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From: Inochi Amaoto <inochiama@gmail.com>
To: Paul Walmsley <pjw@kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Alexandre Ghiti <alex@ghiti.fr>, Anup Patel <anup@brainfault.org>,
	Atish Patra <atish.patra@linux.dev>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Shuah Khan <shuah@kernel.org>, Thomas Huth <thuth@redhat.com>,
	Sergey Matyukevich <geomatsi@gmail.com>,
	Inochi Amaoto <inochiama@gmail.com>,
	Andy Chiu <andybnac@gmail.com>, Deepak Gupta <debug@rivosinc.com>
Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
	kvm@vger.kernel.org, kvm-riscv@lists.infradead.org,
	linux-kselftest@vger.kernel.org, Yixun Lan <dlan@gentoo.org>,
	Longbin Li <looong.bin@gmail.com>
Subject: [PATCH v4 6/8] RISC-V: KVM: Delegate SPELP bit to VS/VU mode if landing pad is enabled.
Date: Wed,  1 Jul 2026 10:07:43 +0800	[thread overview]
Message-ID: <20260701020746.170157-7-inochiama@gmail.com> (raw)
In-Reply-To: <20260701020746.170157-1-inochiama@gmail.com>

Delegate the newly added SPELP bit from Zicfilp extension to VS/VU mode
if it enables landing pad support.

Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
---
 arch/riscv/kvm/vcpu_exit.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/riscv/kvm/vcpu_exit.c b/arch/riscv/kvm/vcpu_exit.c
index 12eebeabdf14..61305da5256d 100644
--- a/arch/riscv/kvm/vcpu_exit.c
+++ b/arch/riscv/kvm/vcpu_exit.c
@@ -154,6 +154,12 @@ void kvm_riscv_vcpu_trap_redirect(struct kvm_vcpu *vcpu,
 	/* Clear Guest SSTATUS.SIE bit */
 	vsstatus &= ~SR_SIE;
 
+	/* Change Guest SSTATUS.SPELP bit */
+	if (vcpu->arch.cfg.henvcfg & ENVCFG_LPE) {
+		vsstatus &= ~SR_SPELP;
+		vsstatus |= vcpu->arch.guest_context.sstatus & SR_SPELP;
+	}
+
 	/* Update Guest SSTATUS */
 	ncsr_write(CSR_VSSTATUS, vsstatus);
 
-- 
2.55.0


WARNING: multiple messages have this Message-ID (diff)
From: Inochi Amaoto <inochiama@gmail.com>
To: Paul Walmsley <pjw@kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Alexandre Ghiti <alex@ghiti.fr>, Anup Patel <anup@brainfault.org>,
	Atish Patra <atish.patra@linux.dev>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Shuah Khan <shuah@kernel.org>, Thomas Huth <thuth@redhat.com>,
	Sergey Matyukevich <geomatsi@gmail.com>,
	Inochi Amaoto <inochiama@gmail.com>,
	Andy Chiu <andybnac@gmail.com>, Deepak Gupta <debug@rivosinc.com>
Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
	kvm@vger.kernel.org, kvm-riscv@lists.infradead.org,
	linux-kselftest@vger.kernel.org, Yixun Lan <dlan@gentoo.org>,
	Longbin Li <looong.bin@gmail.com>
Subject: [PATCH v4 6/8] RISC-V: KVM: Delegate SPELP bit to VS/VU mode if landing pad is enabled.
Date: Wed,  1 Jul 2026 10:07:43 +0800	[thread overview]
Message-ID: <20260701020746.170157-7-inochiama@gmail.com> (raw)
In-Reply-To: <20260701020746.170157-1-inochiama@gmail.com>

Delegate the newly added SPELP bit from Zicfilp extension to VS/VU mode
if it enables landing pad support.

Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
---
 arch/riscv/kvm/vcpu_exit.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/riscv/kvm/vcpu_exit.c b/arch/riscv/kvm/vcpu_exit.c
index 12eebeabdf14..61305da5256d 100644
--- a/arch/riscv/kvm/vcpu_exit.c
+++ b/arch/riscv/kvm/vcpu_exit.c
@@ -154,6 +154,12 @@ void kvm_riscv_vcpu_trap_redirect(struct kvm_vcpu *vcpu,
 	/* Clear Guest SSTATUS.SIE bit */
 	vsstatus &= ~SR_SIE;
 
+	/* Change Guest SSTATUS.SPELP bit */
+	if (vcpu->arch.cfg.henvcfg & ENVCFG_LPE) {
+		vsstatus &= ~SR_SPELP;
+		vsstatus |= vcpu->arch.guest_context.sstatus & SR_SPELP;
+	}
+
 	/* Update Guest SSTATUS */
 	ncsr_write(CSR_VSSTATUS, vsstatus);
 
-- 
2.55.0


_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

WARNING: multiple messages have this Message-ID (diff)
From: Inochi Amaoto <inochiama@gmail.com>
To: Paul Walmsley <pjw@kernel.org>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	Alexandre Ghiti <alex@ghiti.fr>, Anup Patel <anup@brainfault.org>,
	Atish Patra <atish.patra@linux.dev>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Shuah Khan <shuah@kernel.org>, Thomas Huth <thuth@redhat.com>,
	Sergey Matyukevich <geomatsi@gmail.com>,
	Inochi Amaoto <inochiama@gmail.com>,
	Andy Chiu <andybnac@gmail.com>, Deepak Gupta <debug@rivosinc.com>
Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
	kvm@vger.kernel.org, kvm-riscv@lists.infradead.org,
	linux-kselftest@vger.kernel.org, Yixun Lan <dlan@gentoo.org>,
	Longbin Li <looong.bin@gmail.com>
Subject: [PATCH v4 6/8] RISC-V: KVM: Delegate SPELP bit to VS/VU mode if landing pad is enabled.
Date: Wed,  1 Jul 2026 10:07:43 +0800	[thread overview]
Message-ID: <20260701020746.170157-7-inochiama@gmail.com> (raw)
In-Reply-To: <20260701020746.170157-1-inochiama@gmail.com>

Delegate the newly added SPELP bit from Zicfilp extension to VS/VU mode
if it enables landing pad support.

Signed-off-by: Inochi Amaoto <inochiama@gmail.com>
---
 arch/riscv/kvm/vcpu_exit.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/riscv/kvm/vcpu_exit.c b/arch/riscv/kvm/vcpu_exit.c
index 12eebeabdf14..61305da5256d 100644
--- a/arch/riscv/kvm/vcpu_exit.c
+++ b/arch/riscv/kvm/vcpu_exit.c
@@ -154,6 +154,12 @@ void kvm_riscv_vcpu_trap_redirect(struct kvm_vcpu *vcpu,
 	/* Clear Guest SSTATUS.SIE bit */
 	vsstatus &= ~SR_SIE;
 
+	/* Change Guest SSTATUS.SPELP bit */
+	if (vcpu->arch.cfg.henvcfg & ENVCFG_LPE) {
+		vsstatus &= ~SR_SPELP;
+		vsstatus |= vcpu->arch.guest_context.sstatus & SR_SPELP;
+	}
+
 	/* Update Guest SSTATUS */
 	ncsr_write(CSR_VSSTATUS, vsstatus);
 
-- 
2.55.0


-- 
kvm-riscv mailing list
kvm-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kvm-riscv

  parent reply	other threads:[~2026-07-01  2:08 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-01  2:07 [PATCH v4 0/8] RISC-V: KVM: Add Svadu/Zicfiss/Zicfilp FWFT support Inochi Amaoto
2026-07-01  2:07 ` Inochi Amaoto
2026-07-01  2:07 ` Inochi Amaoto
2026-07-01  2:07 ` [PATCH v4 1/8] RISC-V: KVM: Add support for Svadu FWFT features Inochi Amaoto
2026-07-01  2:07   ` Inochi Amaoto
2026-07-01  2:07   ` Inochi Amaoto
2026-07-01  2:30   ` sashiko-bot
2026-07-01  2:07 ` [PATCH v4 2/8] KVM: riscv: selftests: add Svadu FWFT extension to get-reg-list test Inochi Amaoto
2026-07-01  2:07   ` Inochi Amaoto
2026-07-01  2:07   ` Inochi Amaoto
2026-07-01  2:07 ` [PATCH v4 3/8] RISC-V: KVM: Allow Zicfiss/Zicfilp extensions for Guest/VM Inochi Amaoto
2026-07-01  2:07   ` Inochi Amaoto
2026-07-01  2:07   ` Inochi Amaoto
2026-07-01  2:07 ` [PATCH v4 4/8] RISC-V: KVM: Add ssp context save/restore Inochi Amaoto
2026-07-01  2:07   ` Inochi Amaoto
2026-07-01  2:07   ` Inochi Amaoto
2026-07-01  2:28   ` sashiko-bot
2026-07-01  2:07 ` [PATCH v4 5/8] RISC-V: KVM: Handle software-check exits for VCPU Inochi Amaoto
2026-07-01  2:07   ` Inochi Amaoto
2026-07-01  2:07   ` Inochi Amaoto
2026-07-01  2:31   ` sashiko-bot
2026-07-01  2:07 ` Inochi Amaoto [this message]
2026-07-01  2:07   ` [PATCH v4 6/8] RISC-V: KVM: Delegate SPELP bit to VS/VU mode if landing pad is enabled Inochi Amaoto
2026-07-01  2:07   ` Inochi Amaoto
2026-07-01  2:20   ` sashiko-bot
2026-07-01  2:07 ` [PATCH v4 7/8] RISC-V: KVM: Add support for control-flow integrity FWFT features Inochi Amaoto
2026-07-01  2:07   ` Inochi Amaoto
2026-07-01  2:07   ` Inochi Amaoto
2026-07-01  2:33   ` sashiko-bot
2026-07-01  2:07 ` [PATCH v4 8/8] KVM: riscv: selftests: add Zicfiss/Zicfilp extension to get-reg-list test Inochi Amaoto
2026-07-01  2:07   ` Inochi Amaoto
2026-07-01  2:07   ` Inochi Amaoto
2026-07-01  2:23   ` sashiko-bot

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