linux-kernel - [PATCH v2 06/11] KVM: arm64: Add trap configs for PMSDSFR

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Message-Id: <20250529-james-perf-feat_spe_eft-v2-6-a01a9baad06a@linaro.org>
Date: Thu, 29 May 2025 12:30:27 +0100
From: James Clark <james.clark@...aro.org>
To: Catalin Marinas <catalin.marinas@....com>, 
 Will Deacon <will@...nel.org>, Mark Rutland <mark.rutland@....com>, 
 Jonathan Corbet <corbet@....net>, Marc Zyngier <maz@...nel.org>, 
 Oliver Upton <oliver.upton@...ux.dev>, Joey Gouly <joey.gouly@....com>, 
 Suzuki K Poulose <suzuki.poulose@....com>, 
 Zenghui Yu <yuzenghui@...wei.com>, Peter Zijlstra <peterz@...radead.org>, 
 Ingo Molnar <mingo@...hat.com>, Arnaldo Carvalho de Melo <acme@...nel.org>, 
 Namhyung Kim <namhyung@...nel.org>, 
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>, 
 Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>, 
 Adrian Hunter <adrian.hunter@...el.com>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 linux-perf-users@...r.kernel.org, linux-doc@...r.kernel.org, 
 kvmarm@...ts.linux.dev, James Clark <james.clark@...aro.org>
Subject: [PATCH v2 06/11] KVM: arm64: Add trap configs for PMSDSFR_EL1

SPE data source filtering (SPE_FEAT_FDS) adds a new register
PMSDSFR_EL1, add the trap configs for it.

Signed-off-by: James Clark <james.clark@...aro.org>
---
 arch/arm64/kvm/emulate-nested.c | 1 +
 arch/arm64/kvm/sys_regs.c       | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/arm64/kvm/emulate-nested.c b/arch/arm64/kvm/emulate-nested.c
index 0fcfcc0478f9..05d3e6b93ae9 100644
--- a/arch/arm64/kvm/emulate-nested.c
+++ b/arch/arm64/kvm/emulate-nested.c
@@ -1169,6 +1169,7 @@ static const struct encoding_to_trap_config encoding_to_cgt[] __initconst = {
 	SR_TRAP(SYS_PMSIRR_EL1,		CGT_MDCR_TPMS),
 	SR_TRAP(SYS_PMSLATFR_EL1,	CGT_MDCR_TPMS),
 	SR_TRAP(SYS_PMSNEVFR_EL1,	CGT_MDCR_TPMS),
+	SR_TRAP(SYS_PMSDSFR_EL1,	CGT_MDCR_TPMS),
 	SR_TRAP(SYS_TRFCR_EL1,		CGT_MDCR_TTRF),
 	SR_TRAP(SYS_TRBBASER_EL1,	CGT_MDCR_E2TB),
 	SR_TRAP(SYS_TRBLIMITR_EL1,	CGT_MDCR_E2TB),
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 5dde9285afc8..9f544ac7b5a6 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -2956,6 +2956,7 @@ static const struct sys_reg_desc sys_reg_descs[] = {
 	{ SYS_DESC(SYS_PMBLIMITR_EL1), undef_access },
 	{ SYS_DESC(SYS_PMBPTR_EL1), undef_access },
 	{ SYS_DESC(SYS_PMBSR_EL1), undef_access },
+	{ SYS_DESC(SYS_PMSDSFR_EL1), undef_access },
 	/* PMBIDR_EL1 is not trapped */
 
 	{ PMU_SYS_REG(PMINTENSET_EL1),

-- 
2.34.1