arm64: Add support for TSV110 Spectre-BHB mitigation

[ Upstream commit e3baa5d ]

The TSV110 processor is vulnerable to the Spectre-BHB (Branch History
Buffer) attack, which can be exploited to leak information through
branch prediction side channels. This commit adds the MIDR of TSV110
to the list for software mitigation.

Signed-off-by: Jinqian Yang <yangjinqian1@huawei.com>
Reviewed-by: Zenghui Yu <zenghui.yu@linux.dev>
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

Author: Jinqian Yang

arch/arm64/kernel/proton-pack.c

@@ -887,6 +887,7 @@ static u8 spectre_bhb_loop_affected(void)
 		MIDR_ALL_VERSIONS(MIDR_CORTEX_X2),
 		MIDR_ALL_VERSIONS(MIDR_NEOVERSE_N2),
 		MIDR_ALL_VERSIONS(MIDR_NEOVERSE_V1),
+		MIDR_ALL_VERSIONS(MIDR_HISI_TSV110),
 		{},
 	};
 	static const struct midr_range spectre_bhb_k24_list[] = {