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charset="utf-8" Signed-off-by: Naohiko Shimizu --- drivers/clocksource/timer-riscv.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/clocksource/timer-riscv.c b/drivers/clocksource/timer-= riscv.c index 4d7cf338824a..cfc4d83c42c0 100644 --- a/drivers/clocksource/timer-riscv.c +++ b/drivers/clocksource/timer-riscv.c @@ -50,8 +50,9 @@ static int riscv_clock_next_event(unsigned long delta, =20 if (static_branch_likely(&riscv_sstc_available)) { #if defined(CONFIG_32BIT) - csr_write(CSR_STIMECMP, next_tval & 0xFFFFFFFF); + csr_write(CSR_STIMECMP, ULONG_MAX); csr_write(CSR_STIMECMPH, next_tval >> 32); + csr_write(CSR_STIMECMP, next_tval & 0xFFFFFFFF); #else csr_write(CSR_STIMECMP, next_tval); #endif --=20 2.39.5 From nobody Sun Feb 8 09:16:42 2026 Received: from mail-pl1-f174.google.com (mail-pl1-f174.google.com [209.85.214.174]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 754E72F5A01 for ; 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charset="utf-8" Signed-off-by: Naohiko Shimizu --- arch/riscv/kvm/vcpu_timer.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/riscv/kvm/vcpu_timer.c b/arch/riscv/kvm/vcpu_timer.c index 85a7262115e1..f36247e4c783 100644 --- a/arch/riscv/kvm/vcpu_timer.c +++ b/arch/riscv/kvm/vcpu_timer.c @@ -72,8 +72,9 @@ static int kvm_riscv_vcpu_timer_cancel(struct kvm_vcpu_ti= mer *t) static int kvm_riscv_vcpu_update_vstimecmp(struct kvm_vcpu *vcpu, u64 ncyc= les) { #if defined(CONFIG_32BIT) - ncsr_write(CSR_VSTIMECMP, ncycles & 0xFFFFFFFF); + ncsr_write(CSR_VSTIMECMP, ULONG_MAX); ncsr_write(CSR_VSTIMECMPH, ncycles >> 32); + ncsr_write(CSR_VSTIMECMP, (u32)ncycles); #else ncsr_write(CSR_VSTIMECMP, ncycles); #endif @@ -307,8 +308,9 @@ void kvm_riscv_vcpu_timer_restore(struct kvm_vcpu *vcpu) return; =20 #if defined(CONFIG_32BIT) - ncsr_write(CSR_VSTIMECMP, (u32)t->next_cycles); + ncsr_write(CSR_VSTIMECMP, ULONG_MAX); ncsr_write(CSR_VSTIMECMPH, (u32)(t->next_cycles >> 32)); + ncsr_write(CSR_VSTIMECMP, (u32)(t->next_cycles)); 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[123.48.16.240]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2a2f3d4cbdasm403124315ad.65.2026.01.03.01.46.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 03 Jan 2026 01:46:17 -0800 (PST) From: Naohiko Shimizu To: pjw@kernel.org, palmer@dabbelt.com, aou@eecs.berkeley.edu Cc: alex@ghiti.fr, anup@brainfault.org, atish.patra@linux.dev, daniel.lezcano@linaro.org, tglx@linutronix.de, nick.hu@sifive.com, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org, Naohiko Shimizu Subject: [PATCH 3/3] riscv: suspend: Fix stimecmp update hazard on RV32 Date: Sat, 3 Jan 2026 18:45:01 +0900 Message-Id: <20260103094501.5625-4-naohiko.shimizu@gmail.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20260103094501.5625-1-naohiko.shimizu@gmail.com> References: <20260103094501.5625-1-naohiko.shimizu@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Signed-off-by: Naohiko Shimizu --- arch/riscv/kernel/suspend.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/riscv/kernel/suspend.c b/arch/riscv/kernel/suspend.c index 24b3f57d467f..aff93090c4ef 100644 --- a/arch/riscv/kernel/suspend.c +++ b/arch/riscv/kernel/suspend.c @@ -51,10 +51,11 @@ void suspend_restore_csrs(struct suspend_context *conte= xt) =20 #ifdef CONFIG_MMU if (riscv_has_extension_unlikely(RISCV_ISA_EXT_SSTC)) { - csr_write(CSR_STIMECMP, context->stimecmp); #if __riscv_xlen < 64 + csr_write(CSR_STIMECMP, ULONG_MAX); csr_write(CSR_STIMECMPH, context->stimecmph); #endif + csr_write(CSR_STIMECMP, context->stimecmp); } =20 csr_write(CSR_SATP, context->satp); --=20 2.39.5