[PATCH v5 4/7] mips/kvm: Support unsigned KVM registers

James Hogan
2016-02-03T17:17:14Z

Add KVM register access functions for the uint32_t type. This is
required for FP and MSA control registers, which are represented as
unsigned 32-bit integers.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Leon Alrae <leon.alrae@imgtec.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
---
Changes in v3:
- Fix big endian (the pointer passed to the kernel must be for the
actual 32-bit value, not a temporary 64-bit value, otherwise on big
endian systems the kernel will only interpret the upper half).
---
target-mips/kvm.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)

diff --git a/target-mips/kvm.c b/target-mips/kvm.c
index 57cde9dd4df6..abdd6b66256c 100644
--- a/target-mips/kvm.c
+++ b/target-mips/kvm.c
@@ -248,6 +248,17 @@ static inline int kvm_mips_put_one_reg(CPUState *cs, uint64_t reg_id,
return kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &cp0reg);
}

+static inline int kvm_mips_put_one_ureg(CPUState *cs, uint64_t reg_id,
+ uint32_t *addr)
+{
+ struct kvm_one_reg cp0reg = {
+ .id = reg_id,
+ .addr = (uintptr_t)addr
+ };
+
+ return kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &cp0reg);
+}
+
static inline int kvm_mips_put_one_ulreg(CPUState *cs, uint64_t reg_id,
target_ulong *addr)
{
@@ -282,6 +293,17 @@ static inline int kvm_mips_get_one_reg(CPUState *cs, uint64_t reg_id,
return kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &cp0reg);
}

+static inline int kvm_mips_get_one_ureg(CPUState *cs, uint64_t reg_id,
+ uint32_t *addr)
+{
+ struct kvm_one_reg cp0reg = {
+ .id = reg_id,
+ .addr = (uintptr_t)addr
+ };
+
+ return kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &cp0reg);
+}
+
static inline int kvm_mips_get_one_ulreg(CPUState *cs, uint64_t reg_id,
target_ulong *addr)
{
--
2.4.10