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authorMark Rutland <mark.rutland@arm.com>2018-11-09 16:07:10 +0100
committerMarc Zyngier <marc.zyngier@arm.com>2018-12-18 15:10:36 +0100
commit0d640732dbebed0f10f18526de21652931f0b2f2 (patch)
treeaa9c116f560d604190b904d0a0b966cdae8e6519 /kernel
parentLinux 4.20-rc4 (diff)
downloadlinux-0d640732dbebed0f10f18526de21652931f0b2f2.tar.xz
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arm64: KVM: Skip MMIO insn after emulation
When we emulate an MMIO instruction, we advance the CPU state within decode_hsr(), before emulating the instruction effects. Having this logic in decode_hsr() is opaque, and advancing the state before emulation is problematic. It gets in the way of applying consistent single-step logic, and it prevents us from being able to fail an MMIO instruction with a synchronous exception. Clean this up by only advancing the CPU state *after* the effects of the instruction are emulated. Cc: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Christoffer Dall <christoffer.dall@arm.com> Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'kernel')
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