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KVM: PPC: Book3S: PR: Enable interrupts earlier

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Now that the svcpu sync is interrupt aware we can enable interrupts
earlier in the exit code path again, moving 32bit and 64bit closer
together.

While at it, document the fact that we're always executing the exit
path with interrupts enabled so that the next person doesn't trap
over this.

Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexander Graf 2013-11-29 02:32:31 +01:00
parent 40fdd8c88c
commit 3d3319b45e
2 changed files with 2 additions and 10 deletions
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6
arch/powerpc/kvm/book3s_interrupts.S
View File

@ -129,6 +129,7 @@ kvm_start_lightweight:
* R12 = exit handler id
* R13 = PACA
* SVCPU.* = guest *
* MSR.EE = 1
*
*/
@ -148,11 +149,6 @@ kvm_start_lightweight:
nop
#ifdef CONFIG_PPC_BOOK3S_64
/* Re-enable interrupts */
ld r3, HSTATE_HOST_MSR(r13)
ori r3, r3, MSR_EE
MTMSR_EERI(r3)
/*
* Reload kernel SPRG3 value.
* No need to save guest value as usermode can't modify SPRG3.

6
arch/powerpc/kvm/book3s_rmhandlers.S
View File

@ -153,15 +153,11 @@ _GLOBAL(kvmppc_entry_trampoline)
li r6, MSR_IR | MSR_DR
andc r6, r5, r6 /* Clear DR and IR in MSR value */
#ifdef CONFIG_PPC_BOOK3S_32
/*
* Set EE in HOST_MSR so that it's enabled when we get into our
* C exit handler function. On 64-bit we delay enabling
* interrupts until we have finished transferring stuff
* to or from the PACA.
* C exit handler function.
*/
ori r5, r5, MSR_EE
#endif
mtsrr0 r7
mtsrr1 r6
RFI