[PATCH v6 04/11] KVM: arm64: PMU: Don't define the sysreg reset() for PM{USERENR,CCFILTR}_EL0

Raghavendra Rao Ananta rananta at google.com
Tue Sep 26 16:40:01 PDT 2023


From: Reiji Watanabe <reijiw at 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 at google.com>
Signed-off-by: Raghavendra Rao Ananta <rananta at 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




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