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Date: Wed, 27 May 2020 12:56:29 +1000
From: Gavin Shan <gshan@...hat.com>
To: Mark Rutland <mark.rutland@....com>
Cc: kvmarm@...ts.cs.columbia.edu, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, maz@...nel.org, will@...nel.org,
catalin.marinas@....com, james.morse@....com,
suzuki.poulose@....com, drjones@...hat.com, eric.auger@...hat.com,
aarcange@...hat.com, shan.gavin@...il.com
Subject: Re: [PATCH RFCv2 5/9] kvm/arm64: Replace hsr with esr
Hi Mark,
On 5/26/20 8:45 PM, Mark Rutland wrote:
> On Fri, May 08, 2020 at 01:29:15PM +1000, Gavin Shan wrote:
>> This replace the variable names to make them self-explaining. The
>> tracepoint isn't changed accordingly because they're part of ABI:
>>
>> * @hsr to @esr
>> * @hsr_ec to @ec
>> * Use kvm_vcpu_trap_get_class() helper if possible
>>
>> Signed-off-by: Gavin Shan <gshan@...hat.com>
>
> As with patch 3, I think this cleanup makes sense independent from the
> rest of the series, and I think it'd make sense to bundle all the
> patches renaming hsr -> esr, and send those as a preparatory series.
>
Yes, PATCH[3/4/5] will be posted independently, as part of the
preparatory work, as you suggested.
Thanks,
Gavin
> Thanks,
> Mark.
>
>> ---
>> arch/arm64/kvm/handle_exit.c | 28 ++++++++++++++--------------
>> arch/arm64/kvm/hyp/switch.c | 9 ++++-----
>> arch/arm64/kvm/sys_regs.c | 30 +++++++++++++++---------------
>> 3 files changed, 33 insertions(+), 34 deletions(-)
>>
>> diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c
>> index 00858db82a64..e3b3dcd5b811 100644
>> --- a/arch/arm64/kvm/handle_exit.c
>> +++ b/arch/arm64/kvm/handle_exit.c
>> @@ -123,13 +123,13 @@ static int kvm_handle_wfx(struct kvm_vcpu *vcpu, struct kvm_run *run)
>> */
>> static int kvm_handle_guest_debug(struct kvm_vcpu *vcpu, struct kvm_run *run)
>> {
>> - u32 hsr = kvm_vcpu_get_esr(vcpu);
>> + u32 esr = kvm_vcpu_get_esr(vcpu);
>> int ret = 0;
>>
>> run->exit_reason = KVM_EXIT_DEBUG;
>> - run->debug.arch.hsr = hsr;
>> + run->debug.arch.hsr = esr;
>>
>> - switch (ESR_ELx_EC(hsr)) {
>> + switch (kvm_vcpu_trap_get_class(esr)) {
>> case ESR_ELx_EC_WATCHPT_LOW:
>> run->debug.arch.far = vcpu->arch.fault.far_el2;
>> /* fall through */
>> @@ -139,8 +139,8 @@ static int kvm_handle_guest_debug(struct kvm_vcpu *vcpu, struct kvm_run *run)
>> case ESR_ELx_EC_BRK64:
>> break;
>> default:
>> - kvm_err("%s: un-handled case hsr: %#08x\n",
>> - __func__, (unsigned int) hsr);
>> + kvm_err("%s: un-handled case esr: %#08x\n",
>> + __func__, (unsigned int)esr);
>> ret = -1;
>> break;
>> }
>> @@ -150,10 +150,10 @@ static int kvm_handle_guest_debug(struct kvm_vcpu *vcpu, struct kvm_run *run)
>>
>> static int kvm_handle_unknown_ec(struct kvm_vcpu *vcpu, struct kvm_run *run)
>> {
>> - u32 hsr = kvm_vcpu_get_esr(vcpu);
>> + u32 esr = kvm_vcpu_get_esr(vcpu);
>>
>> - kvm_pr_unimpl("Unknown exception class: hsr: %#08x -- %s\n",
>> - hsr, esr_get_class_string(hsr));
>> + kvm_pr_unimpl("Unknown exception class: esr: %#08x -- %s\n",
>> + esr, esr_get_class_string(esr));
>>
>> kvm_inject_undefined(vcpu);
>> return 1;
>> @@ -230,10 +230,10 @@ static exit_handle_fn arm_exit_handlers[] = {
>>
>> static exit_handle_fn kvm_get_exit_handler(struct kvm_vcpu *vcpu)
>> {
>> - u32 hsr = kvm_vcpu_get_esr(vcpu);
>> - u8 hsr_ec = ESR_ELx_EC(hsr);
>> + u32 esr = kvm_vcpu_get_esr(vcpu);
>> + u8 ec = kvm_vcpu_trap_get_class(esr);
>>
>> - return arm_exit_handlers[hsr_ec];
>> + return arm_exit_handlers[ec];
>> }
>>
>> /*
>> @@ -273,15 +273,15 @@ int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
>> {
>> if (ARM_SERROR_PENDING(exception_index)) {
>> u32 esr = kvm_vcpu_get_esr(vcpu);
>> - u8 hsr_ec = ESR_ELx_EC(esr);
>> + u8 ec = kvm_vcpu_trap_get_class(esr);
>>
>> /*
>> * HVC/SMC already have an adjusted PC, which we need
>> * to correct in order to return to after having
>> * injected the SError.
>> */
>> - if (hsr_ec == ESR_ELx_EC_HVC32 || hsr_ec == ESR_ELx_EC_HVC64 ||
>> - hsr_ec == ESR_ELx_EC_SMC32 || hsr_ec == ESR_ELx_EC_SMC64) {
>> + if (ec == ESR_ELx_EC_HVC32 || ec == ESR_ELx_EC_HVC64 ||
>> + ec == ESR_ELx_EC_SMC32 || ec == ESR_ELx_EC_SMC64) {
>> u32 adj = kvm_vcpu_trap_il_is32bit(esr) ? 4 : 2;
>> *vcpu_pc(vcpu) -= adj;
>> }
>> diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c
>> index 369f22f49f3d..7bf4840bf90e 100644
>> --- a/arch/arm64/kvm/hyp/switch.c
>> +++ b/arch/arm64/kvm/hyp/switch.c
>> @@ -356,8 +356,8 @@ static bool __hyp_text __populate_fault_info(struct kvm_vcpu *vcpu)
>> static bool __hyp_text __hyp_handle_fpsimd(struct kvm_vcpu *vcpu)
>> {
>> u32 esr = kvm_vcpu_get_esr(vcpu);
>> + u8 ec = kvm_vcpu_trap_get_class(esr);
>> bool vhe, sve_guest, sve_host;
>> - u8 hsr_ec;
>>
>> if (!system_supports_fpsimd())
>> return false;
>> @@ -372,14 +372,13 @@ static bool __hyp_text __hyp_handle_fpsimd(struct kvm_vcpu *vcpu)
>> vhe = has_vhe();
>> }
>>
>> - hsr_ec = kvm_vcpu_trap_get_class(esr);
>> - if (hsr_ec != ESR_ELx_EC_FP_ASIMD &&
>> - hsr_ec != ESR_ELx_EC_SVE)
>> + if (ec != ESR_ELx_EC_FP_ASIMD &&
>> + ec != ESR_ELx_EC_SVE)
>> return false;
>>
>> /* Don't handle SVE traps for non-SVE vcpus here: */
>> if (!sve_guest)
>> - if (hsr_ec != ESR_ELx_EC_FP_ASIMD)
>> + if (ec != ESR_ELx_EC_FP_ASIMD)
>> return false;
>>
>> /* Valid trap. Switch the context: */
>> diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
>> index 012fff834a4b..58f81ab519af 100644
>> --- a/arch/arm64/kvm/sys_regs.c
>> +++ b/arch/arm64/kvm/sys_regs.c
>> @@ -2182,10 +2182,10 @@ static void unhandled_cp_access(struct kvm_vcpu *vcpu,
>> struct sys_reg_params *params)
>> {
>> u32 esr = kvm_vcpu_get_esr(vcpu);
>> - u8 hsr_ec = kvm_vcpu_trap_get_class(esr);
>> + u8 ec = kvm_vcpu_trap_get_class(esr);
>> int cp = -1;
>>
>> - switch(hsr_ec) {
>> + switch (ec) {
>> case ESR_ELx_EC_CP15_32:
>> case ESR_ELx_EC_CP15_64:
>> cp = 15;
>> @@ -2216,17 +2216,17 @@ static int kvm_handle_cp_64(struct kvm_vcpu *vcpu,
>> size_t nr_specific)
>> {
>> struct sys_reg_params params;
>> - u32 hsr = kvm_vcpu_get_esr(vcpu);
>> - int Rt = kvm_vcpu_sys_get_rt(hsr);
>> - int Rt2 = (hsr >> 10) & 0x1f;
>> + u32 esr = kvm_vcpu_get_esr(vcpu);
>> + int Rt = kvm_vcpu_sys_get_rt(esr);
>> + int Rt2 = (esr >> 10) & 0x1f;
>>
>> params.is_aarch32 = true;
>> params.is_32bit = false;
>> - params.CRm = (hsr >> 1) & 0xf;
>> - params.is_write = ((hsr & 1) == 0);
>> + params.CRm = (esr >> 1) & 0xf;
>> + params.is_write = ((esr & 1) == 0);
>>
>> params.Op0 = 0;
>> - params.Op1 = (hsr >> 16) & 0xf;
>> + params.Op1 = (esr >> 16) & 0xf;
>> params.Op2 = 0;
>> params.CRn = 0;
>>
>> @@ -2273,18 +2273,18 @@ static int kvm_handle_cp_32(struct kvm_vcpu *vcpu,
>> size_t nr_specific)
>> {
>> struct sys_reg_params params;
>> - u32 hsr = kvm_vcpu_get_esr(vcpu);
>> - int Rt = kvm_vcpu_sys_get_rt(hsr);
>> + u32 esr = kvm_vcpu_get_esr(vcpu);
>> + int Rt = kvm_vcpu_sys_get_rt(esr);
>>
>> params.is_aarch32 = true;
>> params.is_32bit = true;
>> - params.CRm = (hsr >> 1) & 0xf;
>> + params.CRm = (esr >> 1) & 0xf;
>> params.regval = vcpu_get_reg(vcpu, Rt);
>> - params.is_write = ((hsr & 1) == 0);
>> - params.CRn = (hsr >> 10) & 0xf;
>> + params.is_write = ((esr & 1) == 0);
>> + params.CRn = (esr >> 10) & 0xf;
>> params.Op0 = 0;
>> - params.Op1 = (hsr >> 14) & 0x7;
>> - params.Op2 = (hsr >> 17) & 0x7;
>> + params.Op1 = (esr >> 14) & 0x7;
>> + params.Op2 = (esr >> 17) & 0x7;
>>
>> if (!emulate_cp(vcpu, ¶ms, target_specific, nr_specific) ||
>> !emulate_cp(vcpu, ¶ms, global, nr_global)) {
>> --
>> 2.23.0
>>
>
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