From: Min Fanlei <minfanlei@wxiat.com> Sunway inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I56WV8 -------------------------------- We distinguish the running mode of emulator from guest by EMUL_FLAG according to the related changes of qemu. Signed-off-by: Min Fanlei <minfanlei@wxiat.com> Signed-off-by: Gu Zitao <guzitao@wxiat.com> Acked-by: Xie XiuQi <xiexiuqi@huawei.com> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> --- arch/sw_64/chip/chip3/chip.c | 2 +- arch/sw_64/include/asm/hw_init.h | 3 +++ arch/sw_64/kernel/setup.c | 14 +++++++++++--- 3 files changed, 15 insertions(+), 4 deletions(-) diff --git a/arch/sw_64/chip/chip3/chip.c b/arch/sw_64/chip/chip3/chip.c index adb4d325fc91..f4b17cfa1127 100644 --- a/arch/sw_64/chip/chip3/chip.c +++ b/arch/sw_64/chip/chip3/chip.c @@ -116,7 +116,7 @@ static int chip3_get_cpu_nums(void) static unsigned long chip3_get_vt_node_mem(int nodeid) { - return *(unsigned long *)MMSIZE; + return *(unsigned long *)MMSIZE & MMSIZE_MASK; } static unsigned long chip3_get_node_mem(int nodeid) diff --git a/arch/sw_64/include/asm/hw_init.h b/arch/sw_64/include/asm/hw_init.h index f3d75e0fda7a..ede8da6b0314 100644 --- a/arch/sw_64/include/asm/hw_init.h +++ b/arch/sw_64/include/asm/hw_init.h @@ -97,6 +97,9 @@ static inline bool icache_is_vivt_no_ictag(void) return (cpu_desc.arch_var == 0x3 && cpu_desc.arch_rev == 0x1); } +#define EMUL_FLAG (0x1UL << 63) +#define MMSIZE_MASK (EMUL_FLAG - 1) + DECLARE_STATIC_KEY_TRUE(run_mode_host_key); DECLARE_STATIC_KEY_FALSE(run_mode_guest_key); DECLARE_STATIC_KEY_FALSE(run_mode_emul_key); diff --git a/arch/sw_64/kernel/setup.c b/arch/sw_64/kernel/setup.c index 27f59fe0d1b1..e5abef2dc593 100644 --- a/arch/sw_64/kernel/setup.c +++ b/arch/sw_64/kernel/setup.c @@ -74,6 +74,7 @@ #define DBGDCONT(args...) #endif + DEFINE_PER_CPU(unsigned long, hard_node_id) = { 0 }; #if defined(CONFIG_KVM) || defined(CONFIG_KVM_MODULE) @@ -644,10 +645,17 @@ static void __init setup_cpu_info(void) cpu_desc.va_bits = CPUID_VA_BITS(val); if (*(unsigned long *)MMSIZE) { - pr_info("run mode: guest\n"); static_branch_disable(&run_mode_host_key); - static_branch_enable(&run_mode_guest_key); - static_branch_disable(&run_mode_emul_key); + if (*(unsigned long *)MMSIZE & EMUL_FLAG) { + pr_info("run mode: emul\n"); + static_branch_disable(&run_mode_guest_key); + static_branch_enable(&run_mode_emul_key); + + } else { + pr_info("run mode: guest\n"); + static_branch_enable(&run_mode_guest_key); + static_branch_disable(&run_mode_emul_key); + } } else { pr_info("run mode: host\n"); static_branch_enable(&run_mode_host_key); -- 2.20.1