+++ /dev/null
-From 05ab803d1ad8ac505ade77c6bd3f86b1b4ea0dc4 Mon Sep 17 00:00:00 2001
-From: Samuel Holland <samuel.holland@sifive.com>
-Date: Tue, 27 Feb 2024 22:55:35 -0800
-Subject: riscv: Save/restore envcfg CSR during CPU suspend
-
-From: Samuel Holland <samuel.holland@sifive.com>
-
-commit 05ab803d1ad8ac505ade77c6bd3f86b1b4ea0dc4 upstream.
-
-The value of the [ms]envcfg CSR is lost when entering a nonretentive
-idle state, so the CSR must be rewritten when resuming the CPU.
-
-Cc: <stable@vger.kernel.org> # v6.7+
-Fixes: 43c16d51a19b ("RISC-V: Enable cbo.zero in usermode")
-Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
-Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
-Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
-Link: https://lore.kernel.org/r/20240228065559.3434837-4-samuel.holland@sifive.com
-Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
----
- arch/riscv/include/asm/suspend.h | 1 +
- arch/riscv/kernel/suspend.c | 4 ++++
- 2 files changed, 5 insertions(+)
-
---- a/arch/riscv/include/asm/suspend.h
-+++ b/arch/riscv/include/asm/suspend.h
-@@ -14,6 +14,7 @@ struct suspend_context {
- struct pt_regs regs;
- /* Saved and restored by high-level functions */
- unsigned long scratch;
-+ unsigned long envcfg;
- unsigned long tvec;
- unsigned long ie;
- #ifdef CONFIG_MMU
---- a/arch/riscv/kernel/suspend.c
-+++ b/arch/riscv/kernel/suspend.c
-@@ -11,6 +11,8 @@
- void suspend_save_csrs(struct suspend_context *context)
- {
- context->scratch = csr_read(CSR_SCRATCH);
-+ if (riscv_cpu_has_extension_unlikely(smp_processor_id(), RISCV_ISA_EXT_XLINUXENVCFG))
-+ context->envcfg = csr_read(CSR_ENVCFG);
- context->tvec = csr_read(CSR_TVEC);
- context->ie = csr_read(CSR_IE);
-
-@@ -32,6 +34,8 @@ void suspend_save_csrs(struct suspend_co
- void suspend_restore_csrs(struct suspend_context *context)
- {
- csr_write(CSR_SCRATCH, context->scratch);
-+ if (riscv_cpu_has_extension_unlikely(smp_processor_id(), RISCV_ISA_EXT_XLINUXENVCFG))
-+ csr_write(CSR_ENVCFG, context->envcfg);
- csr_write(CSR_TVEC, context->tvec);
- csr_write(CSR_IE, context->ie);
-