kpriv/linux-hardened
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

arm64: KVM: Add access handler for PMINTENSET and PMINTENCLR register

Browse source 
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 <shannon.zhao@linaro.org>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
Shannon Zhao 2015-09-08 14:40:20 +08:00 committed by Marc Zyngier
parent 9feb21ac57
commit 9db52c78cd
2 changed files with 29 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
arch/arm64/include/asm/kvm_host.h
View file

@ -127,6 +127,7 @@ enum vcpu_sysreg {
PMEVTYPER30_EL0 = PMEVTYPER0_EL0 + 30,
PMCCFILTR_EL0, /* Cycle Count Filter Register */
PMCNTENSET_EL0, /* Count Enable Set Register */
PMINTENSET_EL1, /* Interrupt Enable Set Register */
/* 32bit specific registers. Keep them at the end of the range */
DACR32_EL2, /* Domain Access Control Register */

32
arch/arm64/kvm/sys_regs.c
View file

@ -626,6 +626,30 @@ 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) {
u64 val = p->regval & mask;
if (r->Op2 & 0x1)
/* accessing PMINTENSET_EL1 */
vcpu_sys_reg(vcpu, PMINTENSET_EL1) |= val;
else
/* accessing PMINTENCLR_EL1 */
vcpu_sys_reg(vcpu, PMINTENSET_EL1) &= ~val;
} 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 */ \
@ -784,10 +808,10 @@ 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),
@ -1182,8 +1206,8 @@ 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 },