linux-kernel - [PATCH for-fixes] MIPS: Loongson64: Do not override watch and ejtag feature

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Date:   Sat,  8 Aug 2020 20:32:27 +0800
From:   Jiaxun Yang <jiaxun.yang@...goat.com>
To:     linux-mips@...r.kernel.org
Cc:     Jiaxun Yang <jiaxun.yang@...goat.com>,
        Huacai Chen <chenhc@...ote.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        linux-kernel@...r.kernel.org
Subject: [PATCH for-fixes] MIPS: Loongson64: Do not override watch and ejtag feature

Do not override ejtag feature to 0 as Loongson 3A1000+ do have ejtag.
For watch, as KVM emulated CPU doesn't have watch feature, we should
not enable it unconditionally.

Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
---
This patch should go into mips-fixes tree as watch feature is blocking
KVM guest boot in some cases.
---
 arch/mips/include/asm/mach-loongson64/cpu-feature-overrides.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/mips/include/asm/mach-loongson64/cpu-feature-overrides.h b/arch/mips/include/asm/mach-loongson64/cpu-feature-overrides.h
index b6e9c99b85a5..eb181224eb4c 100644
--- a/arch/mips/include/asm/mach-loongson64/cpu-feature-overrides.h
+++ b/arch/mips/include/asm/mach-loongson64/cpu-feature-overrides.h
@@ -26,7 +26,6 @@
 #define cpu_has_counter		1
 #define cpu_has_dc_aliases	(PAGE_SIZE < 0x4000)
 #define cpu_has_divec		0
-#define cpu_has_ejtag		0
 #define cpu_has_inclusive_pcaches	1
 #define cpu_has_llsc		1
 #define cpu_has_mcheck		0
@@ -42,7 +41,6 @@
 #define cpu_has_veic		0
 #define cpu_has_vint		0
 #define cpu_has_vtag_icache	0
-#define cpu_has_watch		1
 #define cpu_has_wsbh		1
 #define cpu_has_ic_fills_f_dc	1
 #define cpu_hwrena_impl_bits	0xc0000000
-- 
2.28.0.rc1