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| author | Bibo Mao <maobibo@loongson.cn> | 2024-05-06 17:00:47 +0300 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2024-05-06 17:00:47 +0300 |
| commit | 9753d3037964fffa5c57de8c57168dc1a4832dd4 (patch) | |
| tree | e9ef83a50e38912da77b144ad3a6d596eb2fc624 /arch/loongarch/include/asm/inst.h | |
| parent | 372631bb62d3791f0122a67f5a3e959a4d99bebd (diff) | |
| download | linux-9753d3037964fffa5c57de8c57168dc1a4832dd4.tar.xz | |
LoongArch: KVM: Add cpucfg area for kvm hypervisor
Instruction cpucfg can be used to get processor features. And there
is a trap exception when it is executed in VM mode, and also it can be
used to provide cpu features to VM. On real hardware cpucfg area 0 - 20
is used by now. Here one specified area 0x40000000 -- 0x400000ff is used
for KVM hypervisor to provide PV features, and the area can be extended
for other hypervisors in future. This area will never be used for real
HW, it is only used by software.
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/include/asm/inst.h')
| -rw-r--r-- | arch/loongarch/include/asm/inst.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/inst.h b/arch/loongarch/include/asm/inst.h index d8f637f9e400..ad120f924905 100644 --- a/arch/loongarch/include/asm/inst.h +++ b/arch/loongarch/include/asm/inst.h @@ -67,6 +67,7 @@ enum reg2_op { revhd_op = 0x11, extwh_op = 0x16, extwb_op = 0x17, + cpucfg_op = 0x1b, iocsrrdb_op = 0x19200, iocsrrdh_op = 0x19201, iocsrrdw_op = 0x19202, |