H, from EL2 or EL3, they redirect to FOO_EL1.
+ */
+ if (!s->e2h) {
+ gen_sysreg_undef(s, isread, op0, op1, op2, crn, crm, rt);
+ return;
+ }
+ key = ri->vhe_redir_to_el01;
+ ri = redirect_cpreg(s, key, isread);
}
if (ri->accessfn || (ri->fgt && s->fgt_active)) {
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 34/36] target/arm: Redirect VHE FOO_EL12 to FOO_EL1 during translation
2025-09-16 14:22 ` [PATCH v2 34/36] target/arm: Redirect VHE FOO_EL12 to FOO_EL1 " Richard Henderson
@ 2025-09-25 13:27 ` Philippe Mathieu-Daudé
2025-09-25 14:27 ` Peter Maydell
1 sibling, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 13:27 UTC (permalink / raw)
To: Richard Henderson, qemu-devel; +Cc: qemu-arm, peter.maydell
On 16/9/25 16:22, Richard Henderson wrote:
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/cpregs.h | 22 ++++---------
> target/arm/gdbstub.c | 2 ++
> target/arm/helper.c | 57 +++-------------------------------
> target/arm/tcg/translate-a64.c | 12 +++++++
> 4 files changed, 25 insertions(+), 68 deletions(-)
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread
* Re: [PATCH v2 34/36] target/arm: Redirect VHE FOO_EL12 to FOO_EL1 during translation
2025-09-16 14:22 ` [PATCH v2 34/36] target/arm: Redirect VHE FOO_EL12 to FOO_EL1 " Richard Henderson
2025-09-25 13:27 ` Philippe Mathieu-Daudé
@ 2025-09-25 14:27 ` Peter Maydell
1 sibling, 0 replies; 87+ messages in thread
From: Peter Maydell @ 2025-09-25 14:27 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-devel, qemu-arm
On Tue, 16 Sept 2025 at 15:23, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> + } else if (ri->vhe_redir_to_el01 && s->current_el >= 2) {
> + /*
> + * This is one of the FOO_EL12 registers.
I think we could usefully say FOO_EL12/FOO_EL02 here too.
> + * With !E2H, they all UNDEF.
> + * With E2H, from EL2 or EL3, they redirect to FOO_EL1.
> + */
> + if (!s->e2h) {
> + gen_sysreg_undef(s, isread, op0, op1, op2, crn, crm, rt);
> + return;
> + }
> + key = ri->vhe_redir_to_el01;
> + ri = redirect_cpreg(s, key, isread);
> }
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
thanks
-- PMM
^ permalink raw reply [flat|nested] 87+ messages in thread
* [PATCH v2 35/36] target/arm: Rename some cpreg to their aarch64 names
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (33 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 34/36] target/arm: Redirect VHE FOO_EL12 to FOO_EL1 " Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 11:32 ` Philippe Mathieu-Daudé
2025-09-16 14:22 ` [PATCH v2 36/36] target/arm: Remove define_arm_vh_e2h_redirects_aliases Richard Henderson
2025-09-25 15:10 ` [PATCH v2 00/36] target/arm: Reorg VHE redirection Peter Maydell
36 siblings, 1 reply; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell, Manos Pitsidianakis
Rename those registers which will have FOO_EL12 aliases.
Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/helper.c | 22 +++++++++++-----------
1 file changed, 11 insertions(+), 11 deletions(-)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 8074c50241..4172fcaa21 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -671,7 +671,7 @@ static const ARMCPRegInfo v6_cp_reginfo[] = {
*/
{ .name = "WFAR", .cp = 15, .crn = 6, .crm = 0, .opc1 = 0, .opc2 = 1,
.access = PL1_RW, .type = ARM_CP_CONST, .resetvalue = 0, },
- { .name = "CPACR", .state = ARM_CP_STATE_BOTH, .opc0 = 3,
+ { .name = "CPACR_EL1", .state = ARM_CP_STATE_BOTH, .opc0 = 3,
.crn = 1, .crm = 0, .opc1 = 0, .opc2 = 2, .accessfn = cpacr_access,
.fgt = FGT_CPACR_EL1,
.nv2_redirect_offset = 0x100 | NV2_REDIR_NV1,
@@ -2018,7 +2018,7 @@ static const ARMCPRegInfo generic_timer_cp_reginfo[] = {
.resetfn = arm_gt_cntfrq_reset,
},
/* overall control: mostly access permissions */
- { .name = "CNTKCTL", .state = ARM_CP_STATE_BOTH,
+ { .name = "CNTKCTL_EL1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 14, .crm = 1, .opc2 = 0,
.access = PL1_RW,
.fieldoffset = offsetof(CPUARMState, cp15.c14_cntkctl),
@@ -3077,8 +3077,8 @@ static uint64_t mpidr_read(CPUARMState *env, const ARMCPRegInfo *ri)
}
static const ARMCPRegInfo lpae_cp_reginfo[] = {
- /* NOP AMAIR0/1 */
- { .name = "AMAIR0", .state = ARM_CP_STATE_BOTH,
+ /* AMAIR0 is mapped to AMAIR_EL1[31:0] */
+ { .name = "AMAIR_EL1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .crn = 10, .crm = 3, .opc1 = 0, .opc2 = 0,
.access = PL1_RW, .accessfn = access_tvm_trvm,
.fgt = FGT_AMAIR_EL1,
@@ -4469,11 +4469,11 @@ static void define_arm_vh_e2h_redirects_aliases(ARMCPU *cpu)
static const struct E2HAlias aliases[] = {
{ K(3, 0, 1, 0, 0), K(3, 4, 1, 0, 0), K(3, 5, 1, 0, 0),
- "SCTLR", "SCTLR_EL2", "SCTLR_EL12" },
+ "SCTLR_EL1", "SCTLR_EL2", "SCTLR_EL12" },
{ K(3, 0, 1, 0, 3), K(3, 4, 1, 0, 3), K(3, 5, 1, 0, 3),
"SCTLR2_EL1", "SCTLR2_EL2", "SCTLR2_EL12", isar_feature_aa64_sctlr2 },
{ K(3, 0, 1, 0, 2), K(3, 4, 1, 1, 2), K(3, 5, 1, 0, 2),
- "CPACR", "CPTR_EL2", "CPACR_EL12" },
+ "CPACR_EL1", "CPTR_EL2", "CPACR_EL12" },
{ K(3, 0, 2, 0, 0), K(3, 4, 2, 0, 0), K(3, 5, 2, 0, 0),
"TTBR0_EL1", "TTBR0_EL2", "TTBR0_EL12" },
{ K(3, 0, 2, 0, 1), K(3, 4, 2, 0, 1), K(3, 5, 2, 0, 1),
@@ -4497,13 +4497,13 @@ static void define_arm_vh_e2h_redirects_aliases(ARMCPU *cpu)
{ K(3, 0, 10, 2, 0), K(3, 4, 10, 2, 0), K(3, 5, 10, 2, 0),
"MAIR_EL1", "MAIR_EL2", "MAIR_EL12" },
{ K(3, 0, 10, 3, 0), K(3, 4, 10, 3, 0), K(3, 5, 10, 3, 0),
- "AMAIR0", "AMAIR_EL2", "AMAIR_EL12" },
+ "AMAIR_EL1", "AMAIR_EL2", "AMAIR_EL12" },
{ K(3, 0, 12, 0, 0), K(3, 4, 12, 0, 0), K(3, 5, 12, 0, 0),
- "VBAR", "VBAR_EL2", "VBAR_EL12" },
+ "VBAR_EL1", "VBAR_EL2", "VBAR_EL12" },
{ K(3, 0, 13, 0, 1), K(3, 4, 13, 0, 1), K(3, 5, 13, 0, 1),
"CONTEXTIDR_EL1", "CONTEXTIDR_EL2", "CONTEXTIDR_EL12" },
{ K(3, 0, 14, 1, 0), K(3, 4, 14, 1, 0), K(3, 5, 14, 1, 0),
- "CNTKCTL", "CNTHCTL_EL2", "CNTKCTL_EL12" },
+ "CNTKCTL_EL1", "CNTHCTL_EL2", "CNTKCTL_EL12" },
/*
* Note that redirection of ZCR is mentioned in the description
@@ -7145,7 +7145,7 @@ void register_cp_regs_for_features(ARMCPU *cpu)
if (arm_feature(env, ARM_FEATURE_VBAR)) {
static const ARMCPRegInfo vbar_cp_reginfo[] = {
- { .name = "VBAR", .state = ARM_CP_STATE_BOTH,
+ { .name = "VBAR_EL1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .crn = 12, .crm = 0, .opc1 = 0, .opc2 = 0,
.access = PL1_RW, .writefn = vbar_write,
.accessfn = access_nv1,
@@ -7161,7 +7161,7 @@ void register_cp_regs_for_features(ARMCPU *cpu)
/* Generic registers whose values depend on the implementation */
{
ARMCPRegInfo sctlr = {
- .name = "SCTLR", .state = ARM_CP_STATE_BOTH,
+ .name = "SCTLR_EL1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 1, .crm = 0, .opc2 = 0,
.access = PL1_RW, .accessfn = access_tvm_trvm,
.fgt = FGT_SCTLR_EL1,
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* [PATCH v2 36/36] target/arm: Remove define_arm_vh_e2h_redirects_aliases
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (34 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 35/36] target/arm: Rename some cpreg to their aarch64 names Richard Henderson
@ 2025-09-16 14:22 ` Richard Henderson
2025-09-25 13:27 ` Philippe Mathieu-Daudé
2025-09-25 14:37 ` Peter Maydell
2025-09-25 15:10 ` [PATCH v2 00/36] target/arm: Reorg VHE redirection Peter Maydell
36 siblings, 2 replies; 87+ messages in thread
From: Richard Henderson @ 2025-09-16 14:22 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, peter.maydell
Populate vhe_redir_to_{el2,el01} on each ARMCPRegInfo.
Clear the fields within add_cpreg_to_hashtable_aa32.
Create the FOO_EL12 cpreg within add_cpreg_to_hashtable_aa64;
add ARM_CP_NO_RAW.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpregs.h | 6 +-
target/arm/helper.c | 249 ++++++++++++++++++--------------------------
2 files changed, 107 insertions(+), 148 deletions(-)
diff --git a/target/arm/cpregs.h b/target/arm/cpregs.h
index f5d6a1c386..9818be4429 100644
--- a/target/arm/cpregs.h
+++ b/target/arm/cpregs.h
@@ -918,8 +918,10 @@ struct ARMCPRegInfo {
uint32_t vhe_redir_to_el2;
/*
- * With VHE, with E2H, at EL2+, access to this EL02/EL12 reg
- * redirects to the EL0/EL1 reg with the specified key.
+ * For VHE. Before registration, this field holds the key for an
+ * EL02/EL12 reg to be created to point back to this EL0/EL1 reg.
+ * After registration, this field is set only on the EL02/EL12 reg
+ * and points back to the EL02/EL12 reg for redirection with E2H.
*/
uint32_t vhe_redir_to_el01;
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 4172fcaa21..5353d6a5f0 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -454,6 +454,8 @@ static const ARMCPRegInfo cp_reginfo[] = {
.access = PL1_RW, .accessfn = access_tvm_trvm,
.fgt = FGT_CONTEXTIDR_EL1,
.nv2_redirect_offset = 0x108 | NV2_REDIR_NV1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 13, 0, 1),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 13, 0, 1),
.secure = ARM_CP_SECSTATE_NS,
.fieldoffset = offsetof(CPUARMState, cp15.contextidr_el[1]),
.resetvalue = 0, .writefn = contextidr_write, .raw_writefn = raw_write, },
@@ -674,6 +676,8 @@ static const ARMCPRegInfo v6_cp_reginfo[] = {
{ .name = "CPACR_EL1", .state = ARM_CP_STATE_BOTH, .opc0 = 3,
.crn = 1, .crm = 0, .opc1 = 0, .opc2 = 2, .accessfn = cpacr_access,
.fgt = FGT_CPACR_EL1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 1, 1, 2),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 1, 0, 2),
.nv2_redirect_offset = 0x100 | NV2_REDIR_NV1,
.access = PL1_RW, .fieldoffset = offsetof(CPUARMState, cp15.cpacr_el1),
.resetfn = cpacr_reset, .writefn = cpacr_write, .readfn = cpacr_read },
@@ -956,12 +960,16 @@ static const ARMCPRegInfo v7_cp_reginfo[] = {
.access = PL1_RW, .accessfn = access_tvm_trvm,
.fgt = FGT_AFSR0_EL1,
.nv2_redirect_offset = 0x128 | NV2_REDIR_NV1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 5, 1, 0),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 5, 1, 0),
.type = ARM_CP_CONST, .resetvalue = 0 },
{ .name = "AFSR1_EL1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 5, .crm = 1, .opc2 = 1,
.access = PL1_RW, .accessfn = access_tvm_trvm,
.fgt = FGT_AFSR1_EL1,
.nv2_redirect_offset = 0x130 | NV2_REDIR_NV1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 5, 1, 1),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 5, 1, 1),
.type = ARM_CP_CONST, .resetvalue = 0 },
/*
* MAIR can just read-as-written because we don't implement caches
@@ -972,6 +980,8 @@ static const ARMCPRegInfo v7_cp_reginfo[] = {
.access = PL1_RW, .accessfn = access_tvm_trvm,
.fgt = FGT_MAIR_EL1,
.nv2_redirect_offset = 0x140 | NV2_REDIR_NV1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 10, 2, 0),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 10, 2, 0),
.fieldoffset = offsetof(CPUARMState, cp15.mair_el[1]),
.resetvalue = 0 },
{ .name = "MAIR_EL3", .state = ARM_CP_STATE_AA64,
@@ -2021,6 +2031,8 @@ static const ARMCPRegInfo generic_timer_cp_reginfo[] = {
{ .name = "CNTKCTL_EL1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 14, .crm = 1, .opc2 = 0,
.access = PL1_RW,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 14, 1, 0),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 14, 1, 0),
.fieldoffset = offsetof(CPUARMState, cp15.c14_cntkctl),
.resetvalue = 0,
},
@@ -2811,6 +2823,8 @@ static const ARMCPRegInfo vmsa_pmsa_cp_reginfo[] = {
.access = PL1_RW, .accessfn = access_tvm_trvm,
.fgt = FGT_FAR_EL1,
.nv2_redirect_offset = 0x220 | NV2_REDIR_NV1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 6, 0, 0),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 6, 0, 0),
.fieldoffset = offsetof(CPUARMState, cp15.far_el[1]),
.resetvalue = 0, },
};
@@ -2821,12 +2835,16 @@ static const ARMCPRegInfo vmsa_cp_reginfo[] = {
.access = PL1_RW, .accessfn = access_tvm_trvm,
.fgt = FGT_ESR_EL1,
.nv2_redirect_offset = 0x138 | NV2_REDIR_NV1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 5, 2, 0),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 5, 2, 0),
.fieldoffset = offsetof(CPUARMState, cp15.esr_el[1]), .resetvalue = 0, },
{ .name = "TTBR0_EL1", .state = ARM_CP_STATE_BOTH,
.opc0 = 3, .opc1 = 0, .crn = 2, .crm = 0, .opc2 = 0,
.access = PL1_RW, .accessfn = access_tvm_trvm,
.fgt = FGT_TTBR0_EL1,
.nv2_redirect_offset = 0x200 | NV2_REDIR_NV1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 2, 0, 0),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 2, 0, 0),
.writefn = vmsa_ttbr_write, .resetvalue = 0, .raw_writefn = raw_write,
.bank_fieldoffsets = { offsetof(CPUARMState, cp15.ttbr0_s),
offsetof(CPUARMState, cp15.ttbr0_ns) } },
@@ -2835,6 +2853,8 @@ static const ARMCPRegInfo vmsa_cp_reginfo[] = {
.access = PL1_RW, .accessfn = access_tvm_trvm,
.fgt = FGT_TTBR1_EL1,
.nv2_redirect_offset = 0x210 | NV2_REDIR_NV1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 2, 0, 1),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 2, 0, 1),
.writefn = vmsa_ttbr_write, .resetvalue = 0, .raw_writefn = raw_write,
.bank_fieldoffsets = { offsetof(CPUARMState, cp15.ttbr1_s),
offsetof(CPUARMState, cp15.ttbr1_ns) } },
@@ -2843,6 +2863,8 @@ static const ARMCPRegInfo vmsa_cp_reginfo[] = {
.access = PL1_RW, .accessfn = access_tvm_trvm,
.fgt = FGT_TCR_EL1,
.nv2_redirect_offset = 0x120 | NV2_REDIR_NV1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 2, 0, 2),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 2, 0, 2),
.writefn = vmsa_tcr_el12_write,
.raw_writefn = raw_write,
.resetvalue = 0,
@@ -3083,6 +3105,8 @@ static const ARMCPRegInfo lpae_cp_reginfo[] = {
.access = PL1_RW, .accessfn = access_tvm_trvm,
.fgt = FGT_AMAIR_EL1,
.nv2_redirect_offset = 0x148 | NV2_REDIR_NV1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 10, 3, 0),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 10, 3, 0),
.type = ARM_CP_CONST, .resetvalue = 0 },
/* AMAIR1 is mapped to AMAIR_EL1[63:32] */
{ .name = "AMAIR1", .cp = 15, .crn = 10, .crm = 3, .opc1 = 0, .opc2 = 1,
@@ -3608,12 +3632,16 @@ static const ARMCPRegInfo v8_cp_reginfo[] = {
.opc0 = 3, .opc1 = 0, .crn = 4, .crm = 0, .opc2 = 1,
.access = PL1_RW, .accessfn = access_nv1,
.nv2_redirect_offset = 0x230 | NV2_REDIR_NV1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 4, 0, 1),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 4, 0, 1),
.fieldoffset = offsetof(CPUARMState, elr_el[1]) },
{ .name = "SPSR_EL1", .state = ARM_CP_STATE_AA64,
.type = ARM_CP_ALIAS,
.opc0 = 3, .opc1 = 0, .crn = 4, .crm = 0, .opc2 = 0,
.access = PL1_RW, .accessfn = access_nv1,
.nv2_redirect_offset = 0x160 | NV2_REDIR_NV1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 4, 0, 0),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 4, 0, 0),
.fieldoffset = offsetof(CPUARMState, banked_spsr[BANK_SVC]) },
/*
* We rely on the access checks not allowing the guest to write to the
@@ -4455,142 +4483,6 @@ static CPAccessResult access_el1nvvct(CPUARMState *env, const ARMCPRegInfo *ri,
}
return e2h_access(env, ri, isread);
}
-
-static void define_arm_vh_e2h_redirects_aliases(ARMCPU *cpu)
-{
- struct E2HAlias {
- uint32_t src_key, dst_key, new_key;
- const char *src_name, *dst_name, *new_name;
- bool (*feature)(const ARMISARegisters *id);
- };
-
-#define K(op0, op1, crn, crm, op2) \
- ENCODE_AA64_CP_REG(op0, op1, crn, crm, op2)
-
- static const struct E2HAlias aliases[] = {
- { K(3, 0, 1, 0, 0), K(3, 4, 1, 0, 0), K(3, 5, 1, 0, 0),
- "SCTLR_EL1", "SCTLR_EL2", "SCTLR_EL12" },
- { K(3, 0, 1, 0, 3), K(3, 4, 1, 0, 3), K(3, 5, 1, 0, 3),
- "SCTLR2_EL1", "SCTLR2_EL2", "SCTLR2_EL12", isar_feature_aa64_sctlr2 },
- { K(3, 0, 1, 0, 2), K(3, 4, 1, 1, 2), K(3, 5, 1, 0, 2),
- "CPACR_EL1", "CPTR_EL2", "CPACR_EL12" },
- { K(3, 0, 2, 0, 0), K(3, 4, 2, 0, 0), K(3, 5, 2, 0, 0),
- "TTBR0_EL1", "TTBR0_EL2", "TTBR0_EL12" },
- { K(3, 0, 2, 0, 1), K(3, 4, 2, 0, 1), K(3, 5, 2, 0, 1),
- "TTBR1_EL1", "TTBR1_EL2", "TTBR1_EL12" },
- { K(3, 0, 2, 0, 2), K(3, 4, 2, 0, 2), K(3, 5, 2, 0, 2),
- "TCR_EL1", "TCR_EL2", "TCR_EL12" },
- { K(3, 0, 2, 0, 3), K(3, 4, 2, 0, 3), K(3, 5, 2, 0, 3),
- "TCR2_EL1", "TCR2_EL2", "TCR2_EL12", isar_feature_aa64_tcr2 },
- { K(3, 0, 4, 0, 0), K(3, 4, 4, 0, 0), K(3, 5, 4, 0, 0),
- "SPSR_EL1", "SPSR_EL2", "SPSR_EL12" },
- { K(3, 0, 4, 0, 1), K(3, 4, 4, 0, 1), K(3, 5, 4, 0, 1),
- "ELR_EL1", "ELR_EL2", "ELR_EL12" },
- { K(3, 0, 5, 1, 0), K(3, 4, 5, 1, 0), K(3, 5, 5, 1, 0),
- "AFSR0_EL1", "AFSR0_EL2", "AFSR0_EL12" },
- { K(3, 0, 5, 1, 1), K(3, 4, 5, 1, 1), K(3, 5, 5, 1, 1),
- "AFSR1_EL1", "AFSR1_EL2", "AFSR1_EL12" },
- { K(3, 0, 5, 2, 0), K(3, 4, 5, 2, 0), K(3, 5, 5, 2, 0),
- "ESR_EL1", "ESR_EL2", "ESR_EL12" },
- { K(3, 0, 6, 0, 0), K(3, 4, 6, 0, 0), K(3, 5, 6, 0, 0),
- "FAR_EL1", "FAR_EL2", "FAR_EL12" },
- { K(3, 0, 10, 2, 0), K(3, 4, 10, 2, 0), K(3, 5, 10, 2, 0),
- "MAIR_EL1", "MAIR_EL2", "MAIR_EL12" },
- { K(3, 0, 10, 3, 0), K(3, 4, 10, 3, 0), K(3, 5, 10, 3, 0),
- "AMAIR_EL1", "AMAIR_EL2", "AMAIR_EL12" },
- { K(3, 0, 12, 0, 0), K(3, 4, 12, 0, 0), K(3, 5, 12, 0, 0),
- "VBAR_EL1", "VBAR_EL2", "VBAR_EL12" },
- { K(3, 0, 13, 0, 1), K(3, 4, 13, 0, 1), K(3, 5, 13, 0, 1),
- "CONTEXTIDR_EL1", "CONTEXTIDR_EL2", "CONTEXTIDR_EL12" },
- { K(3, 0, 14, 1, 0), K(3, 4, 14, 1, 0), K(3, 5, 14, 1, 0),
- "CNTKCTL_EL1", "CNTHCTL_EL2", "CNTKCTL_EL12" },
-
- /*
- * Note that redirection of ZCR is mentioned in the description
- * of ZCR_EL2, and aliasing in the description of ZCR_EL1, but
- * not in the summary table.
- */
- { K(3, 0, 1, 2, 0), K(3, 4, 1, 2, 0), K(3, 5, 1, 2, 0),
- "ZCR_EL1", "ZCR_EL2", "ZCR_EL12", isar_feature_aa64_sve },
- { K(3, 0, 1, 2, 6), K(3, 4, 1, 2, 6), K(3, 5, 1, 2, 6),
- "SMCR_EL1", "SMCR_EL2", "SMCR_EL12", isar_feature_aa64_sme },
-
- { K(3, 0, 5, 6, 0), K(3, 4, 5, 6, 0), K(3, 5, 5, 6, 0),
- "TFSR_EL1", "TFSR_EL2", "TFSR_EL12", isar_feature_aa64_mte },
-
- { K(3, 0, 13, 0, 7), K(3, 4, 13, 0, 7), K(3, 5, 13, 0, 7),
- "SCXTNUM_EL1", "SCXTNUM_EL2", "SCXTNUM_EL12",
- isar_feature_aa64_scxtnum },
-
- /* TODO: ARMv8.2-SPE -- PMSCR_EL2 */
- /* TODO: ARMv8.4-Trace -- TRFCR_EL2 */
- };
-#undef K
-
- size_t i;
-
- for (i = 0; i < ARRAY_SIZE(aliases); i++) {
- const struct E2HAlias *a = &aliases[i];
- ARMCPRegInfo *src_reg, *dst_reg, *new_reg;
- bool ok;
-
- if (a->feature && !a->feature(&cpu->isar)) {
- continue;
- }
-
- src_reg = g_hash_table_lookup(cpu->cp_regs,
- (gpointer)(uintptr_t)a->src_key);
- dst_reg = g_hash_table_lookup(cpu->cp_regs,
- (gpointer)(uintptr_t)a->dst_key);
- g_assert(src_reg != NULL);
- g_assert(dst_reg != NULL);
-
- /* Cross-compare names to detect typos in the keys. */
- g_assert(strcmp(src_reg->name, a->src_name) == 0);
- g_assert(strcmp(dst_reg->name, a->dst_name) == 0);
-
- /* Create alias before redirection so we dup the right data. */
- new_reg = g_memdup(src_reg, sizeof(ARMCPRegInfo));
-
- new_reg->name = a->new_name;
- new_reg->type |= ARM_CP_ALIAS;
- /* Remove PL1/PL0 access, leaving PL2/PL3 R/W in place. */
- new_reg->access &= PL2_RW | PL3_RW;
- /* The new_reg op fields are as per new_key, not the target reg */
- new_reg->crn = (a->new_key & CP_REG_ARM64_SYSREG_CRN_MASK)
- >> CP_REG_ARM64_SYSREG_CRN_SHIFT;
- new_reg->crm = (a->new_key & CP_REG_ARM64_SYSREG_CRM_MASK)
- >> CP_REG_ARM64_SYSREG_CRM_SHIFT;
- new_reg->opc0 = (a->new_key & CP_REG_ARM64_SYSREG_OP0_MASK)
- >> CP_REG_ARM64_SYSREG_OP0_SHIFT;
- new_reg->opc1 = (a->new_key & CP_REG_ARM64_SYSREG_OP1_MASK)
- >> CP_REG_ARM64_SYSREG_OP1_SHIFT;
- new_reg->opc2 = (a->new_key & CP_REG_ARM64_SYSREG_OP2_MASK)
- >> CP_REG_ARM64_SYSREG_OP2_SHIFT;
- new_reg->vhe_redir_to_el01 = a->src_key;
- new_reg->readfn = NULL;
- new_reg->writefn = NULL;
- new_reg->accessfn = NULL;
- new_reg->fieldoffset = 0;
-
- /*
- * If the _EL1 register is redirected to memory by FEAT_NV2,
- * then it shares the offset with the _EL12 register,
- * and which one is redirected depends on HCR_EL2.NV1.
- */
- if (new_reg->nv2_redirect_offset) {
- assert(new_reg->nv2_redirect_offset & NV2_REDIR_NV1);
- new_reg->nv2_redirect_offset &= ~NV2_REDIR_NV1;
- new_reg->nv2_redirect_offset |= NV2_REDIR_NO_NV1;
- }
-
- ok = g_hash_table_insert(cpu->cp_regs,
- (gpointer)(uintptr_t)a->new_key, new_reg);
- g_assert(ok);
-
- src_reg->vhe_redir_to_el2 = a->dst_key;
- }
-}
#endif
static CPAccessResult ctr_el0_access(CPUARMState *env, const ARMCPRegInfo *ri,
@@ -4883,6 +4775,8 @@ static const ARMCPRegInfo zcr_reginfo[] = {
{ .name = "ZCR_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 1, .crm = 2, .opc2 = 0,
.nv2_redirect_offset = 0x1e0 | NV2_REDIR_NV1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 1, 2, 0),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 1, 2, 0),
.access = PL1_RW, .type = ARM_CP_SVE,
.fieldoffset = offsetof(CPUARMState, vfp.zcr_el[1]),
.writefn = zcr_write, .raw_writefn = raw_write },
@@ -5028,6 +4922,8 @@ static const ARMCPRegInfo sme_reginfo[] = {
{ .name = "SMCR_EL1", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 0, .crn = 1, .crm = 2, .opc2 = 6,
.nv2_redirect_offset = 0x1f0 | NV2_REDIR_NV1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 1, 2, 6),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 1, 2, 6),
.access = PL1_RW, .type = ARM_CP_SME,
.fieldoffset = offsetof(CPUARMState, vfp.smcr_el[1]),
.writefn = smcr_write, .raw_writefn = raw_write },
@@ -5473,6 +5369,8 @@ static const ARMCPRegInfo mte_reginfo[] = {
.opc0 = 3, .opc1 = 0, .crn = 5, .crm = 6, .opc2 = 0,
.access = PL1_RW, .accessfn = access_tfsr_el1,
.nv2_redirect_offset = 0x190 | NV2_REDIR_NV1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 5, 6, 0),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 5, 6, 0),
.fieldoffset = offsetof(CPUARMState, cp15.tfsr_el[1]) },
{ .name = "TFSR_EL2", .state = ARM_CP_STATE_AA64,
.type = ARM_CP_NV2_REDIRECT,
@@ -5648,6 +5546,8 @@ static const ARMCPRegInfo scxtnum_reginfo[] = {
.access = PL1_RW, .accessfn = access_scxtnum_el1,
.fgt = FGT_SCXTNUM_EL1,
.nv2_redirect_offset = 0x188 | NV2_REDIR_NV1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 13, 0, 7),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 13, 0, 7),
.fieldoffset = offsetof(CPUARMState, scxtnum_el[1]) },
{ .name = "SCXTNUM_EL2", .state = ARM_CP_STATE_AA64,
.opc0 = 3, .opc1 = 4, .crn = 13, .crm = 0, .opc2 = 7,
@@ -5992,6 +5892,8 @@ static const ARMCPRegInfo sctlr2_reginfo[] = {
.opc0 = 3, .opc1 = 0, .opc2 = 3, .crn = 1, .crm = 0,
.access = PL1_RW, .accessfn = sctlr2_el1_access,
.writefn = sctlr2_el1_write, .fgt = FGT_SCTLR_EL1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 1, 0, 3),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 1, 0, 3),
.nv2_redirect_offset = 0x278 | NV2_REDIR_NV1,
.fieldoffset = offsetof(CPUARMState, cp15.sctlr2_el[1]) },
{ .name = "SCTLR2_EL2", .state = ARM_CP_STATE_AA64,
@@ -6052,6 +5954,8 @@ static const ARMCPRegInfo tcr2_reginfo[] = {
.opc0 = 3, .opc1 = 0, .opc2 = 3, .crn = 2, .crm = 0,
.access = PL1_RW, .accessfn = tcr2_el1_access,
.writefn = tcr2_el1_write, .fgt = FGT_TCR_EL1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 2, 0, 3),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 2, 0, 3),
.nv2_redirect_offset = 0x270 | NV2_REDIR_NV1,
.fieldoffset = offsetof(CPUARMState, cp15.tcr2_el[1]) },
{ .name = "TCR2_EL2", .state = ARM_CP_STATE_AA64,
@@ -7151,6 +7055,8 @@ void register_cp_regs_for_features(ARMCPU *cpu)
.accessfn = access_nv1,
.fgt = FGT_VBAR_EL1,
.nv2_redirect_offset = 0x250 | NV2_REDIR_NV1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 12, 0, 0),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 12, 0, 0),
.bank_fieldoffsets = { offsetof(CPUARMState, cp15.vbar_s),
offsetof(CPUARMState, cp15.vbar_ns) },
.resetvalue = 0 },
@@ -7165,6 +7071,8 @@ void register_cp_regs_for_features(ARMCPU *cpu)
.opc0 = 3, .opc1 = 0, .crn = 1, .crm = 0, .opc2 = 0,
.access = PL1_RW, .accessfn = access_tvm_trvm,
.fgt = FGT_SCTLR_EL1,
+ .vhe_redir_to_el2 = ENCODE_AA64_CP_REG(3, 4, 1, 0, 0),
+ .vhe_redir_to_el01 = ENCODE_AA64_CP_REG(3, 5, 1, 0, 0),
.nv2_redirect_offset = 0x110 | NV2_REDIR_NV1,
.bank_fieldoffsets = { offsetof(CPUARMState, cp15.sctlr_s),
offsetof(CPUARMState, cp15.sctlr_ns) },
@@ -7307,16 +7215,6 @@ void register_cp_regs_for_features(ARMCPU *cpu)
}
define_pm_cpregs(cpu);
-
-#ifndef CONFIG_USER_ONLY
- /*
- * Register redirections and aliases must be done last,
- * after the registers from the other extensions have been defined.
- */
- if (arm_feature(env, ARM_FEATURE_EL2) && cpu_isar_feature(aa64_vh, cpu)) {
- define_arm_vh_e2h_redirects_aliases(cpu);
- }
-#endif
}
/*
@@ -7449,6 +7347,8 @@ static void add_cpreg_to_hashtable_aa32(ARMCPU *cpu, ARMCPRegInfo *r)
r->crm, r->opc1, r->opc2);
assert(!(r->type & ARM_CP_ADD_TLBI_NXS)); /* aa64 only */
+ r->vhe_redir_to_el2 = 0;
+ r->vhe_redir_to_el01 = 0;
switch (r->secure) {
case ARM_CP_SECSTATE_NS:
@@ -7502,6 +7402,63 @@ static void add_cpreg_to_hashtable_aa64(ARMCPU *cpu, ARMCPRegInfo *r)
ARM_CP_SECSTATE_NS, nxs_key);
}
+ if (!r->vhe_redir_to_el01) {
+ assert(!r->vhe_redir_to_el2);
+ } else if (!arm_feature(&cpu->env, ARM_FEATURE_EL2) ||
+ !cpu_isar_feature(aa64_vh, cpu)) {
+ r->vhe_redir_to_el2 = 0;
+ r->vhe_redir_to_el01 = 0;
+ } else {
+ /* Create the FOO_EL12 alias. */
+ ARMCPRegInfo *r2 = alloc_cpreg(r, "2");
+ uint32_t key2 = r->vhe_redir_to_el01;
+
+ /*
+ * Clear EL1 redirection on the FOO_EL1 reg;
+ * Clear EL2 redirection on the FOO_EL12 reg;
+ * Install redirection from FOO_EL12 back to FOO_EL1.
+ */
+ r->vhe_redir_to_el01 = 0;
+ r2->vhe_redir_to_el2 = 0;
+ r2->vhe_redir_to_el01 = key;
+
+ r2->type |= ARM_CP_ALIAS | ARM_CP_NO_RAW;
+ /* Remove PL1/PL0 access, leaving PL2/PL3 R/W in place. */
+ r2->access &= PL2_RW | PL3_RW;
+ /* The new_reg op fields are as per new_key, not the target reg */
+ r2->crn = (key2 & CP_REG_ARM64_SYSREG_CRN_MASK)
+ >> CP_REG_ARM64_SYSREG_CRN_SHIFT;
+ r2->crm = (key2 & CP_REG_ARM64_SYSREG_CRM_MASK)
+ >> CP_REG_ARM64_SYSREG_CRM_SHIFT;
+ r2->opc0 = (key2 & CP_REG_ARM64_SYSREG_OP0_MASK)
+ >> CP_REG_ARM64_SYSREG_OP0_SHIFT;
+ r2->opc1 = (key2 & CP_REG_ARM64_SYSREG_OP1_MASK)
+ >> CP_REG_ARM64_SYSREG_OP1_SHIFT;
+ r2->opc2 = (key2 & CP_REG_ARM64_SYSREG_OP2_MASK)
+ >> CP_REG_ARM64_SYSREG_OP2_SHIFT;
+
+ /* Non-redirected access to this register will abort. */
+ r2->readfn = NULL;
+ r2->writefn = NULL;
+ r2->raw_readfn = NULL;
+ r2->raw_writefn = NULL;
+ r2->accessfn = NULL;
+ r2->fieldoffset = 0;
+
+ /*
+ * If the _EL1 register is redirected to memory by FEAT_NV2,
+ * then it shares the offset with the _EL12 register,
+ * and which one is redirected depends on HCR_EL2.NV1.
+ */
+ if (r2->nv2_redirect_offset) {
+ assert(r2->nv2_redirect_offset & NV2_REDIR_NV1);
+ r2->nv2_redirect_offset &= ~NV2_REDIR_NV1;
+ r2->nv2_redirect_offset |= NV2_REDIR_NO_NV1;
+ }
+ add_cpreg_to_hashtable(cpu, r2, ARM_CP_STATE_AA64,
+ ARM_CP_SECSTATE_NS, key2);
+ }
+
add_cpreg_to_hashtable(cpu, r, ARM_CP_STATE_AA64,
ARM_CP_SECSTATE_NS, key);
}
--
2.43.0
^ permalink raw reply related [flat|nested] 87+ messages in thread* Re: [PATCH v2 36/36] target/arm: Remove define_arm_vh_e2h_redirects_aliases
2025-09-16 14:22 ` [PATCH v2 36/36] target/arm: Remove define_arm_vh_e2h_redirects_aliases Richard Henderson
@ 2025-09-25 13:27 ` Philippe Mathieu-Daudé
2025-09-25 14:37 ` Peter Maydell
1 sibling, 0 replies; 87+ messages in thread
From: Philippe Mathieu-Daudé @ 2025-09-25 13:27 UTC (permalink / raw)
To: Richard Henderson, qemu-devel; +Cc: qemu-arm, peter.maydell
On 16/9/25 16:22, Richard Henderson wrote:
> Populate vhe_redir_to_{el2,el01} on each ARMCPRegInfo.
> Clear the fields within add_cpreg_to_hashtable_aa32.
> Create the FOO_EL12 cpreg within add_cpreg_to_hashtable_aa64;
> add ARM_CP_NO_RAW.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> target/arm/cpregs.h | 6 +-
> target/arm/helper.c | 249 ++++++++++++++++++--------------------------
> 2 files changed, 107 insertions(+), 148 deletions(-)
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
^ permalink raw reply [flat|nested] 87+ messages in thread* Re: [PATCH v2 36/36] target/arm: Remove define_arm_vh_e2h_redirects_aliases
2025-09-16 14:22 ` [PATCH v2 36/36] target/arm: Remove define_arm_vh_e2h_redirects_aliases Richard Henderson
2025-09-25 13:27 ` Philippe Mathieu-Daudé
@ 2025-09-25 14:37 ` Peter Maydell
1 sibling, 0 replies; 87+ messages in thread
From: Peter Maydell @ 2025-09-25 14:37 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-devel, qemu-arm
On Tue, 16 Sept 2025 at 15:23, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> Populate vhe_redir_to_{el2,el01} on each ARMCPRegInfo.
> Clear the fields within add_cpreg_to_hashtable_aa32.
> Create the FOO_EL12 cpreg within add_cpreg_to_hashtable_aa64;
> add ARM_CP_NO_RAW.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
thanks
-- PMM
^ permalink raw reply [flat|nested] 87+ messages in thread
* Re: [PATCH v2 00/36] target/arm: Reorg VHE redirection
2025-09-16 14:22 [PATCH v2 00/36] target/arm: Reorg VHE redirection Richard Henderson
` (35 preceding siblings ...)
2025-09-16 14:22 ` [PATCH v2 36/36] target/arm: Remove define_arm_vh_e2h_redirects_aliases Richard Henderson
@ 2025-09-25 15:10 ` Peter Maydell
36 siblings, 0 replies; 87+ messages in thread
From: Peter Maydell @ 2025-09-25 15:10 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-devel, qemu-arm
On Tue, 16 Sept 2025 at 15:22, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> Prerequisite for FEAT_SYSREG128, split out of
>
> 20250827010453.4059782-1-richard.henderson@linaro.org
> [RFC PATCH 00/61] target/arm: Implement FEAT_SYSREG128
>
> which also reorganizes how ARMCPRegInfo are allocated during registration.
>
Applied to target-arm.next (with a few minor tweaks as
noted in my replies). Thanks to Manos and Philippe
for doing the review here.
-- PMM
^ permalink raw reply [flat|nested] 87+ messages in thread