From 03cbfd7b5cdb00a7dfadf502b5acdeeefd69422c Mon Sep 17 00:00:00 2001 From: James Hogan Date: Wed, 3 Feb 2016 17:16:49 +0000 Subject: mips/kvm: Implement Config CP0 registers Implement saving and restoring to KVM state of the Config CP0 registers (namely Config, Config1, Config2, Config3, Config4, and Config5). These control the features available to a guest, and a few of the fields will soon be writeable by a guest so QEMU needs to know about them so as not to clobber them on migration/savevm. Signed-off-by: James Hogan Cc: Paolo Bonzini Cc: Leon Alrae Cc: Aurelien Jarno Signed-off-by: Leon Alrae --- target-mips/kvm.c | 106 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 106 insertions(+) (limited to 'target-mips') diff --git a/target-mips/kvm.c b/target-mips/kvm.c index c5bf44da9f..57cde9dd4d 100644 --- a/target-mips/kvm.c +++ b/target-mips/kvm.c @@ -229,6 +229,12 @@ int kvm_mips_set_ipi_interrupt(MIPSCPU *cpu, int irq, int level) #define KVM_REG_MIPS_CP0_CAUSE MIPS_CP0_32(13, 0) #define KVM_REG_MIPS_CP0_EPC MIPS_CP0_64(14, 0) #define KVM_REG_MIPS_CP0_PRID MIPS_CP0_32(15, 0) +#define KVM_REG_MIPS_CP0_CONFIG MIPS_CP0_32(16, 0) +#define KVM_REG_MIPS_CP0_CONFIG1 MIPS_CP0_32(16, 1) +#define KVM_REG_MIPS_CP0_CONFIG2 MIPS_CP0_32(16, 2) +#define KVM_REG_MIPS_CP0_CONFIG3 MIPS_CP0_32(16, 3) +#define KVM_REG_MIPS_CP0_CONFIG4 MIPS_CP0_32(16, 4) +#define KVM_REG_MIPS_CP0_CONFIG5 MIPS_CP0_32(16, 5) #define KVM_REG_MIPS_CP0_ERROREPC MIPS_CP0_64(30, 0) static inline int kvm_mips_put_one_reg(CPUState *cs, uint64_t reg_id, @@ -304,6 +310,34 @@ static inline int kvm_mips_get_one_reg64(CPUState *cs, uint64_t reg_id, return kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &cp0reg); } +#define KVM_REG_MIPS_CP0_CONFIG_MASK (1U << CP0C0_M) +#define KVM_REG_MIPS_CP0_CONFIG1_MASK (1U << CP0C1_M) +#define KVM_REG_MIPS_CP0_CONFIG2_MASK (1U << CP0C2_M) +#define KVM_REG_MIPS_CP0_CONFIG3_MASK (1U << CP0C3_M) +#define KVM_REG_MIPS_CP0_CONFIG4_MASK (1U << CP0C4_M) +#define KVM_REG_MIPS_CP0_CONFIG5_MASK 0 + +static inline int kvm_mips_change_one_reg(CPUState *cs, uint64_t reg_id, + int32_t *addr, int32_t mask) +{ + int err; + int32_t tmp, change; + + err = kvm_mips_get_one_reg(cs, reg_id, &tmp); + if (err < 0) { + return err; + } + + /* only change bits in mask */ + change = (*addr ^ tmp) & mask; + if (!change) { + return 0; + } + + tmp = tmp ^ change; + return kvm_mips_put_one_reg(cs, reg_id, &tmp); +} + /* * We freeze the KVM timer when either the VM clock is stopped or the state is * saved (the state is dirty). @@ -526,6 +560,48 @@ static int kvm_mips_put_cp0_registers(CPUState *cs, int level) DPRINTF("%s: Failed to put CP0_PRID (%d)\n", __func__, err); ret = err; } + err = kvm_mips_change_one_reg(cs, KVM_REG_MIPS_CP0_CONFIG, + &env->CP0_Config0, + KVM_REG_MIPS_CP0_CONFIG_MASK); + if (err < 0) { + DPRINTF("%s: Failed to change CP0_CONFIG (%d)\n", __func__, err); + ret = err; + } + err = kvm_mips_change_one_reg(cs, KVM_REG_MIPS_CP0_CONFIG1, + &env->CP0_Config1, + KVM_REG_MIPS_CP0_CONFIG1_MASK); + if (err < 0) { + DPRINTF("%s: Failed to change CP0_CONFIG1 (%d)\n", __func__, err); + ret = err; + } + err = kvm_mips_change_one_reg(cs, KVM_REG_MIPS_CP0_CONFIG2, + &env->CP0_Config2, + KVM_REG_MIPS_CP0_CONFIG2_MASK); + if (err < 0) { + DPRINTF("%s: Failed to change CP0_CONFIG2 (%d)\n", __func__, err); + ret = err; + } + err = kvm_mips_change_one_reg(cs, KVM_REG_MIPS_CP0_CONFIG3, + &env->CP0_Config3, + KVM_REG_MIPS_CP0_CONFIG3_MASK); + if (err < 0) { + DPRINTF("%s: Failed to change CP0_CONFIG3 (%d)\n", __func__, err); + ret = err; + } + err = kvm_mips_change_one_reg(cs, KVM_REG_MIPS_CP0_CONFIG4, + &env->CP0_Config4, + KVM_REG_MIPS_CP0_CONFIG4_MASK); + if (err < 0) { + DPRINTF("%s: Failed to change CP0_CONFIG4 (%d)\n", __func__, err); + ret = err; + } + err = kvm_mips_change_one_reg(cs, KVM_REG_MIPS_CP0_CONFIG5, + &env->CP0_Config5, + KVM_REG_MIPS_CP0_CONFIG5_MASK); + if (err < 0) { + DPRINTF("%s: Failed to change CP0_CONFIG5 (%d)\n", __func__, err); + ret = err; + } err = kvm_mips_put_one_ulreg(cs, KVM_REG_MIPS_CP0_ERROREPC, &env->CP0_ErrorEPC); if (err < 0) { @@ -617,6 +693,36 @@ static int kvm_mips_get_cp0_registers(CPUState *cs) DPRINTF("%s: Failed to get CP0_PRID (%d)\n", __func__, err); ret = err; } + err = kvm_mips_get_one_reg(cs, KVM_REG_MIPS_CP0_CONFIG, &env->CP0_Config0); + if (err < 0) { + DPRINTF("%s: Failed to get CP0_CONFIG (%d)\n", __func__, err); + ret = err; + } + err = kvm_mips_get_one_reg(cs, KVM_REG_MIPS_CP0_CONFIG1, &env->CP0_Config1); + if (err < 0) { + DPRINTF("%s: Failed to get CP0_CONFIG1 (%d)\n", __func__, err); + ret = err; + } + err = kvm_mips_get_one_reg(cs, KVM_REG_MIPS_CP0_CONFIG2, &env->CP0_Config2); + if (err < 0) { + DPRINTF("%s: Failed to get CP0_CONFIG2 (%d)\n", __func__, err); + ret = err; + } + err = kvm_mips_get_one_reg(cs, KVM_REG_MIPS_CP0_CONFIG3, &env->CP0_Config3); + if (err < 0) { + DPRINTF("%s: Failed to get CP0_CONFIG3 (%d)\n", __func__, err); + ret = err; + } + err = kvm_mips_get_one_reg(cs, KVM_REG_MIPS_CP0_CONFIG4, &env->CP0_Config4); + if (err < 0) { + DPRINTF("%s: Failed to get CP0_CONFIG4 (%d)\n", __func__, err); + ret = err; + } + err = kvm_mips_get_one_reg(cs, KVM_REG_MIPS_CP0_CONFIG5, &env->CP0_Config5); + if (err < 0) { + DPRINTF("%s: Failed to get CP0_CONFIG5 (%d)\n", __func__, err); + ret = err; + } err = kvm_mips_get_one_ulreg(cs, KVM_REG_MIPS_CP0_ERROREPC, &env->CP0_ErrorEPC); if (err < 0) { -- cgit v1.2.1