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ppc/hash64: Rework R and C bit updates

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With MT-TCG, we are now running translation in a racy way, thus
we need to mimic hardware when it comes to updating the R and
C bits, by doing byte stores.

The current "store_hpte" abstraction is ill suited for this, we
replace it with two separate callbacks for setting R and C.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <20190411080004.8690-4-clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Benjamin Herrenschmidt 2019-04-11 10:00:01 +02:00 • committed by David Gibson
parent 993aaf0c00
commit a2dd4e83e7
6 changed files with 93 additions and 45 deletions
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4
target/ppc/cpu.h
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@ -1265,8 +1265,8 @@ struct PPCVirtualHypervisorClass {
void (*unmap_hptes)(PPCVirtualHypervisor *vhyp,
const ppc_hash_pte64_t *hptes,
hwaddr ptex, int n);
void (*store_hpte)(PPCVirtualHypervisor *vhyp, hwaddr ptex,
uint64_t pte0, uint64_t pte1);
void (*hpte_set_c)(PPCVirtualHypervisor *vhyp, hwaddr ptex, uint64_t pte1);
void (*hpte_set_r)(PPCVirtualHypervisor *vhyp, hwaddr ptex, uint64_t pte1);
void (*get_pate)(PPCVirtualHypervisor *vhyp, ppc_v3_pate_t *entry);
target_ulong (*encode_hpt_for_kvm_pr)(PPCVirtualHypervisor *vhyp);
};