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[PATCH 08/15] KVM: MIPS: Use root tlb to control guest's CCA for Loongso
From: |
Huacai Chen |
Subject: |
[PATCH 08/15] KVM: MIPS: Use root tlb to control guest's CCA for Loongson-3 |
Date: |
Mon, 13 Apr 2020 15:30:17 +0800 |
KVM guest has two levels of address translation: guest tlb translates
GVA to GPA, and root tlb translates GPA to HPA. By default guest's CCA
is controlled by guest tlb, but Loongson-3 maintains all cache coherency
by hardware (including multi-core coherency and I/O DMA coherency) so it
prefers all guest mappings be cacheable mappings. Thus, we use root tlb
to control guest's CCA for Loongson-3.
Signed-off-by: Huacai Chen <address@hidden>
Co-developed-by: Jiaxun Yang <address@hidden>
---
arch/mips/kvm/vz.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/arch/mips/kvm/vz.c b/arch/mips/kvm/vz.c
index 422cd06..e30ebb2 100644
--- a/arch/mips/kvm/vz.c
+++ b/arch/mips/kvm/vz.c
@@ -2871,6 +2871,10 @@ static int kvm_vz_hardware_enable(void)
if (cpu_has_guestctl2)
clear_c0_guestctl2(0x3f << 10);
+ /* Control guest CCA attribute */
+ if (cpu_has_csr())
+ csr_writel(csr_readl(0xffffffec) | 0x1, 0xffffffec);
+
return 0;
}
--
2.7.0
- [PATCH 02/15] KVM: MIPS: Define KVM_ENTRYHI_ASID to cpu_asid_mask(&boot_cpu_data), (continued)
- [PATCH 02/15] KVM: MIPS: Define KVM_ENTRYHI_ASID to cpu_asid_mask(&boot_cpu_data), Huacai Chen, 2020/04/13
- [PATCH 03/15] KVM: MIPS: Fix VPN2_MASK definition for variable cpu_vmbits, Huacai Chen, 2020/04/13
- [PATCH 04/15] KVM: MIPS: Increase KVM_MAX_VCPUS and KVM_USER_MEM_SLOTS to 16, Huacai Chen, 2020/04/13
- [PATCH 05/15] KVM: MIPS: Add EVENTFD support which is needed by VHOST, Huacai Chen, 2020/04/13
- [PATCH 06/15] KVM: MIPS: Use lddir/ldpte instructions to lookup gpa_mm.pgd, Huacai Chen, 2020/04/13
- [PATCH 07/15] KVM: MIPS: Introduce and use cpu_guest_has_ldpte, Huacai Chen, 2020/04/13
- [PATCH 08/15] KVM: MIPS: Use root tlb to control guest's CCA for Loongson-3,
Huacai Chen <=
- [PATCH 09/15] KVM: MIPS: Let indexed cacheops cause guest exit on Loongson-3, Huacai Chen, 2020/04/13
- [PATCH 10/15] KVM: MIPS: Add more types of virtual interrupts, Huacai Chen, 2020/04/13
- [PATCH 11/15] KVM: MIPS: Add Loongson-3 Virtual IPI interrupt support, Huacai Chen, 2020/04/13
- [PATCH 12/15] KVM: MIPS: Add CPUCFG emulation for Loongson-3, Huacai Chen, 2020/04/13
- [PATCH 13/15] KVM: MIPS: Add CONFIG6 and DIAG registers emulation, Huacai Chen, 2020/04/13
- [PATCH 14/15] KVM: MIPS: Add more MMIO load/store instructions emulation, Huacai Chen, 2020/04/13
- [PATCH 15/15] KVM: MIPS: Enable KVM support for Loongson-3, Huacai Chen, 2020/04/13
- Re: [PATCH 0/15] KVM: MIPS: Add Loongson-3 support (Host Side), Jiaxun Yang, 2020/04/13