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Mon, 06 May 2024 17:24:21 +0800 From: Li Jun To: chenhuacai@kernel.org, kernel@xen0n.name, lvjianmin@loongson.cn, dongbiao@loongson.cn, zhangbaoqi@loongson.cn Cc: lijun01@kylinos.cn, loongarch@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH] LoongArch: Update the flush cache policy Date: Mon, 6 May 2024 17:24:19 +0800 Message-Id: <20240506092419.4109941-1-lijun01@kylinos.cn> X-Mailer: git-send-email 2.34.1 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" fix when LoongArch s3 resume, Can't find image information Signed-off-by: Li Jun Signed-off-by: Baoqi Zhang Signed-off-by: Jianmin Lv Signed-off-by: Biao Dong --- arch/loongarch/mm/cache.c | 24 +++++++++++++++++++++++- 1 file changed, 23 insertions(+), 1 deletion(-) diff --git a/arch/loongarch/mm/cache.c b/arch/loongarch/mm/cache.c index 6be04d36ca07..52872fa0e5d8 100644 --- a/arch/loongarch/mm/cache.c +++ b/arch/loongarch/mm/cache.c @@ -63,6 +63,28 @@ static void flush_cache_leaf(unsigned int leaf) } while (--nr_nodes > 0); } =20 +static void flush_cache_last_level(unsigned int leaf) +{ + u64 addr; + int i, j, nr_nodes, way_size; + struct cache_desc *cdesc =3D current_cpu_data.cache_leaves + leaf; + + nr_nodes =3D loongson_sysconf.nr_nodes; + + addr =3D CSR_DMW1_BASE; + iocsr_write32(0x1, 0x280); + way_size =3D cdesc->sets * cdesc->linesz; + do { + for (i =3D 0; i < (cdesc->ways * 3); i++) { + for (j =3D 0; j < (cdesc->sets); j++) { + *(volatile u32 *)addr; + addr +=3D cdesc->linesz; + } + } + addr +=3D 0x100000000000; + } while (--nr_nodes > 0); +} + asmlinkage __visible void __flush_cache_all(void) { int leaf; @@ -71,7 +93,7 @@ asmlinkage __visible void __flush_cache_all(void) =20 leaf =3D cache_present - 1; if (cache_inclusive(cdesc + leaf)) { - flush_cache_leaf(leaf); + flush_cache_last_level(leaf); return; } =20 --=20 2.34.1