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From: Raghavendra Rao Ananta <rananta@google.com>
To: Oliver Upton <oliver.upton@linux.dev>, Marc Zyngier <maz@kernel.org>
Cc: Alexandru Elisei <alexandru.elisei@arm.com>,
	James Morse <james.morse@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Zenghui Yu <yuzenghui@huawei.com>,
	Shaoqin Huang <shahuang@redhat.com>,
	Jing Zhang <jingzhangos@google.com>,
	Reiji Watanabe <reijiw@google.com>,
	Colton Lewis <coltonlewis@google.com>,
	Raghavendra Rao Anata <rananta@google.com>,
	linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev,
	linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Subject: [PATCH v6 04/11] KVM: arm64: PMU: Don't define the sysreg reset() for PM{USERENR,CCFILTR}_EL0
Date: Tue, 26 Sep 2023 23:40:01 +0000	[thread overview]
Message-ID: <20230926234008.2348607-5-rananta@google.com> (raw)
In-Reply-To: <20230926234008.2348607-1-rananta@google.com>

From: Reiji Watanabe <reijiw@google.com>

The default reset function for PMU registers (defined by PMU_SYS_REG)
now simply clears a specified register. Use the default one for
PMUSERENR_EL0 and PMCCFILTR_EL0, as KVM currently clears those
registers on vCPU reset (NOTE: All non-RES0 fields of those
registers have UNKNOWN reset values, and the same fields of
their AArch32 registers have 0 reset values).

No functional change intended.

Signed-off-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Raghavendra Rao Ananta <rananta@google.com>
---
 arch/arm64/kvm/sys_regs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index ffd123fae30d6..66b9e1de54230 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -2180,7 +2180,7 @@ static const struct sys_reg_desc sys_reg_descs[] = {
 	 * in 32bit mode. Here we choose to reset it as zero for consistency.
 	 */
 	{ PMU_SYS_REG(PMUSERENR_EL0), .access = access_pmuserenr,
-	  .reset = reset_val, .reg = PMUSERENR_EL0, .val = 0 },
+	  .reg = PMUSERENR_EL0, },
 	{ PMU_SYS_REG(PMOVSSET_EL0),
 	  .access = access_pmovs, .reg = PMOVSSET_EL0 },
 
@@ -2338,7 +2338,7 @@ static const struct sys_reg_desc sys_reg_descs[] = {
 	 * in 32bit mode. Here we choose to reset it as zero for consistency.
 	 */
 	{ PMU_SYS_REG(PMCCFILTR_EL0), .access = access_pmu_evtyper,
-	  .reset = reset_val, .reg = PMCCFILTR_EL0, .val = 0 },
+	  .reg = PMCCFILTR_EL0, },
 
 	EL2_REG(VPIDR_EL2, access_rw, reset_unknown, 0),
 	EL2_REG(VMPIDR_EL2, access_rw, reset_unknown, 0),
-- 
2.42.0.582.g8ccd20d70d-goog


  parent reply	other threads:[~2023-09-27  0:22 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-09-26 23:39 [PATCH v6 00/11] KVM: arm64: PMU: Allow userspace to limit the number of PMCs on vCPU Raghavendra Rao Ananta
2023-09-26 23:39 ` [PATCH v6 01/11] KVM: arm64: PMU: Introduce helpers to set the guest's PMU Raghavendra Rao Ananta
2023-09-26 23:39 ` [PATCH v6 02/11] KVM: arm64: PMU: Set the default PMU for the guest on vCPU reset Raghavendra Rao Ananta
2023-09-27  8:02   ` Oliver Upton
2023-09-27 17:36     ` Raghavendra Rao Ananta
2023-09-26 23:40 ` [PATCH v6 03/11] KVM: arm64: PMU: Clear PM{C,I}NTEN{SET,CLR} and PMOVS{SET,CLR} " Raghavendra Rao Ananta
2023-09-26 23:40 ` Raghavendra Rao Ananta [this message]
2023-09-26 23:40 ` [PATCH v6 05/11] KVM: arm64: PMU: Add a helper to read a vCPU's PMCR_EL0 Raghavendra Rao Ananta
2023-09-26 23:40 ` [PATCH v6 06/11] KVM: arm64: PMU: Set PMCR_EL0.N for vCPU based on the associated PMU Raghavendra Rao Ananta
2023-09-26 23:40 ` [PATCH v6 07/11] KVM: arm64: PMU: Allow userspace to limit PMCR_EL0.N for the guest Raghavendra Rao Ananta
2023-09-28 23:08   ` kernel test robot
2023-09-26 23:40 ` [PATCH v6 08/11] tools: Import arm_pmuv3.h Raghavendra Rao Ananta
2023-09-26 23:40 ` [PATCH v6 09/11] KVM: selftests: aarch64: Introduce vpmu_counter_access test Raghavendra Rao Ananta
2023-09-26 23:40 ` [PATCH v6 10/11] KVM: selftests: aarch64: vPMU register test for implemented counters Raghavendra Rao Ananta
2023-09-26 23:40 ` [PATCH v6 11/11] KVM: selftests: aarch64: vPMU register test for unimplemented counters Raghavendra Rao Ananta

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