[PATCH v10 11/21] KVM: ARM64: Add access handler for PMINTENSET and PMINTENCLR register
From: Shannon Zhao <hidden>
Date: 2016-01-27 03:51:39
Also in:
kvm, kvmarm
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
From: Shannon Zhao <redacted> Since the reset value of PMINTENSET and PMINTENCLR is UNKNOWN, use reset_unknown for its reset handler. Add a handler to emulate writing PMINTENSET or PMINTENCLR register. Signed-off-by: Shannon Zhao <redacted> --- arch/arm64/kvm/sys_regs.c | 32 ++++++++++++++++++++++++++++---- 1 file changed, 28 insertions(+), 4 deletions(-)
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index d43a9a4..41d4bcd 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c@@ -630,6 +630,30 @@ static bool access_pmcnten(struct kvm_vcpu *vcpu, struct sys_reg_params *p, return true; } +static bool access_pminten(struct kvm_vcpu *vcpu, struct sys_reg_params *p, + const struct sys_reg_desc *r) +{ + u64 mask = kvm_pmu_valid_counter_mask(vcpu); + + if (!kvm_arm_pmu_v3_ready(vcpu)) + return trap_raz_wi(vcpu, p, r); + + if (p->is_write) { + if (r->Op2 & 0x1) + /* accessing PMINTENSET_EL1 */ + vcpu_sys_reg(vcpu, PMINTENSET_EL1) |= (p->regval + & mask); + else + /* accessing PMINTENCLR_EL1 */ + vcpu_sys_reg(vcpu, PMINTENSET_EL1) &= ~(p->regval + & mask); + } else { + p->regval = vcpu_sys_reg(vcpu, PMINTENSET_EL1) & mask; + } + + return true; +} + /* Silly macro to expand the DBG{BCR,BVR,WVR,WCR}n_EL1 registers in one go */ #define DBG_BCR_BVR_WCR_WVR_EL1(n) \ /* DBGBVRn_EL1 */ \
@@ -788,10 +812,10 @@ static const struct sys_reg_desc sys_reg_descs[] = { /* PMINTENSET_EL1 */ { Op0(0b11), Op1(0b000), CRn(0b1001), CRm(0b1110), Op2(0b001), - trap_raz_wi }, + access_pminten, reset_unknown, PMINTENSET_EL1 }, /* PMINTENCLR_EL1 */ { Op0(0b11), Op1(0b000), CRn(0b1001), CRm(0b1110), Op2(0b010), - trap_raz_wi }, + access_pminten, NULL, PMINTENSET_EL1 }, /* MAIR_EL1 */ { Op0(0b11), Op1(0b000), CRn(0b1010), CRm(0b0010), Op2(0b000),
@@ -1186,8 +1210,8 @@ static const struct sys_reg_desc cp15_regs[] = { { Op1( 0), CRn( 9), CRm(13), Op2( 1), access_pmu_evtyper }, { Op1( 0), CRn( 9), CRm(13), Op2( 2), access_pmu_evcntr }, { Op1( 0), CRn( 9), CRm(14), Op2( 0), trap_raz_wi }, - { Op1( 0), CRn( 9), CRm(14), Op2( 1), trap_raz_wi }, - { Op1( 0), CRn( 9), CRm(14), Op2( 2), trap_raz_wi }, + { Op1( 0), CRn( 9), CRm(14), Op2( 1), access_pminten }, + { Op1( 0), CRn( 9), CRm(14), Op2( 2), access_pminten }, { Op1( 0), CRn(10), CRm( 2), Op2( 0), access_vm_reg, NULL, c10_PRRR }, { Op1( 0), CRn(10), CRm( 2), Op2( 1), access_vm_reg, NULL, c10_NMRR },
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2.0.4