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-rw-r--r--target-arm/kvm.c98
-rw-r--r--target-arm/kvm32.c94
-rw-r--r--target-arm/kvm64.c24
-rw-r--r--target-arm/kvm_arm.h22
4 files changed, 137 insertions, 101 deletions
diff --git a/target-arm/kvm.c b/target-arm/kvm.c
index 319784d689..191e759b3b 100644
--- a/target-arm/kvm.c
+++ b/target-arm/kvm.c
@@ -21,6 +21,7 @@
#include "sysemu/kvm.h"
#include "kvm_arm.h"
#include "cpu.h"
+#include "internals.h"
#include "hw/arm/arm.h"
const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
@@ -279,6 +280,94 @@ 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;
+}
+
+/* Initialize the CPUState's cpreg list according to the kernel's
+ * definition of what CPU registers it knows about (and throw away
+ * the previous TCG-created cpreg list).
+ */
+int kvm_arm_init_cpreg_list(ARMCPU *cpu)
+{
+ struct kvm_reg_list rl;
+ struct kvm_reg_list *rlp;
+ int i, ret, arraylen;
+ CPUState *cs = CPU(cpu);
+
+ rl.n = 0;
+ ret = kvm_vcpu_ioctl(cs, KVM_GET_REG_LIST, &rl);
+ if (ret != -E2BIG) {
+ return ret;
+ }
+ rlp = g_malloc(sizeof(struct kvm_reg_list) + rl.n * sizeof(uint64_t));
+ rlp->n = rl.n;
+ ret = kvm_vcpu_ioctl(cs, KVM_GET_REG_LIST, rlp);
+ if (ret) {
+ goto out;
+ }
+ /* Sort the list we get back from the kernel, since cpreg_tuples
+ * must be in strictly ascending order.
+ */
+ qsort(&rlp->reg, rlp->n, sizeof(rlp->reg[0]), compare_u64);
+
+ for (i = 0, arraylen = 0; i < rlp->n; i++) {
+ if (!kvm_arm_reg_syncs_via_cpreg_list(rlp->reg[i])) {
+ continue;
+ }
+ switch (rlp->reg[i] & KVM_REG_SIZE_MASK) {
+ case KVM_REG_SIZE_U32:
+ case KVM_REG_SIZE_U64:
+ break;
+ default:
+ fprintf(stderr, "Can't handle size of register in kernel list\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+ arraylen++;
+ }
+
+ cpu->cpreg_indexes = g_renew(uint64_t, cpu->cpreg_indexes, arraylen);
+ cpu->cpreg_values = g_renew(uint64_t, cpu->cpreg_values, arraylen);
+ cpu->cpreg_vmstate_indexes = g_renew(uint64_t, cpu->cpreg_vmstate_indexes,
+ arraylen);
+ cpu->cpreg_vmstate_values = g_renew(uint64_t, cpu->cpreg_vmstate_values,
+ arraylen);
+ cpu->cpreg_array_len = arraylen;
+ cpu->cpreg_vmstate_array_len = arraylen;
+
+ for (i = 0, arraylen = 0; i < rlp->n; i++) {
+ uint64_t regidx = rlp->reg[i];
+ if (!kvm_arm_reg_syncs_via_cpreg_list(regidx)) {
+ continue;
+ }
+ cpu->cpreg_indexes[arraylen] = regidx;
+ arraylen++;
+ }
+ assert(cpu->cpreg_array_len == arraylen);
+
+ if (!write_kvmstate_to_list(cpu)) {
+ /* Shouldn't happen unless kernel is inconsistent about
+ * what registers exist.
+ */
+ fprintf(stderr, "Initial read of kernel register state failed\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
+out:
+ g_free(rlp);
+ return ret;
+}
+
bool write_kvmstate_to_list(ARMCPU *cpu)
{
CPUState *cs = CPU(cpu);
@@ -351,6 +440,15 @@ bool write_list_to_kvmstate(ARMCPU *cpu)
return ok;
}
+void kvm_arm_reset_vcpu(ARMCPU *cpu)
+{
+ /* Re-init VCPU so that all registers are set to
+ * their respective reset values.
+ */
+ kvm_arm_vcpu_init(CPU(cpu));
+ write_kvmstate_to_list(cpu);
+}
+
void kvm_arch_pre_run(CPUState *cs, struct kvm_run *run)
{
}
diff --git a/target-arm/kvm32.c b/target-arm/kvm32.c
index a5e67daa6d..94030d1acb 100644
--- a/target-arm/kvm32.c
+++ b/target-arm/kvm32.c
@@ -138,7 +138,7 @@ bool kvm_arm_get_host_cpu_features(ARMHostCPUClass *ahcc)
return true;
}
-static bool reg_syncs_via_tuple_list(uint64_t regidx)
+bool kvm_arm_reg_syncs_via_cpreg_list(uint64_t regidx)
{
/* Return true if the regidx is a register we should synchronize
* via the cpreg_tuples array (ie is not a core reg we sync by
@@ -153,24 +153,11 @@ static bool reg_syncs_via_tuple_list(uint64_t regidx)
}
}
-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;
-}
-
int kvm_arch_init_vcpu(CPUState *cs)
{
- int i, ret, arraylen;
+ int ret;
uint64_t v;
struct kvm_one_reg r;
- struct kvm_reg_list rl;
- struct kvm_reg_list *rlp;
ARMCPU *cpu = ARM_CPU(cs);
if (cpu->kvm_target == QEMU_KVM_ARM_TARGET_NONE) {
@@ -206,73 +193,7 @@ int kvm_arch_init_vcpu(CPUState *cs)
return -EINVAL;
}
- /* Populate the cpreg list based on the kernel's idea
- * of what registers exist (and throw away the TCG-created list).
- */
- rl.n = 0;
- ret = kvm_vcpu_ioctl(cs, KVM_GET_REG_LIST, &rl);
- if (ret != -E2BIG) {
- return ret;
- }
- rlp = g_malloc(sizeof(struct kvm_reg_list) + rl.n * sizeof(uint64_t));
- rlp->n = rl.n;
- ret = kvm_vcpu_ioctl(cs, KVM_GET_REG_LIST, rlp);
- if (ret) {
- goto out;
- }
- /* Sort the list we get back from the kernel, since cpreg_tuples
- * must be in strictly ascending order.
- */
- qsort(&rlp->reg, rlp->n, sizeof(rlp->reg[0]), compare_u64);
-
- for (i = 0, arraylen = 0; i < rlp->n; i++) {
- if (!reg_syncs_via_tuple_list(rlp->reg[i])) {
- continue;
- }
- switch (rlp->reg[i] & KVM_REG_SIZE_MASK) {
- case KVM_REG_SIZE_U32:
- case KVM_REG_SIZE_U64:
- break;
- default:
- fprintf(stderr, "Can't handle size of register in kernel list\n");
- ret = -EINVAL;
- goto out;
- }
-
- arraylen++;
- }
-
- cpu->cpreg_indexes = g_renew(uint64_t, cpu->cpreg_indexes, arraylen);
- cpu->cpreg_values = g_renew(uint64_t, cpu->cpreg_values, arraylen);
- cpu->cpreg_vmstate_indexes = g_renew(uint64_t, cpu->cpreg_vmstate_indexes,
- arraylen);
- cpu->cpreg_vmstate_values = g_renew(uint64_t, cpu->cpreg_vmstate_values,
- arraylen);
- cpu->cpreg_array_len = arraylen;
- cpu->cpreg_vmstate_array_len = arraylen;
-
- for (i = 0, arraylen = 0; i < rlp->n; i++) {
- uint64_t regidx = rlp->reg[i];
- if (!reg_syncs_via_tuple_list(regidx)) {
- continue;
- }
- cpu->cpreg_indexes[arraylen] = regidx;
- arraylen++;
- }
- assert(cpu->cpreg_array_len == arraylen);
-
- if (!write_kvmstate_to_list(cpu)) {
- /* Shouldn't happen unless kernel is inconsistent about
- * what registers exist.
- */
- fprintf(stderr, "Initial read of kernel register state failed\n");
- ret = -EINVAL;
- goto out;
- }
-
-out:
- g_free(rlp);
- return ret;
+ return kvm_arm_init_cpreg_list(cpu);
}
typedef struct Reg {
@@ -508,12 +429,3 @@ int kvm_arch_get_registers(CPUState *cs)
return 0;
}
-
-void kvm_arm_reset_vcpu(ARMCPU *cpu)
-{
- /* Re-init VCPU so that all registers are set to
- * their respective reset values.
- */
- kvm_arm_vcpu_init(CPU(cpu));
- write_kvmstate_to_list(cpu);
-}
diff --git a/target-arm/kvm64.c b/target-arm/kvm64.c
index c615286158..ba16821737 100644
--- a/target-arm/kvm64.c
+++ b/target-arm/kvm64.c
@@ -103,9 +103,21 @@ int kvm_arch_init_vcpu(CPUState *cs)
return ret;
}
- /* TODO : support for save/restore/reset of system regs via tuple list */
+ return kvm_arm_init_cpreg_list(cpu);
+}
- return 0;
+bool kvm_arm_reg_syncs_via_cpreg_list(uint64_t regidx)
+{
+ /* Return true if the regidx is a register we should synchronize
+ * via the cpreg_tuples array (ie is not a core reg we sync by
+ * hand in kvm_arch_get/put_registers())
+ */
+ switch (regidx & KVM_REG_ARM_COPROC_MASK) {
+ case KVM_REG_ARM_CORE:
+ return false;
+ default:
+ return true;
+ }
}
#define AARCH64_CORE_REG(x) (KVM_REG_ARM64 | KVM_REG_SIZE_U64 | \
@@ -260,11 +272,3 @@ int kvm_arch_get_registers(CPUState *cs)
/* TODO: other registers */
return ret;
}
-
-void kvm_arm_reset_vcpu(ARMCPU *cpu)
-{
- /* Re-init VCPU so that all registers are set to
- * their respective reset values.
- */
- kvm_arm_vcpu_init(CPU(cpu));
-}
diff --git a/target-arm/kvm_arm.h b/target-arm/kvm_arm.h
index af93105517..455dea3f3f 100644
--- a/target-arm/kvm_arm.h
+++ b/target-arm/kvm_arm.h
@@ -47,6 +47,28 @@ void kvm_arm_register_device(MemoryRegion *mr, uint64_t devid, uint64_t group,
uint64_t attr, int dev_fd);
/**
+ * kvm_arm_init_cpreg_list:
+ * @cs: CPUState
+ *
+ * Initialize the CPUState's cpreg list according to the kernel's
+ * definition of what CPU registers it knows about (and throw away
+ * the previous TCG-created cpreg list).
+ *
+ * Returns: 0 if success, else < 0 error code
+ */
+int kvm_arm_init_cpreg_list(ARMCPU *cpu);
+
+/**
+ * kvm_arm_reg_syncs_via_cpreg_list
+ * regidx: KVM register index
+ *
+ * Return true if this KVM register should be synchronized via the
+ * cpreg list of arbitrary system registers, false if it is synchronized
+ * by hand using code in kvm_arch_get/put_registers().
+ */
+bool kvm_arm_reg_syncs_via_cpreg_list(uint64_t regidx);
+
+/**
* write_list_to_kvmstate:
* @cpu: ARMCPU
*
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-13 01:58:38 +0000