From: Fuad Tabba <tabba@google.com>
To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org
Cc: maz@kernel.org, will@kernel.org, qperret@google.com,
tabba@google.com, seanjc@google.com, alexandru.elisei@arm.com,
catalin.marinas@arm.com, philmd@linaro.org, james.morse@arm.com,
suzuki.poulose@arm.com, oliver.upton@linux.dev,
mark.rutland@arm.com, broonie@kernel.org, joey.gouly@arm.com,
rananta@google.com, yuzenghui@huawei.com
Subject: [PATCH v3 01/11] KVM: arm64: Reintroduce __sve_save_state
Date: Tue, 28 May 2024 13:59:04 +0100 [thread overview]
Message-ID: <20240528125914.277057-2-tabba@google.com> (raw)
In-Reply-To: <20240528125914.277057-1-tabba@google.com>
Now that the hypervisor is handling the host sve state in
protected mode, it needs to be able to save it.
This reverts commit e66425fc9ba3 ("KVM: arm64: Remove unused
__sve_save_state").
Signed-off-by: Fuad Tabba <tabba@google.com>
---
arch/arm64/include/asm/kvm_hyp.h | 1 +
arch/arm64/kvm/hyp/fpsimd.S | 6 ++++++
2 files changed, 7 insertions(+)
diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_hyp.h
index 3e80464f8953..2ab23589339a 100644
--- a/arch/arm64/include/asm/kvm_hyp.h
+++ b/arch/arm64/include/asm/kvm_hyp.h
@@ -111,6 +111,7 @@ void __debug_restore_host_buffers_nvhe(struct kvm_vcpu *vcpu);
void __fpsimd_save_state(struct user_fpsimd_state *fp_regs);
void __fpsimd_restore_state(struct user_fpsimd_state *fp_regs);
+void __sve_save_state(void *sve_pffr, u32 *fpsr);
void __sve_restore_state(void *sve_pffr, u32 *fpsr);
u64 __guest_enter(struct kvm_vcpu *vcpu);
diff --git a/arch/arm64/kvm/hyp/fpsimd.S b/arch/arm64/kvm/hyp/fpsimd.S
index 61e6f3ba7b7d..e950875e31ce 100644
--- a/arch/arm64/kvm/hyp/fpsimd.S
+++ b/arch/arm64/kvm/hyp/fpsimd.S
@@ -25,3 +25,9 @@ SYM_FUNC_START(__sve_restore_state)
sve_load 0, x1, x2, 3
ret
SYM_FUNC_END(__sve_restore_state)
+
+SYM_FUNC_START(__sve_save_state)
+ mov x2, #1
+ sve_save 0, x1, x2, 3
+ ret
+SYM_FUNC_END(__sve_save_state)
--
2.45.1.288.g0e0cd299f1-goog
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next prev parent reply other threads:[~2024-05-28 12:59 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-28 12:59 [PATCH v3 00/11] KVM: arm64: Fix handling of host fpsimd/sve state in protected mode Fuad Tabba
2024-05-28 12:59 ` Fuad Tabba [this message]
2024-05-31 12:26 ` [PATCH v3 01/11] KVM: arm64: Reintroduce __sve_save_state Mark Brown
2024-06-03 8:28 ` Fuad Tabba
2024-05-28 12:59 ` [PATCH v3 02/11] KVM: arm64: Abstract set/clear of CPTR_EL2 bits behind helper Fuad Tabba
2024-05-28 12:59 ` [PATCH v3 03/11] KVM: arm64: Specialize handling of host fpsimd state on trap Fuad Tabba
2024-05-31 13:35 ` Mark Brown
2024-05-28 12:59 ` [PATCH v3 04/11] KVM: arm64: Allocate memory mapped at hyp for host sve state in pKVM Fuad Tabba
2024-05-28 12:59 ` [PATCH v3 05/11] KVM: arm64: Eagerly restore host fpsimd/sve " Fuad Tabba
2024-05-31 14:09 ` Mark Brown
2024-06-03 8:37 ` Fuad Tabba
2024-06-03 13:27 ` Mark Brown
2024-06-03 13:48 ` Marc Zyngier
2024-06-03 14:15 ` Mark Brown
2024-06-03 14:31 ` Marc Zyngier
2024-05-28 12:59 ` [PATCH v3 06/11] KVM: arm64: Consolidate initializing the host data's fpsimd_state/sve " Fuad Tabba
2024-05-28 12:59 ` [PATCH v3 07/11] KVM: arm64: Refactor CPACR trap bit setting/clearing to use ELx format Fuad Tabba
2024-05-28 12:59 ` [PATCH v3 08/11] KVM: arm64: Add an isb before restoring guest sve state Fuad Tabba
2024-05-28 12:59 ` [PATCH v3 09/11] KVM: arm64: Do not use sve_cond_update_zcr updating with ZCR_ELx_LEN_MASK Fuad Tabba
2024-05-28 12:59 ` [PATCH v3 10/11] KVM: arm64: Do not perform an isb() if ZCR_EL2 isn't updated Fuad Tabba
2024-05-28 12:59 ` [PATCH v3 11/11] KVM: arm64: Drop sve_cond_update_zcr_vq_* Fuad Tabba
2024-05-30 18:22 ` Oliver Upton
2024-05-30 20:14 ` Oliver Upton
2024-05-31 6:40 ` Fuad Tabba
2024-05-28 13:13 ` [PATCH v3 00/11] KVM: arm64: Fix handling of host fpsimd/sve state in protected mode Fuad Tabba
2024-05-30 18:29 ` Oliver Upton
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