sync: rvck #264: [Backport] KVM: add 'vlenb' Vector CSR#229
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mainline inclusion from mainline-6.10-rc1 commit 197bd23 category: feature bugzilla: RVCK-Project#263 -------------------------------- 'vlenb', added to riscv_v_ext_state by commit c35f3aa ("RISC-V: vector: export VLENB csr in __sc_riscv_v_state"), isn't being initialized in guest_context. If we export 'vlenb' as a KVM CSR, something we want to do in the next patch, it'll always return 0. Set 'vlenb' to riscv_v_size/32. Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Reviewed-by: Anup Patel <anup@brainfault.org> Signed-off-by: Anup Patel <anup@brainfault.org> Signed-off-by: Wang Yechao <wang.yechao255@zte.com.cn> [sync from rvck.] Signed-off-by: WeiHao Li <cn.liweihao@gmail.com>
mainline inclusion from mainline-6.10-rc1 commit 2fa2903 category: feature bugzilla: RVCK-Project#263 -------------------------------- Userspace requires 'vlenb' to be able to encode it in reg ID. Otherwise it is not possible to retrieve any vector reg since we're returning EINVAL if reg_size isn't vlenb (see kvm_riscv_vcpu_vreg_addr()). Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com> Reviewed-by: Anup Patel <anup@brainfault.org> Signed-off-by: Anup Patel <anup@brainfault.org> Signed-off-by: Wang Yechao <wang.yechao255@zte.com.cn> [sync from rvck.] Signed-off-by: WeiHao Li <cn.liweihao@gmail.com>
mainline inclusion
from mainline-v6.17-rc4
commit 7997662
category: feature
bugzilla: RVCK-Project#263
--------------------------------
The userspace load can put up to 2048 bits into an xlen bit stack
buffer. We want only xlen bits, so check the size beforehand.
Fixes: 2fa290372dfe ("RISC-V: KVM: add 'vlenb' Vector CSR")
Cc: stable@vger.kernel.org
Signed-off-by: Radim Krčmář <rkrcmar@ventanamicro.com>
Reviewed-by: Nutty Liu <liujingqi@lanxincomputing.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Link: https://lore.kernel.org/r/20250805104418.196023-4-rkrcmar@ventanamicro.com
Signed-off-by: Anup Patel <anup@brainfault.org>
Signed-off-by: Wang Yechao <wang.yechao255@zte.com.cn>
[sync from rvck.]
Signed-off-by: WeiHao Li <cn.liweihao@gmail.com>
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开始测试 log: https://github.com/RVCK-Project/rvck-olk/actions/runs/26260896969 参数解析结果
测试完成 详细结果:
Kunit Test Resultkunit test failed
Check Patch Result
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Sync commits from rvck PR 264.
Source PR: RVCK-Project/rvck#264