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| author | James Hogan <james.hogan@imgtec.com> | 2017-03-14 10:25:47 +0000 |
|---|---|---|
| committer | James Hogan <james.hogan@imgtec.com> | 2017-03-28 15:36:18 +0100 |
| commit | 867f4da75277aaef10daa4e0e9ad6f905fa33fb1 (patch) | |
| tree | 8c7c12c8cb1536a9876d995fd96198e0ccb94e5e /arch/mips/kvm/trap_emul.c | |
| parent | 1c506c9c104cf01d01a9633ad2e76f15f938c54c (diff) | |
| download | linux-867f4da75277aaef10daa4e0e9ad6f905fa33fb1.tar.gz linux-867f4da75277aaef10daa4e0e9ad6f905fa33fb1.tar.bz2 linux-867f4da75277aaef10daa4e0e9ad6f905fa33fb1.zip | |
KVM: MIPS/T&E: Report correct dcache line size
Octeon CPUs don't report the correct dcache line size in CP0_Config1.DL,
so encode the correct value for the guest CP0_Config1.DL based on
cpu_dcache_line_size().
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: David Daney <david.daney@cavium.com>
Cc: Andreas Herrmann <andreas.herrmann@caviumnetworks.com>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Diffstat (limited to 'arch/mips/kvm/trap_emul.c')
| -rw-r--r-- | arch/mips/kvm/trap_emul.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/mips/kvm/trap_emul.c b/arch/mips/kvm/trap_emul.c index 75ba3c4b7cd5..a563759fd142 100644 --- a/arch/mips/kvm/trap_emul.c +++ b/arch/mips/kvm/trap_emul.c @@ -12,6 +12,7 @@ #include <linux/errno.h> #include <linux/err.h> #include <linux/kvm_host.h> +#include <linux/log2.h> #include <linux/uaccess.h> #include <linux/vmalloc.h> #include <asm/mmu_context.h> @@ -644,6 +645,13 @@ static int kvm_trap_emul_vcpu_setup(struct kvm_vcpu *vcpu) /* Read the cache characteristics from the host Config1 Register */ config1 = (read_c0_config1() & ~0x7f); + /* DCache line size not correctly reported in Config1 on Octeon CPUs */ + if (cpu_dcache_line_size()) { + config1 &= ~MIPS_CONF1_DL; + config1 |= ((ilog2(cpu_dcache_line_size()) - 1) << + MIPS_CONF1_DL_SHF) & MIPS_CONF1_DL; + } + /* Set up MMU size */ config1 &= ~(0x3f << 25); config1 |= ((KVM_MIPS_GUEST_TLB_SIZE - 1) << 25); |