From: Tianrui Zhao <zhaotianrui@loongson.cn>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Huacai Chen <chenhuacai@kernel.org>,
WANG Xuerui <kernel@xen0n.name>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
loongarch@lists.linux.dev, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
Mark Brown <broonie@kernel.org>,
Alex Deucher <alexander.deucher@amd.com>,
Oliver Upton <oliver.upton@linux.dev>,
maobibo@loongson.cn, Xi Ruoyao <xry111@xry111.site>
Subject: [PATCH v4 28/29] LoongArch: KVM: Implement probe virtualization when loongarch cpu init
Date: Tue, 21 Mar 2023 11:56:50 +0800 [thread overview]
Message-ID: <20230321035651.598505-29-zhaotianrui@loongson.cn> (raw)
In-Reply-To: <20230321035651.598505-1-zhaotianrui@loongson.cn>
Implement probe virtualization when loongarch cpu init, including guest
gid info, guest fpu info, etc.
Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
---
arch/loongarch/kernel/cpu-probe.c | 53 +++++++++++++++++++++++++++++++
1 file changed, 53 insertions(+)
diff --git a/arch/loongarch/kernel/cpu-probe.c b/arch/loongarch/kernel/cpu-probe.c
index 3a3fce2d7..9c3483d9a 100644
--- a/arch/loongarch/kernel/cpu-probe.c
+++ b/arch/loongarch/kernel/cpu-probe.c
@@ -176,6 +176,57 @@ static void cpu_probe_common(struct cpuinfo_loongarch *c)
}
}
+static inline void cpu_probe_guestinfo(struct cpuinfo_loongarch *c)
+{
+ unsigned long guestinfo;
+
+ guestinfo = read_csr_gstat();
+ if (guestinfo & CSR_GSTAT_GIDBIT) {
+ c->options |= LOONGARCH_CPU_GUESTID;
+ write_csr_gstat(0);
+ }
+}
+
+static inline void cpu_probe_lvz(struct cpuinfo_loongarch *c)
+{
+ unsigned long gcfg, gprcfg1;
+
+ cpu_probe_guestinfo(c);
+
+ c->guest.options |= LOONGARCH_CPU_FPU;
+ c->guest.options_dyn |= LOONGARCH_CPU_FPU;
+ c->guest.options_dyn |= LOONGARCH_CPU_PMP;
+
+ c->guest.ases |= LOONGARCH_CPU_LSX;
+ c->guest.ases_dyn |= LOONGARCH_CPU_LSX;
+ gprcfg1 = read_gcsr_prcfg1();
+ c->guest.kscratch_mask = GENMASK((gprcfg1 & CSR_CONF1_KSNUM) - 1, 0);
+
+ gcfg = read_csr_gcfg();
+ if (gcfg & CSR_GCFG_MATP_GUEST)
+ c->guest_cfg |= BIT(0);
+ if (gcfg & CSR_GCFG_MATP_ROOT)
+ c->guest_cfg |= BIT(1);
+ if (gcfg & CSR_GCFG_MATP_NEST)
+ c->guest_cfg |= BIT(2);
+ if (gcfg & CSR_GCFG_SITP)
+ c->guest_cfg |= BIT(6);
+ if (gcfg & CSR_GCFG_TITP)
+ c->guest_cfg |= BIT(8);
+ if (gcfg & CSR_GCFG_TOEP)
+ c->guest_cfg |= BIT(10);
+ if (gcfg & CSR_GCFG_TOPP)
+ c->guest_cfg |= BIT(12);
+ if (gcfg & CSR_GCFG_TORUP)
+ c->guest_cfg |= BIT(14);
+ if (gcfg & CSR_GCFG_GCIP_ALL)
+ c->guest_cfg |= BIT(16);
+ if (gcfg & CSR_GCFG_GCIP_HIT)
+ c->guest_cfg |= BIT(17);
+ if (gcfg & CSR_GCFG_GCIP_SECURE)
+ c->guest_cfg |= BIT(18);
+}
+
#define MAX_NAME_LEN 32
#define VENDOR_OFFSET 0
#define CPUNAME_OFFSET 9
@@ -289,6 +340,8 @@ void cpu_probe(void)
if (cpu == 0)
__ua_limit = ~((1ull << cpu_vabits) - 1);
#endif
+ if (cpu_has_lvz)
+ cpu_probe_lvz(c);
cpu_report();
}
--
2.31.1
next prev parent reply other threads:[~2023-03-21 3:59 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-21 3:56 [PATCH v4 00/29] Add KVM LoongArch support Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 01/29] LoongArch: KVM: Add kvm related header files Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 02/29] LoongArch: KVM: Implement kvm module related interface Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 03/29] LoongArch: KVM: Implement kvm hardware enable, disable interface Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 04/29] LoongArch: KVM: Implement VM related functions Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 05/29] LoongArch: KVM: Add vcpu related header files Tianrui Zhao
2023-03-21 12:30 ` Xi Ruoyao
2023-03-22 1:34 ` Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 06/29] LoongArch: KVM: Implement vcpu create and destroy interface Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 07/29] LoongArch: KVM: Implement vcpu run interface Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 08/29] LoongArch: KVM: Implement vcpu handle exit interface Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 09/29] LoongArch: KVM: Implement vcpu get, vcpu set registers Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 10/29] LoongArch: KVM: Implement vcpu ENABLE_CAP ioctl interface Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 11/29] LoongArch: KVM: Implement fpu related operations for vcpu Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 12/29] LoongArch: KVM: Implement vcpu interrupt operations Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 13/29] LoongArch: KVM: Implement misc vcpu related interfaces Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 14/29] LoongArch: KVM: Implement vcpu load and vcpu put operations Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 15/29] LoongArch: KVM: Implement vcpu status description Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 16/29] LoongArch: KVM: Implement update VM id function Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 17/29] LoongArch: KVM: Implement virtual machine tlb operations Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 18/29] LoongArch: KVM: Implement vcpu timer operations Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 19/29] LoongArch: KVM: Implement kvm mmu operations Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 20/29] LoongArch: KVM: Implement handle csr excption Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 21/29] LoongArch: KVM: Implement handle iocsr exception Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 22/29] LoongArch: KVM: Implement handle idle exception Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 23/29] LoongArch: KVM: Implement handle gspr exception Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 24/29] LoongArch: KVM: Implement handle mmio exception Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 25/29] LoongArch: KVM: Implement handle fpu exception Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 26/29] LoongArch: KVM: Implement kvm exception vector Tianrui Zhao
2023-03-21 3:56 ` [PATCH v4 27/29] LoongArch: KVM: Implement vcpu world switch Tianrui Zhao
2023-03-21 8:07 ` kernel test robot
2023-03-21 3:56 ` Tianrui Zhao [this message]
2023-03-21 3:56 ` [PATCH v4 29/29] LoongArch: KVM: Enable kvm config and add the makefile Tianrui Zhao
2023-03-21 8:48 ` kernel test robot
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