From: Oliver Upton <oliver.upton@linux.dev>
To: kvmarm@lists.linux.dev
Cc: kvm@vger.kernel.org, Marc Zyngier <maz@kernel.org>,
James Morse <james.morse@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>,
Jing Zhang <jingzhangos@google.com>,
Cornelia Huck <cohuck@redhat.com>,
Oliver Upton <oliver.upton@linux.dev>
Subject: [PATCH v11 05/12] KVM: arm64: Bump up the default KVM sanitised debug version to v8p8
Date: Tue, 3 Oct 2023 23:04:01 +0000 [thread overview]
Message-ID: <20231003230408.3405722-6-oliver.upton@linux.dev> (raw)
In-Reply-To: <20231003230408.3405722-1-oliver.upton@linux.dev>
Since ID_AA64DFR0_EL1 and ID_DFR0_EL1 are now writable from userspace,
it is safe to bump up the default KVM sanitised debug version to v8p8.
Signed-off-by: Jing Zhang <jingzhangos@google.com>
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
---
arch/arm64/kvm/sys_regs.c | 11 +++++++----
1 file changed, 7 insertions(+), 4 deletions(-)
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 8fbfe61fe7bc..b342c96e08f4 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -1496,8 +1496,7 @@ static u64 read_sanitised_id_aa64dfr0_el1(struct kvm_vcpu *vcpu,
{
u64 val = read_sanitised_ftr_reg(SYS_ID_AA64DFR0_EL1);
- /* Limit debug to ARMv8.0 */
- val = ID_REG_LIMIT_FIELD_ENUM(val, ID_AA64DFR0_EL1, DebugVer, IMP);
+ val = ID_REG_LIMIT_FIELD_ENUM(val, ID_AA64DFR0_EL1, DebugVer, V8P8);
/*
* Only initialize the PMU version if the vCPU was configured with one.
@@ -1557,6 +1556,8 @@ static u64 read_sanitised_id_dfr0_el1(struct kvm_vcpu *vcpu,
if (kvm_vcpu_has_pmu(vcpu))
val |= SYS_FIELD_PREP(ID_DFR0_EL1, PerfMon, perfmon);
+ val = ID_REG_LIMIT_FIELD_ENUM(val, ID_DFR0_EL1, CopDbg, Debugv8p8);
+
return val;
}
@@ -2013,7 +2014,8 @@ static const struct sys_reg_desc sys_reg_descs[] = {
.set_user = set_id_dfr0_el1,
.visibility = aa32_id_visibility,
.reset = read_sanitised_id_dfr0_el1,
- .val = ID_DFR0_EL1_PerfMon_MASK, },
+ .val = ID_DFR0_EL1_PerfMon_MASK |
+ ID_DFR0_EL1_CopDbg_MASK, },
ID_HIDDEN(ID_AFR0_EL1),
AA32_ID_SANITISED(ID_MMFR0_EL1),
AA32_ID_SANITISED(ID_MMFR1_EL1),
@@ -2062,7 +2064,8 @@ static const struct sys_reg_desc sys_reg_descs[] = {
.get_user = get_id_reg,
.set_user = set_id_aa64dfr0_el1,
.reset = read_sanitised_id_aa64dfr0_el1,
- .val = ID_AA64DFR0_EL1_PMUVer_MASK, },
+ .val = ID_AA64DFR0_EL1_PMUVer_MASK |
+ ID_AA64DFR0_EL1_DebugVer_MASK, },
ID_SANITISED(ID_AA64DFR1_EL1),
ID_UNALLOCATED(5,2),
ID_UNALLOCATED(5,3),
--
2.42.0.609.gbb76f46606-goog
next prev parent reply other threads:[~2023-10-03 23:04 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-03 23:03 [PATCH v11 00/12] KVM: arm64: Enable 'writable' ID registers Oliver Upton
2023-10-03 23:03 ` [PATCH v11 01/12] KVM: arm64: Allow userspace to get the writable masks for feature " Oliver Upton
2023-10-03 23:03 ` [PATCH v11 02/12] KVM: arm64: Document KVM_ARM_GET_REG_WRITABLE_MASKS Oliver Upton
2023-10-03 23:03 ` [PATCH v11 03/12] KVM: arm64: Use guest ID register values for the sake of emulation Oliver Upton
2023-10-03 23:04 ` [PATCH v11 04/12] KVM: arm64: Reject attempts to set invalid debug arch version Oliver Upton
2023-10-03 23:04 ` Oliver Upton [this message]
2023-10-04 8:57 ` [PATCH v11 05/12] KVM: arm64: Bump up the default KVM sanitised debug version to v8p8 Marc Zyngier
2023-10-04 17:08 ` Oliver Upton
2023-10-04 17:46 ` Marc Zyngier
2023-10-03 23:04 ` [PATCH v11 06/12] KVM: arm64: Allow userspace to change ID_AA64ISAR{0-2}_EL1 Oliver Upton
2023-10-03 23:04 ` [PATCH v11 07/12] KVM: arm64: Allow userspace to change ID_AA64MMFR{0-2}_EL1 Oliver Upton
2023-10-03 23:04 ` [PATCH v11 08/12] KVM: arm64: Allow userspace to change ID_AA64PFR0_EL1 Oliver Upton
2023-10-03 23:04 ` [PATCH v11 09/12] KVM: arm64: Allow userspace to change ID_AA64ZFR0_EL1 Oliver Upton
2023-10-03 23:04 ` [PATCH v11 10/12] KVM: arm64: Document vCPU feature selection UAPIs Oliver Upton
2023-10-04 9:36 ` Marc Zyngier
2023-10-04 16:52 ` Oliver Upton
2023-10-04 17:48 ` Marc Zyngier
2023-10-03 23:04 ` [PATCH v11 11/12] KVM: arm64: selftests: Import automatic generation of sysreg defs Oliver Upton
2023-10-03 23:04 ` [PATCH v11 12/12] KVM: arm64: selftests: Test for setting ID register from usersapce Oliver Upton
2023-10-04 9:40 ` [PATCH v11 00/12] KVM: arm64: Enable 'writable' ID registers Marc Zyngier
2023-10-04 16:53 ` Oliver Upton
2023-10-04 17:46 ` Oliver Upton
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