mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-10-01 14:44:12 +00:00
Code Issues Releases Wiki Activity

MIPS: KVM: Simplify default guest Config registers

Browse source 
Various semi-used definitions exist in kvm_host.h for the default guest
config registers. Remove them and use the appropriate values directly
when initialising the Config registers.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
This commit is contained in:
James Hogan 2015-03-04 15:56:47 +00:00
parent 7bd4acec42
commit 2211ee810a
2 changed files with 9 additions and 31 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

25
arch/mips/include/asm/kvm_host.h
View file

@ -265,31 +265,6 @@ struct mips_coproc {
#define CP0C3_SM 1
#define CP0C3_TL 0
/* Have config1, Cacheable, noncoherent, write-back, write allocate*/
#define MIPS_CONFIG0 \
((1 << CP0C0_M) | (0x3 << CP0C0_K0))
/* Have config2, no coprocessor2 attached, no MDMX support attached,
no performance counters, watch registers present,
no code compression, EJTAG present, no FPU, no watch registers */
#define MIPS_CONFIG1 \
((1 << CP0C1_M) | \
(0 << CP0C1_C2) | (0 << CP0C1_MD) | (0 << CP0C1_PC) | \
(0 << CP0C1_WR) | (0 << CP0C1_CA) | (1 << CP0C1_EP) | \
(0 << CP0C1_FP))
/* Have config3, no tertiary/secondary caches implemented */
#define MIPS_CONFIG2 \
((1 << CP0C2_M))
/* No config4, no DSP ASE, no large physaddr (PABITS),
no external interrupt controller, no vectored interrupts,
no 1kb pages, no SmartMIPS ASE, no trace logic */
#define MIPS_CONFIG3 \
((0 << CP0C3_M) | (0 << CP0C3_DSPP) | (0 << CP0C3_LPA) | \
(0 << CP0C3_VEIC) | (0 << CP0C3_VInt) | (0 << CP0C3_SP) | \
(0 << CP0C3_SM) | (0 << CP0C3_TL))
/* MMU types, the first four entries have the same layout as the
CP0C0_MT field. */
enum mips_mmu_types {

15
arch/mips/kvm/trap_emul.c
View file

@ -396,8 +396,9 @@ static int kvm_trap_emul_vcpu_setup(struct kvm_vcpu *vcpu)
* guest will come up as expected, for now we simulate a MIPS 24kc
*/
kvm_write_c0_guest_prid(cop0, 0x00019300);
kvm_write_c0_guest_config(cop0,
MIPS_CONFIG0 | (0x1 << CP0C0_AR) |
/* Have config1, Cacheable, noncoherent, write-back, write allocate */
kvm_write_c0_guest_config(cop0, MIPS_CONF_M | (0x3 << CP0C0_K0) |
(0x1 << CP0C0_AR) |
(MMU_TYPE_R4000 << CP0C0_MT));
/* Read the cache characteristics from the host Config1 Register */
@ -413,10 +414,12 @@ static int kvm_trap_emul_vcpu_setup(struct kvm_vcpu *vcpu)
(1 << CP0C1_WR) | (1 << CP0C1_CA));
kvm_write_c0_guest_config1(cop0, config1);
kvm_write_c0_guest_config2(cop0, MIPS_CONFIG2);
/* MIPS_CONFIG2 | (read_c0_config2() & 0xfff) */
kvm_write_c0_guest_config3(cop0, MIPS_CONFIG3 | (0 << CP0C3_VInt) |
(1 << CP0C3_ULRI));
/* Have config3, no tertiary/secondary caches implemented */
kvm_write_c0_guest_config2(cop0, MIPS_CONF_M);
/* MIPS_CONF_M | (read_c0_config2() & 0xfff) */
/* No config4, UserLocal */
kvm_write_c0_guest_config3(cop0, MIPS_CONF3_ULRI);
/* Set Wait IE/IXMT Ignore in Config7, IAR, AR */
kvm_write_c0_guest_config7(cop0, (MIPS_CONF7_WII) | (1 << 10));