Re: [PATCH v3 2/6] arm64: KVM: Move SPE and trace registers to the sysreg array
flat view
From: Marc Zyngier <maz@kernel.org>
Date: 2023-12-04 09:29:27
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On Thu, 19 Oct 2023 17:55:00 +0100, James Clark [off-list ref] wrote:
quoted hunk ↗ jump to hunk
pmscr_el1 and trfcr_el1 are currently special cased in the host_debug_state struct, but they're just registers after all so give them entries in the sysreg array and refer to them through the host context. Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: James Clark <redacted> --- arch/arm64/include/asm/kvm_host.h | 6 ++-- arch/arm64/include/asm/kvm_hyp.h | 4 +-- arch/arm64/kvm/hyp/nvhe/debug-sr.c | 44 +++++++++++++++--------------- arch/arm64/kvm/hyp/nvhe/switch.c | 4 +-- 4 files changed, 28 insertions(+), 30 deletions(-)diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 4a966c0d7373..7c82927ddaf2 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h@@ -437,6 +437,8 @@ enum vcpu_sysreg { CNTHP_CVAL_EL2, CNTHV_CTL_EL2, CNTHV_CVAL_EL2, + PMSCR_EL1, /* Statistical profiling extension */ + TRFCR_EL1, /* Self-hosted trace filters */
Why this move? Are you also adding guest support for SPE? Until you do, I don't see the need to pollute the guest's sysreg namespace. M. -- Without deviation from the norm, progress is not possible. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel