linux-kernel - [PATCH v3 03/15] MIPS: cpu-probe: Mark XBurst CPU as having vtagged caches

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Date:   Sun,  6 Sep 2020 21:29:23 +0200
From:   Paul Cercueil <paul@...pouillou.net>
To:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc:     "Maciej W . Rozycki" <macro@...ux-mips.org>,
        Paul Burton <paulburton@...nel.org>,
        Zhou Yanjie <zhouyanjie@...yeetech.com>, od@...c.me,
        linux-kernel@...r.kernel.org, linux-mips@...r.kernel.org,
        Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH v3 03/15] MIPS: cpu-probe: Mark XBurst CPU as having vtagged caches

XBurst CPUs present in Ingenic SoCs have virtually tagged caches,
according to the <cpu-features-override.h> header.

Add that information to cpu_probe_ingenic().

Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---

Notes:
    v2-v3: No change

 arch/mips/kernel/cpu-probe.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index a18f3611fa5e..a07e66a6e063 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -2125,6 +2125,9 @@ static inline void cpu_probe_ingenic(struct cpuinfo_mips *c, unsigned int cpu)
 	c->options &= ~MIPS_CPU_COUNTER;
 	BUG_ON(!__builtin_constant_p(cpu_has_counter) || cpu_has_counter);
 
+	/* XBurst has virtually tagged icache */
+	c->icache.flags |= MIPS_CACHE_VTAG;
+
 	switch (c->processor_id & PRID_IMP_MASK) {
 
 	/* XBurst®1 with MXU1.0/MXU1.1 SIMD ISA */
-- 
2.28.0