mirror of https://gitee.com/openkylin/qemu.git
target/ppc: Add execute permission checking to access authority check
Basic storage protection defines various access authority permissions based on a slb storage key and pte pp value pair. This access authority defines read, write and execute permissions however currently we only use this to control read and write permissions and ignore the execute control. Fix the code to allow execute permissions based on the key-pp value pair. Execute is allowed under the same conditions which enable reads. (i.e. read permission -> execute permission) Signed-off-by: Suraj Jitindar Singh <sjitindarsingh@gmail.com> Acked-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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@ -308,28 +308,27 @@ static int ppc_hash64_pte_prot(PowerPCCPU *cpu,
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case 0x0:
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case 0x1:
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case 0x2:
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prot = PAGE_READ | PAGE_WRITE;
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prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
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break;
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case 0x3:
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case 0x6:
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prot = PAGE_READ;
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prot = PAGE_READ | PAGE_EXEC;
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break;
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}
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} else {
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switch (pp) {
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case 0x0:
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case 0x6:
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prot = 0;
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break;
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case 0x1:
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case 0x3:
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prot = PAGE_READ;
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prot = PAGE_READ | PAGE_EXEC;
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break;
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case 0x2:
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prot = PAGE_READ | PAGE_WRITE;
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prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
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break;
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}
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}
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