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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 v5 04/12] KVM: arm64: PMU: Don't define the sysreg reset() for PM{USERENR,CCFILTR}_EL0
Date: Thu, 17 Aug 2023 00:30:21 +0000	[thread overview]
Message-ID: <20230817003029.3073210-5-rananta@google.com> (raw)
In-Reply-To: <20230817003029.3073210-1-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 9d3d44d165eed..39e9248c935e7 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -2178,7 +2178,7 @@ 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 },
 
@@ -2336,7 +2336,7 @@ 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),
-- 
2.41.0.694.ge786442a9b-goog


  parent reply	other threads:[~2023-08-17  0:31 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-08-17  0:30 [PATCH v5 00/12] KVM: arm64: PMU: Allow userspace to limit the number of PMCs on vCPU Raghavendra Rao Ananta
2023-08-17  0:30 ` [PATCH v5 01/12] KVM: arm64: PMU: Introduce a helper to set the guest's PMU Raghavendra Rao Ananta
2023-09-15 19:22   ` Oliver Upton
2023-09-18 17:24     ` Raghavendra Rao Ananta
2023-08-17  0:30 ` [PATCH v5 02/12] KVM: arm64: PMU: Set the default PMU for the guest on vCPU reset Raghavendra Rao Ananta
2023-08-17  5:03   ` kernel test robot
2023-08-17  7:54   ` kernel test robot
2023-09-15 19:33   ` Oliver Upton
2023-09-18 16:41     ` Raghavendra Rao Ananta
2023-09-18 16:47       ` Oliver Upton
2023-09-18 16:58         ` Raghavendra Rao Ananta
2023-08-17  0:30 ` [PATCH v5 03/12] KVM: arm64: PMU: Clear PM{C,I}NTEN{SET,CLR} and PMOVS{SET,CLR} " Raghavendra Rao Ananta
2023-08-17  0:30 ` Raghavendra Rao Ananta [this message]
2023-08-17  0:30 ` [PATCH v5 05/12] KVM: arm64: PMU: Simplify extracting PMCR_EL0.N Raghavendra Rao Ananta
2023-08-17  6:38   ` kernel test robot
2023-09-15 19:56   ` Oliver Upton
2023-09-18 16:53     ` Raghavendra Rao Ananta
2023-08-17  0:30 ` [PATCH v5 06/12] KVM: arm64: PMU: Add a helper to read a vCPU's PMCR_EL0 Raghavendra Rao Ananta
2023-08-17  0:30 ` [PATCH v5 07/12] KVM: arm64: PMU: Set PMCR_EL0.N for vCPU based on the associated PMU Raghavendra Rao Ananta
2023-08-17  0:30 ` [PATCH v5 08/12] KVM: arm64: PMU: Allow userspace to limit PMCR_EL0.N for the guest Raghavendra Rao Ananta
2023-08-21 12:12   ` Shaoqin Huang
2023-08-21 23:28     ` Raghavendra Rao Ananta
2023-08-22  3:26       ` Shaoqin Huang
2023-09-15 20:36         ` Oliver Upton
2023-09-18 17:02           ` Raghavendra Rao Ananta
2023-08-22 10:05   ` Shaoqin Huang
2023-08-23 16:06     ` Raghavendra Rao Ananta
2023-08-24  8:50       ` Shaoqin Huang
2023-08-25 22:34         ` Raghavendra Rao Ananta
2023-08-26  2:40           ` Shaoqin Huang
2023-09-15 20:53   ` Oliver Upton
2023-09-15 21:54     ` Oliver Upton
2023-09-18 17:11       ` Raghavendra Rao Ananta
2023-09-18 17:22         ` Raghavendra Rao Ananta
2023-09-18 17:07     ` Raghavendra Rao Ananta
2023-08-17  0:30 ` [PATCH v5 09/12] tools: Import arm_pmuv3.h Raghavendra Rao Ananta
2023-08-17  0:30 ` [PATCH v5 10/12] KVM: selftests: aarch64: Introduce vpmu_counter_access test Raghavendra Rao Ananta
2023-09-15 21:00   ` Oliver Upton
2023-09-18 17:20     ` Raghavendra Rao Ananta
2023-08-17  0:30 ` [PATCH v5 11/12] KVM: selftests: aarch64: vPMU register test for implemented counters Raghavendra Rao Ananta
2023-08-17  0:30 ` [PATCH v5 12/12] KVM: selftests: aarch64: vPMU register test for unimplemented counters Raghavendra Rao Ananta

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